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Masteriza [31]
3 years ago
5

CAN SOMEONE HELP ME WITH THESE QUESTIONS PLEASE

Chemistry
2 answers:
Leto [7]3 years ago
6 0

Answer:what was it so I can help u do u even got the answers yet I’ll tell you I’m not going to guess

1.

Explanation:

Nostrana [21]3 years ago
5 0
What are they? .............
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A sample of hydrogen gas is placed in a 0.500 L container at 295K. The gas pressure is 1.442 bar. How many moles of H2 gas are i
steposvetlana [31]

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0.0294

Explanation:

5 0
3 years ago
Please help me, will mark brain whoever answers the fastest!
iogann1982 [59]

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3 0
3 years ago
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If this were a frictionless plane, what would be the ideal mechanical advantage?
slava [35]
<span>The answer is C)
mechanical advantage (MA = slope/height)
here length of slope = 9Hheight = H                                                 so mechanical advantage = ---- 9H/H= 9                                                  
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8 0
3 years ago
In an experiment, hydrochloric acid reacted with different volumes of sodium thiosulfate in water. A yellow precipitate was form
morpeh [17]

Answer:

The time taken for the cross to become invisible decreases.

Explanation:

We know that one of the factors affecting the rate of reaction is the concentration of reactants. From the collision theory, we know that the higher the concentration of reactants, the greater the possibility of effective collision between reactants leading ultimately to an increase in the rate of reaction. Increase in the rate of reaction implies that the reaction takes a shorter time to reach completion.

In the case of the reaction shown in the question, the point when the reaction is completed is observed by the time take for the cross mark to become invisible. If we look at the given data closely, we will notice that the volume of acid was held constant, the volume of thiosulphate was increased gradually while the volume of water was decreased accordingly. This implies that the concentration of the reactants was increased. Decreasing the volume of water increases reactant concentration.

As explained above, increase in reactant concentration increases the rate of reaction. Hence, the rate of reaction of the acid and thiosulphate increases as reactant concentration increases and the cross mark becomes invisible faster. This implies that in the last column for time taken for the cross to become invisible, the values of time decreases steadily as concentration of reactants increases.

5 0
3 years ago
An objects tendency to maintain its current state of motion is called
daser333 [38]
Inertia is the tendency of an object to remain at rest or remain in motion. Inertia is related to an object's mass.
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3 years ago
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