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Alja [10]
4 years ago
9

How does a cell obtain energy

Chemistry
1 answer:
Molodets [167]4 years ago
3 0
A process called respiration. This process is carried out in organelles in the cell<span> called the Mitochondria.</span>
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10. Given the reaction below, which is the reduced substance? Mg + Cl2 Mg2+ + 2Cl-
atroni [7]

Answer:

2Cl-

Explanation:

When a substance is reduced, it gains electrons. Because electrons are negatively charged, the substance that is reduced will have a negative charge. 2Cl- is the substance that was reduced because it became negative.

7 0
3 years ago
How do plants differ from the desert to those that live in the tundra !?!?!?!?!
Scilla [17]

Answer:

In the desert, the climate is hot and dry, while in the tundra, it is cold and wet.

Explanation:

in the desert, plants need more water, while in the tundra, they have ice and snow

5 0
3 years ago
Write a chemical reaction depicting what happens to the salt in water.
Mekhanik [1.2K]

No chemical reaction occurs. This is due to water molecules being very polar and and pulling out the sodium and chlorine ions once fully dissolved in water.

7 0
3 years ago
Question 5 (1 point)
Aleksandr-060686 [28]

Answer : The pressure it exert under these new conditions will be, 87 atm

Explanation :

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 19 atm

P_2 = final pressure of gas = ?

V_1 = initial volume of gas = 100 L

V_2 = final volume of gas = 20 L

T_1 = initial temperature of gas = 25^oC=273+25=298K

T_2 = final temperature of gas = 0^oC=273+0=273K

Now put all the given values in the above equation, we get:

\frac{19atm\times 100L}{298K}=\frac{P_2\times 20L}{273K}

P_2=87atm

Therefore, the pressure it exert under these new conditions will be, 87 atm

5 0
3 years ago
A 1.4639-g sample of limestone is analyzed for Fe, Ca, and Mg. The iron is determined as Fe2O3 yielding 0.0357 g. Calcium is iso
alisha [4.7K]

Answer:

A) w/w % of Fe - 2.44%

B) w/w % of Mg - 4.590%

C) w/w % of Ca - 96%

Explanation:

A) w/w % of Fe in limestone as Fe2O3 = (Mass of Fe2O3 /Mass of limestone) x 100

 0.0357/1.4639 X 100

= 2.438 =2.44

B) w/w % of Mg in limestone as Mg2P2O7 = (Mass of Mg2P2O7 /Mass of limestone) x 100

= 0.0672/1.4639 X 100

= 4.590

C) w/w % of Ca in limestone as CaSO4 = (Mass of CaSO4/Mass of limestone) x 100

= 1.4058/1.4639 X 100

= 96

                                                           

3 0
3 years ago
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