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3 years ago

Why do you think dark surfaces absorb radiation better than light surfaces?

1 answer:

7 0

Your answer→ <em>The lighter side absorbs less of the incident light, reflecting some of the energy. Darker materials also emit radiation more readily than light-colored materials, so they cool faster.</em>

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Which statement describes what happens to the DNA in the process shown? A. Some of the DNA is destroyed, so each daughter cell h

kolbaska11 [484]

hhjjjbvhjbvb

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3 years ago

A 0.1326 g sample of magnesium was burned in an oxygen bomb calorimeter. the total heat capacity of the calorimeter plus water w

Sladkaya [172]

Answer: Th enthalpy of combustion for the given reaction is 594.244 kJ/mol

Explanation: Enthalpy of combustion is defined as the decomposition of a substance in the presence of oxygen gas.

W are given a chemical reaction:

$Mg(s)+\frac{1}{2}O_2(g)\rightarrow MgO(s)$

$c=5760J/^oC$

$\Delta T=0.570^oC$

To calculate the enthalpy change, we use the formula:

$\Delta H=c\Delta T\\\\\Delta H=5760J/^oC\times 0.570^oC=3283.2J$

This is the amount of energy released when 0.1326 grams of sample was burned.

So, energy released when 1 gram of sample was burned is = $\frac{3283.2J}{0.1326g}=24760.181J/g$

Energy 1 mole of magnesium is being combusted, so to calculate the energy released when 1 mole of magnesium ( that is 24 g/mol of magnesium) is being combusted will be:

$\Delta H=24760.181J/g\times 24g/mol\\\\\Delta H=594244.3J/mol\\\\\Delta H=594.244kJ/mol$

4 0

3 years ago

The transfer of heat by the movement of heated fluid is called conduction. Please select the best answer from the choices provid

ella [17]

I would suppose it is false because conduction is the movement of heat between two objects that are in contact.

8 0

3 years ago

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A scientist was asked to test the effect of a new vitamin for rats. His hypothesis was that young rats that had vitamins added t

Olin [163]

A: incorrect because there will be no effect on keeping the rats in separate cage in the same room at the time of the experiment.

C: incorrect because it's depend upon scientist whether he wants to record the observation on the graph or on the table. Thus, no affect will be caused on the observations.

D: incorrect because peer review is done only after the experiment is completed.

Thus, statement B is correct because the growth graph of male and female of any species is different. Male tend to grow more than their female counterparts. So, for the process of the study it is essential that all the rats included are either male or female.

Hence, option (B) is correct.

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3 years ago

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What is the molecular formula for C3H2N?

NNADVOKAT [17]

It is empirical formula

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3 years ago

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