3 years ago

Which atom can accommodate an octet of electrons but doesn't necessarily have to?

1 answer:

3 0

<span>Boron is the atom that can accommodate an octet of electrons but does not necessarily have to do so. Boron can also be noted by its chemical symbol, the letter B.</span><span />

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To practice Problem-Solving Strategy 11.1 Energy efficiency problems. Suppose that you have left a 200-mL cup of coffee sitting

Illusion [34]

Answer:

efficiency of heating with this oven is 51 %

Explanation:

to raise the temp of 200 ml of coffee from 30°C to 60°C the energy input to microwave oven is:

1100 J/s x 45 = 49,500 J

AT 100% efficiency

For 1°C the energy required to raise the temperature of 1 ml = 4.2 J

So for 30 C°, 1°C the energy required to raise the temperature of 200 ml =

Q = (4.2) (200)(30) = 25,200 J

efficiency = 25,200/49,500 = 0.51 = 51%

6 0

3 years ago

Read 2 more answers

How much heat is absorbed during production of 136 g of NO by the combination of nitrogen and oxygen?

MaRussiya [10]

100.3kcal of heat will be absorbed. 2moles of NO absorb 43kcal. I mole of NO weighs 14 +16 = 30g so 2 moles weigh 60g. So 60g absorb 43kcal So 1g absorb 43/60 kcal So 136g absorb (43/60) x 136 = 97.47 kcal

8 0

3 years ago

A. draw the structure of the tetrahedral intermediate initially formed in the reaction shown. you do not have to consider stereo

julsineya [31]

The reaction is shown below, Acid protonates the carbonyl oxygen and makes the carbonyl carbon more electrophilic. Water attacks on activated carbonyl group and forms a tetrahedral intermediate.

Intermediate:
Structure of Intermediate is shown both in 2-D and 3-D (below attached).

Carbonyl group is regenerated with the elimination of ethanol.

Reaction is as below, The final product is carboxylic acid.