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Troyanec [42]
4 years ago
8

This table shows the mass and volume of four different objects.

Chemistry
1 answer:
sergejj [24]4 years ago
4 0

Answer:

second one/ B

Explanation:

just took the quiz

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When 5ml of HCl was added
777dan777 [17]

Answer:

A. There was still 140 ml of volume available for the reaction

Explanation:

According to Avogadro's law, we have that equal volumes of all gases  contains equal number of molecules

According to the ideal gas law, we have;

The pressure exerted by a gas, P = n·R·T/V

Where;

n = The number of moles

T = The temperature of the gas

R = The universal gas constant

V = The volume of the gas

Therefore, given that the volumes and number of moles of the removed air and added HCl are the same, the pressure and therefore, the volume available for the reaction will remain the same

There will still be the same volume available for the reaction.

5 0
3 years ago
What is the role of the fungus in the food web shown?
vredina [299]

A. to remove dead organisms

Explanation:

The role of the fungus is to remove dead organisms from the ecosystem.

Decomposers plays very important role in the ecosystem.

  • They allow for the continuous cycling of materials there in.
  • Fungus and other micro-organisms are decomposers.
  • They take up the remains of other plant and animal matter and breaks them down.
  • this releases nutrients back to the soil and useful gases to the atmosphere.

learn more;

Decomposers brainly.com/question/12823338

#learnwithBrainly

7 0
3 years ago
What is the percent mass concentration of a solution that has 40g of NaOHin 500g of solution?
rodikova [14]

Answer:

540

Explanation:

i added them and then the result is out

5 0
3 years ago
How much pv work is done in kilojoules for the reaction of 0.68 mol of h2 with 0.34 mol of o2 at atmospheric pressure if the vol
dsp73
The delta H of -484 kJ is the heat given off when 2 moles of H2 react with 1 mole of O2 to make 2 moles of H2O. You don't have anywhere near that much reactants, only 1/4 as much

<span>actual delta H = 0.34  moles H2 x (-484 kJ / 2 moles H2) = 823 kJ </span>

<span>delta E = delta H - PdeltaV = 823 kJ - 0.41 kJ = 822 kJ</span>
3 0
4 years ago
A gas expands from a volume of 2.00L at 36.0oC to a volume of 2.50 L, what is the final temperature, if the pressure is constant
lakkis [162]
We shall consider V, the volume and T, the temperature.
According to Boyle's Laws:
\frac{V1}{T1} = \frac{V2}{T2}
In our case:
\frac{2.00}{36.0} = \frac{2.50}{T2} =\ \textgreater \  T2= \frac{2.50*36.00}{2.00} = 45
6 0
4 years ago
Read 2 more answers
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