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saveliy_v [14]
2 years ago
6

Why isn’t there anyone helping for chemistry I need this by literally tomorrow morning before 8:30 ;-;

Chemistry
2 answers:
Anon25 [30]2 years ago
6 0

Refer to the attachment

Naily [24]2 years ago
4 0

Answer:

Find it in the teacher desk by tomorrow 7:30

Explanation:

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Which of the statements about elements is true?
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1. No two elements have the same kind of atom.

Explanation:

The correct of all statement is that no two elements have the same kind of atoms.

Every element have different atoms.

  • Over a hundred elements have been identified by scientists.
  • Atoms are the smallest particles that takes part in chemical reactions.
  • Elements are distinct substances that cannot be split.
  • Atoms of all elements do not have the same mass and volume. Isotopes are examples.
  • It is true that atoms of all elements have different masses and also different volumes.
  • The volume of an atom is function of the number of electrons it contains.

learn more:

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3 years ago
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Which of the following is a combustion reaction
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A student collected a 47.5 mL sample of gas in the lab at 0.8 atm pressure and 29.00C. What volume would this gas sample occupy
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the volume would be 69.034mL

Explanation:

8 0
2 years ago
The half-life of radon gas is approximately four days. Four weeks after the introduction of radon into a sealed room, the fracti
maksim [4K]

The fraction of the original amount remaining is closest to 1/128

<h3>Determination of the number of half-lives</h3>
  • Half-life (t½) = 4 days
  • Time (t) = 4 weeks = 4 × 7 = 28 days
  • Number of half-lives (n) =?

n = t / t½

n = 28 / 4

n = 7

<h3>How to determine the amount remaining </h3>
  • Original amount (N₀) = 100 g
  • Number of half-lives (n) = 7
  • Amount remaining (N)=?

N = N₀ / 2ⁿ

N = 100 / 2⁷

N = 0.78125 g

<h3>How to determine the fraction remaining </h3>
  • Original amount (N₀) = 100 g
  • Amount remaining (N)= 0.78125 g
  • Fraction remaining =?

Fraction remaining = N / N₀

Fraction remaining = 0.78125 / 100

Fraction remaining = 1/128

Learn more about half life:

brainly.com/question/26374513

7 0
2 years ago
How are protons and neutrons similar? How are they different?
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Protons and neutrons are in the center of the atom, making up the nucleus. The charge on the proton and electron are exactly the same size but opposite. Neutrons have no charge.
3 0
2 years ago
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