Which chemical formula shows two atoms of iron (Fe) and three atoms of oxygen (O)?

What makes calcium and nitrogen different list two differences

liberstina [14]

Answer:

the difference in electronegativity is so large (2.04) that the bonding electrons spend almost all their time on the nitrogen atom.

Explanation:

Because calcium loses 2 electrons to become Ca2+, and nitrogen gains 3 electrons to become N3−, you need two calcium atoms and three nitrogen atoms in order to form a neutral compound.

6 0

3 years ago

18. Use the activity series to predict whether the following synthesis reaction will occur. Write the chemical equations for the

MAXImum [283]

<u>Answer:</u> The chemical reaction for the synthesis reaction is given below.

<u>Explanation:</u>

Synthesis reaction is defined as a chemical reaction in which two small chemical substances combine together to form a single compound. The general equation for this chemical reaction follows:

$A+B\rightarrow AB$

For the reaction of calcium and oxygen combining together to form calcium oxide, the equation follows:

$2Ca(s)+O_2(g)\rightarrow 2CaO(s)$

By Stoichiometry,

2 moles of calcium element combines together with 1 mole of oxygen gas to produce 2 moles of calcium oxide.

Hence, the chemical equation for the reaction is given above.

8 0

3 years ago

Due Tuesday 09-07-2021 Please help immediately!! I have 10 missing assignments from being absent

jeka57 [31]

Answer:

Go to

On the left, click Missing.

(Optional) To review more details, click an item. View details.

Explanation:

7 0

3 years ago

Read 2 more answers

Determine whether each of the following salts will form a solution that is acidic, basic, or pH-neutral. Drag the appropriate it

Aleks04 [339]

Answer:

AI(NO₃)₃ → Acidic pH < 7

CH₃NH₃CN → Neutral pH = 7

NaCIO → Basic pH > 7

CH₃NH₃CI → Acidic pH < 7

NaNO₃ → Neutral pH = 7

Explanation:

First of all we dissociate the salts:

Al(NO₃)₃ → Al³⁺ + 3NO₃⁻

Nitrate anion comes from the nitric acid which is strong, so the anion is the conjugate weak base. It does not react to water, but the Al is an special case. Aluminum as a cathion comes from the Al(OH)₃ which is a base but this compound can also react as an acid, it is called amphoterous.

Al³⁺ + H₂O ⇄ Al(OH)²⁺ + H⁺

Aluminium cathion reacts to water in order to produce a complex and to give protons to the medium, so the salt is acid.

CH₃NH₃CN → CH₃NH₃⁺ + CN⁻

Both ions come from a weak base and a strong acid, so both ions are the conjugate strong base and acid, respectively. They can make hydrolysis to water so the salt is neutral.

CH₃NH₃⁺ + H₂O ⇄ CH₃NH₂ + H₃O⁺ Ka

CN⁻ + H₂O ⇄ HCN + OH⁻ Kb

NaCIO → Na⁺ + ClO⁻

Sodium cathion, comes from the strong base NaOH so it is does not react to water. It is the conjugate weak acid. Hypochlorite comes from the weak acid, so it can hydrolyse to water.

ClO⁻ + H₂O ⇄ HClO + OH⁻ Kb

Hypochlorous acid is formed giving OH⁻ to medium, so the salt is basic.

CH₃NH₃CI → CH₃NH₃⁺ + Cl⁻

Chloride comes from the strong acid HCl. It does not react to water.

Methylammonium comes from the weak base, methylamine so it can react to water in order to make hydrolysis. The salt will be acidic.

CH₃NH₃⁺ + H₂O ⇄ CH₃NH₂ + H₃O⁺ Ka

NaNO₃ → Na⁺ + NO₃⁻

Both ions come from a strong base and acid, so they are the conjugate base and acid, respectively. As they do not make hydrolisis in water, the salt will be neutral.

5 0

3 years ago

How many moles is 34.4 g of Oxygen gas (O2)?

jasenka [17]

Answer:

n = 1.075 moles

Explanation:

Given that,

Mass of oxygen = 34.4 gram

The molar mass of oxygen gas = 32 g/mol

We need to find the number of moles of oxygen. We know that,

No. of moles = given mass/molar mass

So,

$n=\dfrac{34.4\ g}{32\ g/mol}\\\\=1.075\ mol$

So, there are 1.075 moles in 34.4 g of Oxygen gas.

6 0

3 years ago