A solution of H2SO4 with a molal concentration of 5.25m has a density of 1.266 g/ml. what is the molar concentration of this solution?

Answers

Answer 1

Answer:

There are a number of ways to express concentration of a solution. This includes molarity and molality. Molarity is expressed as the number of moles of solute per volume of the solution while molality is expressed as the number of moles solute per mass of solution.

Molarity = 5.25 mol / kg solution (1.266 kg / L) = 6.65 M

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Which describes a way to speed up the collisions between hydrogen and oxygen molecules to produce more water?
The metalloid that has three valence electrons is?
Which compound has the lowest vapor pressure at 50°C?(1) ethanoic acid (3) propanone(2) ethanol (4) water
Mr. Smith wanted to see if the color of light shined on a plant had an effect on the number of leaves it had. He gathered 2 groups of the same species of plants, gave them the same amount of water, and did the test for the same amount of time. On one group of plants he used white light. For the second group he changed the light color to red.

Which is classified as a renewable resource? A. coal B. wind C. oil D. uranium

Answers

The answer is B) Wind because wind will always be available, while coal, oil and uranium are objects we are digging up. This makes wind a renewable resource, therefore it is better for the environment because we can theoretically never run out of it. This is the reason we are starting to use wind to create energy; we can use it again.

The answer is obviously B. It is the only one that can continually be renewed without fail.

The average speed of a nitrogen molecule in air at 25 °C is 515 m/s. Convert this speed to miles per hour.

Answers

Answer:

1151.08miles/h

Explanation:

The given speed is 515 m/s

To convert meters per second to miles per hour:

Convert meters to miles: 1 m = 0.000621371 miles

Convert seconds to hours: 1 hr = 3600 s

Plug into the formula: miles/hr = (m/s) * (0.000621371 miles/m) * (3600 s/hr)

Plugging in the numbers: miles/hr = (515 m/s) * (0.000621371 miles/m) * (3600 s/hr) miles/hr = 1151.08miles/h

Therefore, the average speed of a nitrogen molecule in air at 25 °C converted to miles per hour is 1151.08miles/h.

Final answer:

To convert the average speed of a nitrogen molecule in air from meters per second to miles per hour, first convert the speed from meters per second to kilometers per hour, and then convert from kilometers per hour to miles per hour.

Explanation:

To convert the average speed of a nitrogen molecule in air from meters per second to miles per hour, we can use the conversion factor 1 mile = 1609.34 meters and 1 hour = 3600 seconds.

First, let's convert the speed from meters per second to kilometers per hour. We divide the speed in meters per second by 1000 to get the speed in kilometers per second and then multiply by 3600 to get the speed in kilometers per hour. This gives us a speed of approximately 1850 km/h.

Next, we convert the speed from kilometers per hour to miles per hour by dividing the speed in kilometers per hour by 1.60934. This gives us a speed of approximately 1150 mph.

Learn more about speed conversion here:

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Can anyone think of an analogy for a synthesis reaction?

Answers

In a synthesis reaction (also known as a composition reaction), two substances combine to form a larger substance. A good analogy of these reactions are dancers. ... In the simplest type of synthesis reaction, two elements combine to form a compound.

The compound before the arrow are called blank and the compound after the arrow are called blank

Answers

First one is reactants and then second one is products

The Kw of water varies with temperature. Calculate the pH of water at 46⁰C with a Kw = 1.219 x 10-14. Show all calculations leading to an answer.

Answers

Kw is equal to the concentration of the H+ and the OH-. In pure water, the concetration of H+ and the OH- is equal. In computing for the pH of water, we tke the negative log of the concentration of H+. To solve the concentration of H+ we take the square root of the Kw (Since Kw=[H+]*[H+] since [H+]=[OH-])
H+ is equal to 1.104*10^-7
negative log of the H+ conc. or the pH is 6.96 (pH = -log(1.104*10^-7))

The answer is valid and is close to the neutral pH which is 7.

Based on the electron configuration,how many valence electrons are in
technetium, Tc?
1s²2s²2p63s²3p64s23d¹04p65s24d5
A2
C. 4
B. 5
D. 9

Answers

Answer:

Explanation:

The outermost shell is 5s and it has two electrons.

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