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3 years ago

Calculate the [H+] for (a) black coffee with a pH of 3.59

Chemistry

1 answer:

astraxan [27]3 years ago

7 0

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Chemists recognize many different elements, such as gold, or oxygen, or carbon. Suppose you got some carbon, and started splitti

Otrada [13]

Answer:

An Atom.

Explanation:

An atom is the smallest particle of a chemical element that can exist. It the fundamental piece of matter. Therefore, splitting carbon into smaller pieces , the smallest piece that would still be called "carbon" would be an Atom of carbon. However, atom is also made of three subatomic particles called electrons, protons and neutrons.

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3 years ago

Q1. If a piece of ice absorbs 131 J of heat energy, how much was lost by the surroundings?

Rashid [163]

Answer:

Explanation:

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3 years ago

What is meant by the statement ' protential difference between point A and Point B in an electric circuit is 1 V' ?

liubo4ka [24]

Answer:

The potential difference is considered as the change in terms of voltage or Del V. It is measured in terms of voltage so that statement got the name voltage change between point A & B is 1. It means that I joule of work is carried out for moving the 1 coulomb of charge from the point A to B.

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2 years ago

7. Which statement correctly describes the density of Earth's mantle compared to the density of Earth's

Mice21 [21]

Answer:

1) the mantle is less dense than the core but more dense than the crust.

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3 years ago

A sample of oxygen occupies 20.1 liters under a pressure of 1520 torr at 25.0o What volume would it occupy at 25.0oC if the pres

Zolol [24]

Answer:

The volume that the sample of oxygen would occupy at 25 ° C if the pressure were reduced to 760.0 torr is 40.2 L

Explanation:

Boyle's law establishes the relationship between the pressure and the volume of a gas when the temperature is constant, so that the pressure of a gas in a closed container is inversely proportional to the volume of the container. That is, if the pressure increases, the volume decreases, while if the pressure decreases, the volume increases.

Boyle's law is expressed mathematically as:

Pressure * Volume = constant

or P * V = k

Considering an initial state 1 and a final state 2, it is true:

P1* V1= P2*V2

In this case:

P1= 20.1 L
V1= 1520 torr
P2= 760 torr
V2= ?

Replacing:

20.1 L* 1520 torr= 760 torr* V2

Solving:

$V2=\frac{20.1 L* 1520 torr}{760 torr}$

V2= 40.2 L

The volume that the sample of oxygen would occupy at 25 ° C if the pressure were reduced to 760.0 torr is 40.2 L

4 0

3 years ago