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4 years ago

PLEASE HELP WITH QUESTION ONE! Twenty points

Chemistry

2 answers:

Alexxx [7]4 years ago

6 0

To find the pH, you have to do -log[H] which is around 7.02228

Nostrana [21]4 years ago

3 0

the answer is closest to 7

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A chemistry student is given 600. mL of a clear aqueous solution at 37° C. He is told an unknown amount of a certain compound X

ycow [4]

Answer:

The solubility is $S = 0.0014 \ g$

Explanation:

From the question we are told that

The volume of the solution is $V = 600 mL$

The initial temperature is $T_i = 37 ^oC$

The final temperature is $T_f = 21^oC$

The additional precipitate is $m = 0.084 \ kg = 84 \ g$

Yes because the solubility of the substance X is the amount of X needed to saturate a unit volume of the solvent (for solubility of a solute to be calculated the solute must be able to saturate the solvent)

now we see that the substance X saturated the solvent because a precipitate was formed which the student threw away

The solubility at 21 ° C is mathematically represented as

$S = \frac{m}{m_w * 100 g \ of water }$

Mass of water( $m_w$ ) in the solution is mathematically represented as

$m_w = V * \rho_w$

Where $\rho = 1 \frac{g}{mL}$

$m_w =600 * 1$

$m_w =600g$

$S = \frac{84}{600 * 100 g \ of water }$

$S = 0.0014 \ g$

6 0

3 years ago

If you can choose any animal in the world to be, what animal would you choose. (I'd be a wolf or a dog, mostly a wolf)

masha68 [24]

I would say a wolf or a horse for me.

3 0

3 years ago

Read 2 more answers

18. Use the activity series to predict whether the following synthesis reaction will occur. Write the chemical equations for the

MAXImum [283]

<u>Answer:</u> The chemical reaction for the synthesis reaction is given below.

<u>Explanation:</u>

Synthesis reaction is defined as a chemical reaction in which two small chemical substances combine together to form a single compound. The general equation for this chemical reaction follows:

$A+B\rightarrow AB$

For the reaction of calcium and oxygen combining together to form calcium oxide, the equation follows:

$2Ca(s)+O_2(g)\rightarrow 2CaO(s)$

By Stoichiometry,

2 moles of calcium element combines together with 1 mole of oxygen gas to produce 2 moles of calcium oxide.

Hence, the chemical equation for the reaction is given above.

8 0

3 years ago

Give the name and formula of the compound formed from the following elements:<br> (c) ₉₀Q and ₅₃R

Brut [27]

The name of the compound is Thorium (IV) Iodide and formula of the compound ThI₄.

<h3>What is Molecular Formula ?</h3>

The chemical formula that gives total number of atoms of each element in one molecule of a compound is called Molecular Formula.

<h3>What is Atomic Number ?</h3>

The number of proton which is used to separate one element from the other element is called Atomic Number.

here the atomic of the element Q is 90 and the atomic number of R is 53. The element Q is Thorium. Symbol of Thorium is Th. The element R is Iodine. Symbol of Iodine is I.

The valency of thorium is +4 and valency of Iodine is -1. So the formula of the compound is ThI₄.

Thus from the above conclusion we can say that The name of the compound is Thorium (IV) Iodide and formula of the compound ThI₄.

Learn more about the Atomic Number here: brainly.com/question/4206478

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7 0

2 years ago

What is the percent by mass of sodium in Na2SO4? total mass of element in compound molar mass of compound Use %Element x 100

Kisachek [45]

What is the percent by mass of sodium in Na2SO4? total mass of element in compound molar mass of compound Use %Element x 100

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4 years ago