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viktelen [127]
3 years ago
10

What is the formula to use for this question, "how far does light travel in 2.5s"?

Chemistry
1 answer:
Nutka1998 [239]3 years ago
6 0
The definition of the speed of light is exactly 299,792,458 meters per second, so to find how far it travels in a time period, multiply the speed of light times the time. Aka c=299,792,458m/s where c is speed of light, m is meters, and s is seconds. So for example to find how far light travels in 5 seconds, multiply by 5.
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A chemist prepares a solution of barium acetate by measuring out of barium acetate into a volumetric flask and filling the flask
leonid [27]

The given question is incomplete. The complete question is :

A chemist prepares a solution of barium acetate by measuring out 32 g of barium acetate into a 350 ml volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's barium acetate solution. Round your answer to significant digits.

Answer:  The concentration of barium acetate solution is 0.375 mol/L

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n = moles of solute

V_s = volume of solution in ml

moles of Ba(CH_3COO)_2 = \frac{\text {given mass}}{\text {Molar mass}}=\frac{32g}{255g/mol}=0.125mol

Now put all the given values in the formula of molality, we get

Molarity=\frac{0.125\times 1000}{350ml}

Molarity=0.357M

Therefore, the concentration of solution is 0.375 mol/L

8 0
3 years ago
2Al + 6HCl → 2AlCl3 + 3H2<br> If 85.0 grams of HCl react, how many moles of H2 are produced?
Murrr4er [49]

Answer:

1.17 mol

Explanation:

Step 1: Write the balanced equation

2 Al + 6 HCl → 2 AlCl₃ + 3 H₂

Step 2: Calculate the moles corresponding to 85.0 g of HCl

The molar mass of HCl is 36.46 g/mol.

85.0 g × 1 mol/36.46 g = 2.33 mol

Step 3: Calculate the number of moles of H₂ produced from 2.33 moles of HCl

The molar ratio of HCl to H₂ is 6:3.

2.33 mol HCl × 3 mol H₂/6 mol H₂ = 1.17 mol H₂

8 0
3 years ago
Why must living things rely on thousands of catalysts for chemical reactions necessary for life?
just olya [345]
<span>It affects only one chemical reaction</span>
8 0
3 years ago
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Que es la nanotecnologia ?<br> porfis lo nesecito urgente para antes de las 10
kenny6666 [7]

Answer:

Se aclama la nanotecnología por tener el potencial de aumentar la eficiencia del consumo de energía, ayudar a limpiar el medio ambiente y resolver los principales problemas de salud. Se dice que puede aumentar masivamente la producción de fabricación a costos significativamente reducidos.

espero que esto ayude

5 0
3 years ago
A liquid may reach its boiling point if
EleoNora [17]
A. heat is added to it
7 0
3 years ago
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