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ahrayia [7]
3 years ago
12

According to recent research, ice skaters are able to glide smoothly across the ice because _____.

Chemistry
1 answer:
Yanka [14]3 years ago
5 0
Friction because smooth ice provides very little resistance against objects, like ice skates being dragged across its surface.
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How is laughing gas made first answer gets brainleist and 100 points
Ket [755]

Answer:

Make nitrous oxide or laughing gas by heating ammonium nitrate and collecting the vapor by bubbling it up into a container over water. ... It's easy to make nitrous oxide or laughing gas at home or in the lab. All you need is a heat source and ammonium nitrate

Explanation:

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2 years ago
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Determine the number of atoms in 73.0 grams of calcium, Ca. (The
Elden [556K]
# of atoms per mol = Avogadro’s # (6.022 x 10^23)

Number of mols = mass of substance / molar mass

73 g / 40.08 g = 1.8 mols of Ca in 73 grams

1.8 mols x avagadro’s # = 1.1 x 10^24 atoms in 73 grams of Ca
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3 years ago
Assuming equal concentrations, rank these solutions by ph.? assuming equal concentrations, rank these solutions by ph. koh (aq h
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I remember coming across this question and the options were:
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3 years ago
Anthony's homework assignment is to demonstrate that an orange has already undergone a chemical change. Which of the following
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B. Rotten orange is the correct answer. Hope this helps!
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How many moles of oxygen atoms are in 7.9E-1 moles of CO_2
Ilya [14]

Answer:

The number of moles of O atom in (7.9\times10^{-1}) mol of CO_{2} = 1.6

Explanation:

1 molecule of CO_{2} contains 2 atoms of O

So, (6.023\times 10^{23}) molecules of  CO_{2} contains (2\times6.023\times10^{23}) atoms of O.

We know that 1 mol of an atom/molecule/ion represents 6.023\times10^{23} numbers of atoms/molecules/ions respectively.

So, (6.023\times 10^{23}) molecules of  CO_{2} is equal to 1 mol of CO_{2}.

(2\times6.023\times10^{23}) atoms of O is equal to 2 moles of O atom.

Hence, 1 mol of CO_{2} contains 2 moles of O atom.

Therefore, (7.9\times10^{-1}) mol of CO_{2} contains (2\times7.9\times10^{-1}) moles of O atom or 1.6 moles of O atom.

3 0
3 years ago
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