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Bogdan [553]
3 years ago
14

What do you mean by chemical reaction ?​

Chemistry
1 answer:
kherson [118]3 years ago
6 0

A chemical reaction is a reaction that changes the molecular structure and is normally irreversible.

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describe the" fear appeal" and how it's used in public messaging. Give an example or create your own public health message using
Vsevolod [243]
A good example is cigarretes they try to scare you into not smoking by telling you all of the downsides of smoking like lung cancer and i guess that would be fear appeal 
7 0
3 years ago
What temperature would 3.54 moles of xenon gas need to reach to exert a pressure of 1.57 atm at a volume of 34.6 l
ira [324]

Answer:

186.9Kelvin

Explanation:

The ideal gas law equation is PV = n R T

where

P   is the pressure of the gas

V   is the volume it occupies

n  is the number of moles of gas present in the sample

R  is the universal gas constant, equal to  0.0821 atm L /mol K

T  is the absolute temperature of the gas

Ensure units of the volume, pressure, and temperature of the gas correspond to R ( the universal gas constant, equal to  0.0821 atm L /mol K )

n = 3.54moles

P= 1.57

V= 34.6

T=?

PV = n R T

PV/nR = T

1.57 x 34.6/3.54 x 0.0821

54.322/0.290634= 186.908620464= T

186.9Kelvin ( approximately to 1 decimal place)

5 0
3 years ago
What is the chemical formula for Salt and hydrogen gas?
marshall27 [118]
Salt: NaCl
Hydrogen gas: H2
3 0
2 years ago
Fill in the chart to describe and give examples of physical changes.
frosja888 [35]

Answer:

here are some examples of physical change!!!

Explanation:

-An ice cube melting into water in your drink.

-Freezing water to make ice cubes.

-Boiling water evaporating.

-Hot shower water turning to steam.

-Steam from the shower condensing on a mirror.

8 0
3 years ago
Read 2 more answers
How mant low dose 81mg aspirin tablets can be made from 1.21 kg of aspirin​
KiRa [710]

Answer:

14,938 tablets.

Explanation:

WE divide:

1.21 kg / 81 mg

1.21 kg = 1,210 g = 1.210,000 mg.

So it is 1,210,000 / 81

= 14,938 tablets.

3 0
3 years ago
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