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Margaret [11]
2 years ago
13

20 points to anybody that can answer all 3 of these questions

Chemistry
2 answers:
Brilliant_brown [7]2 years ago
3 0

Answer:

1. 2AgO2 --> 4 Ag + O2

2. Decomposition

3. 2NaBr + CaF2 --> 2NaF + CaBr2

Explanation:

hammer [34]2 years ago
3 0
I believe the answers are the following:
1. C
2. B
3. B
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What<br>was the initial volume of the hydrogen in cm3?​
svetlana [45]

Answer:

255.51cm3

Explanation:

Data obtained from the question include:

V1 (initial volume) =?

T1 (initial temperature) = 50°C = 50 + 273 = 323K

T2 (final temperature) = - 5°C = - 5 + 237 = 268K

V2 (final volume) = 212cm3

Using the Charles' law equation V1/T1 = V2/T2, the initial volume of the gas can be obtained as follow:

V1/T1 = V2/T2

V1/323 = 212/268

Cross multiply to express in linear form

V1 x 268 = 323 x 212

Divide both side by 268

V1 = (323 x 212)/268

V1 = 255.51cm3

Therefore, the initial volume of the gas is 255.51cm3

5 0
2 years ago
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Which example is NOT a model?
lidiya [134]

Answer:

B

Explanation:

i think leter B it because

7 0
3 years ago
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In the titration of 50. 0 mL of 0. 400 M HCOOH with 0. 150 M LiOH, how many mL of LiOH are required to reach the equivalence poi
mart [117]

The volume of the 0.15 M LiOH solution required to react with 50 mL of 0.4 M HCOOH to the equivalence point is 133.3 mL

<h3>Balanced equation </h3>

HCOOH + LiOH —> HCOOLi + H₂O

From the balanced equation above,

The mole ratio of the acid, HCOOH (nA) = 1

The mole ratio of the base, LiOH (nB) = 1

<h3>How to determine the volume of LiOH </h3>
  • Molarity of acid, HCOOH (Ma) = 0.4 M
  • Volume of acid, HCOOH (Va) = 50 mL
  • Molarity of base, LiOH (Mb) = 0.15 M
  • Volume of base, LiOH (Vb) =?

MaVa / MbVb = nA / nB

(0.4 × 50) / (0.15 × Vb) = 1

20 / (0.15 × Vb) = 1

Cross multiply

0.15 × Vb = 20

Divide both side by 0.15

Vb = 20 / 0.15

Vb = 133.3 mL

Thus, the volume of the LiOH solution needed is 133.3 mL

Learn more about titration:

brainly.com/question/14356286

8 0
1 year ago
Sort each of the following events based on whether the solubility of the indicated gas will increase, decrease, or stay the same
Andre45 [30]
<span>1. the pressure of a gas over a solvent is increase
</span> Gas solubility decreases"<span>

2. the partial pressure of an anesthetic gas is increased 
</span> " gas solubility does not change"<span>

3. air in blood a diver descends 10 M and pressure increases by 1 atm
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4. the temp is increase
</span>"gas solubility increases"<span>

5. O2 the temp of a body of water rises.
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3 years ago
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~Hey guys, can somebody answer this for me, thanks :) ~
NISA [10]
I think it's 11.56 minutes
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