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3 years ago

What kind of energy transformation happens when a boy uses energy from a sandwich to run the race

1 answer:

3 0

First when a person began to digest the food it becomes a chemical energy. The chemical energy is converted into a kinetic energy. As the body gets energy the kinetic is converted into a mechanical energy.

So here the sandwich is the food I hope it is accurate and helpful:)

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A 250 cm^3 solution containing 1,46 g of sodium chloride is added to an excess of silver nitrate solution. The reaction is given

faust18 [17]

Answer:

The mass of the precipitate that AgCl is 3.5803 g.

Explanation:

a) To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

We are given:

Mass of solute (NaCl) = 1.46 g

Molar mass of sulfuric acid = 58.5 g/mol

Volume of solution = $250 cm^3 =250 mL$

$1 cm^3= 1 ml$

Putting values in above equation, we get:

$\text{Molarity of solution}=\frac{1.46g\times 1000}{58.5g/mol\times 250}\\\\\text{Molarity of solution}=0.09982 M$

0.09982 M is the concentration of the sodium chloride solution.

b) $NaCl (aq)+AgNO_3 (aq)\rightarrow AgCI(s)+NaNO_3(aq)$

Moles of NaCl = $\frac{1.46 g}{58.5 g/mol}=0.02495 mol$

according to reaction 1 mol of NaCl gives 1 mol of AgCl.

Then 0.02495 moles of NaCl will give:

$\frac{1}{1}\times 0.02495 mol=0.02495 mol$ of AgCl

Mass of 0.02495 moles of AgCl:

$0.02495 mol\times 143.5 g/mol=3.5803 g$

The mass of the precipitate that AgCl is 3.5803 g.

3 0

3 years ago

Pls help me on this I have 5 minutes left to submit

pantera1 [17]

Heterogenous mixture mean unsimilar substances .

Chicken noodle soyp.
salt water
propane.

An element is a substance made of only one type of atoms

Example-Al,S

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2 years ago

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What properties you can determine for carbon and calcium based on their respective locations on the periodic table

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Answer:

Carbon is non metal because it is found in the right side of the periodic table while calcium is metal because it is found in the left side of the periodic table.

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3 years ago

__________ often cause overactive eye movement. A. Stimulants B. Depressants C. Barbiturates D. None of the above

jeka57 [31]

<u>Stimulants </u> often cause overactive eye movement

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What type of radiation is emitted when chromium-51 decays into manganese-51? Show the nuclear equation that leads you to this an

Anastasy [175]

It's a beta decay
24Cr51 --> 25Mn51 + -1eo

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What kind of energy transformation happens when a boy uses energy from a sandwich to run the race​

What kind of energy transformation happens when a boy uses energy from a sandwich to run the race