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RUDIKE [14]
3 years ago
15

How many significant digits are in the volume measurement 4010,0 mL? A) 2 B) 3 C) 4 D) 5 E) none of the above

Chemistry
1 answer:
Lapatulllka [165]3 years ago
5 0

Answer: Option (D) is the correct answer.

Explanation:

Significant digits are defined as the digits which contribute meaning to the resolution of a number.

For example, if a digit is 40.0 ml then zero placed after the decimal point is not considered a significant because it doesn't contribute any value to the total quantity or number.

But zero placed in 40 will be considered significant because it tells us the number is forty. Hence, in 40.0 there are only 2 significant digits.

Similarly, in 4010,0 mL there are in total 5 significant digits.

Thus, we can conclude that there are 5 significant digits in the volume measurement 4010,0 mL.

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5 0
2 years ago
1. How is the modern periodic table organized?
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1. How is the modern periodic table organized?  Increasing atomic number

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3 0
3 years ago
Most reactions, including enzyme-catalyzed reactions, proceed faster at higher temperatures. However, for a given enzyme, the ra
Tju [1.3M]

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It has denatured

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7 0
3 years ago
Solid aluminum and gaseous oxygen read in a combination reaction to produce aluminum oxide. 4Al(s) + 3O_2(g) rightarrow 2Al_2O_3
Kryger [21]

Answer:

4.7 g. Option 5 is the right one.

Explanation:

4Al(s) + 3O₂ (g) ⇄ 2Al₂O₃ (s)

We convert the mass of reactants to moles, in order to determine the limiting.

2.5 g Al / 26.98 g/mol → 0.092 moles of Al

2.5 g O₂ / 32g/mol → 0.078 moles of O₂

Ratio is 4:3. 4 moles of Al react with 3 moles of O₂

Then, 0.092 moles of O₂ would react with (0.092 . 3)/ 4 = 0.069 moles O₂

We have 0.078 moles of O₂ and we need 0.069 moles, the oxygen is the limiting in excess. Therefore the Al is the limiting reactant.

Ratio is 4:2. 4 moles of Al, can produce 2 moles of Al₂O₃

Then, 0.092 moles of Al would produce (0.092 .2) / 4 = 0.046 moles

If we convert the moles to mass, we find the anwer:

0.046 mol . 101.96 g/mol = 4.69 g

5 0
3 years ago
Need help with this.
Kay [80]

Answer:

Explanation:

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7 0
2 years ago
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