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2 years ago

Identify the missing coefficient in the balanced equation and classify the type of reaction. Al2(CO3)3 ⟶ Al2O3 + ___CO2

Chemistry

2 answers:

ludmilkaskok [199]2 years ago

5 0

I think the answer is 1; Decomposition.

PSYCHO15rus [73]2 years ago

3 0

Al2(CO3)3 -> Al2CO3 -> 3CO2

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In some developing nations, the percentage of animal protein from fish in the diet can be as high as _____.

Makovka662 [10]

Answer:

20%

Explanation:

The fish consumption has had lot of variations in the past few centuries, most noticeably in the last century. Initially it was the richer countries that had population which was consuming the most animal protein from fish in the world, while the developing nations had less. Things have changed though, especially during the 1990's, when the developing nations experienced a rapid increase in the consumption of fish. This was largely due to the growing standard and the availability of fish, so in some of the developing nations the percentage of animal protein from fish reached around 20%.

5 0

2 years ago

Lead has a density of 11.3 g/mL. If you have 105 grams of lead,

Elza [17]

Answer:

<h2>Volume = 9.29 mL</h2>

Explanation:

Density of a substance can be found by using the formula

$Density( \rho) = \frac{mass}{volume}$

From the question

Density = 11.3 g/mL

mass = 105 g

Substitute the values into the above formula and solve for the volume

That's

$11.3 = \frac{105}{v}$

Cross multiply

11.3v = 105

Divide both sides by 11.3

$v = \frac{105}{11.3}$

v = 9.29203

We have the final answer as

<h3>Volume = 9.29 mL</h3>

Hope this helps you

6 0

2 years ago

What is the pH of a solution that has a [OH-] of 5.08x10^-5 M

sattari [20]

Answer:

The pH of a solution that has a [OH-] of 5.08x10^-5 M is 5

Explanation:

just took the test

onedg2020

3 0

1 year ago

According to valence bond theory, the minimum of the potential energy curve describing the interaction of H atoms in H2 correspo

tatuchka [14]

The interaction between the two atoms of H in H2 with the lower energy corresponds to a covalent bond between hydrogen's.

When the two atoms of H form a bond, they are overlapping the individual orbitals to form a new one. Every hydrogen has 1 electron which sits in a 1s orbital and then form one molecular orbital. The energy of H2 is lower than individual hydrogens because the electrostatic interaction between them.

7 0

2 years ago

What is the percent yield of a reaction in which 3.8 moles of iron metal react with excess sulfur to produce 230 grams of iron(I

KonstantinChe [14]

Answer:

The answer to your question is 68.8%

Explanation:

Data

Iron = 3.8 moles

Sulfur = excess

FeS = 230 g

Molecular weight FeS = 88 g

Process

Reaction

Fe + S ⇒ FeS

1.- Convert the number of moles of Iron to grams

56 g of Iron -------------- 1 mol

x -------------- 3.8 moles

x = (3.8 x 56) / 1

x = 212.8 g of Iron

2.- Calculate the theoretical production of FeS

56 g of Iron ---------------- 88 g of FeS

212.8 g of iron ----------- x

x = (212.8 x 88) / 56

x = 334.4 g of FeS

3.- Calculate the percent yield

% yield = $\frac{230}{334.4} x 100$

% yield = 68.8

7 0

2 years ago

Read 2 more answers