What is true about a chemical reaction

2 answers:

4 0

A chemical equation summarizes a reaction. ... All the atoms present at the start of a reaction are present at the end. true.

MatroZZZ [7]3 years ago

3 0

Answer: energy is transferred, but it can go to the products or the reactants.

Explanation: in a chemical reaction, the atoms and molecules that interact with each other are called reactants.

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Read 2 more answers

Write ionic equations for the following:<br> HCl(aq) + KOH(aq) → KCl(aq) + H2O(l)

vodomira [7]

Answer:

HCl(aq) + KOH(aq) ===> H2O(l) + KCl(aq)

Note the stoichiometry of the balanced equations shows us that HCl and KOH react in a 1:1 mole ratio. So, let us find moles of HCl and moles of KOH that are present:

moles HCl = 250.0 ml x 1 L/1000 ml x 0.25 mol/L = 0.06250 moles HCl

moles KOH = 200.0 ml x 1 L/1000 ml x 0.40 mol/L = 0.0800 moles KOH

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2 years ago

A gas has a volume of 4 L at a temperature of -33°C. if the temperature is increased to 27°C in the pressure remains constant wh

vitfil [10]

Answer:

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

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3 years ago

What is the wavelength of a 2.80 Hz wave?

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I attached the working and the answer to the question below.

Please note that C = speed of light, ν = frequency, λ= wavelength

<span> The wavelength of a 2.80 Hz wave is 1.07 </span>× 10¹⁰

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