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tia_tia [17]
3 years ago
12

Which is not a compound? oxygen gas water silicon dioxide carbon dioxide gas

Chemistry
1 answer:
olchik [2.2K]3 years ago
7 0

Answer:

Oxygen gas

Explanation:

It is a pure element. The rest are compounds made up of two or more elements. For eg silicon dioxide is made of silicon and oxygen.

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A chemist prepares a solution of mercury(I) chloride Hg2Cl2 by measuring out
Genrish500 [490]

Answer:

1.26 × 10^-8 M

Explanation:

We are given;

Number of moles of mercury (i) chloride as 0.000126 μmol

Volume is 100 mL

We are required to calculate the concentration of the solution.

We need to know that;

Concentration is also known as molarity is given by;

Molarity = Number of moles ÷ Volume

Number of moles = 1.26 × 10^-10 Moles

Volume = 0.01 L

Therefore;

Concentration = 1.26 × 10^-10 Moles ÷ 0.01 L

                       = 1.26 × 10^-8 M

Thus, the molarity of the solution is 1.26 × 10^-8 M

6 0
3 years ago
A 30-g car rolls from a hill 12 cm high and is traveling at 154 cm/s as it travels along a 275 cm horizontal track. What is the
Olegator [25]

Answer:

Explanation:

By definition, the momentum is given by:

p=m*v

Where,

m: car mass

v: speed of the car

Substituting the values in the given definition we have:

p=3*154

Answer:

the momentum of the car is:

4620g * cm/s

8 0
3 years ago
Can someone please help me with this asap, it’s due today please help me
hammer [34]

Answer:

lol I hate chemical but let me give some advice

Explanation:

Please go on Khan Academy or look at your notes and I promise you can figure out! Seriously, I am trying to be helpful not like the annoying teacher that says "figure it out"

7 0
3 years ago
What are three factors that control deep currents?
Lyrx [107]
Global winds, coriolis effect and <span>continental deflections. Hope this helps!</span>
8 0
3 years ago
Help me plsssssssssssssssssssss
iren [92.7K]

Answer:

B

Explanation:

Noble gases are in group 18 (neon, argon, etc)

7 0
3 years ago
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