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ira [324]
3 years ago
6

Question 9 of 10

Chemistry
1 answer:
UkoKoshka [18]3 years ago
5 0
<span>C. There was a ground wire attached to the outlet.

option C is your answer 'cause if there was a ground wire, then electricity would flow through it & maria didn't get any electric shock

Hope this helps!
</span>
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2. A sample of 2 tsp of sugar (C12H22011) weighs 9.00 g.
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Which of the following statements provide evidence to support the big bang theory? Select the two correct answers. i need help p
Leona [35]

Answer:

See explaination

Explanation:

CBR (Cosmic Background Radiation)-

Uniform energy that is heard everywhere in the universe. It supports the Big Bang Theory because we can assume that it also started in the same place.

Hubble's Law-

Hubble's Law states that the planets are getting farther away from eachother, therefore, the universe is expanding and must have started as a smaller piece.

8 0
3 years ago
4. When the following equation is balanced, what is the coefficient for HCI?
kozerog [31]

Hey there!

Mg + HCl → MgCl₂ + H₂

Balance Cl.

1 on the left, 2 on the right. Add a coefficient of 2 in front of HCl.

Mg + 2HCl → MgCl₂ + H₂

Balance H.

2 on the left, 2 on the right. Already balanced.

Balance Mg.

1 on the left, 1 on the right. Already balanced.

Our final balanced equation: Mg + 2HCl → MgCl₂ + H₂

Hope this helps!

8 0
3 years ago
Which of these animals must gain heat to perform internal activities such as digestion? A) warm-blooded animal B) cold-blooded a
Jlenok [28]
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7 0
3 years ago
A sample of solid sodium hydroxide, weighing 13.20 grams is dissolved in deionized water to make a solution. What volume in mL o
andrew11 [14]

702 mL of 0.235 M H₂SO₄ solution are needed to neutralize the NaOH

Explanation:

When sodium hydroxide (NaOH) is neutralized by the sulphuric acid (H₂SO₄) the following chemical reaction occur:

2 NaOH + H₂SO₄ → Na₂SO₄ + 2 H₂O

number of moles = mass / molecular weight

number of moles of NaOH = 13.20 / 40 = 0.33 moles

Taking in account the chemical reaction, we devise the following reasoning:

if        2 moles of NaOH are reacting with 1 mole of H₂SO₄

then   0.33 moles of NaOH are reacting with X moles of H₂SO₄

X = (0.33 × 1) / 2 = 0.165 moles of H₂SO₄

molar concentration = number of moles / volume (L)

volume = number of moles / molar concentration

volume of H₂SO₄ solution = 0.165 / 0.235 = 0.702 L = 702 mL

Learn more about:

molar concentration

brainly.com/question/5618544

brainly.com/question/9183916

#learnwithBrainly

8 0
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