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olganol [36]
2 years ago
10

How do I convert the ones circled in red? Please explain how you did it don’t just do it for me.

Chemistry
1 answer:
Nana76 [90]2 years ago
3 0

Answer:

25 centigrams is equal to 2.5 grams.

150 hectometers are 10,000 centimeters.

Explanation:

10 centigrams is equal to 0.1 gram.

25 / 10 = 2.5

1 hectometer is equal to 10,000 centimeters.

150 x 10,0000 = 1500000

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4. How many atoms are in 32.6 g of Oxygen?
Natali5045456 [20]

Hey there!

Oxygen has a molar mass of 16. That means 16g of oxygen is 1 mole.

32.6 ÷ 16 = 2.0375 moles

We have 2.0375 moles.

There are 6.022 x 10²³ atoms in one mole.

2.0375 x 6.022 x 10²³

1.3 x 10²⁴

There are 1.3 x 10²⁴ atoms in 32.6 grams of oxygen.

Hope this helps!

7 0
3 years ago
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Most oxygen in our atmosphere _____. has two oxygen atoms has three oxygen atoms combines with carbon has a single oxygen atom
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Answer:

has Two oxygen atoms

Explanation:

Oxygen is a diatomic element hence exists as O2 for majority of its existence in our atmosphere. Although small portion does exist in form of O3 which protects earth from sun's harmful ray, the majority portion of oxygen has O2 which is the oxygen we breathe.

8 0
3 years ago
When calculating specific heat, what does the variable 'Q'
mariarad [96]
The answer is AIM NOT POSTIVE
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1 year ago
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At 40 mph, how long does it take to travel 64 miles
gogolik [260]
1.5 hours
explanation: don’t have one just trust me
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The half life of potassium 40 is approximately 1.25 billion years. An igneous rock is found to contain about 1/4 of its original
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