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3 years ago

Write the balanced chemical equations of each reaction:

Chemistry

1 answer:

Darya [45]3 years ago

3 0

Answer:

A. HBr + KHCO3 >>> H20 + CO2 + KBr

B. 3SnO + F3N >>> 3F2Sn + N2O3

C. CH4 + O2 >>> CO2 + H2O

D. AlPO4 + 3LiNO3 >>> Al(NO3)3 + Li3PO4

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if ice, water, and steam are all made if H2O molecules, then what makes them so different from each other?

Nimfa-mama [501]

The temperature of their surroundings

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3 years ago

If He gas has an average kinetic energy of 4310 J/mol under certain conditions, what is the root mean square speed of O2 gas mol

Free_Kalibri [48]

Answer:

The root mean square speed of O2 gas molecules is

519.01 m/s

Explanation:

The root mean square velocity :

$v_{rms}=\sqrt{\frac{3RT}{M}}$

$K.E_{avg}=\frac{3}{2}RT$

$K.E =\frac{1}{2}mv_{rms}^{2}$

Molar mass , M

For He = 4 g/mol

For O2 = 2 x 16 = 32 g/mol

O2 = 32/1000 = 0.032 Kg/mol

First calculate the temperature at which the K.E of He is 4310J/mol

K.E of He =

$K.E_{avg}=\frac{3}{2}RT$

$T=\frac{2(K.E)}{3(R)}$

K.E of He = 4310 J/mol

$T=\frac{2(4310J/mol)}{3(8.314J/Kmol)}$

$T=345.60K$

Now , Use Vrms to calculate the velocity of O2

$v_{rms}=\sqrt{\frac{3(8.314J/Kmol)(345.60K)}{0.032Kg/mol}}$

$v_{rms}=\sqrt{\frac{8619.9552}{0.032}}$

$v_{rms}=\sqrt{26935.001}$

$v_{rms}=519.01m/s$

6 0

4 years ago

What pressure is exerted by 0.750 mol of a gas at 0 °C and a volume of 5

kow [346]

Answer: 3.4 atm

Explanation:

Given that:

Volume of gas V = 5L

(since 1 liter = 1dm3

5L = 5dm3)

Temperature T = 0°C

Convert Celsius to Kelvin

(0°C + 273 = 273K)

Pressure P = ?

Number of moles of gas n = 0.75 moles

Note that Molar gas constant R is a constant with a value of 0.0821 atm dm3 K-1 mol-1

Then, apply ideal gas equation

pV = nRT

p x 5dm3 = 0.75 moles x (0.0821 atm dm3 K-1 mol-1 x 273K)

p x 5dm3 = 16.8 atm dm3

p = (16.8 atm dm3 / 5dm3)

p = 3.4 atm

Thus, a pressure of 3.4 atm is exerted by the gas.

7 0

3 years ago

Does all Newton's laws work together

9966 [12]

I believe so ya.....

6 0

3 years ago

Which TWO of the following options are TRUE about atomic mass and mass number?

Citrus2011 [14]

Answer:

E - Atomic mass is calculated by weighted atomic average using all the isotope data available.

G - Mass number is equal to the sum of protons and electrons in an atom.

Explanation:

Take an element

$\\ \bull\sf\longmapsto _{25}Mg^{12}$

Mass no is 25 and atomic no is 12.

7 0

3 years ago