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Nimfa-mama [501]
3 years ago
13

3. If we remember seeing something happen, we can trust that it happened just as we think it did. True or False​

Chemistry
1 answer:
djverab [1.8K]3 years ago
3 0

\huge{ \underbrace{ \overbrace{True}}}

.

\huge\mathfrak\purple{Hope  \: it  \: helps}

Note : Because Many of My Dreams came true and I realized.

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A family ppoo holds 10000 gallons of water. how many cubic meters is this
yKpoI14uk [10]

10000 gallons= 37.85 cubic feet

7 0
4 years ago
What are the answer??
MrMuchimi

Answer:?

Explanation:None

4 0
3 years ago
classify each of the statements about gases as true or false. oxygen molecules at 25 celsius are moving faster than oxygen
AleksandrR [38]

Since gas molecules average velocity depends on temperature, oxygen molecules at 25°C are moving faster than oxygen molecules at 0 °C.

According to the kinetic theory of gases, the molecules of a gas are in constant random motion and collide frequently with each other and the walls of the container.

The average speed of gas molecules depends on temperature and molar mass as shown by the relation;

vrms = √3RT/M

The following statement are true among the options provided;

  • Oxygen molecules at 25°C are moving faster than oxygen molecules at 0 °C
  • Gases exert pressure by colliding with container walls

The following are false among the options provided;

  • All hydrogen molecules are moving with the same velocity
  • Nitrogen gas exerts more pressure than hydrogen gas because nitrogen molecules are heavier than hydrogen molecules.
  • Nitrogen molecules remain suspended in the atmosphere because they are not attracted to Earth by gravitational forces.

Learn more: brainly.com/question/6505878

7 0
3 years ago
Round to 3 significant figures.<br> 1.235
tigry1 [53]

Answer:

3 SigFigs = 1.24

1.24 x 10^{0}

Explanation:

3 0
4 years ago
Read 2 more answers
A 5.024 mg sample of an unknown organic molecule containing carbon, hydrogen, and nitrogen only was burned and yielded 13.90 mg
Dafna1 [17]

Answer:

C8H17N

Explanation:

Mass of the unknown compound = 5.024 mg

Mass of CO2 = 13.90 mg

Mass of H2O = 6.048 mg

Next, we shall determine the mass of carbon, hydrogen and nitrogen present in the compound. This is illustrated below:

For carbon, C:

Molar mass of CO2 = 12 + (2x16) = 44g/mol

Mass of C = 12/44 x 13.90 = 3.791 mg

For hydrogen, H:

Molar mass of H2O = (2x1) + 16 = 18g/mol

Mass of H = 2/18 x 6.048 = 0.672 mg

For nitrogen, N:

Mass N = mass of unknown – (mass of C + mass of H)

Mass of N = 5.024 – (3.791 + 0.672)

Mass of N = 0.561 mg

Now, we can obtain the empirical formula for the compound as follow:

C = 3.791 mg

H = 0.672 mg

N = 0.561 mg

Divide each by their molar mass

C = 3.791 / 12 = 0.316

H = 0.672 / 1 = 0.672

N = 0.561 / 14 = 0.040

Divide by the smallest

C = 0.316 / 0.04 = 8

H = 0.672 / 0.04 = 17

N = 0.040 / 0.04 = 1

Therefore, the empirical formula for the compound is C8H17N

8 0
3 years ago
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