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2 years ago

How many calories of energy will 20 grams of carbohydrates provide if 1 gram provides 4 calories?

Chemistry

2 answers:

dedylja [7]2 years ago

7 0

20 grams at 4 calories per gram.

20*4=80 Calories.

in the end, A is your answer

Bas_tet [7]2 years ago

6 0

Answer:

i already commented it but i want points anyways its 80 because 20x4 = 80. it said one gram equals 4 calories and there is 20 grams so basically 4+4+4+4+4+4+4+4+4+4+4+4+4+4+4+4+4+4+4+4

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Calculate the change in entropy of 3 moles of liquid water if you heat it from 5˚C to 95˚C. The molar heat capacity of liquid wa

IceJOKER [234]

Answer: The entropy change of the liquid water is 63.4 J/K

Explanation:

To calculate the entropy change for same phase at different temperature, we use the equation:

$\Delta S=n\times C_{p}\times \ln (\frac{T_2}{T_1})$

where,

$\Delta S$ = Entropy change

$C_{p}$ = molar heat capacity of liquid water = 75.38 J/mol.K

n = number of moles of liquid water = 3 moles

$T_2$ = final temperature = $95^oC=[95+273]K=368K$

$T_1$ = initial temperature = $5^oC=[5+273]K=278K$

Putting values in above equation, we get:

$\Delta S=3mol\times 75.38J/mol.K\times \ln (\frac{368}{278})\\\\\Delta S=63.4J/K$

Hence, the entropy change of the liquid water is 63.4 J/K

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2 years ago

There are _____ major plates that make up the most of the continents and the Atlantic and Pacific Ocean.

nasty-shy [4]

Answer and Explanation:

D) 7 is the answer

Together, the crust and the upper part of the mantle form the lithosphere, Earth's solid outer shell. This rocky, brittle layer is broken up into seven major and several minor tectonic plates (also known as lithospheric plates) that fit together like puzzle pieces.

#teamtrees #PAW (Plant And Water)

6 0

2 years ago

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1.6x10^23 lead atoms. Find the weight in grams

Ber [7]

Moles of lead(Pb) = 1.6x10^23/6.02x10^23 = 0.265 moles.

Weight of lead = moles x atomic weight of lead
= 0.265x207.2
= 54.908 grams.

Hope this helps!

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3 years ago

Write the electron configuration (ground and excited states) for element with atomic number 16 ?

Talja [164]

2, 8,6 because it has to be in a configuration of 2,8,8

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3 years ago

I will take a picture of the question

a_sh-v [17]

Answer:

yes as you wish

Explanation:

but why have u asked this

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3 years ago