All categories

3 years ago

Help! giving brainliest.

Chemistry

1 answer:

Zigmanuir [339]3 years ago

7 0

Answer:

Explanation:

will group 2 elements gain electrons to bond with non-metals in group 16 in a 2:1 ratio

You might be interested in

How much of Earth's atmosphere is made up of nitrogen and oxygen?

Archy [21]

<span>The right answer is the option B. Close to 99 percent. The atmosphere is a mixture of gases: nitrogen, oxygen, CO2, H2O, argon, among others. Nitrogen is about 78% and oxygen is about 21%, so they two together constitute about 99 percent of the Earth's atmosphere.</span>

3 0

3 years ago

Read 2 more answers

Ethanol (CH3CH2OH), the intoxicant in alcoholic beverages, is also used to make other organic compounds. In concentrated sulfuri

Fed [463]

Answer:

a) 88.48%

b) 0.05625 mol

Explanation:

2CH₃CH₂OH(l) → CH₃CH₂OCH₂CH₃(l) + H₂O(g) Reaction 1

CH₃CH₂OH(l) → CH₂═CH₂(g) + H₂O(g) Reaction 2

a) CH₃CH₂OH = 46.0684 g/mol

CH₃CH₂OCH₂CH₃ = 74.12 g/mol

1 mol CH₃CH₂OH ______ 46.0684 g

x ______ 50.0 g

x = 1.085 mol CH₃CH₂OH

1 mol CH₃CH₂OCH₂CH₃ ______ 74.12 g g

y ______ 35.9 g

y = 0.48 mol CH₃CH₂OCH₂CH₃

100% yield _____ 0.5425 mol CH₃CH₂OCH₂CH₃

w _____ 0.48 mol CH₃CH₂OCH₂CH₃

w = 88.48%

b) Only 0.96 mol of ethanol reacted to form diethyl ether. This means that 0.125 mol of ethanol did not react. 45% of 0.125 mol reacted to form ethylene. Therefore, 0.05625 mol of ethanol reacted by the side reaction (reaction 2). Since 1 mol of ethanol leads to 1 mol of ethylene, 0.05625 mol of ethanol produces 0.05625 mol of ethylene.

4 0

3 years ago

Why does burning wood leaves an ash that is only a small fraction of the mass of the original wood.?

klemol [59]

When wood burns, some of the mass is released as a gas. So if you were to combine the small fraction of ash with the gases released, you would get the mass of the original wood.

6 0

4 years ago

Read 2 more answers

What is the main difference between the Bohr model and the electron cloud model of the atom.

leonid [27]

Electron cloud is an informal term in physics. It is used to describe where electrons are when they go around the nucleus of an atom. The electron cloud model is different from the older Bohr atomic modelby Niels Bohr. Bohr talked about electrons orbiting the nucleus.

8 0

4 years ago

Read 2 more answers

1. A mathematical equation that predicts how a physical phenomenon will behave

tatyana61 [14]

Answer:

1. A mathematical equation that predicts how a physical phenomenon will behave - Scientific law

2. A predicted experimental outcome based on prior knowledge and experience - Hypothesis

3. The variable that is changed on purpose by the scientist - Independent variable

4. The variables that must be kept constant so as not to bias or influence the results - Control variable

5. Data that is descriptive rather than numerical -Qualitative data

6. Data that is numerical - Quantitative data

7. A well tested explanation for why a physical phenomenon occurs - Scientific theory

Explanation:

In the method of science in understanding and explaining phenomena in the universe, observations are made, explanations are put forward, experimented and tested, before conclusions are made. Explanations of some common terms in the scientific process is given below:

1. A scientific law is a mathematical equation that predicts how a physical phenomenon will behave.

2. A hypothesis is a predicted experimental outcome based on prior knowledge and experience.

3. A independent variable is the variable that is changed on purpose by the scientist.

4. A control variable is the variable that must be kept constant so as not to bias or influence the results.

5. Qualitative data is data that is descriptive rather than numerical.

6. Quantitative data is data that is numerical

7. A scientific theory is a well tested explanation for why a physical phenomenon occurs.

7 0

3 years ago