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ICE Princess25 [194]
2 years ago
5

Please write down the definitions of elements, compounds, mixtures, homogenous mixtures, and heterogenous mixtures.

Chemistry
2 answers:
Ahat [919]2 years ago
7 0
If it is pure, the substance is either an element or a compound. If a substance can be separated into its elements, it is a compound. If a substance is not chemically pure, it is either a heterogeneous mixture or a homogeneous mixture. If its composition is uniform throughout, it is a homogeneous mixture
MA_775_DIABLO [31]2 years ago
3 0

A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture.

A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture.
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Which describes the molecule below?
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Answer:

Option D. A liquid with three unsaturated fatty acids.

Explanation:

A careful observation of the molecule given in question shows that the molecule is unsaturated as all three fatty acid that make up the compound contain double.

Double is a characteristic property of unsaturated compound.

4 0
3 years ago
Read carefully and choose the correct answer.ill mark brainliest​
Veseljchak [2.6K]

Answer:

Hello shaggy

Explanation:

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5 0
3 years ago
What is created when combustion happens without enough oxygen?
allsm [11]
The answer is d. soot
3 0
3 years ago
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The amount of calcium hydroxide needed to react completely with a 100.0 g of nitric acid
Ierofanga [76]

Answer:

The answer to your question is 58.7 g of Ca(OH)₂

Explanation:

Data

mass of Ca(OH)₂ = ?

mass of HNO₃ = 100 g

Process

1.- Write the balanced chemical reaction

              Ca(OH)₂ + 2HNO₃   ⇒   Ca(NO₃)₂  +  2H₂O

2.- Calculate the molar mass of the reactants

Ca(OH)₂  = 40 + 32 + 2 = 74 g

HNO₃ = 1 + 14 + 48 = 63 g

3.- Use proportions to calculate the mass of Ca(OH)₂

                  74 g of Ca(OH)₂ ----------------- 2(63) g of HNO₃

                    x                        ----------------- 100 g of HNO₃

                          x = (100 x 74) / 2(63)

                          x = 7400 / 126

                         x = 58.7 g

3 0
3 years ago
Nickel-Iron Battery
tatuchka [14]

The answer is: 4.00 mol of Fe(OH)2 is produced.

Balanced chemical reaction:

Fe(s) + 2NiO(OH)(s) + 2H₂O(l) → Fe(OH)₂(s) + 2Ni(OH)₂(aq).

n(Fe) = 5.00 mol; amount of iron.

n(NiO(OH)) = 8.00 mol; amount of nickel oxide hydroxide, limiting reactant.

From chemical reaction: n(NiO(OH)) : n(Fe(OH)₂) = 2 : 1.

n(Fe(OH)₂) = 8 mol ÷ 2.

n(Fe(OH)₂) = 4 mol; amount of iron(II) hydroxide.

8 0
3 years ago
Read 2 more answers
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