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borishaifa [10]

3 years ago

14

What typically happens to a star after it becomes a white dwarf? Earth Science Help plz

1 answer:

Oksi-84 [34.3K]3 years ago

3 0

It starts to dim. I hope this helps you.

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What is the definition of a Double Displacement Reaction?

fiasKO [112]

Answer:

A double displacement is a type of chemical reaction that in which the reactant ions exchange places to form new products

Explanation:

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4 0

2 years ago

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If the internal energy of the products of a reaction is lower than the internal energy of the reactants, what is the sign of δe

Pachacha [2.7K]

It has a positive sign

4 0

3 years ago

Help me please thanks

Sav [38]

Element? I'm quite not sure but...Hope this helps!

4 0

3 years ago

How many moles are in 12 grams of NH3?

aleksklad [387]

Answer:

molecular weight of NH3 or grams This compound is also known as Ammonia. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles NH3, or 17.03052 grams.

8 0

3 years ago

What mass of radon is in 8.17 moles of radon?

Len [333]

Answer:

1813.74g

Explanation:

Given parameters:

Number of moles of radon = 8.17moles

Unknown:

Mass of radon = ?

Solution:

To solve this problem, we use the expression below:

Number of moles = $\frac{mass}{molar mass}$

Molar mass of radon = 222g/mol

Now insert the parameters and solve;

Mass of radon = Number of moles x molar mass

= 8.17 x 222

= 1813.74g

4 0

3 years ago