Answer: 5,242 J
Explanation:
Step by step:
The formula for this is Q=mcΔT
Find out your values and then plug-and-play.
Q= unknown (energy amt we need to find out)
m= 167g
c= 2.093 J/go°C
ΔT= -20.0° + 15° would give you -5.0°
Plug into the equation for Q=(167g)(2.093 J/g°C)(15°C).
Solve and you get 5,242 J.
hope this helps!!
The heat required to change the temperature of 167 g of ice from -20.0 °C to -5.0 °C is approximately 5246.2 Joules.
Explanation:To find the amount of heat required to change the temperature of an object, we use the formula:
q = mcΔT
where:
- q is the heat energy (in joules),
- m is the mass of the substance (in grams),
- c is the specific heat capacity of the substance (in J/g°C), and
- ΔT is the change in temperature (in °C).
Here, the mass of the ice (m) is 167 g, the specific heat capacity of ice (c) is 2.093 J/g°C, and the change in temperature (ΔT) is -5.0°C - (-20.0°C) = 15.0°C.
Substitute the values into the formula:
q = (167 g)(2.093 J/g°C)(15.0°C) = 5246.205 J
Therefore, the heat required is about 5246.2 Joules.
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The _____ identifies an element.
Answer:
protons
Explanation:
Sulfur and Chlorine gas combine to form disulfurdichloride according to the following synthesis reaction:
S8 + 4Cl2 → 4S2Cl2
If we are given 100. g of Cl2 and 200. g of S8, what is the limiting reactant? What is the actual calculated mole ratio?
A) Cl2; 1.81:1
B) S8; 1.81:1
C) Cl2; 4:1
D) S8; 4:1
Answer:
A) Cl2; 1.81:1
what mass of sodium chromate in grams is needed to produce
5.17
mol
of sodium nitrate?
The question is incomplete, complete question is :
For the following chemical reaction, what mass of sodium chromate in grams will be needed to produce 5.17 mol of sodium nitrate?
[tex]2AgNO_3 + Na_2CrO_4\rightarrow Ag_2CrO_4 + 2NaNO_3[/tex]
Answer:
418.77 grams of sodium chromate is needed to produce 5.17 mol es of sodium nitrate.
Explanation:
[tex]2AgNO_3 + Na_2CrO_4\rightarrow Ag_2CrO_4 + 2NaNO_3[/tex]
According to reaction, 2 moles of sodium nitarte is obtained from 1 mole of sodium chromate .
Then 5.17 moles of sodium nitarte will be obtained from :
[tex]\frac{1}{2}\times 5.17 mol=2.585 mol[/tex] of sodium chromate
Mass of sodium chromate :
[tex]2.585\times 162 g/mol=418.77 g[/tex]
418.77 grams of sodium chromate is needed to produce 5.17 mol es of sodium nitrate.
calculate the molecular mass of Na2HPO4
Answer:
Molar mass of Na2HPO4=141.96, of Na2HPO4. 12H2O = 358.14: so to get the same 0.4 M: 28.65/358.14*141.96 g, add water until you reach 200ml , dissolve all solid and then filter to make sterile.
Explanation:
141g/mol is the molecular mass of Na[tex]_2[/tex]HPO[tex]_4[/tex]. It is also known as molecular weight. It is computed by multiplying the mass of every atom.
What is molecular mass?The quantity of mass associated with such a molecule is referred to as its molecular mass. It is also known as molecular weight. It is computed by multiplying the mass of every atom by the amount of atoms from the element in the molecule. Water, for example, is composed of two hydrogen atoms and one oxygen atom.
The total of the atomic weight of the atoms within a molecule yields the molecule's molecular mass. The molecular mass expresses the mass of such a molecule in relation to the mass of both the 12C atom, which itself is assumed to be 12.
