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Andrews [41]
3 years ago
11

Ana drives at a speed of 175m/s. she recorded a distance of 2km. Find the time.

Chemistry
2 answers:
pantera1 [17]3 years ago
6 0

The time it took her to drive 2 km is 11.43 seconds, because sonverting kilometers to meters, it is 1000 meters to every kilometer, and she travels 2 kilometers, which is two-thousand meters. Then to find the time you need to divide the time by the speed, and with that you get 11.4285714286, or 11.43 seconds.

Leya [2.2K]3 years ago
3 0

Answer:

11.4  s

Explanation:

The relation among distance (d), speed (s), and time (t) is

d = st                  Divide both sides by s and transpose

t = d/s

d = 2 km = 2000 m

s = 175 m/s         Calculate t

t = 2000/175

t = 11.4 s

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Molarity(M) = \frac{moles of solute(mole)}{volume of solution (L)}\

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2) Molality : It is defined as mole of solute present in Kilogram of solvent . It can be expressed as :

Molality (m) = \frac{mole of solute (mol)}{Kilogram of solvent (Kg)}

Following are the steps to calculate molality :

Step 1: To find mole of Solute :

Mole of solute can be found out using mole formula . It is same as done for molarity .

Mole = 0.0665 mol

Step 2 : To find kilogram of solvent :

Mass of solvent can be calculated using density formula as :

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Plugging value in density formula :

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Multiplying both side by 350 mL

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