All categories

3 years ago

How many moles of potassium bromide (KBr) are in 97.569 grams? *

Chemistry

1 answer:

Tasya [4]3 years ago

3 0

Answer:

nonofur bisnuse

Explanation:

fjiajrooooooooooooooooooooa;

You might be interested in

8. If 0.795 moles of ammonia gas occupies 42.5 L at 670 torr, what is the Celsius temperature?

maksim [4K]

Answer: The temperature in degree Celsius is 301.31°C

Explanation:

To calculate the temperature, we use the equation given by ideal gas, which is:

$PV=nRT$

P = pressure of the gas = 670 torr = 0.882 atm (Conversion factor: 1 atm = 760 torr)

V = volume of gas = 42.5 L

n = number of moles of gas = 0.795 mol

R = Gas constant = $0.0821\text{ L atm }mol^{-1}K^{-1}$

T = temperature of gas

Putting values in above equation, we get:

$0.882atm\times 42.5L=0.795mol\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times T\\\\T=574.31K$

Converting the temperature from kelvins to degree Celsius, by using the conversion factor:

$T(K)=T(^oC)+273$

$574.31=T(^oC)+273\\T(^oC)=301.31^oC$

Hence, the temperature in degree Celsius is 301.31°C

6 0

3 years ago

Please help Me Answer this

SOVA2 [1]

Objects that produce heat are coal, liquid fuels, gasoline, oil, and gaseous fuels

8 0

3 years ago

Read 2 more answers

A gas system has an unknown pressure and an initial temperature of 299K. When the temperature is increased to 620 K the pressure

const2013 [10]

Answer:

3.75 atm

Explanation:

Volume remains constant, so we can use Gay-Lussac’s Law.

p₁/T₁ = p₂/T₂ Multiply both sides by T₁

p₁ = p₂ × T₁/T₂

p₁ = ?; T₁ = 299 K

p₂ = 7.77 atm; T₂ = 620 K Insert the values

p₁ = 7.77 × 299/620 Do the operations

p₁ = 3.75 atm

3 0

3 years ago

Determine the volume of distilled water that should be added to 20.0 mL of 12.0 M HCl(aq) in order to prepare a 0.500 M HCl(aq)

BARSIC [14]

Answer:

$V_{H_2O}=460 mL$

Explanation:

Hello!

In this case, in a dilution process, water is added to a solute in order to decrease its concentration but increase the volume of the solution. It means that if we have 20.0 mL of a 12.0-M solution of HCl and we want a 0.500-M solution, we need to apply the following formula considering that the moles remain unchanged:

$M_1V_1=M_2V_2$

Thus, solving for the final volume is:

$V_2=\frac{M_1V_1}{M_2}$

So plugging in the values we obtain:

$V_2=\frac{12.0M*20.0mL}{0.500M}\\\\V_2=480 mL$

Now, since the initial volume of acid was 20.0 mL and the final volume is 480 mL, the added volume of distilled water is:

$V_{H_2O}=480-20=460 mL$

Best regards!

8 0

3 years ago

What is the hybridization of the central atom in CO2? Hybridization = What are the approximate bond angles in this substance? Bo

const2013 [10]

Answer:

Explanation:

Hybridization is the combination of atomic orbitals to yield equivalent hybrid orbitals of appropriate energy which can participate in bonding.

In every compound there is a central atom. The central atom is usually the least electronegative atom in the molecule. In this case the least electronegative atom in the molecule is carbon.

The bond between carbon and oxygen in CO2 is intermittent between a pure double and a pure triple bond. Hence, carbon is sp hybridized.

7 0

3 years ago