22. Julie took a road trip to Canada. She traveled a total of 1,750 miles in 25 hours.
Calculate Julie's average speed.

Answer:

e. 4.847 x 10-19 J

Explanation:

From the given information:

The equation connecting the photon energy and the wavelength is:

[tex]E_{photon } = \dfrac {hc}{\lambda}[/tex]

where;

[tex]planck's \ constant \ (h)[/tex]= 6.626 * 10 ^{-34} J.s

[tex]velocity \ of \ light \ (c)[/tex] = 3.00 * 10^8 m/s

wavelength [tex]\lambda = 410.1 \ nm \times \dfrac{10^{-9} \ m}{1 \ nm}[/tex]

[tex]\lambda = 4.101 \times 10^{-7} \ m[/tex]

To determine the photon energy of violet light

[tex]E_{photon } = \dfrac {(6.626 \times 10^{-34} J/s ) \times (3.00 \times 10^8 \ m/s) }{4.101 \times 10^{-7} \ m}[/tex]

= 4.847 × 10⁻¹⁹ J

Answer:

d) Mass = 460 g      

Explanation:

Given data:

Mass of N₂O₄ produced = ?

Number of moles of NO₂ consumed = 10 mol

Solution:

2NO₂     →        N₂O₄

Now we will compare the moles of NO₂  and   N₂O₄.

                          NO₂         :             N₂O₄

                            2            :                1

                           10            :            1/2×10 = 5 mol

Mass of  N₂O₄ produced:

Mass =  number of moles × molar mass

Mass = 5 mol × 92 g/mol

Mass = 460 g            

Answer: the heavy ball of a demolition machine is storing energy when it is held at an elevated position.

Which has potential energy

Explanation:

Answer: hope u dont mind i think ash answer ur question just imagine i had the correct answer woah UwU

Explanation:

Explanation:

the answer is in the attachment

Answer:

what is the question i could help if u gave me the question but i don't see it  

Explanation:

Answer:

The number of moles of calcium atom in each mole of calcium carbonate is 1 mole of calcium atoms

Explanation:

The chemical formula for CaCO₃ = 100.086 g

The number of molecules in one mole of a substance is given by the Avogadro's number, [tex]N_A[/tex] = 6.022 × 10²³ molecules

The number of calcium atoms in one molecule of CaCO₃ = 1 atom of calcium

Therefore, the number of calcium atoms in 1 mole of CaCO₃ = 1 × 6.022 × 10²³ atoms of calcium = 6.022 × 10²³ atoms of calcium

6.022 × 10²³ atoms of calcium = The number of toms in 1 mole of calcium atoms

Therefore, the number of moles of calcium atom in each mole of calcium carbonate = 1 mole of calcium atoms.

Answer:

1.)Elements

2.)Compound

3.)Subscript

4.)Formulas

Explanation:

Answer:

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Explanation:

Answer:Iron combines with oxygen to produce rust, which is the compound named iron oxide

Explanation:

Explanation:

been defined in such a way. It is defined as the numbers of particles in 12 g of 12C. If it were 24 g instead of 12 g, then the weight of 1 mole of substance would equal 2 times the atomic/molecular mass in grams.

Answer:

Mass = 2.77 g

Explanation:

Given data:

Mass of HCl = 2 g

Mass of CaCl₂ produced = ?

Solution:

Chemical equation:

2HCl + Ca    →     CaCl₂ + H₂

Number of moles of HCl:

Number of moles = mass / molar mass

Number of moles = 2 g/ 36.5 g/mol

Number of moles = 0.05 mol

now we will compare the moles of HCl with CaCl₂.

                   HCl       :         CaCl₂

                     2         :          1

                   0.05     :       1/2×0.05 = 0.025 mol

Mass of CaCl₂:

Mass = number of moles × molar mass

Mass = 0.025 mol × 110.98 g/mol

Mass = 2.77 g

Answer:

6amu

Explanation:

mass=proton+neutron

mass of cl2=2(16+16)=64amu

Answer:

It helps you predict how much of a reactant participates in a chemical reaction

Explanation:

Answer:

101.78 g

Explanation:

We know that density is given by; mass/volume

Mass = ?

Density = 0.789 g/ml

Volume = 129 ml

Mass = volume × density

Mass= 129 ml × 0.789 g/ml

Mass= 101.78 g

Answer:

A... Chemical change?

Explanation:

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Answer:  A. [tex]0.00301J/g^0C[/tex]

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

[tex]Q=m\times c\times \Delta T[/tex]

Q = Heat absorbed  = 4.56 J

m = mass of substance = 123 g

c = specific heat capacity = ?

Change in temperature ,[tex]\Delta T=T_f-T_i=12.32^0C[/tex]

Putting in the values, we get:

[tex]4.56J=123g\times c\times 12.32^0C[/tex]

[tex]c=0.00301J/g^0C[/tex]

The specific heat of a 123 g substance that requires 4.56 J of heat in  order to increase its temperature by 12.32 °C is [tex]0.00301J/g^0C[/tex]

Answer:

I hate to not answer and have you repost this if you could repost it with the choices by clicking the arrow I can figure it out a lot faster and I'll copy and paste to show you that it's right

Explanation:

I'm good with history biology sum math so if you want to do what I asked and reposted I can give you the answers and I will show that they are correct I won't just guess like some people do just to get points cuz I don't care about points I just get on here to help people

Answer: The answer for the blanks is initial appearance and than final appearance.

Explanation:

Answer:

c

Explanation:

I know it's c because I have done the test

Answer:

A

add a coefficient 2 before Fe and a 3 before H2O

Answer:

Option A. Add a coefficient 2 before Fe and a 3 before H2O

Explanation:

Fe₂O₃ + 3H₂ —> Fe + H₂O

The above equation can be balance by as follow:

Fe₂O₃ + 3H₂ —> Fe + H₂O

There are 2 atoms of Fe on the left side and 1 atom on the right side. It can be balance by putting 2 before Fe as shown below:

Fe₂O₃ + 3H₂ —> 2Fe + H₂O

There are 3 atoms of O on the left side and 1 atom on the right side. It can be balance by putting 3 before H₂O as shown below:

Fe₂O₃ + 3H₂ —> 2Fe + 3H₂O

Now the equation is balanced.

Thus, the student should add a coefficient 2 before Fe and a 3 before H2O

Answer:

The mass of 4.5 moles of Cu(NO3)2 is 843.55g

Explanation:

Mass = moles x Molar mass

Mass = 4.50(187.55)

         = 843.97g

Answer:

How likely something is to happen.

Answer:

the blank is on.

Turning on a switch completes a circuit.

Explanation:

Answer:

63.499%

Explanation:

Answer: compounds

Explanation:

Compounds are made of atoms of two or more different types of elements, and they can be chemically combined to create a compound. The compound will have molecules from each of the elements you add in the compound. The answer to the question is compounds.

Answer:

cells?

Explanation: