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Harrizon [31]
2 years ago
7

Name three skills that you think you need to graduate from college, community college, or

Chemistry
2 answers:
Alik [6]2 years ago
3 0

Answer:

understanding people, organize notes correctly, learn how to organize your time wisely.

Explanation:

kozerog [31]2 years ago
3 0

Answer:

mathematics,English, and social skills.

Explanation:

math, and english because u eill need them for most of your class. social skills for like when you need projects or when u need hell with stuff.

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Which of these is an indication that a chemical reaction has occurred?
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D. a change in color of a substance

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3 years ago
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What is the percent composition of silicon dioxide, SiO2 ? (Atomic masses : O = 16 . 0 Si =28 .1
weeeeeb [17]

Answer:

60.1 i think

Explanation:

4 0
3 years ago
What evidence suggests that global climate change is causing the oceans to get warmer?
jasenka [17]

Answer:

A large point of evidence in this would be the rate of increase in how fast the polar ice caps are melting and the ocean is rising as a result. As the climate is getting warmer so are the oceans and this is causing the ice caps which are in the ocean.

Explanation:

4 0
3 years ago
The equilibrium concentrations of the reactants and products are [ HA ] = 0.260 M [HA]=0.260 M , [ H + ] = 2.00 × 10 − 4 M [H+]=
ValentinkaMS [17]

Answer:

pKa of the acid HA with given equilibrium concentrations is 6.8

Explanation:

The dissolution reaction is:

HA ⇔ H⁺ + A⁻

So at equilibrium, Ka is calculated as below

Ka = [H⁺] x [A⁻] / [HA] = 2.00 x 10⁻⁴ x 2.00 x 10⁻⁴ / 0.260

    = 15.38 x 10⁻⁸

Hence, by definition,

pKa = -log(Ka) = - log(15.38 x 10⁻⁸) = 6.813

7 0
3 years ago
Proportional means that
FromTheMoon [43]
Corresponding in size or amount to something else.
5 0
3 years ago
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