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QveST [7]
3 years ago
14

What is the main element that stars are made of

Chemistry
1 answer:
stellarik [79]3 years ago
5 0
The majority of these stars are described as being main sequence, which means their cores are fusing HYDROGEN to create helium. The Sun is a main sequence star and its chemical composition mainly consists of hydrogen and helium with trace amounts of other elements.
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What acid and what base would you choose to prepare the salt potassium perchlorate (kclo4)?
Nonamiya [84]
HClO₄ + KOH → KClO₄ + H₂O

HClO₄ - perchloric acid
KOH - potassium hydroxide
8 0
4 years ago
Read 2 more answers
The letters ROYGBIV represent the colors of visible light. Arrange them in order of:
aleksandrvk [35]
Visible and Ultraviolet Spectroscopy

Violet: 400 - 420 nm.

Indigo: 420 - 440 nm.

Blue: 440 - 490 nm.

Green: 490 - 570 nm.

Yellow: 570 - 585 nm.

Orange: 585 - 620 nm.

Red: 620 - 780 nm.

Hope this helps
4 0
3 years ago
Which of the following is a geographic example of a transform fault boundary?
o-na [289]

the san andreas fault is the correct answer

4 0
3 years ago
How many parents does asexual reproduction involve?
blondinia [14]

Answer:

only 1 parent is needed! and the offspring is a identical copy of the parent

6 0
3 years ago
Under certain conditions, the substance calcium carbonate can be broken down to form calcium oxide and carbon dioxide. If 31.7 g
klio [65]

Answer:

13.93\ \text{g}

Explanation:

Molecular weight of CaCO_3 = 100.0869 g/mol

Mass of CaCO_3 = 31.7 g

Moles of CaCO_3 = \dfrac{31.7}{100.0869}=0.3167\ \text{mol}

Moles of both CaO and CO_2 is 0.3167\ \text{mol}

Molecular weight of CO_2 = 44 g/mol

Mass of CO_2 = 44\times 0.3167=13.93\ \text{g}

The mass of carbon dioxide formed simultaneously is 13.93\ \text{g}.

6 0
3 years ago
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