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Natasha_Volkova [10]
2 years ago
13

I NEED HELP ASAP!!!!!!!!!!!! WITHIN THE HOUR Thanks

Chemistry
1 answer:
marta [7]2 years ago
7 0

Answer:

A. O, S, Se

Explanation:

They are all considered "other nonmetals," found in row 16 of the periodic table, and are chalcogens. The other options don't have as much in common.

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Hydrofluorocarbons (HFC) have replaced chlorofluorocarbon gases (CFC) in refrigerators.
g100num [7]

Answer: 98.36g/mol

Explanation:Please see attachment for explanation

7 0
4 years ago
NEED HELP FAST
andre [41]

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Explanation:

6 0
3 years ago
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As a roller coaster is going UP the first hill, what is happening to the KE?
SpyIntel [72]

Explanation:

It should be decreasing, and the potential energy increasing, since Law of Conversation of Energy, right?

Also, if you think about what happens when it goes down, it loses potential and gains kinetic, so maybe the opposite should happen when it goes up.

7 0
3 years ago
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You need to determine the mass of an aqueous solution. You determine the mass of your 10.0 mL graduated cylinder to be 23.099 g.
Diano4ka-milaya [45]

The mass of the aqueous solution in grams is obtained by subtracting mass of the 10.0 mL graduated cylinder alone from  the mass of the cylinder + solution. Therefore mass of the solution is 2.951 g.

We have from the question, the following information;

Mass of empty 10.0 mL graduated cylinder to be 23.099 g

Mass of 10.0 mL graduated cylinder +  3.09 mL of solution to be 26.050g

Mass of aqueous solution in grams = mass of the cylinder + solution - mass of the 10.0 mL graduated  cylinder alone

= 26.050g - 23.099 g

= 2.951 g

Learn more: brainly.com/question/5048248

6 0
3 years ago
How many moles of carbon atoms are combined with 11.2 moles of hydrogen atoms in a sample of the compound, C3H8?
lozanna [386]
The compound with a chemical formula of C₃H₈ is propane. The subscripts actually represent the number of the individual atoms in 1 particle of the compound. Since there are the same number of atoms per mole of any substance, the subscript can also represent the moles. Through stoichiometric calculations, the solution is as follows:

Moles of Carbon = 11.2 moles H * 3 mol C/8 mol H = <em>4.2 moles</em>
4 0
3 years ago
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