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____ [38]
3 years ago
14

Greg rollerblades 35 meters in 12 seconds. What is his speed?

Chemistry
1 answer:
zheka24 [161]3 years ago
7 0

Answer:

2.916

Explanation:

because the equation for speed is distance divided by time

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How many moles are in 272 grams of hydrogen peroxide (H2O2) ?
Strike441 [17]

Answer:

8 moles

Explanation:

When we are asked to convert from grams of a substance into moles, we have to use the substance's molar mass.

Meaning that for this problem, we'll <em>use the molar mass of hydrogen peroxide</em> (H₂O₂), as follows:

  • 272 g ÷ 34 g/mol = 8 mol

There are 8 moles in 272 grams of hydrogen peroxide.

7 0
2 years ago
Molarity of 2%W/V of NaOH is
TiliK225 [7]
Assume it is 1 litre and weighs 1kg.
2 percent of 1 kg is 20g.
20g divided by molar mass of NaOH.
20g divide by 40 = 0.5 mole
0.5 mole in a litre would be 0.5M
That is the answer: 0.5M
6 0
3 years ago
Does anyone know this one???
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Answer:

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Explanation:

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7 0
3 years ago
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ICE Princess25 [194]
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6 0
3 years ago
Aluminium and potassium nitrate will not react when mixed together?
Stels [109]

Answer:

they would react to make aluminum oxide and nitrogen

Explanation:

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7 0
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