Molecular mass = Molar mass of sodium×2+ molar mass of hydrogen + molar mass of phosphorus+ 4 molar mass of oxygen
Molecular mass = 23×2+1 + 30+ 4× 16=141g/mol
Therefore, 141g/mol is the molecular mass of Na[tex]_2[/tex]HPO[tex]_4[/tex].
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Which equation is derived from the combined gas law?
OV, T = P₂72
O Pq V, T, - P ₂ V2 T 2
Answer:
[tex]\frac{p_1 V_1}{T_1}=\frac{p_2 V_2}{T_2}[/tex]
Explanation:
The equation of state (combined gas law) for an ideal gas states that
[tex]pV=nRT[/tex]
where
p is the gas pressure
V is the volume of the gas
n is the number of moles of the gas
R is the gas constant
T is the absolute temperature of the gas
The equation can be rewritten as
[tex]\frac{pV}{T}=nR[/tex]
For an ideal gas that undergoes a transformation, if the amount of gas remains the same, the term on the right of the equation remains constant. This means that the ratio
[tex]\frac{pV}{T}[/tex]
for the gas remains constant, and therefore we can rewrite the equation as
[tex]\frac{p_1 V_1}{T_1}=\frac{p_2 V_2}{T_2}[/tex]
where 1 indicates the initial conditions of the gas while 2 indicates the conditions of the gas after the transformation.
Answer:
f
ExplaOV, T = P₂72
natifon:
If you have 1.50 ton of poppy seeds and measure out 20.00 mg of seeds to determine that the average mass is 2.0 mg/ 19 seeds, how many seed are there in your 1.50 ton of poppy seeds? Use 454 g = 1.00 pounds
Answer:
18098
Explanation:
Maurice rolls a bowling ball with a mass of 9 kg down the bowling lane. The ball strikes all 10 pins and Maurice gets a strike. The balls acceleration was 12 m/s^2. With what force did Maurice throw the bowling ball?
Answer:
108 N
Explanation:
F = m × a
Force equals mass × acceleration, for more you can see Newton's second law.
Mercury has one of the lowest specific heat capacities. If 257 J of heat are added to 0.45 KJ of mercury, the Mercury’s temperature will increase by 4.09 K. What is the specific heat capacity of mercury?
Answer:
139.67 (J/kgk)
Explanation:
Given data:
mass of mercury = m = 0.45 Kg
Amount of energy = Q = 257 J
Increase in the temperature = ΔT = 4.09 K
To find:
Specific heat capacity = C
Formula:
By using specific heat equation,
Q = m x C X ΔT
C = Q / m x ΔT
= 257J / o.45 kg x 4.09K
= 257J / 1.84
= 139.67 (J/kgk)
Specific heat of mercury is 139.67 (J/kgk).
PLEASE ANSWER
These two containers have a pink liquid in them. Which of these containers has more thermal energy and why?
A. Container B has more thermal energy because the temperature is higher.
B. Container A has more thermal energy since there is more room for the liquid to move around.
C. Even thought the temperature is the same,, container A has more thermal energy since it has less liquid than container B
D. Even thought the temperature is the same, container B has more thermal energy since it has more liquid than container A
D. Even though the temperature is the same, container B has more thermal energy, since it has more liquid than container A.
Explanation:
Whenever there is an increase in the volume of the pink liquid, it is due to the increase in temperature.
When the temperature increases, the molecules move farther apart as much as possible.
When the molecules moves apart from each other and collide with each other, so that its kinetic energy also increases, So thermal energy of the container B is more compared to the container A.
Final answer:
Container B has more thermal energy because it holds more liquid than container A, resulting in more total kinetic energy among its molecules, despite both containers having the same temperature.
Explanation:
The correct answer to the student's question is D. Even though the temperature is the same, container B has more thermal energy since it has more liquid than container A. Thermal energy depends on both the temperature of the liquid and the amount of substance that is present. In this case, despite having the same temperature, the larger volume of liquid in container B contains more molecules. Each molecule possesses a certain amount of kinetic energy due to its movement, so more molecules mean more total kinetic energy, which results in higher thermal energy. It's important to note that thermal energy is an extensive property; it depends on the amount of matter, so the more liquid there is (assuming everything else is constant), the more thermal energy there will be.
