3 years ago

A plastic ball floats on the water. What do you know about it's density?

Chemistry

1 answer:

Mekhanik [1.2K]3 years ago

6 0

It A the ball has a less density than the water or it could not float

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Read the given equation:

Assoli18 [71]

Answer:

HCl is acid

Ca(OH)2 is base

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3 years ago

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

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3 years ago

2 HCl + 1 Zn -> 1 H2 + ZnCl2 what type of reaction is this

Salsk061 [2.6K]

Answer:

Single replacement reaction

Explanation:

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What do elements Be,Mg,Ca have in common

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They are all in the same family

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Answer: Phosphorus is insoluble in water, but soluble in carbon disulfide. Phosphorus burns spontaneously in air to its pentoxide.

Explanation: Hope this helped! :)

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