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adoni [48]
2 years ago
6

Perform the following calculations to the correct number of significant figures.

Chemistry
1 answer:
SSSSS [86.1K]2 years ago
4 0
Answer: 460.624

Explanation:
1. Multiply the numbers
(24.5260 x 2.56) + 397.84
= (62.784) + 397.84

2. Add the numbers
(62.784) + 397.84
= 460.624
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7.66 Write balanced equations for the following reactions: (a) potassium oxide with water, (b) diphosphorus trioxide with water,
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Explanation:

(a) potassium oxide with water

K_2O(s)+H_2O(l)\rightarrow 2KOH(aq)

According to reaction,1 mole of potassium  oxide reacts with 1 mole of water to give 1 mole of potassium hydroxide.

(b) diphosphorus trioxide with water

P_2O_3(s)+3H_2O(l)\rightarrow 2H_3PO_3(aq)

According to reaction,1 mole of diphosphorus trioxide reacts with 2 moles of water  to give 2 moles of phosphorus acid.

(c) chromium(III) oxide with dilute hydrochloric acid,

Cr_2O_3(s)+6HCl(aq)\rightarrow 2CrCl_3(aq)+3H_2O(l)

According to reaction,1 mole of chromium(III) oxide reacts with 6 moles of hydrochloric acid to give 2 moles of chromium(III) chloride and 3 moles of water.

(d) selenium dioxide with aqueous potassium hydroxide

SeO_2 (s)+2KOH (aq)\rightarrow K_2SeO_3(aq)+H_2O(l)

According to reaction,1 mole of selenium dioxide reacts with 2 moles of potassium hydroxide to give 1 mole of potassium selenite and 1 mole of water.

6 0
3 years ago
Ground water has some minerals dissolved in it. If you heat this water, collect the vapor in another container, and then cool it
liq [111]
The answer would be the last one- it separates dissolved substances.

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6 0
3 years ago
Classifying Chemical Reactions
olga2289 [7]

Answer:

chemestry

Explanation:

5 0
3 years ago
The reaction A + BC --&gt; B+ AC is a<br> reaction.
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Explanation:

its answer is displacement reaction

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What is true of the total mass of reactants compared to the total mass of products
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Answer:

The total mass of reactants equals the total mass of products  

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Reactants ⟶ products

Thus, if you start with a given mass of reactants, the total mass of products will equal the total mass of reactants.

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3 years ago
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