[Help] i am doing a crossword and it is a four letter word - _o_ _ the question is (scientist who developed the planetary model of the atom)
Neils Bohr
Development of the Atomic Theory. In 1913, Neils Bohr, a student of Rutherford 's, developed a new model of the atom. He proposed that electrons are arranged in concentric circular orbits around the nucleus. This model is patterned on the solar system and is known as the planetary model.
Answer: Neils Bohr
Explanation: In 1913, Neils was a student of Rutherford 's. He developed a new model of the atom. He explained that electrons are orignized in concentric circular orbits around the nucleus. This model is patterned on the solar system and is known as the planetary model.
go to abcte.org
what is the number of neon for the periodic table
Answer:
it is 10
Explanation:
Answer:
10
Explanation:
Ok, so anyone who knows anything about radiation science knows it is deadly because it is rapidly replacing its neutron, while it does this it releases protons and electrons ( I think, correct me if I'm wrong ), so my question is, how is this deadly to humans, how is exposion to protons and electrons deadly?
Radiation science is deadly to humans/ living organisms because it can cause damage to our cells and cancer.
Explanation:
The ionization of materials, basically replacing neutrons while it releases protons and electrons can cause the emission of harmful radiations, basically neutron radiation, proton radiation, X-rays, high-speed electrons gamma rays. These waves are extremely harmful to humans. Being exposed to these waves for a long time can cause cancer and also tissue damage. The above-mentioned waves are extremely powerful since it is capable of breaking chemical bonds. It can change the composition and chemical structure of animal cells. This would lead to harmful health problems.Chemical reactions are used to produce a variety of products, such as
Answer:
chlorinesoap and detergentscleansing agentssynthetic fabricsplastic (PVC, bakelite, polyethylene)stealgasolineExplanation:
Chemical reactions involve the transformation of substances, called reactants, by breaking some bonds and forming new bonds, to obtain different substances called the products.
In the chemical reactions the atoms of the reactants are rearranged giving rise to the products, which will contain the same atoms but bonded differently or even as separate elements.
Using chemical reactions the human being can, for example, produce chlorine from sodium chloride solutions (from the oceans). In the same reaction, caustic soda (sodium hydroxide, NaOH) and hydrogen gas (H₂), are produced as by-products.
The properties of the products of a chemical reaction are very different from those of the reactants: sodium chloride is consumed by the humans every day in almost every meal, while chlorine and caustic soda are lethal if human beings consume them in some way.
Some examples of the variety of products produced from chemical reactions include:
soap and detergentscleansing agentssynthetic fabricsplastic (PVC, bakelite, polyethylene)stealgasolineThe list could be huge, because most of the things that the human being use are manufactured using chemical reactions.
In the process of cellular respiration,carbohydrate combines with _______ to produce carbon dioxide._________,and energy
The energy is generally not needed immediately, so it is used to combine ADP with phosphate ions to form ATP molecules. During the process of cellular respiration, carbon dioxide is given off as a waste product. This carbon dioxide can be used by photosynthesizing cells to form new carbohydrates.
Answer:
w
Explanation:
In the mathematical equation showing that volume (V) divided by temperature (T) remains equal to a constant (k), volume and temperature are _______________ proportional
Answer:
Directly
Explanation:
[tex]\dfrac{V}{T} = k[/tex]
If V increases, then T must also increase to keep the same ratio.
If V decreases, then T must also decrease to keep the same ratio.
V and T are directly proportional, because a change in one always causes a change in the other and the changes are in the same ratio. The constant k is called the proportionality constant.
I need help please!
Answer:
1. Dipoles
2. London Dispersion
3. weaker
4. long distances
5.easy
Explanation:
Determine the molar mass of a compound that has a density of 0.1633 g/L at STP.
