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suter [353]
3 years ago
8

The properties of the hydrogen atom form the basis for all life. True False

Chemistry
2 answers:
Maurinko [17]3 years ago
6 0
False, the hydrogen atom does not form the basis for all life.
suter [353]3 years ago
4 0
I think it is false
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What is the value of x in the measure of the angle?
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It is 14, plug it in or use inverse equations. Since they're vertical angles they are the same value. 41 = 2x+13, 28 = 2x (subtract 13), 14 = x (divide by 2).
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Balancing Chemical Equation<br> H2=N2=NH3
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Answer:

3H2=N2= 2NH3

Explanation:

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What is light tell definition ​
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1..the natural agent that stimulates sight and makes things visible.

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2 years ago
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Air is comprised predominantly of nitrogen (N2) and oxygen gas. The ambient air in this room contains about 0.28g of oxygen (O2)
viktelen [127]

Answer:

190 g

Explanation:

Knowing that:

  • O₂ gas in air: 0.28 g O₂ / L of air
  • Air inhaled at rest: 19.3 fl.oz. air / breath
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The grams of oxygen gas (O₂) that a human at rest inhales in 1 hour (60 minutes) will be calculated as:

grams of O₂ = breaths in 1 hour * air inhaled per breath * amount of O₂ in air

grams O_{2} = 60 min* 20 \frac{breath}{min} * 19.3 \frac{fl.oz. air}{breath} * \frac{1 L}{33.814 fl.oz.} * 0.28 \frac{g O_{2} }{L}

grams of O₂ = 191.78 g

190 g of O₂ are inhaled in 1 hour (written in correct number of significant figures)

*In the calculation the amount of air inhaled per breath was converted from fl.oz. to Liters knowing that <em>1 L = 33.814 fl.oz.</em>

7 0
3 years ago
How many significant figures are in 100 L?
Sergeu [11.5K]

Answer:

It’s ambiguous (trailing zeros for a number without a decimal point may or may not be significant), but absent additional information I would say that it has one significant figure: the leading digit 1. The trailing zeros serve only to scale the number, not to add significant figures.

This is according to the usual rules for determining significant figures:

* Non-zero digits are always significant.

* Any zeros between two significant digits are significant.

* A final zero or trailing zeros in the decimal portion ONLY are significant.

Explanation:

Note that the term significant figures only makes sense when there is uncertainty involved (such as with a measurement result). As a mathematical number, 100 (or any other number) is an exact quantity and the concept of significant figures doesn’t apply.

If you want the measurement to be 100 with three significant figures (implying an uncertainty of ±0.5 ), you could write it as 100. (with a trailing decimal point) or, less subtly, as 1.00×102 , or (even better) with an explicit uncertainty such as 100±0.5 or “100 to three significant figures".

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3 years ago
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