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3 years ago

30 POINTS!!!!-

Chemistry

2 answers:

murzikaleks [220]3 years ago

7 0

Answer:

C: It is the difference between the total kinetic and potential energy in a system

Explanation:

Potential energy is stored energy while kinetic energy is the energy of motion.... This is not the same as the object's total energy, which would be the sum of all forms of its energy, including thermal, chemical and so on. The type of potential energy stored in molecular bonds is a form of energy called chemical energy.

Hope this helps

azamat3 years ago

5 0

Answer:

Explanation:

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The human body excretes nitrogen in the form of urea, NH₂CONH₂. The key step in its biochemical formation is the reaction of wat

Misha Larkins [42]

Mass perventage of nitrogen in urea, arginine, ornithine is 46.67%, 32.2%,21% respectively.

What is Mass perventage ?

Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100.

Molecular mass of urea (NH2CONH2) is= 2× (Atomic mass of N ) + 4 × (Atomic mass of H) + (Atomic mass of C) (Atomic mass of O) = 60

Mass percentage of N = $Total mass of N atoms in the compoundMass of compound×100=2860×100=46.67%$

chemical formula for arginine is C6H14N4O2

molar mass of C6H14N4O2=174g/mol

moles of N atoms in C6H14N4O2=4

mass of N atoms=14*4=56g

mass percent of N in C6H14N4O2=(56/174)*100=32.2%

the chemical formula for ornithine is C5H12N2O2

molar mass of C5H12N2O2=132g/mol

moles of N atoms in C5H12N2O2=2

mass of N atoms in C5H12N2O2=2*14=28

mass percent of N in C5H12N2O2=(28/132)*100=21%

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7 0

1 year ago

Perform the following operationand express the answer inscientific notation.7.00x10^5 - 5.00x10^4

11Alexandr11 [23.1K]

Taking into account the scientific notation, the result of the subtraction is 6.5×10⁵.

<h3>Scientific notation</h3>

First, remember that scientific notation is a quick way to represent a number using powers of base ten.

The numbers are written as a product:

a×10ⁿ

where:

a is a real number greater than or equal to 1 and less than 10, to which a decimal point is added after the first digit if it is a non-integer number.
n is an integer, which is called an exponent or an order of magnitude. Represents the number of times the comma is shifted. It is always an integer, positive if it is shifted to the left, negative if it is shifted to the right.

<h3 /><h3>Subtraction in scientific notation</h3>

You want to subtract two numbers in scientific notation. It should be noted that when the numbers to be added do not have the same base 10 exponent, the base 10 power with the highest exponent must be found. In this case, the highest exponent is 5.

Then all the values are expressed as a function of the base 10 exponent with the highest exponent. In this case: 5.00×10⁴=0.500×10⁵

Taking the quantities to the same exponent, all you have to do is subtract what was previously called the number "a". In this case:

7.00×10⁵ - 0.500×10⁵= (7.00- 0.500)×10⁵= 6.5×10⁵

Finally, the result of the subtraction is 6.5×10⁵.

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3 0

1 year ago

What is the volume of a weather balloon that has 39 grams of helium with a density 0.017 g/mL?

olchik [2.2K]

Answer:

<h3>The answer is 235.29 mL</h3>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

$volume = \frac{mass}{density} \\$

From the question.

density = 0.017 g/mL

mass = 4 g

We have

$volume = \frac{4}{0.017} \\ = 235.2941176...$

We have the final answer as

Hope this helps you

4 0

2 years ago

The surface rocks on Venus are similar to ______ rocks on Earth.

alexandr1967 [171]

D. granitic

*+.*+.*+.*+.

6 0

2 years ago

What is the correct way to smell a chemical

exis [7]

Answer:

If you need to smell the odor of a chemical, waft or fan the fumes toward your nose with one hand. Do not put your nose over the container and inhale the fumes.

Do not touch, eat, or smell any chemical unless instructed to do so. ... Hold chemical containers away from your body. Carefully check the label on the bottle before using its content.

8 0

3 years ago

Read 2 more answers