Which statement best describes how a catalyst increases the rate of a reaction?(1) The catalyst provides an alternate reaction pathway with a higher activation energy.
(2) The catalyst provides an alternate reaction pathway with a lower activation energy.
(3) The catalyst provides the same reaction pathway with a higher activation energy.
(4) The catalyst provides the same reaction pathway with a lower activation energy.

Answers

Answer 1

Answer: A catalyst works by providing an alternate reaction pathway with a lower activation energy thus allowing more particles of the reactant to overcome the energy barrier and form product per unit of time. (OPTION 2)

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If one body is positively charged and another body is negatively charged, free electrons tend to A. move from the negatively charged body to the positively charged body.
B. remain in the negatively charged body.
C. move from the positively charged body to the negatively charged body.
D. remain in the positively charged body.

Answers

I think the correct answer is A. If one body is positively charged and another body is negatively charged, free electrons tend to move from the negatively charged body to the positively charged body. This happens because they have different charges and therefore electrons are more attracted to the positive or its opposite charge.

Answer:

A. move from the negatively charged body to the positively charged body.

Explanation:

because this is the correct answer

Normal rain has a pH of about 5.5 whereas the most acidic rain measured in Los Angeles had a pH of 1.5. How much more concentrated in H+ is the acid rain than the normal rain?

Answers

pH is used to measure the acidity of a substance and it can be used to calculate the amount of H+ ions in a solution. pH is expressed as:

pH = -log [H+]
For a normal rain:
5.5 = -log [H+]
[H+] = 1 x 10^-5 M

For an acid rain:
1.5 = -log [H+]
[H+] = 0.03 M

the answer is 5.6 !!

Which balloon is heavier, inflated or deflated

Answers

The deflated balloon has only the weight of the balloon skin, but the inflated one has the weight of the balloon skin and the air inside. This makes it heavier because air has a weight, even if it is very small it has a weight. If you filled it with helium, you might then think it was lighter but still a balloon filled with helium is still heavier than the deflated one because helium is less dense than air (since it rises) but still has a weight.
Hope this helped and if you need more help then just message me instead ok m:)

The inflated balloon has more mass because the mass of the air inside of the balloon. The reason it floats is because the inflated balloon is less dense than the deflated one

11)A hybrid suv consumes fuel at a rate of 12.8 km/L. Using dimensional analysis, howmany miles can the car travel on 25.2 gal of gasoline? 3.78 L gal; 1.61 km 1 mi)

Answers

Dimensional analysis is a mathematical method that makes use of the fact that a number or expression with a unit can be multiplied by a factor without changing its value. It is done as follows:

12.8 km/L (25.2 gal) (3.78 L / 1 gal) (1 mi / 1. 61 km)

From the expression above, we cancel units and evaluate it. Then, this gives us,

757.31 miles

Mercury has a specific gravity of 13.6. how many milliliters of mercury have a mass of 0.35 kg

Answers

The formula for specific gravity is:

$Specific gravity = (\rho _(substance))/(\rho _(water))$

where $\rho _(substance)$ is the density of the substance and $\rho _(water)$ is the density of water.

The density of water, $\rho _(water)$ = $1 g/mL$

Substituting the values in above formula we get,

$13.6 = (\rho _(substance))/(1)$

$\rho _(substance) = 13.6 g/mL$

The formula of density is:

$density = (mass)/(volume)$

The density of mercury is $13.6 g/mL$

The mass of mercury is $0.35 kg = 0.35 kg * 1000 (g)/(kg) = 350 g$

Substituting the values in density formula:

$13.6 g/mL = (350 g)/(volume)$

$volume = (350 g)/(13.6 g/mL) = 25.73 mL$

The amount, in milliliters, of mercury that will have a mass of 0.35 kg would be 25.74 mL.

If the specific gravity of mercury is 13.6, the density can be obtained such that:

Density of mercury = specific gravity of mercury/density of water

The density of water is 1 g/mL. Thus:

Density of mercury = 13.6/1

= 13.6 g/mL

Also; density = mass/volume

volume = mass/density

= 350/13.6

= 25.74 mL

Thus, the number of milliliters of mercury that will have a mass of 0.35 kg would be 25.74.

More on density can be found here: brainly.com/question/14940265?referrer=searchResults

The electron affinity of an atom typically depends on theA. mass of the atom's nucleus.
B. number of electrons already present in the atom.
C. number of neutrons in the nucleus of the atom.
D. availability of an unfilled orbital in the atom.

Answers

Option D: availability of an unfilled orbital in the atom.

This is true because the atoms will try to complete the octete (8 electrons in the last p level)

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