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3 years ago

What elements are formed by stars having a mass greater than eight suns?

Chemistry

1 answer:

Hoochie [10]3 years ago

5 0

An elements like helium and Boron are formed by stars having a mass of one to eight suns. The example elements that are formed by stars having a mass of one to eight suns are helium and boron. The stars normally turns into a white dwarf when the mass of the stars are less than 5 times the mass of the sun.

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What is the pH range for an acid? <br> 0-7<br> 7-14<br> 7<br> 0

olga nikolaevna [1]

<h3>Answer: Choice A) 0-7</h3>

Explanation:

If the pH is between 0 and 7, then we have an acid.

If the pH is between 7 and 14, then we have an alkaline base.

If pH = 7, then it's neutral.

7 0

3 years ago

Read 2 more answers

PLS HELP ME I HAVE TILL 12

MariettaO [177]

Answer:

alright bud lets see hmm.... the answer is a. 90.5kpa

Explanation:

92.3 kPa - 1.82 kPa = 90.5 kPa

keep up your hope also corrected me if a am wrong in anyway! :)

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3 years ago

5. Why doesn't the air at a frontal boundary mix?

Vsevolod [243]

Answer:

At a front, the two air masses have different densities, based on temperature, and do not easily mix. One air mass is lifted above the other, creating a low pressure zone.

Explanation:

Hope this helps!

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3 years ago

1) How many moles are in 4.0x10^24 atoms?

-Dominant- [34]

Answer:

<h2>6.64 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{4 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 6.644518...$

We have the final answer as

<h3>6.64 moles</h3>

Hope this helps you

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3 years ago

The specific heat capacity of graphite is 0.71 J/°C g.

Tom [10]

Answer:

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Explanation:

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3 years ago