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2 years ago

Huge Stars are how many times more (in mass) than our sun?

Chemistry

1 answer:

xenn [34]2 years ago

5 0

The answer should be answer B. More than three times the sun. I hope this helped! :)))

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Calculate the solubility of ( = ) in moles per liter. Ignore any acid–base properties. s = mol/L Calculate the solubility of ( =

BaLLatris [955]

This is an incomplete question, here is a complete question.

Calculate the solubility of each of the following compounds in moles per liter. Ignore any acid-base properties.

CaCO₃, Ksp = 8.7 × 10⁻⁹

Answer : The solubility of CaCO₃ is, $9.33\times 10^{-5}mol/L$

Explanation :

As we know that CaCO₃ dissociates to give $Ca^{2+}$ ion and $CO_3^{2-}$ ion.

The solubility equilibrium reaction will be:

$CaCO_3\rightleftharpoons Ca^{2+}+CO_3^{2-}$

The expression for solubility constant for this reaction will be,

$K_{sp}=[Ca^{2+}][CO_3^{2-}]$

Let solubility of CaCO₃ be, 's'

$K_{sp}=(s)\times (s)$

$K_{sp}=s^2$

$8.7\times 10^{-9}=s^2$

$s=9.33\times 10^{-5}mol/L$

Therefore, the solubility of CaCO₃ is, $9.33\times 10^{-5}mol/L$

4 0

2 years ago

A teaspoon of powdered caffeine can be as deadly as a teaspoon of ricin. True or False

Darina [25.2K]

A teaspoon of caffeine is NOT deadly as teaspoon of ricin

4 0

2 years ago

Read 2 more answers

Is methane used as fule gas true or false

Hitman42 [59]

Answer:

its true methane is used as a fuel gas

Explanation:

4 0

2 years ago

The acceleration of a sprinter is 10 m/s2. The force exerted on the starting blocks is 650 N. What is the mass of the sprinter?

jek_recluse [69]

The relation between force, mass of an object and its acceleration is given by following equation

F = mass of object X acceleration

The unit of Force is Newton (N)

unit of acceleration is ms⁻²

unit of mass if Kg

[all these are SI units]

Mass of object = $\frac{Force}{acceleration}$

mass of sprinter = $\frac{650}{10}=65kg$

5 0

2 years ago

Read 2 more answers

What type of reaction is: CaO + H2O -> Ca(OH)2? A. Combustion B. Synthesis C. Double Replacement D. Decomposition

12345 [234]

Answer:

The reaction is B. Synthesis

Explanation:

In the case of this reaction, it corresponds to a synthesis where 2 compounds (calcium oxide and water) are combined to form a new one (calcium hydroxide).

8 0

2 years ago