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Anton [14]
3 years ago
11

PLEASE HELP ME ITS DUE TODAY!!!

Chemistry
2 answers:
katovenus [111]3 years ago
7 0
D. African plate I gave you true answer
vova2212 [387]3 years ago
5 0
D. The African Plate
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Andre45 [30]

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Fossils: 3.5 billion.  Rocks: 4.28 billion

they were found during Haden Eon

Explanation:

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Does a animal cell have a cell wall and chloroplasts
sergiy2304 [10]

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Animal cells have centrosomes (or a pair of centrioles), and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not.

4 0
3 years ago
If an object has a density of 4.2 g/mL, what is its density in hg/L?
alekssr [168]

I believe "h" stands for hecta-, which means "one hundred."

I will convert from g to hg (divide by 100), then from mL to L (multiply by 1000).

\frac{4.2g}{mL}*\frac{1hg}{100g}*\frac{1000mL}{1L}=42\frac{hg}{L}

4 0
3 years ago
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How many grams of sodium nitrate does it take to get 3.5% sodium nitrate in a 250g solution?
Sliva [168]
What are your options for answers?

7 0
4 years ago
How many grams of Pb are there in a sample of Pb that contains 1.15×1024 atoms? grams
Ipatiy [6.2K]
<h3>Solution:</h3>

\text{mass of Pb = 1.15 × 10²⁴ Pb atoms} × \frac{\text{1 mol Pb}}{\text{6.022 × 10²³ Pb atoms}} × \frac{\text{207.2 g Pb}}{\text{1 mol Pb}}

\boxed{\text{mass of Pb = 396 g}}

5 0
3 years ago
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