2 years ago

Which answer best describes an alpha particle

Chemistry

1 answer:

scZoUnD [109]2 years ago

4 0

A positively charged nucleus with two protons and two neutrons hope this helps :)

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

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<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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What color would you expect a weak base to turn the paper?

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Answer:

Blue litmus paper paper turns red under acidic conditions. Red litmus paper turns blue under basic or alkaline conditions. If you're using a universal indicator, the weak base should turn those blue.

Explanation:

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Roland is measuring a physical property of an object. He records the measurement:

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Answer:

The correct answer is density. See the explanation below, please.

Explanation:

Roland measured density, which is a property that relates mass to volume, having units for example: grams / cm3

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Solids, liquids, and gases are three common states of matter. Which of these states of matter can flow?

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