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kozerog [31]
3 years ago
5

A variety of federal, state, and local laws govern

Chemistry
1 answer:
Tju [1.3M]3 years ago
5 0

dangerous waste that is improperly managed poses a serious threat to human health and the environment because it could possibly kill you or make u very sick .

Explanation:

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Which action is a change in state?​
gogolik [260]

Dissolving is your answer to this question. Becuase when something dissolves it is no longer in the same shape or state cause if something dissovles then goes away into another state.

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Why did the vinegar erupt when I put the baking soda ?
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When the chemicals combine, it creates a chemical reaction or "eruption" 
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Quick help me please
Nataly [62]
A or b I think it’s b
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How does sand cause weathering?
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4 years ago
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basketane is a hydrocarbon that is 90.8% carbon. If the molar mass is between 130-140 g/mol find the molecular formula of the co
alisha [4.7K]

Answer:

C₁₀H₁₂

Explanation:

90.8% of basketane (Hydrocarbon, contains only C and H) is Carbon, and 100-90.8 = 9.2% of the mass is hydrogen.

The molar mass is between 130-140g/mol, That means the moles of Carbon (Using its molar mass, 12.01g/mol) that are in basketane are between:

140g/mol /12.01g/mol *90.8%= 10.58 moles of C.

130g/mol / 12.01g/mol *90.8%= 9.83 moles of C.

As the moles of carbon must be given in a whole number, There are 10 moles of Carbon.

10 moles C * (12.01g / mol) = 120.1g/mol that are 90.8% of the molar mass. Molar mass of basketane is:

100% * (120.1g/mol / 90.8%) =

132.3g/mol.

The part of the molar mass due hydrogen must be:

132.3 g/mol - 120.1g/mol = 12.2 g/mol

As molar mass of hydrogen is 1g/mol, the moles of hydrogen are 12

And molecular formula is:

<h3>C₁₀H₁₂</h3>

6 0
3 years ago
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