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2 years ago

5

Which of the following is NOT a pure substance? A. milk B. oxygen C. water D. carbon dioxide

2 answers:

Musya8 [376]2 years ago

4 0

Among the choices given, the substance that is not considered pure is C. milk. Milk is not pure because it is composed of more than one kind of molecule. Milk is composed of lactic acid, water, etc which is a combination of different molecules to form the solution. Others are only made up of one kind of molecule

Sav [38]2 years ago

3 0

Milk is not a pure substance. It is a mixture of many substances in a solution.

I hope this helps. Let me know if anything is unclear.

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How many atoms of oxygen (o)are present 2naOH+H2SO4 2H2O+Na2SO4

Dafna1 [17]

Answer:

10

Explanation:

6 0

2 years ago

Hii pls help me!! <br>even if u know how to do one, it's okk <br>anything helps

tensa zangetsu [6.8K]

Explanation:

a) HNO2(aq) = HNO3(aq) + H2O(l) +NO(g)

b) SoCl2 (l) + H2O (l) = So2(g) + 2HCl(aq)

c) CH4 (g) + 2O2(g) = Co2 (g) + 2H2O(g)

d) 3CuO(s) + 2NH3 (g) = 3Cu(s) + 3H2O (l) + N2(g)

3 0

2 years ago

Imagine mixing 1 tablespoon of Epsom salt with 2 cups of ammonia. How much precipitate would be produced? Describe the amount of

barxatty [35]

The amount of precipitate produced will be proportional to the amount of NH₃ reacted with water to produce NH₄OH.

<h3>What is precipitate?</h3>

Precipitates are the crystal type formation, when the solute is no more dissolving in the solvent.

Imagine mixing 1 tablespoon of Epsom salt with 2 cups of ammonia, the reaction is

2NH₃ + MgSO₄ + 2H₂O → Mg(OH)₂ + (NH₄)₂SO₄

The amount of precipitate produced will be proportional to the amount of NH₃ reacted with water to produce NH₄OH.

Learn more about precipitate.

brainly.com/question/18109776

#SPJ1

4 0

1 year ago

If you have 250 mL of 0.75 M LINO2.<br> How many grams of this substance<br> would you have?

Vesna [10]

Mass of this substance = 9.928 g

<h3>Further explanation</h3>

Molarity is a way to express the concentration of the solution

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

$\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}$

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

So to find the number of moles can be expressed as

$\boxed{\bold{n=V\times M}}$

mol of substance -Lithium nitrite - LiNO₂ :

V = 250 ml = 0.25 L

M = 0.75 M

$\tt n=0.25\times 0.75=0.1875$

So mass of this substance - LiNO₂ (MW=52,947 g/mol) :

$\tt mass=mol\times MW\\\\mass=0.1875\times 52,947 g/mol\\\\mass=9.928~g$

4 0

2 years ago

Which is NOT a reason why organisms communicate with one another?

Tpy6a [65]

Answer:

C. to find housing.

Explanation:

i hope this helps :)

3 0

2 years ago

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