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3 years ago

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Chemistry

1 answer:

olganol [36]3 years ago

6 0

Answer:

bro number dem

Explanation:

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A gas mixture contains twice as many moles of o2 as n2. addition of 0.200 mol of argon to this mixture increases the pressure fr

pantera1 [17]

Number of moles of oxygen = x

number of moles of nitrogen = y

x = 2y

initial pressure, p1 = 0.8 atm

final pressure, p2 = 1.10 atm

At constant volume and temperature p1 / n1 = p2 / n2

=> p1 / p2 = n1 / n2

n1 = x + y = 2y + y = 3y

n2 = 0.2 + 3y

=> p1 / p2 = 3y / (0.2 + 3y)

=> 0.8 / 1.10 = 3y / (0.2 + 3y)

=> 0.8 (0.2 + 3y) = 1.10 (3y)

0.16 + 2.4y = 3.3y

=> 3.3y - 2.4y = 0.16

=> 0.9y = 0.16

=> y = 0.16 / 0.9

=. x = 2*0.16/0.9 = 0.356

Answer: 0.356 moles O2

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4 years ago

How does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed?

ki77a [65]

Answer:

B. The value of q is positive

Explanation:

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3 years ago

A student is given a solution of phenol red of unknown concentration. Solutions of phenol red are bright pink under basic condit

azamat

The hydrogen ion concentration, [H ], in the solution of phenol red solution of pH 11.20 is 6.3 X $10^{-12}$ moles/litre.

Explanation:

Data given:

basic solution of phenol red is given as it has pH of 11.2

hydrogen ion concentration = ?

the hydrogen ion concentration is calculated by using the following formula:

pH = - $log_{10}$ [ $H^{+}$ ]

Rearranging the equation:

[ $H^{+}$ ] = $\frac{1}{10^{pH} }$

Putting the values in the above equation:

[ $H^{+}$ ] = $\frac{1}{10^{11.2} }$

[ $H^{+}$ ] = 6.3 X $10^{-12}$ moles/litre

The hydrogen ion concentration is very small and the solution of phenol red is basic in nature. The pH of 11.2 also indicates that solution is basic and teh color of the solution is bright pink.

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4 years ago

a neutral atom possesses an atomic number of 13 and an atomic mass of 27. Three electrons ar lost What region are they lost from

motikmotik

Al (1s²2s²2p⁶3s²3p¹) - 3e⁻ → Al³⁺ (1s²2s²2p⁶)

3s²3p¹

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4 years ago

How can human use of natural resources pollute the environment? :(

gladu [14]

Answer:

If a human does an non ecofriendly thing such as litering, it can damage earths atmosphere

Explanation:

i duno

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3 years ago

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