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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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A patient requiring iv fluid resuscitation is given a bolus of normal saline (0.9% nacl). describe why this isotonic solution is
aleksandr82 [10.1K]
The isotonic solution is appropriate to be given in the goal of maintaining a stable cell environment is because with this solution, this permits water movement to be free, making the solute concentrations to be constant, where in they are not going to be changed, maintaining the environment of the cell. In which this will help the cell to be in a stable environment.
5 0
3 years ago
6.02 x 1023<br> Significant figures
Bond [772]

Answer:

It depends on the number of significant figures you are changing to

Explanation:

6.02×1023=6158.46

1 sig fig = 6000

2 sig fig = 6200

3 sig fig = 6160

4 sig fig = 6158

5 sig fig = 6158.5

6 sig fig = 6158.46

When solving significant figures you have to consider the number after each number like in the case of changing to two sig fig the number following one is five and when the number is up to or greater than five you add a value of one to the number before it. But in a case where the number is less than five you just leave it like that like in the case of changing to one sig fig

3 0
3 years ago
Illustrate: The Avogadro constant is so large it is normally written in scientific notation. To
omeli [17]

Answer:

602200000000000000000000

Explanation:

move the decimal place over 23 places to the right

4 0
3 years ago
Read 2 more answers
Air with less than 19.5% oxygen cannot support human life. How many moles of oxygen would the caisson if the percent of oxygen i
irinina [24]
Are we adding the percent?
8 0
3 years ago
How many grams of Mg(NO3)2 would be produced? please show how you got the answer​
Len [333]

Answer:

148 grams of relative atomic mass

Explanation:

magnesium atomic mass : 24

nitrogen : 14

oxygen : 16

24 × 1

14 × 1 × 2

16 × 3 × 2

24 + 28 + 80 = 148 grams

7 0
3 years ago
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