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algol [13]
3 years ago
11

How has the work of chemists affected the environment?

Chemistry
2 answers:
grandymaker [24]3 years ago
6 0

hopefully you get the write answer im guessing its letter D

Alexandra [31]3 years ago
5 0

Answer:

answer is c i just took the quiz

Explanation:

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A balloon filled with helium occupies 21.0ft³ at 55.0°F. Find the temperature of the helium if the volume of the balloon decreas
harkovskaia [24]

Answer:

Assuming pressure is held constant,the question reduces to a ratio and proportion type of question where;

At constant pressure,

21.0ft³-55.0°F

11.0fy³=11.0ft³/21.0ft³×55°F

The temperature is 28.809°F≈29°F

6 0
3 years ago
Which of the following most likely happens during a physical change?
Svetlanka [38]

Answer:

A. New atoms are introduced in the molecules of the substance.

Explanation:

Pls, Pls, Pls can I have brainliest? I need 1 more brainliest to lvl up to expert

4 0
3 years ago
Read 2 more answers
How is stoichiometry used to calculate amount of product from amount of reactant?
Nadusha1986 [10]

Answer:

D. The coefficients give the ratio of mole reactant to moles product.

Explanation:

In stoichiometric calculations, the amount of product formed from reactants can be determined.

  • Using this approach, the number of moles of reactants and products on both sides of the expression must be balanced.
  • As a rule of thumb, the coefficients give the ratio of moles of reactants to moles of products.
  • This is very useful in a number of calculations using the stoichiometric approach.
5 0
3 years ago
A Punnett square without the genotypes of the parents is shown below.
hammer [34]

Answer:

Genotype of parents is CC and Cc

Explanation:

Please see the attachment

8 0
3 years ago
How many oxygen molecules in 2.3x10-⁸g of molecular oxygen ​
cluponka [151]

Answer:

6.321 × 10^22

Explanation:

Mass of Oxygen =

3.36

g

Molar mass of oxygen (

O

2

) = 16 x 2 =

32

g

m

o

l

−

Total molecules in oxygen = Mass in grams/Molar mass x

N

A

=

3.36

32

x

6.02

x

10

23

=

6.321

x

10

22

Note:

N

A

(Avagadro's number) =

6.02

x

10

23

Hope it helps...

3 0
3 years ago
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