3 years ago

So.....I need help!! Not sure if it would be A or C....

Chemistry

1 answer:

Ad libitum [116K]3 years ago

5 0

The greenhouse effect is when gasses in the atmosphere trap in heat, thus heating the earth; so the answer would be A

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chubhunter [2.5K]

Answer:

0.0038 M

Explanation:

Hardness of the water is generally due to the presence of $CaCO_3$ in water.

At equivalence point

Moles of $Ca^{2+}$ = Moles of EDTA

Considering

$Molarity_{Ca^{2+}}\times Volume_{Ca^{2+}}=Molarity_{EDTA}\times Volume_{EDTA}$

Given that:

$Molarity_{EDTA}=0.020\ M$

$Volume_{EDTA}=4.86\ mL$

$Volume_{Water\ or\ Ca^{2+}}=25.00\ mL$

So,

$Molarity_{Ca^{2+}}\times 25=0.020\times 4.86$

$Molarity_{Ca^{2+}}=0.0038\ M$

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3 years ago

How did Wegener work out what Pangea looked like?

spayn [35]

Answer:

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Explanation:

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3 years ago

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grandymaker [24]

Answer:

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Explanation:

See attached table

Convert each of the masses into moles by dividing the mass by the molar mass of that element. That yields 3.83 moles of C and 6 moles of O. I rounded up the C to 4 moles to result in an empirical formula of C4H6

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What causes the volume to change in gases? (choose all that apply)

RUDIKE [14]

Answer:

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Fynjy0 [20]

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