(show work)
Answer:
M.Mass = 3.66 g/mol
Data Given:
M.Mass = M = ??
Density = d = 0.1633 g/L
Temperature = T = 273.15 K (Standard)
Pressure = P = 1 atm (standard)
Solution:
Let us suppose that the gas is an ideal gas. Therefore, we will apply Ideal Gas equation i.e.
P V = n R T ---- (1)
Also, we know that;
Moles = n = mass / M.Mass
Or, n = m / M
Substituting n in Eq. 1.
P V = m/M R T --- (2)
Rearranging Eq.2 i.e.
P M = m/V R T --- (3)
As,
Mass / Volume = m/V = Density = d
So, Eq. 3 can be written as,
P M = d R T
Solving for M.Mass i.e.
M = d R T / P
Putting values,
M = 0.1633 g/L × 0.08205 L.atm.K⁻¹.mol⁻¹ × 273.15 K / 1 atm
M = 3.66 g/mol
what happed on monday march 10 2010
Answer: Carlos Slim becomes the first Mexican and person from an emerging economy to top Forbes Richest Person list, with net worth of US$53.5 billion
What happens to iron when it melts?
When iron melts in 912 degrees Celsius, in starting the atoms of the iron become more packed and then in 1,394 degrees Celsius, the atoms loose again and melts.
What is melting?Melting is a process by which the substance that is in solid starts to become liquid. The changing of the solid into liquid is called melting. Usually in high temperature, the substance starts to melting.
Thus, when iron melts in 912 degrees Celsius, in starting the atoms of the iron become more packed and then in 1,394 degrees Celsius, the atoms loose again and melts.
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Write a mathematical equation showing that pressure (P) multiplied by volume (V) remains equal to a constant (k).
Answer:
did you get the answer?
Explanation:
?
The mathematical expression of Boyle's law is a constant pressure and constant volume, which can be showed as: P V = k, where P is pressure, V is volume and k is a constant.
What is Boyle's law ?According to Boyle's law, the volume of a given mass of a dry gas at constant temperature is inversely proportional to its pressure. At moderate pressures and temperatures, most gases behave like ideal gases.
The technology of the 17th century was incapable of producing extremely high pressures or extremely low temperatures.
This empirical relationship, established in 1662 by physicist Robert Boyle, states that the pressure (p) of a given quantity of gas varies inversely with its volume (v) at constant temperature; in equation form, pv = k, a constant.
Thus, This means that for a constant pressure, a constant volume must be kept.
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An elastic spring stores 45 [j] of elastic potential energy when it is stretched by 2cm. what is the spring constant ?
Answer:
225000
N/m
Explanation:
Final answer:
The spring constant is 5 N/cm.
Explanation:
The equation for elastic potential energy is given as:
U = 1/2kx^2
Where:
U is the elastic potential energy in joulesk is the spring constant in N/cmx is the displacement of the spring in cmIn this case, we are given that the elastic potential energy is 45 J and the displacement is 2 cm. Substituting these values into the equation, we get:
45 J = 1/2k(2 cm)^2
Simplifying, we find:
45 J = 2k cm^2
Solving for k, we divide both sides by 2(2 cm)^2:
k = 45 J / 2(2 cm)^2
k = 5 N/cm
Therefore, the spring constant is 5 N/cm.
Which factor is not a characteristic of a mineral?
A. crystalline structure that forms a geometric shape
B. always a solid; never a liquid or a gas
C. naturally occurring, inorganic substance
D. a variable chemical composition
A mineral is defined by its crystalline structure, solid state, naturally occurring and inorganic nature, and definite chemical composition. Therefore, 'a variable chemical composition' is not a characteristic of a mineral. The correct option is: D.
To determine which factor is not a characteristic of a mineral, we need to understand the key properties that define a mineral.
