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3 years ago

I’ve been up all night doin chemistry, can someone please give me the answers

Chemistry

1 answer:

m_a_m_a [10]3 years ago

4 0

Here are your answers:

1. MgBr2 + Cl2 = MgCl2 + Br2

Balancing,
Already balanced.

Type of reaction: single displacement

2. Al + Fe2O3 = Al2O3 + Fe

Balancing,
2Al + Fe2O3 = Al2O3 + 2Fe

Type: single displacement reaction

3. AgNO3 + ZnCl2 = AgCl + N2O6Zn

Balancing,
2AgNO3 + ZnCl2 = 2AgCl + N2O6Zn

Type: double displacement reaction

MnO2
4. H2O2 ====== O2 + H20 [being catalyzed by manganese dioxide]

Balancing,
MnO2
2H2O2 ====== O2 + 2H2O

Type: decomposition reaction

5. Zn + HCl = ZnCl2 + H2

Balancing,
Zn + 2HCl = ZnCl2 + H2

Type: single displacement reaction

6. H2SO4 + NaOH = Na2SO4 + H2O

Balancing,
H2SO4 + 2NaOH = Na2SO4 + 2H2O

Type: Acid-base reaction

That took hella long!!! Hope it helps.

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3 years ago

In an experiment, a compound was determined to contain 68.94% oxygen and 31.06% of an unknown element by weight. The molecular w

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Answer is: the compound is B₂O₃.

ω(O) = 68.94% ÷ 100%.

ω(O) = 0.6894; percentage of oxygen in the compound.

ω(X) = 31.06% ÷ 100%.

ω(X) = 0.3106; percentage of unknown element in the compound.

If we take 69.7 grams of the compound:

M(compound) = 69.7 g/mol.

n(compound) = 69.7 g ÷ 69.7 g/mol.

n(compound) = 1 mol.

n(O) = (69.7 g · 0.6894) ÷ 16 g/mol.

n(O) = 3 mol.

M(compound) = n(O) · M(O) + n(X) · M(X).

n(X) = 1 mol ⇒ M(X) = 21.7 g/mol; there is no element with this molecular weight.

n(X) = 2 mol ⇒ M(X) = 10.85 g/mol; this element is boron (B).

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Should companies be able to own the DNA conatined in plant seeds?

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3 years ago

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3 years ago

Identify the two types of radiation shown in the figure below. Explain your reasoning.

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Answer:- $\gamma$ and $\alpha$ radiation.

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When alpha particles are passed through electromagnetic field they are repelled by the positive plate and attracted by the negative plate as there is an attraction between opposite charges. So, the line we see towards positive plat is representing an alpha particle radiation.

Since gamma rays are neutral, they are not deflected in electromagnetic field and go straight. So, the other line in the diagram is representing gamma rays radiation.

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3 years ago

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