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steposvetlana [31]
3 years ago
12

Which characteristics help enable plants to survive on earth ?

Chemistry
1 answer:
Liula [17]3 years ago
4 0
Plants use carbon dioxide, and put out oxygen, so it's like a cycle there. plants have roots to collect water from the soil around them. And they use the sun for energy.
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Which of the following is a combustion reaction
natima [27]
I didnt see the answers for answer your question
5 0
2 years ago
Read 2 more answers
1. A gas expands and does p-v work on the surroundings equal to
azamat

The change in energy of the system : -63 J

<h3>Further explanation</h3>

Given

279 J work

216 J heat

Required

The change in energy

Solution

Laws of thermodynamics 1

ΔU=Q+W

Rules :

  • receives heat, Q +  
  • releases heat, Q -  
  • work is done by a system, W -  
  • work is done on a system, W +  

a gas work on the surrounding : W =-279 J

a gas absorb heat from surrounding : Q = +216 J

Internal energy :

= -279+216

= -63 J

3 0
2 years ago
You are analyzing a compound in a laboratory. you find that it is made up of carbon, hydrogen, and oxygen in a ratio of two hydr
kotegsom [21]
<span>Carbohydrates because carbohydrate is a molecule that contains carbon, hydrogen and oxygen usually in a ratio of two hydrogen atoms for each carbon atom. Carbohydrates are also known as saccharides or carbs.They are basically sugar or starches.</span><span />
5 0
2 years ago
What amount in moles does 242 L of carbon dioxide occupy at 1.32 atm and 20 degrees C
Gelneren [198K]

Answer:

13.28 mol.

Explanation:

  • We can use the general law of ideal gas:<em> PV = nRT.</em>

where, P is the pressure of the gas in atm (P = 1.32 atm).

V is the volume of the gas in L (V = 242.0 L).

n is the no. of moles of the gas in mol (n = ??? mol).

R is the general gas constant (R = 0.0821 L.atm/mol.K).

T is the temperature of the gas in K (T = 20.0° + 273 = 293.0 K).

∴ n = PV/RT = (1.32 atm)(242.0 L)/(0.0821 L.atm/mol.K)(293.0 K) = 13.28 mol.

7 0
3 years ago
A student used a 10 ml volumetric pipet to measure and deliver an unknown liquid to a flask for density determination. the stude
andrew-mc [135]
The answer is
TOO LOW
4 0
2 years ago
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