Chemistry High School

The number of energy levels is determined by the

a. groups
b. periods
c. valence electrons
d. atomic mass number

Answers

Answer 1

Answer:

The answer is C

Explanation:

I did look it up, the other kid just spams random bs for points, hope you didn't get it wrong because of him! :)

Related Questions

3. What do you think is the primary reason why the Unionid mussel population declined whenever there is a dramatic increase in the Zebra mussel population?

Answers

When the Zebra arrived they ate all the food in the area leaving Unionid numbers to decline and die as they have no food to eat.

What do you infere about using nonrenweable vs renewable resources and the effect this has on the cost of energy

Answers

Answer:

See explanation

Explanation:

Renewable energy resources refers to energy resources  that can not be depleted such as wind, solar, biomass etc.

Non-renewable energy resources refers to those energy resources that can be depleted such as fossil fuels.

Globally, it has been established that energy from renewable sources costs less than energy from nonrenewable(especially fossil fuel) sources.

According to Forbes, 2019, "The worldwide weighted average cost of electricity from solar power concentration fell by 26%, that of bioenergy reduced by 14%, solar photovoltaics, geothermal, onshore, as well as offshore wind, fell by 14%, and hydropower by 12%.".

This shows us that renewable energy remains the cheapest alternative in terms of energy cost.

Find the mass of 2 moles of:

1. Oxygen atoms

2. Oxygen molecules

Answers

Answer: 1. 2 moles of oxygen atoms = 32 grams

2. 2 moles of oxygen molecules = 64 grams

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number of particles.

1 mole of oxygen atom (O) weighs = 16 g

Thus 2 moles of oxygen atom (O) weighs = [tex]\frac{16}{1}\times 2=32 g[/tex]

Also 1 mole of oxygen molecule [tex](O_2)[/tex] weigh = 32 g

Thus 2 moles of oxygen molecule [tex](O_2)[/tex] = [tex]\frac{32}{1}\times 2=64 g[/tex]

What are high tides caused by

Answers

Answer: the moons gravitational force

Explanation:

They happen because I go into the water.

how do we know that all the continents were all together at one point in time. writing prompt and it has to be at least 7 sentences ​

Answers

Answer:

We can tell by how the continents look. Scientists who propose the pangea theory have said this. You can see for yourself because all the continents look like puzzle pieces you could put together. Scientists can also tell from the species. For example, let's say a scientist found a bone of a creature at the edge of a continent, the edge of another would have the same species. They have also calculated that the continents in itself are still splitting apart, but very slowly. The reason they split up was because tectonic plate movements.

What is a unwanted change in the environment caused by substances or from of energy??

Answers

Answer:

pollution I think

Explanation:

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