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valina [46]
2 years ago
10

PLZ HELP!!!! I ONLY HAVE 20MIN.

Chemistry
2 answers:
VARVARA [1.3K]2 years ago
5 0

Answer:

number 4

Explanation:

sorry if wrong

anastassius [24]2 years ago
3 0

Answer:

4

Explanation:

in order for the bobber to float,it must be less dense, and for the line to sink, it must be more dense.

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How many liters of a 0.30M solution are needed to give 2.7 moles of solute? Your answer:
OverLord2011 [107]
You HAVE TO know that molarity (M) tells you the number of moles of a solute per Liters of solution.
M=mol/L
0.3M = 2.7 mol/ Volume
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Volume = 0.9 L
8 0
3 years ago
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How many electrons are in the n = 2 shell of a magnesium atom?
Montano1993 [528]

Answer:

eight

Explanation:

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hope this helps

8 0
2 years ago
A blood sample of 4.01 milliliters is collected from a patient to be analyzed for a platelet count. Human blood should have arou
Harlamova29_29 [7]

Given :

Human blood should have around 1.04 kg/L platelets.

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To Find :

The expected mass in grams of platelets in the blood sample.

Solution :

1 L of human blood contains 1.04 kg of platelets.

So, amount of platelets is 1 ml blood is :

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Mass of platelets in 4.01 ml blood is :

m = 1.04\times 4.01\ gram\\\\m = 4.1704\ gram

Hence, this is the required solution.

3 0
3 years ago
Give the formula of the chlorine ion​
seraphim [82]

Answer:

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3 0
3 years ago
use the reaction that occours when magnesium burns in oxygen to show how a reaction might be included in more than one category
Schach [20]
2Mg+O₂⇒2MgO
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5 0
3 years ago
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