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2 years ago

NiSe2 + Ca3(PO4)2 = Ni3(PO4)2 + CaSe balance please

Chemistry

1 answer:

Aliun [14]2 years ago

8 0

3Ni + Sn3(PO4)2 → Ni3(PO4)2 + 3Sn I think. Not for sure though

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In general how are word equations written to describe chemical equations

Alexus [3.1K]

<span>chemicals reacting are written on the left, what is formed is written on the right after the = sign

eg Copper + oxygen = copper oxide.
Hope this helps , mark as brainliest and say thanks THANKS..</span>

5 0

3 years ago

1) If 0.193 grams of toluene is dissolved in 2.532 grams of p-xylene, what is the molality of toluene in the solution?2) If a fr

AveGali [126]

Answer:

The value of $K_f$ for xylene is 4.309°C/m.

The molar mass of pentane using this data is 73.82 g/mol.

Explanation:

$\Delta T_f=K_f\times \frac{\text{Amount of solute}}{\text{Molar mass of solute}\times \text{Mass of solvent(kg)}}$

where,

$\Delta T_f$ =depression in freezing point

$K_f$ = freezing point constant

we have :

1) freezing point constant for xylene = $K_f$ =?

Mass of toluene = 0.193 g

Mass of xylene = 2.532 kg = 0.002532 kg ( 1 g =0.001 kg)

$\Delta T_f=3.57^oC$

$3.57^oC=K_f\times \frac{0.193 g}{92 g/mol\times 0.002532 kg}$

$K_f=4.309^oC/m$

The value of $K_f$ for xylene is 4.309°C/m.

Mass of pentane = 0.123 g

molar mass of pentame= M

Mass of xylene = 2.493 g = 0.002493 kg

Freezing point Constant of xylene = $K_f=4.309^oC/m$

$2.88^oC=4.309^oC/m\times \frac{0.123g}{M\times 0.002493 kg}$

M = 73.82 g/mol

The molar mass of pentane using this data is 73.82 g/mol.

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3 years ago

The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide

shusha [124]

Answer:

where are the answer choices

Explanation:

4 0

3 years ago

Read 2 more answers

What are properties of matter ?

Oduvanchick [21]

THANKS for asking .

follow me :) (:

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3 years ago

Read 2 more answers

What is a disadvantage of using chemical indicators

VARVARA [1.3K]

Answer:

The disadvantages of chemical indicators is that they must be selected for a narrow pH range. They cannot determine the exact value of pH of the solution.

(Hope this helps) Sky

4 0

3 years ago