2 years ago

Indicate the correct number of sig figs

Chemistry

1 answer:

Dimas [21]2 years ago

3 0

Explanation:

The answer to questions are

A) 4

B) 3

C) 5

D) 3

E) 3

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A contains 2.60g of impure h2so4 in 5oocm³ of a solution 5.30g of na2co3 in 1.00dm³ of solution

Tatiana [17]

Answer: a. 0.05mol/dm3

bi. 0.045mol/dm3

bii. 4.41g/dm3

c. 84.8%

Explanation:Please see attachment for explanation

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3 years ago

Between reaction of magnesium powder and lead oxide which is oxidized in the reaction and which is oxidizing agent

GuDViN [60]

Answer:

Mg is oxidized and Pb is the oxidizing agent

Explanation:

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3 years ago

.950 L of .420 M H2SO4 is mixed with .900 L of .260 M KOH. What concentration of sulfuric acid remains after neutralization?

kipiarov [429]

H₂SO₄:

V=0,95L
Cm=0,420mol/L

n = CmV = 0,42mol/L * 0,95L = 0,399mol

KOH:

V=0,9L
Cm=0,26mol/L

n = CmV = 0,26mol/L * 0,9L = 0,234mol

H₂SO₄ + 2KOH ⇒ K₂SO₄ + 2H₂O
1mol : 2mol
0,399mol : 0,234mol
limiting reagent
reamins: 0,399mol - 0,117mol = 0,282mol

n = 0,282mol
V = 0,950L + 0,900L = 1,85L

Cm = n / V = 0,282mol / 1,85L ≈ 0,152M

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3 years ago

Calculate the percent by volume of a solution that has 75 mL of solute dissolved in 375 mL of solution. Show your work and round

Mandarinka [93]

Answer:

The answer is 20 % V/V

Explanation:

We use this formula for calculate the %V/V:

%V/V= (ml solute/ml solution) x 100= (75ml/375 ml)x 100 = 20 % V/V

<em>The% V / V represents the amount of ml of solute dissolved in 100 ml of solution</em>

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Carson’s class visited a hydroelectric plant on a field trip during their study of energy. The process interested him, and he ha

AURORKA [14]

Answer:

look in your science book

Explanation:

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2 years ago