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4 years ago

Which volume measurement is expressed in four significant figures?

Chemistry

2 answers:

Inessa [10]4 years ago

8 0

I'm just guessing but I think 5,500 because significant figures are whole numbers

Kazeer [188]4 years ago

5 0

Answer:

Explanation:

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Why does diamond have a very high melting point?

xenn [34]

idk :) .... ........ .......

3 0

3 years ago

the pressure of 8.4 of nitrogen gas in a flexible container is decreased to one-half its original size

lutik1710 [3]

The new volume is 33.6 L.

<h3>What is volume?</h3>

Volume can be described as a measure of occupied three-dimensional space.

From the question above, we obtain the following data:

Initial volume (V1) = 8.40 L L

Initial pressure (P1) = P

Initial temperature (T1) = T

Final pressure (P2) = one-half the original pressure = ½P

Final temperature (T2) = double the original temperature = 2T

Final volume (V2) = what?

The new volume can be obtained by using the universal gas law;

P1V1/ T1 = P2V2 /T2

P × 8.40 / T = ½P × V2 /2T

P × 8.40 / T = P × Volume 2 / 4T

Cross multiply

T × P × Volume 2 = P × 8.40 × 4T

Divide both side by T × P

Volume 2 = (P × 8.40 × 4T) /T × P

Volume 2 = 8.40 × 4

Volume 2 = 33.6 L

Thus, the new volume of the gas is 33.6 L.

Learn more about volume at: brainly.com/question/463363

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3 0

1 year ago

Thermodynamics and Q<br> How much energy is needed to heat 40.5g of water from 15.6°C to 73.0°C

Katyanochek1 [597]

Answer:

9717.246 J

Explanation:

From the question given above, the following data were obtained:

Mass (m) of water = 40.5 g

Initial temperature (T₁) = 15.6 °C

Final temperature (T₂) = 73 °C

Specific heat capacity (C) of water = 4.18 J/gºC

Heat (Q) =.?

Next, we shall determine the change in the temperature of water. This can be obtained as follow:

Initial temperature (T₁) = 15.6 °C

Final temperature (T₂) = 73 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 73 – 15.6

ΔT = 57.4 °C

Finally, we shall determine the heat energy required. This can be obtained as follow:

Mass (m) of water = 40.5 g

Specific heat capacity (C) of water = 4.18 J/gºC

Change in temperature (ΔT) = 57.4 °C

Heat (Q) =.?

Q = MCΔT

Q = 40.5 × 4.18 × 57.4

Q = 9717.246 J

Thus, the heat energy required is 9717.246 J

3 0

3 years ago

What are compounds????????????????

sweet [91]

Answer:

Compounds are pure substance consisting of two or more different atoms

8 0

3 years ago

Read 2 more answers

Before we begin, let's first establish an understanding of basic terminology It may be harder than you think lo clearly define w

pentagon [3]

Answer:

oranges: contains chemical

heat: neither

sunlight: neither

photosynthesis: chemical reaction

bleaching protein: contains chemical

neutralization: chemical reaction

combustion: chemical reaction

vitamin K: contains chemical

rainbow: neither

marble: contains chemical

Explanation:

A chemical is a substance that is used in or made by chemical reactions. It is a matter with compositions related to the science of chemistry. In the question,

- orange contains chemical like vitamins, protein molecules etc.

- Bleaching protein contains chemicals that bring about the bleaching process.

- Vitamin k contains chemical elements

- marble contains Calcium, oxygen etc elements

A chemical reaction is that which involves the change in chemical properties of involved substances.

- Photosynthesis is the chemical reaction between carbon dioxide and water in the presence of sunlight to give glucose.

- Neutralization is the chemical reaction where an acid neutralizes a base to form a salt and water molecule.

- Combustion is the chemical reaction involving the burning of a chemical substance.

Some substances like sunlight, heat and rainbow are neither a chemical or chemical reaction.

3 0

3 years ago