2 years ago

Where is absolute zero on the three temperature scales?

Chemistry

1 answer:

xenn [34]2 years ago

5 0

In kelvin, absolute zero is 0. In fahrenheit, it is -459.67. In celsius it is -273.15.

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Reil [10]

Answer:

12.044 x 10^23 atoms Na

Explanation:

1 mol Na has 6.022 x 10^23 atoms of Na

2 moles Na have 2 x NA = 2 x 6.022 x10^23 atoms Na

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2 years ago

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If 3.0 g of NH3 reacts with 5.0 g of HCl, what is the limiting reactant?

ELEN [110]

<h2>Answer:HCl</h2>

Explanation:

$\text{number of moles}=\frac{\text{given mass}}{\text{molar mass}}$

For $NH_{3},$

$\text{given mass}=3g$

$\text{molar mass}=14+3=17g$

$n_{NH_{3}}=\frac{3}{17}=0.176$

For $HCl,$

$\text{given mass}=5g$

$\text{molar mass}=1+35.5=36.5g$

$n_{HCl}=\frac{5}{36.5}=0.136$

The reaction between $NH_{3}$ and $HCl$ is

$NH_{3}+HCl$ → $NH_{4}Cl$

So,one mole of $NH_{3}$ requires one mole of $HCl$

$0.176$ moles of $NH_{3}$ requires $0.176$ moles of $HCl$

But there are only $0.136$ moles of $HCl$ available.

$HCl$ will be consumed first.

So, $HCl$ is the limiting reagent.

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2 years ago

Calcium carbide reacts with water to produce acetylene gas according to the following equation: CaC2(s) + 2H2O(l)C2H2(g) + Ca(OH

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Answer:

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Answer:

should be D

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