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finlep [7]
2 years ago
10

A student drops some metal paper clips in a box of sand. The student uses a magnet to separate the metal paper clips from the sa

nd. The reason this works is that the sand and paper clips together are a
A) mixture.
B) element.
C) compound.
D) substance.
Chemistry
1 answer:
Dmitriy789 [7]2 years ago
3 0

Answer:

compound

Explanation:

because now there are one together

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The decomposition of a compound at 400⁰C is first order with half-life of 1570 seconds. what fraction of an initial amount of th
kirill115 [55]

Answer: After 4710 seconds, 1/8 of the compound will be left

Explanation:

Using the formulae

Nt/No = (1/2)^t/t1/2

Where

N= amount of the compound  present at time t

No= amount of compound present at time t=0

t= time taken for N molecules of the compound to remain = 4710 seconds

t1/2 = half-life of compound  = 1570 seconds

Plugging in the values, we have  

Nt/No = (1/2)^(4710s/1570s)

Nt/No = (1/2)^3

Nt/No= 1/8

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5 0
2 years ago
How many protons z and how many neutrons n are there in a nucleus of the most common isotope of silicon, 2814si?
zheka24 [161]
The 28 is the sum of the protons and neutrons in the element silicon.
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7 0
3 years ago
Read 2 more answers
If 1/4 cups are in 1 serving jow many servings are in 4 cups​
mote1985 [20]

Answer:

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Explanation:

7 0
3 years ago
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Neporo4naja [7]

Answer:

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Explanation:

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In this interaction the hydrogen atom has partial positive charge and electronegative atom has partial negative charge.

6 0
2 years ago
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Murrr4er [49]
4 grams , mass cannot be created or destroyed. it has to be the same on both sides of the equation
5 0
3 years ago
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