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4 years ago

Choose all the answers that apply MORE THAN ONE ANSWER. Salt is an ionic compound. It _____.

Chemistry

2 answers:

Anuta_ua [19.1K]4 years ago

7 0

dissolves easily in water

has a high boiling point

has a high melting point

conducts electricity when melted

Explanation:

Salts are ionic compounds. Ionic compounds are formed when two atoms exchange their valence electrons. One atom gains and the other atom loses.

Generally, ionic compounds have the following properties:

They are usually hard solids with high melting points or liquids with high boiling points.
They are soluble in water and insoluble in non-polar solvents. This is conforms with the solubility rule that like dissolve like.
In aqueous solution or molten form, ionic compounds conducts electricity.
They take part in very fast chemical reactions.

Learn more:

Ionic compounds brainly.com/question/6071838

#learnwithBrainly

iris [78.8K]4 years ago

6 0

dissolves easily in water

has a high boiling point

has a high melting point

conducts electricity when melted

Hope this helps:]

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The reaction of Cr2O3 with silicon metal at high temperatures will make chromium metal. 2CrO3(s) + 3Si(s)----> 4Cr(l) + 3SiO2

nalin [4]

Answer: 51.45 grams of excess reagent is left after the completion of reaction.

Explanation: For the calculation of moles, we use the formula:

$Moles=\frac{\text{Given mass}}{\text{Molar mass}}$ ....(1)

For Si

Given mass = 92 grams

Molar mass = 28g/mol

Putting values in equation 1, we get:

$Moles=\frac{92g}{28g/mol}=3.285moles$

For $Cr_2O_3$

Given mass = 112 grams

Molar mass = 116g/mol

Putting values in equation 1, we get:

$Moles=\frac{112g}{116g/mol}=0.965moles$

The reaction follows:

$2Cr_2O_3(s)+3Si(s)\rightarrow 4Cr(l)+3SiO_2(s)$

By Stoichiometry,

2 moles of $Cr_2O_3$ reacts with 3 moles of silicon

So, 0.965 moles of $Cr_2O_3$ reacts with = $\frac{3}{2}\times 0.965$ = 1.4475 moles of Silicon.

As, the moles of silicon is more than the required amount and is present in excess.

So, the excess reagent for the reaction is Silicon.

Moles of silicon remained after reaction = 3.285 - 1.4475 = 1.8375 moles

To calculate the amount of Silicon left in excess is calculated by using equation 1:

$1.8375=\frac{\text{Given mass}}{28}$

Amount of Silicon in excess will be 51.45 grams.

5 0

4 years ago

Explain why chlorine does not react with aqueous sodium fluorine

Vlada [557]

Answer:

because the two are opposite compounds.

Explanation:

6 0

3 years ago

Why is large-scale nuclear fission a rare phenomenon on Earth?

stellarik [79]

Answer:

Large-scale nuclear is fission a rare phenomenon on Earth because

atoms that undergo fission aren't concentrated enough to sustain a chain reaction.

<h2>Hope it helps you.</h2>

4 0

3 years ago

Read 2 more answers

The temperature of 100. g of water at 25.0C increases to 31.9C. How much energy was added to the water? The specific heat of wat

Yakvenalex [24]

Answer:

2890j

Explanation:

5 0

3 years ago

1. How many moles of Cu are in 1.48 × 1025 Cu atoms?

morpeh [17]

1 mole ------------- 6.02 x 10²³ atoms
( moles Cu) ------- 1.48 x 10²⁵ atoms

moles Cu = ( 1.48 x 10²⁵ ) x 1 / 6.02 x 10²³

moles Cu = 1.48 x 10²⁵ / 6.02 x 10²³

=<span> 24.58 moles of Cu</span>

<span>hope this helps!</span>

6 0

4 years ago