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tatyana61 [14]
3 years ago
11

(02.01 MC)

Chemistry
1 answer:
Rina8888 [55]3 years ago
4 0

Answer:

C. Particle size

Explanation:

The sand, which has smaller particles, will go through the sieve, while the rice (with a larger particle size) will not

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Precipitation reaction and double displacement reaction
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What is the electron configuration of a n3- anion?
asambeis [7]

Answer:

You can see in the above illustration of the periodic table that N is in Period 4, Group 5A, and p-block. Before reaching N, you will pass through the atomic orbitals 1s, 2s, and 2p. The electron configuration of N3- is N3-: 1s22s22p6 .

Explanation:

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3 years ago
The temperature of a 15-g sample of lead metal increases from 22 °C to 37 °C upon the addition of 29.0 J of heat. The specific h
Kryger [21]

Answer:

0.13 J/g.°C.

Explanation:

  • To solve this problem, we can use the relation:

<em>Q = m.c.ΔT,</em>

where, Q is the amount of heat absorbed by lead (Q = 29.0 J).

m is the mass of lead (m = 15.0 g).

c is the specific heat capacity of lead (c = ??? J/g.°C).

ΔT is the temperature difference (final T - initial T) (ΔT =  37 °C - 22 °C = 15.0 °C).

∵ Q = m.c.ΔT

<em>∴ c = Q/m.ΔT </em>= (29.0 J)/(15.0 g)(15.0 °C) = <em>01288 J/g.°C ≅ 0.13 J/g.°C.</em>

3 0
4 years ago
What is a force, provide an example
alexandr1967 [171]

Answer:

A force involves an interaction between two or more objects, and it causes a push or pull between the objects. ... Good examples of opposing force include drag due to interaction with an air mass and the force due to friction between two objects.

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3 years ago
Brass is an alloy of copper and zinc. The two metals are melted, mixed, and then solidified. How would you BEST classify brass?
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Answer is maybe ok D)
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3 years ago
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