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Nuetrik [128]
3 years ago
9

1. I am a solution with a pOH of 6. What am I?

Chemistry
1 answer:
ivolga24 [154]3 years ago
8 0

Explanation:

I think 1) acidic solution

2) basic solution.

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Why didn't scientists know about atoms for a long time
fredd [130]
They didnt have a powerfull enough microscope to see them an when they could they were moving to fast unless they were cold

6 0
3 years ago
3. Two people are playing tug of war. One person pulls to the right with 32 N of force. The other person pulls to the left with
SVETLANKA909090 [29]

The net force = -5 N

The direction : to the left(negative sign)

<h3>Further explanation </h3>

Net force : the sum of all forces acting on an object

Force is a vector quantity that has both magnitude and direction,

We agree that the move up and to the right is a positive sign, while down and to the left is a negative sign.

The direction of the force (horizontal motion) is to the right (+32 N), and to the left (-37 N), so the net force :

\tt \sum F=F~right-F~left\\\\\sum F=32-37\\\\\sum F=-5~N

5 0
3 years ago
How much heat is absorbed in the complete reaction of 3.00 grams of SiO2 with excess carbon in the reaction SiO2(g) + 3C(s) → Si
defon

Answer:

31.24 kJ

Explanation:

  • SiO₂(g) + 3C(s) → SiC(s) + 2CO(g)        ΔH° = 624.7 kJ/mol

First we <u>convert 3.00 grams of SiO₂ to moles</u>, using its <em>molar mass</em>:

  • 3.00 g SiO₂ ÷ 60.08 g/mol = 0.05 mol

Now we <u>calculate the heat absorbed</u>, using the <em>given ΔH°</em>:

If the complete reaction of 1 mol of SiO₂ absorbs 624.7 kJ, then with 0.05 mol:

  • 0.05 mol * 624.7 kJ/mol = 31.24 kJ of heat would be absorbed.
6 0
3 years ago
____________ enables you to ride a bike without skidding and falling.
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Sliding or rolling friction
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2 years ago
What are the columns on the periodic table called?
Stels [109]
Families are another names for the columns
8 0
3 years ago
Read 2 more answers
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