A mineral is characterized by the following:
Crystalline structure that forms a geometric shape: This indicates that the internal arrangement of atoms is orderly and repetitive.Always a solid; never a liquid or a gas: Minerals must be in the solid state at normal temperatures.Naturally occurring, inorganic substance: Minerals form naturally without any biological processes and are not composed of complex carbon molecules common in organic substances.A definite chemical composition: Minerals generally have a specific chemical formula, though some can have slight variations due to element substitution.Given this definition, the correct answer to the question is:
D. a variable chemical compositionMinerals have a definite chemical composition, which makes option D incorrect.
[A]a[B]b [C]c [D]d
When the Keq value is large, the number representing [A]a[B]b must be (larger or smaller) than the number representing [C]c[D]d. This relationship means that the (reactants or products) must be favored and that the mixture at equilibrium is largely (reactants or products).
Answer:
Smaller; products; products
Explanation:
aA + bB ⇌ cC + dD
[tex]K_{\text{eq}} = \dfrac{\text{[C]}^{c}\text{[D]}^{d}}{\text{[A]}^{a}\text{[B ]}^{b}}\\\\\text{When the $K_{\text{eq}}$ is large, the number representing [A]$^{a}$[B ]$^{b}$ must be $\textbf{smaller}$ than the}\\\text{number representing [C]$^{c}$[D]$^{d}$. This relationship means that the $\textbf{products}$ must be favoured}\\\text{and that the mixture at equilibrium is largely $\textbf{products}$.}[/tex]
5x-13 =12 write description that represents the equation
Answer:
x = 5
Because 12 + 13 = 5x
25 = 5x
x = 5
Answer:
5
Explanation:
Mary had 5 dollars she owe her friend Mia 13 dollars but she didn't have enough. so multiply how much she has to give to mia
Forensic science is the application of science to what field?
OA. Biology
OB. Criminal Justice
C.
Art History
OD. Philosophy
Answer:
it's criminal justice
Explanation:
Forensic science, also known as criminalistics, is the application of science to criminal and civil laws.
Forensic science is the application of science to B. Criminal Justice.
Explanation:Forensic science is a multidisciplinary field that applies scientific principles and techniques to solve crimes and aid the criminal justice system. It encompasses various specialties, including DNA analysis, fingerprint examination, ballistics, and toxicology, helping investigators gather evidence, identify suspects, and ensure justice is served in criminal cases.
It involves the use of scientific methods and techniques to examine and analyze evidence in criminal investigations. Forensic scientists apply their knowledge in disciplines such as biology, chemistry, physics, and even mathematics to help solve crimes and provide evidence in legal proceedings.
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the elements fluorine,chlorine,bromine,and iodine are all found in the same group on the table. these elements are grouped together because they
Answer:
Fluorine, chlorine, bromine and iodine are grouped together because they have the same number of valence electrons.
Explanation:
Fluorine, chlorine, bromine and iodine are all found in group 7, which is the second-last column from the right. Group 7 elements are also called the "Halogens" family.
The group number also tells you the number of valence electrons that the elements have in that group. Valence electrons mean the outermost electrons (See picture).
For example, fluorine has two shells (the circles with dots on them). The outermost electrons, or valence electrons, are the dots on the biggest circle. There are 7 dots, so there are 7 valence electrons, which corresponds with Group "7".
A full shell (except the for first shell) is when there are 8 dots. Since 7 is so close to 8, Halogens are very reactive.
Fluorine, chlorine, bromine and iodine all have 7 valence electrons and are in the Halogens family, which are very reactive.
The elements fluorine, chlorine, bromine, and iodine are grouped together because they belong to the same group on the periodic table and share similar chemical properties.
Explanation:The elements fluorine, chlorine, bromine, and iodine are grouped together because they belong to the same group on the periodic table.
These elements are part of Group 17, also known as the halogens. They share similar chemical properties due to having the same number of valence electrons.
