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sweet-ann [11.9K]
3 years ago
13

Which wave can travel in both empty space and matter?

Chemistry
2 answers:
vovangra [49]3 years ago
7 0
I believe Choice B is the answer.
igomit [66]3 years ago
6 0

Answer:

The answer is A radio

Explanation:

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What is molar mass......?
Savatey [412]

In chemistry, the molar mass M is a physical property defined as the mass of a given substance (chemical element or chemical compound) divided by its amount of substance. The base SI unit for molar mass is kg/mol. However, for historical reasons, molar masses are almost always expressed in g/mol.

Hope this helped!

Good luck :p

~Emmy <3

4 0
3 years ago
Read 2 more answers
What happens to some of the electrons in an atom when the atom is heated
oksano4ka [1.4K]

Answer:

When the electrons in the atom are excited, for example by being heated, the additional energy pushes the electrons to higher energy orbitals. When the electrons fall back down and leave the excited state, energy is re-emitted in the form of a photon

Explanation:

7 0
3 years ago
When gaseous F2 and solid I2 are heated to high temperatures, the I2 sublimes and gaseous iodine heptafluoride forms. If 350. to
lilavasa [31]

Answer:

P_{I2}=0.033atm

Explanation:

Hi, the first step is to calculate how much F2 there is in the container:

<u>Fluorine can be considered as an ideal gas</u> (given that is non-polar and has a small molecule). Using the ideal gas formula:

n=\frac{V*P}{T*R}

Where:

P=350 torr * \frac{1 atm}{760 torr}=0.46atm

T=250K

V=2.5 L

R=0.082 \frac{atm*L}{mol*K}

n=\frac{2.5L*0.46atm}{250K*0.082 \frac{atm*L}{mol*K}}

n=0.056 mol

Now, the mols of iodine:

n_{I2}=\frac{2.5g}{253.8 g/mol}

n_{I2}=9.85*10^{-3}mol

<u>The chemical reaction described is the following</u>:

I_2(g) + 7 F_2(g) \longrightarrow 2 IF_7(g)

In this case, the limitant reactant is the fluorine:

1) The 0.056 mol of F2 gives 8*10^{-3} mol of IF_7 and consumes 8*10^{-3} mol of I2.

2) At the end, in the conteiner we have:

8*10^{-3} mol of IF_7

0 mol of F_2

9.85*10^{-3}-8*10^{-3}=1.85*10^{-3} mol of I_2

In total: 9.85*10^{-3}mol .All in 2.5 L at 550 K

<u>The final pressure</u>:

P=\frac{T*R*n}{V}

P=\frac{550K*0.082 \frac{atm*L}{mol*K}*9.85*10^{-3}mol}{2.5L}

P=0.176 atm

The partial pressure:

P_{I2}=0.176atm*\frac{1.85*10^{-3} mol (I2)}{9.85*10^{-3} mol (total)}

P_{I2}=0.033atm

<em>Note: this partial pressure is calculated by the Dlaton's principle</em>

8 0
3 years ago
N2O5(g)→NO3(g)+NO2(g) Time (s) [N2O5] (M) 0 1.000 25 0.822 50 0.677 75 0.557 100 0.458 125 0.377 150 0.310 175 0.255 200 0.210 D
sashaice [31]

Answer:

The order of the reaction is 1.

Explanation:

N_2O_5(g)\rightarrow NO_3(g)+NO_2(g)

The rate law of the reaction ;

R=k[N_2O_5]^x

The rate of the reaction from T = 0 s to 25 s, [N_2O_5]=1.000 M to [N_2O_5]=0.822 M respectively.

R=-\frac{0.822 M-1.000 M}{25s-0 s}=0.00712 M/s

0.00712 M/s=k[0.822 M]^x ..[1]

The rate of the reaction from T = 25 s to 50 s, [N_2O_5]=0.822 M to [N_2O_5]=0.677 M respectively.

R=-\frac{0.677 M-0.822 M}{50s-25 s}=0.0058 M/s

0.00646 M/s=k[0.677 M]^x ..[2]

[1] ÷ [2]

\frac{0.00712 M/s}{0.0058 M/s}=\frac{k[0.822 M]^x}{k[0.677 M]^x}

Solving for x:

x = 1.05 ≈ 1

The rate law of the reaction ;

R=k[N_2O_5]^1

The order of the reaction is 1.

5 0
4 years ago
Noah does a experiment to determine how many people can fit in his room.he finds that two people can fit into the first square f
patriot [66]
Thirty two people can fit in the roim
8 0
3 years ago
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