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bazaltina [42]
3 years ago
7

What did Henry Moseley determine that contributed to understanding the

Chemistry
1 answer:
stepladder [879]3 years ago
3 0

Answer:

the correct answer is B) that each element has a different of protons

Explanation:

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What coefficient for O2 demonstrates the law of conservation of mass?
olga2289 [7]

Answer:

2

Explanation:

The coefficient for O is 2 and this is an example of a combustion reaction. With the help of the coefficient 2 infront of oxygen, this equation now demonstrates law of conservation of mass.

6 0
3 years ago
What are the atomic number and mass number of this atom
lina2011 [118]
No diagram is given therefore I cannot answer however, use this for reference.
The atomic mass of an atom would be the number of protons PLUS the number of neutrons. Because this atom shown has 6 protons and 6 neutrons, they add up to 12. In this case, the atomic mass of this atom is 12. Atomic number is the number of protons in an atom, in this case it is 6. The atomic number is 6.

5 0
3 years ago
PLEASE HELP this is chemistry 12 points
Inessa05 [86]

Answer:

6.791

Explanation:

For proper significant figures with addition, you would use the significant figures of the number with lowest decimal place.  6.298 goes to the 10⁻³ place.  0.492712 goes to the 10⁻⁶ place.  You will go out to the 10⁻³ place.

6.298 + 0.492712 = 6.790712 ≈ 6.791

8 0
3 years ago
How many primary,secondary and Tertiary carbons are in the compound. 2,3-dimethyl pentane. And
r-ruslan [8.4K]

Answer:

5 primary carbon atoms

3 secondary carbon atoms

4 tertiary carbon atoms

6 hydrogen atoms

6 0
3 years ago
Why is acid important for digestion
Troyanec [42]

Answer:

activating digestive enzymes, and making ingested proteins unravel so that digestive enzymes break down the long chains of amino acids

5 0
3 years ago
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