For example, they all have seven valence electrons, which allows them to easily gain one electron to achieve a stable electron configuration like the noble gas neon.
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Choose all the answers that apply.
Earth's water:
is reused and recycled
is mostly freshwater
is strongly attracted to other materials
has a neutral pH value
can dissolve more substances than any other liquid
Answer:
- is reused and recycled
- can dissolve more substances than any other liquid
Explanation:
Earth water is reused and recycles in the form of the water cycle (hydrological cycle). In this cycle, water from the earth surface evaporates in the atmosphere, cool and condense into cloud or snow and fall to the earth surface.
As a universal solvent, water can dissolve more substances than any other liquid. The polar arrangement of oxygen and hydrogen atom in the water molecules makes it excellent salt.
On Earth, ~2.5% is a freshwater whereas 97.5% is salt water. The pH of water differs for surface and salt water, i.e. neutral to alkaline respectively. Water molecules attract to other water molecules better than the other substances. Therefore, other options are incorrect.
Answer:
recycled and reused
strongly attracted to itself
not attracted to other materials
easily dissolved in other liquids
Explanation:
Help please I need the answer
Answer:
Polyatomic Ionic Compound
Explanation:
In given statement the compound given is called as Sodium oleate this means that when Oleic acid is treated with NaOH then it forms.
In chemistry there are few species which are involved in the formation of compounds.
(i) Atoms:
It is very common that atoms of different elements combine to form compound through covalent bond. For example, H₂, O₂, N₂, F₂ e.t.c.
(i) Ions:
Other than covalent compounds we have ionic compounds. Ionic compounds are made up of ions. These ions forming the ionic compounds can be monatomic like Na⁺, Br⁻, Mg²⁺, Al³⁺, N⁻³ or they can be polyatomic like CO₃²⁻, SO₄²⁻, NH₄⁺, PO₄³⁻ e.t.c.
(iii) Polyatomic Ions:
In polyatomic ions we find a charge on a molecule which contains two or more atoms bonded covalently. Hence, in given compound we have a long chain of molecule containing a negative charge neutralized by opposite +ve charged sodium ion. Hence, Sodium oleate is a polyatomic ionic compound.
The chart show the masses and velocities of two colliding
objects that stick together after a collision
According to the law of conservation of momentum, the
momentum of the object after the collision is
kg. m/s.
Mass (kg) Velocity (m/s)
L 200
15
150 |
The momentum of the object is 1500 kgm/s.
Explanation:The law of conservation of momentum states that without effect of any external force in the system, the momentum of the system remains conserved. And momentum is defined as the product of the mass and velocity of the object.
Here, the mass of the 1st body = 200kg.
The mass of the 2nd body = 150kg.
Velocity of the 1st body = 15 m/s.
Velocity of the 2nd body = - 10 m/s.
So, the total momentum of the system before collision = [tex]200\times15 + 150\times{-10[/tex] kgm/s
= 1500 kgm/s.
After the collision, the body sticks together.
So, the total mass =200+150 kg = 350 kg.
Momentum remains conserved. So the momentum of the body= 1500 kgm/s.
Which of the following is a pure substance made up of one type of atom?
A) bronze
B) lead
C) steel
D) brass
Answer:
B
Explanation:
The others are alloys and therefore do not appear on the periodic table
Lead is the correct answer as it is an element, which is a pure substance made up of one type of atom, unlike bronze, brass, and steel, which are alloys.
When asked which of the following is a pure substance made up of one type of atom, the correct answer is B) lead. An element is defined as a pure substance that cannot be broken down into simpler substances by chemical means and consists of one type of atom. Therefore, lead, which is an element, fits this description perfectly.
It's important to note that, unlike lead, bronze, brass, and steel are alloys, which are mixtures of two or more elements, with at least one being a metal. Bronze is an alloy of copper and tin, brass is an alloy of copper and zinc, and steel is an alloy typically made of iron and carbon. Each of these is not a pure substance because they contain more than one type of atom.