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GalinKa [24]
3 years ago
13

Which of the following statements is true?

Chemistry
2 answers:
photoshop1234 [79]3 years ago
7 0

Answer:Electrons are atoms that are magnetic

Explanation:All atoms have electrons

Flura [38]3 years ago
6 0

Answer:

A material with randomly oriented atoms is not magnetic

Explanation:

the way atoms are arranged affects its magnetic field, so if its unorderly arranged, it doesn't have that magnet attraction

Electrons are not atoms: they are <em>part</em> of atoms

not <em>all</em> material in the world is magnetic. that would be disastrous.

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A compound is 52.0% zinc 9.6% carbon and 38.4% oxygen. Calculate the empirical formula of the compound.
skad [1K]

Answer:

So a compound is 52% Zinc(Zn), 9.6% Carbon(C), and 38.4% Oxygen (O). Let’s first start off by assuming that we have 100 g of this compound. This means that we have 52 g of Zinc, 9.6 g of Carbon, and 38.4 g of Oxygen.Zinc = 65.38 g/molCarbon = 12 g/molOxygen = 16 g/molThis means we have:52 g of Zn(1 mol Zn/65.38 g of Zn) ≈0.8 mol of Zn.9.6 g of C(1 mol C/12 g of C) = 0.8 mol of C38.4 g of O(1 mol of O/16 g of O) = 2.4 mol of O.

Explanation:

What we want to do next is divide each element by the common factor of all of them, which is 0.8. In most cases, you divide each element by the element with the least amount of moles. After we divide each by 0.8, you’ll notice you have 1 Zn, 1 C, and 3 O. This gives you the empirical formula of ZnCO3, or Zinc Carbonate.

6 0
2 years ago
Calculate the mass in grams for a single molecule of carbon monoxide​
Oxana [17]

Answer:

7.307 x 10^-23

Explanation:

mass of one molecule = mr/ avogadros number

= 44/6.022 x 10^23

= 7.307x 10^-23

4 0
3 years ago
BRAINLIESTTT ASAP!!! PLEASE ANSWER!
sladkih [1.3K]

If the item or substance has changed into a state where you are able to change it back such as:

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Water freezing

4 0
3 years ago
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How does air above a heated surface move?
anzhelika [568]
<span> When air is warmed up, its molecules move faster and faster and as a result they move further from each other. They still have the same mass, but they now occupy a larger volume. This means that its density is smaller.
The opposite when air is cooled off. The molecules slow down, get closer together, occupy a smaller volume and therefore its density is bigger.

When air is warmed up, it goes up. Once it's up there, is cools off and goes back down. Near the heated surface the air gets warmed up again, goes up, cools down, goes back down, and again and again.
that is called convection cells
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6 0
3 years ago
What does the density of ocean water depend upon
OverLord2011 [107]

It depends on depth

Hope this helps :)

3 0
3 years ago
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