All categories

3 years ago

Please help,i really need this!!!

Chemistry

2 answers:

lana [24]3 years ago

6 0

Answer: Option (A) is the correct answer.

Explanation:

When calcium reacts with potassium chloride then it results in the formation of calcium oxide and potassium ions.

The given equation is as follows.

$Ca(s) + KCl \rightarrow CaCl_{2}(s) + K^{+}$

Number of atoms on reactant side are as follows.

Ca = 1
K = 1
Cl = 1

Number of atoms on product side are as follows.

Ca = 1
K = 1
Cl = 2

To balance the given equation, multiply KCl by 2 on the reactant side and multiply potassium ions by 2 on product side. Therefore, balanced chemical equation will be as follows.

$Ca(s) + 2KCl \rightarrow CaCl_{2}(s) + 2K^{+}$

Makovka662 [10]3 years ago

5 0

A because KCL 2 and K + CL cancel out and Both of the Ca cancel each other out

You might be interested in

Iron is obtained commercially by the reaction of hematite (Fe2O3) with carbon monoxide. How many grams of iron are produced if 1

kherson [118]

<span>CO is the limiting reactant
( 25.0 x 3 = 75 moles of CO are required)

Moles Fe = 30.0 x 2 / 3 = 20.0
mass Fe = 20.0 x 55.847 g/mol=1117 g </span><span>

I'm just saying</span>

5 0

3 years ago

You work for a cutlery manufacturer who wants to electrolytically precipitate 0.500 g of silver onto each piece of a batch of 25

ICE Princess25 [194]

Answer:

373.1 mL of AgCN (aq) must be poured into your electrolysis vat to ensure you have sufficient Ag to plate all of the forks.

Explanation:

Mass of silver to be precipitated on ecah spoon = 0.500 g

Number of silver spoons = 250

Total mass of silver = 250 × 0.500 g = 125 g

$Moles (n)=Molarity(M)\times Volume (L)$

Moles of AgCN = n = $\frac{125 g}{134 g/mol}=0.9328 mol$

Volume of AgCN solution =V

Molarity of the AgCN = 2.50 M

$V=\frac{0.9328 mol}{2.50 M}=0.3731 L=373.1 mL$

(1 L = 1000 mL)

373.1 mL of AgCN (aq) must be poured into your electrolysis vat to ensure you have sufficient Ag to plate all of the forks.

6 0

3 years ago

The compound before the arrow are called blank and the compound after the arrow are called blank

Norma-Jean [14]

First one is reactants and then second one is products

8 0

3 years ago

What are the oxidation numbers of the atoms in this reaction?

ipn [44]

A, B and D should be the ones you should check

8 0

3 years ago

In one to two sentences, describe an experiment that would show that intramolecular forces (attractions between atoms within mol

Tatiana [17]

An experiment that would show that intramolecular forces are stronger than intermolecular forces will be heating a block of ice in a sealed container then allowing it to change to steam.

Intramolecular forces are the forces of attraction that hold atoms together within a molecule. Intramolecular forces require a high amount of energy to splits atoms or molecules in a chemical bonding.

Intermolecular forces are weaker forces of attraction that occur between molecules. They require lesser energy to splits molecules compared to intramolecular forces.

An experiment that would show that intramolecular forces are stronger than intermolecular forces will be heating a block of ice in a sealed container then allowing it to change to steam.

In the process, the energy required to change the state from ice to steam water is more than intermolecular forces.

Thus, we can conclude that this experiment shows that the intramolecular forces are stronger than the intermolecular forces.

Learn more about Intramolecular forces here:

brainly.com/question/13588164

3 0

2 years ago