The study of how organisms interact with one another and with their environment

Chemistry

1 answer:

Brums [2.3K]3 years ago

4 0

The study of how organisms interact with one another and with their environment is ecology

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The volume of a sample of gas (4.32 g) was 752 mL at 1.98 ATM and 62°C. The gas is

gogolik [260]

Answer:

Bromine

Explanation:

To identify the gas, you first need to find the moles of the gas. You can do this using the Ideal Gas Law:

PV = nRT

In this equation,

-----> P = pressure (atm)

-----> V = volume (L)

-----> n = moles

-----> R = Ideal Gas Constant (0.08206 atm*L/mol *K)

-----> T = temperature (K)

After converting mL to L and Celsius to Kelvin, you can plug the values into the equation and simplify to find the moles.

P = 1.98 atm R = 0.08206 atm*L/mol *K

V = 752 mL / 1,000 = 0.752 L T = 62 °C + 273.15 = 335.15 K

n = ? moles

PV = nRT

(1.98 atm)(0.752 L) = n(0.08206 atm*L/mol *K)(335.15 K)

1.48896 = n(27.5024)

0.0541 = n

You can identify the gas by determining the molar mass of the gas, which is specific to each element. The molar mass exists as a ratio that compares the mass per 1 mole.

Molar Mass = mass / moles

Molar Mass = 4.32 g / 0.0541 moles

Molar Mass = 79.8 g/mol

This molar mass is closest to the molar mass of bromine (79.904 g/mol).

6 0

2 years ago

How many moles of H2 would be required to produce 37.0 moles of water?

svp [43]

Hii there !

The reaction accompanying production of water in this case would be -

$\green{ \underline { \boxed{ \sf{H_2+ \frac{1}{2}O_2\longrightarrow H_2O}}}}$

Thus ,by observing the reaction, we can conclude that 1 mole of Hydrogen (H $_2$ )react with 1/2 mole of oxygen(O $_2$ )to produce 1 mole of water (H $_2$ O)