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2. A sample of table sugar (sucrose, C12H22O11) has a mass of 1.202 g.

Snezhnost [94]

Explanation:

Given mass of sugar = 1.202 g

Molar mass of the sugar , $C_{12}H_{22}O_{11}$ = 342.29 g/mol

a) Number of moles of sugar

$\text{number of moles}=\frac{\text{given mass of sugar}}{\text{molar mass of sugar}}=\frac{1.202 g}{342.29g/mol}=0.0035 mol$

Number of moles of sugar in 1.202 grams is 0.0035 moles

b)Moles of each element in $C_{12}H_{22}O_{11}$

In a molecular formula of sugar there are 12 carbon, 22 hydrogen and 11 oxygen atoms

Moles of an element in molecule =

number of atoms of that element in a molecular formula × number of moles of compound

Moles of carbon = 12 × 0.0035 = 0.042 moles

Similarly

Moles of hydrogen = 22 × 0.0035 = 0.077 moles

Moles of oxygen =11 × 0.0035 = 0.0385 moles

c) Number of atoms of each type in $C_{12}H_{22}O_{11}$

$\text{Number of atoms}=\text{number of moles of that atom in a molecular formula}\times \text{Avogadro number}$

Number of carbon atoms = $0.042 mole\times 6.022 \times 10^{23}=2.52\times 10^{22} atoms$

Number of hydrogen = $0.077mole\times 6.022 \times 10^{23}=4.63\times 10^{22} atoms$

Number of oxygen atoms = $0.0385 mole\times 6.022 \times 10^{23}=2.31\times 10^{22} atoms$

7 0

3 years ago

Read 2 more answers

Explain what will happen to a rbc placed in a solution of 99.3% water and .7% salt

MrRissso [65]

It will get weeker and loose carbonation as well

5 0

3 years ago

What is the volume of 7.50 x 10^24 molecules of NH3 at STP?

Allushta [10]

27.9L

Explanation:

Given parameters:

Number of molecules = 7.5 x 10²⁴molecules

Condition = STP

Unknown:

Volume of gas = ?

Solution;

The volume of gas at STP is expressed below;

Volume of gas = number of moles x 22.4

Number of moles = $\frac{Number of molecules }{6.02 x 10^{23} }$

Now if we can obtain the value of the number of moles from the expression above, we can plug it back into the equation of the volume of gas at STP;

Number of moles of NH₃ = $\frac{[tex]7.5 x 10^{24}$ }{6.02 x 10^{23} }[/tex]

Number of moles of NH₃ = 12.5moles

Volume of gas = 12.5 x 22.4 = 27.9L

learn more:

Volume of gas at STP brainly.com/question/7795301

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3 0

3 years ago

N a football game, two players tackle each other so hard that they both fly in opposite directions after they hit each other. �W

evablogger [386]

Answer:

Newton's Third Law

Explanation:

Newton's Third Law stipulates that for every action there is an equal and opposite reaction.

So when the two players are tackling they exert a force on each other.

If player 1 tackles (exerts a force) player 2, player 2 will exert an equal and opposite reaction on player 1 as stated in Newton's Third Law.

Therefore when they tackle each other so hard they both experience reaction forces so powerful that they fly in opposite directions.

Thus this is an example of the Newton's Third Law.

4 0

3 years ago

Select the correct answer.

jeyben [28]

Answer:

A. Second

Explanation:

The S.I unit of time is in Seconds.

The S. I unit is known as the metric system is the most commonly used system of reporting scientific measurements in the world today. Other units are the imperial units.

It is the international system of unit used in almost all countries. The seven basic SI units are:

Quantities Units

Length meters(m)
Time seconds(s)
Amount of substance moles(mol)
Mass kilograms(kg)
Luminous intensity candela(cd)
Temperature kelvin(K)
Electric current ampere(A)

The SI unit of time which measures the duration of an activity or event is therefore given as seconds(s)

3 0

4 years ago