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3 years ago

A gas exerts a pressure of 2.5 ATM at a temperature

Chemistry

1 answer:

tino4ka555 [31]3 years ago

5 0

(P1/T1)=(P2/T2)
(1atml/273K)=(2.5atm/x)
2.5/(1/273)=682.5K

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Which of the following statements is true about what happens during a chemical reaction?

tiny-mole [99]

Answer: The correct option is A.

Explanation: In a chemical reaction, reactants react to form a number of products.

For the formation of products, the bonds of the individual reactants must be broken and the bonds of the products must be formed.

For example: Formation of water from hydrogen gas and oxygen gas. Reaction follows:

$2H_2(g)+O_2(g)\rightarrow 2H_2O(l)$

The Bonds of hydrogen and oxygen molecule are broken and new bonds between hydrogen and oxygen atoms are formed to give water molecule.

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2 years ago

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A wave is moving toward the shore If its frequency is 2.7 hertz, what is its wavelength? What would the correct number of signif

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Answer:

λ = 1.1×10⁸ m

Explanation:

Given data:

Frequency of wave = 2.7 Hz

Wavelength of wave = ?

Solution:

Formula:

Speed of wave = frequency × wavelength

Speed of wave = 3×10⁸ m/s

now we will put the values in formula.

3×10⁸ m/s = 2.7 s⁻¹ × λ

λ = 3×10⁸ m/s /2.7 s⁻¹

λ = 1.1×10⁸ m

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2 years ago

If a class has 120 students and the professor wants to purchase two cookies per student (or 2 coo/stu) he or she will need to bu

klio [65]

60 just divide 120 by 2

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2 years ago

What is the molar concentration of hydronium ions in a sample of a soft drink that has a ph of 4?

hammer [34]

[ $H^{+}$ ] value of soft drink is 0.0001mol/l when given pH is 4.

Given:

pH = 4

Needs to find: [ $H^{+}$ ]

Formula to find: pH=−log $_{10}$ [ $H^{+}$ ]

We can put the values of pH in above formula as,

pH=−log $_{10}$ [ $H^{+}$ ]

4 =−log $_{10}$ [ $H^{+}$ ]

To calculate hydonium ion concentration, formula is as follows;

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

[ $H^{+}$ ] = $10^{-4}$ = 0.0001mol/l

[ $H^{+}$ ] value of soft drink is 0.0001mol/l

Learn more about pH here:

brainly.com/question/2288405

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1 year ago

You are given an unknown gaseous binary compound (that is, a compound consisting of two different elements). when 10.0 g of the

Luda [366]

Answer is: a possible identity for the unknown compound is C₃H₈.

m(binary compound) = 10.0 g.

m(H₂O) = 16.3 g; mass of water.

M(O₂) = 32 g/mol; molar mass of oxygen.

M(binary compound) = 1.38 · 32 g/mol.

M(binary compound) = 44.16 g/mol.

n(binary compound) = 10 g ÷ 44.16 g/mol.

n(binary compound) = 0.225 mol; amount of substance.

n(H₂O) = 16.3 g ÷ 18 g/mol.

n(H₂O) = 0.9 mol; amount of water.

m(H₂O) : n(binary compound) = 0.9 mol ÷ 0.225 mol.

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Unknown cpmpound has 4 times more hydrogen than water, it has 8 hydrogen atoms.

Second element in compound is carbon:

M(X) = 44.16 g/mol - 8 · 1.01 g/mol.

M(X) = 36.08 g/mol ÷ 3.

M(C) = 12.01 g/mol.

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3 years ago