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Evgen [1.6K]
3 years ago
9

Of the​ rock's original​ uranium-235 remains. how old is the​ rock

Chemistry
1 answer:
Gemiola [76]3 years ago
5 0
2.1 billion years
2,139,000,000 to be exact
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Which of the following is an important difference between climate and weather?
ANEK [815]

A

Explanation:

Weather can be defined as the day-to-day changes in the atmospheric parameters like temperatures, humidity,  rainfall, and pressure. When these weather changes are observed for approximately over 30 years, the climate of the regions can be determined by understanding the patterns.

5 0
3 years ago
Please help! Thanks
trapecia [35]

Th actual yield of the reaction is 24.86 g

We'll begin by calculating the theoretical yield of the reaction.

2Na + Cl₂ → 2NaCl

Molar mass of Na = 23 g/mol

Mass of Na from the balanced equation = 2 × 23 = 46 g

Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol

Mass of NaCl from the balanced = 2 × 58.5 = 117 g

From the balanced equation above,

46 g of Na reacted to produce 117 g of NaCl.

Therefore,

11.5 g of Na will react to produce = (11.5 × 117) / 46 = 29.25 g of NaCl.

Thus, the theoretical yield of NaCl is 29.25 g.

Finally, we shall determine the actual yield of NaCl.

  • Percentage yield = 85%
  • Theoretical yield = 29.25 g
  • Actual yield =?

Actual yield = Percent yield × Theoretical yield

Actual yield = 85% × 29.25

Actual yield = 0.85 × 29.25 g

Actual yield = 24.86 g

Learn more about stoichiometry: brainly.com/question/25899385

7 0
2 years ago
What is the charge of an electron<br> A. -1<br> B. 0<br> C. +1<br> D. +2
Gelneren [198K]

Answer:

A

Explanation:

I believe it is negative 1.

6 0
3 years ago
What is the difference between a strong acid and a weak acid?
olasank [31]
The answer to this is C.
4 0
3 years ago
How does the overall charge of oxygen of -16 compare to the overall charge of oxygen -17 and oxygen -18?
nadezda [96]

Answer:

-2

The charge on an oxygen ion is -2. An oxygen atoms contain six electrons in its valence electron shell.

Explanation:

5 0
2 years ago
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