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salantis [7]
3 years ago
13

Can someone plz help me with this one problem plzzzzz I’m being timed!!!

Chemistry
1 answer:
poizon [28]3 years ago
4 0

Answer:

answer : the penguins do

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Virty [35]

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you need only one independent variable because if not, you wont know what factors have changed your experiment.

Explanation:

3 0
2 years ago
A compound contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen (by mass). calculate the empirical formula.
Eva8 [605]
C:H:O = 40/12 : 6,7/1 : 53,3/16 = 3,33 : 6,7 : 3,33 ≈ 1 : 2 : 1

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3 0
3 years ago
If 3 moles of a compound use 12 J of energy in a reaction, what is the Hreaction in kJ/mol
igomit [66]

Answer:

\Delta _RH=4x10^{-3}\frac{kJ}{mol}

Explanation:

Hello,

In this case, the molar enthalpy of reaction is obtained by dividing the involved energy by the reacting moles:

\Delta _RH=\frac{12J}{3mol} =4\frac{J}{mol}

Thus, it is important to notice that the compound "uses" the energy, it means that it absorbs the energy, for that reason the sign is positive. Moreover, computing the result in kJ/mol we finally obtain:

\Delta _RH=4\frac{J}{mol}*\frac{1kJ}{1000J} =4x10^{-3}\frac{kJ}{mol}

Best regards.

5 0
2 years ago
Can a nonpolar molecule contain polar covalent bonds?
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What do you know about a chemical compound by looking at its chemical formula?
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The type of bonds present in the compound. and the type of structure it has and the elements that are presents and the number of moles of each element in one mole of the compound.
4 0
3 years ago
Read 2 more answers
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