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Alona [7]
3 years ago
12

PLEASEEEEEE answer these 2 questions!! I WILL GIVE BRAINLIEST AND POINTS

Chemistry
1 answer:
Olegator [25]3 years ago
8 0

Answer: B  then D

Explanation:

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The molecular weight for the compound from the previous question is
omeli [17]
The molecular formula should have been give to you from ur teacher
7 0
3 years ago
Which of the following is a property of a pure substance?
wolverine [178]
D.) the original components retain their individual properties
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3 years ago
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water is conductor or insluator? nails are conductor or insulator? key chains are conductor or insulator?
e-lub [12.9K]

Answer:

Explanation:

Water is a conductor if it has solutes/ions dissolved in it(tapwater for example)

but pure water is not a good conductor of electricity.

Nails and keychains(made of metal) are conductors of electricity.

3 0
3 years ago
A hot air balloon is filled with 15 moles helium gas and 5 moles nitrogen gas. What is the volume of the balloon at 1.01 atm and
kvasek [131]

<u>Given:</u>

Moles of He = 15

Moles of N2 = 5

Pressure (P) = 1.01 atm

Temperature (T) = 300 K

<u>To determine:</u>

The volume (V) of the balloon

<u>Explanation:</u>

From the ideal gas law:

PV = nRT

where P = pressure of the gas

V = volume

n = number of moles of the gas

T = temperature

R = gas constant = 0.0821 L-atm/mol-K

In this case we have:-

n(total) = 15 + 5 = 20 moles

P = 1.01 atm and T = 300K

V = nRT/P = 20 moles * 0.0821 L-atm/mol-K * 300 K/1.01 atm = 487.7 L

Ans: Volume of the balloon is around 488 L


3 0
3 years ago
Phosphorus has three isotopes, 31p, 32p, and 33p. the atomic number of phosphorus is 15. how many protons does each of the isoto
klemol [59]
<span>For isotopes of any element, the number of protons remains the same, BUT the number of neutrons changes. Since each of the isotopes listed is phosphorus, All three have 15 protons. (They have 16, 17 and 18 protons respectively.)</span>
5 0
3 years ago
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