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3 years ago

What is the measure of a quantity of energy

Chemistry

2 answers:

Wewaii [24]3 years ago

4 0

Answer:

The quantities of energy in one unit can always be transformed into any other unit of energy like one gram calorie is equal to 4.186 joules that are, used to determine heat energy. Most of the individuals know about kilogram calories that are usually used to determine the energy accessible in food. 1 calorie refers to the concentration of energy required to elevate the temperature of 1 kg of water by 1 degree C.

Alika [10]3 years ago

3 0

https://goo.gl/search/What+is+the+measure+of+a+coantity+in+energy

How Is Energy Measured? | QUEST | KQED Science Quantities of energy given in one unit can always be converted to any other unit of energy. For example, 1 gram calorie is equivalent to 4.186 joules, which is used to measure heat energy. Many people are familiar with kilogram calories, which are often used to measure the energy available in food.

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nirvana33 [79]

I believe the answer is C !

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2 years ago

What concentrations of acetic acid (pKa = 4.76) and acetate would be required to prepare a 0.15 M buffer solution at pH 5.0? Not

Leni [432]

Answer:

Acetic acid 0,055M and acetate 0,095M.

Explanation:

It is possible to prepare a 0,15M buffer of acetic acid/acetate at pH 5,0 using Henderson-Hasselblach formula, thus:

pH = pka + log₁₀ [A⁻]/[HA] -Where A⁻ is acetate ion and HA is acetic acid-

Replacing:

5,0 = 4,76 + log₁₀ [A⁻]/[HA]

1,7378 = [A⁻]/[HA] (1)

As concentration of buffer is 0,15M, it is possible to write:

[A⁻] + [HA] = 0,15M (2)

Replacing (1) in (2):

1,7378[HA] + [HA] = 0,15M

2,7378[HA] = 0,15M

[HA] = 0,055M

Thus, [A⁻] = 0,095M

That means you need acetic acid 0,055M and acetate 0,095M to obtain the buffer you need.

i hope it helps!

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3 years ago

If 7.4 moles of carbon dioxide is produced in this reaction, how many moles of oxygen gas would be needed?

Nimfa-mama [501]

Answer:

11.6 mol O₂

Explanation:

C₇H₁₆ + 11 O₂ → 7 CO₂ + 8 H₂O

In order to solve this problem we need to convert moles of carbon dioxide (CO₂) into moles of oxygen gas (O₂). To do so we'll use a conversion factor containing the stoichiometric coefficients of the balanced reaction:

7.4 mol CO₂ * $\frac{11molO_2}{7molCO_2}$ = 11.6 mol O₂

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2 years ago

ASAP

Nadya [2.5K]

Answer:

12 %

Explanation:

Produces 15 J of work for input 125 J

15/125 * 100% = 12%

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1 year ago

What are the moles of silver metal produced from 0.0999 mol of copper?

julia-pushkina [17]

Answer:

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2 years ago