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sergey [27]
3 years ago
5

What is the net force on this object?

Chemistry
1 answer:
Elis [28]3 years ago
8 0

Hello!

what is the net force on this object?

A) 0 Newtons  

B) 200 Newtons  

C) 400 Newtons  

D) 600 Newtons

In this case, as the meanings of the vectors are opposite, one of the forces receives the negative signal and thus a piece of the other vector is drawn, as shown in the figure. And to know the module of the resultant force, if it subtracts the modules of the forces.

F_{Net} = F_{grav} - F_{air}

F_{Net} = 600 - 400

\boxed{\boxed{F_{Net} = 200N}}\end{array}}\qquad\checkmark

Answer:

B) 200 Newtons  

_________________________________

I Hope this helps, greetings ... Dexteright02! =)

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Calculate the number of molecules in 14.3 mol H2O.
Firdavs [7]

Answer:

I don't get it

Explanation:

please explain more about question

6 0
3 years ago
Calculate the molality, molarity, and mole fraction of FeCl3 in a 29.5 mass % aqueous solution (d = 1.283 g/mL).
faltersainse [42]

Answer:

molality FeCl3= 2.579 molal

molarity FeCl3 = 2.333 M

mol fraction FeCl3 = 0.0444

Explanation:

Step 1: Data given

Mass % = 29.5 %

Density = 1.283 g/mL

Molar mass FeCl3 = 162.2 g/mol

Step 2: Calculate mass solution

Suppose we have 1L = 1000 mL solution

Mass solution = 1.283 g/mL * 1000 mL = 1283 grams

Step 3: Calculate mass FeCl3

Mass FeCl3 = 0.295 * 1283 grams

Mass FeCl3 =  378.485 grams

Step 4: Calculate mass of water

Mass water = 1283 - 378.485 = 904.515 grams

Step 5: Calculate moles FeCl3

Moles FeCl3 = mass FeCl3 / molar mass FeCl3

Moles FeCl3 = 378.485 grams / 162.2 g/mol

Moles FeCl3 = 2.333 moles

Step 6: Calculate moles H2O

Moles H2O = 904.515 grams / 18.02 g/mol

Moles H2O = 50.195 moles

Step 7: Mol fraction FeCl3

Mol fraction FeCl3 = 2.333 / (50.195+2.333)

Mol fraction FeCl3 =   0.0444

Step 8: Calculate molality

Molality = moles FeCl3 / mass H2O

Molality = 2.333 moles / 0.904515 kg

Molality = 2.579 molal

Step 9: Calculate molarity

Molarity = moles / volume

Molarity FeCl3 = 2.333 moles / 1 L

Molarity FeCl3 = 2.333 M

8 0
3 years ago
8. Which of the following is a correct description of what happens when you place a liquid in freezer
yawa3891 [41]

Answer:

c. Energy from the liquid is exhausted into the atmosphere outside the freezer  

Explanation:

Energy from the liquid is exhausted into the atmosphere outside the freezer.

a. is wrong. If the energy remained inside the freezer, the warm liquid would cool down and the inside of the freezer would warm up.

b. is wrong. The freezer removes energy from the liquid.

5 0
4 years ago
At body temperature (37°C), the rate constant of an enzymecatalyzed decomposition is 2.3X10¹⁴ times that of the uncatalyzed reac
schepotkina [342]

The activation energy is lowered by 85351.23 J/mol.

<h3>What is the activation energy?</h3>

The activation energy is the energy that is used to start a reaction.

In K = (In A) - (Ea / RT)

In K = (-Ea / RT) + In A

Where k = the activity constant

Ea = activation energy

R = molar gas constant

T = absolute temperature in Kelvin

In K₁ = (-Ea₁ / RT) + In A (eqn 1)

At point 2 with the catalyst

In K₂ = (-Ea₂ / RT) + In A (eqn 2)

Note that the molar gas constant, the absolute temperature in Kelvin, and the activity constant are all the same for both points.

Subtract (eqn 1) from (eqn 2)

In K₂ - In K₁ = (-Ea₂ / RT) - (-Ea₁ / RT) + In A - In A

In (K₂ / K₁) = (1/RT) (Ea₁ - Ea₂)

We were told that K₂ / K₁ = 2.3 × 10¹⁴, then find the difference in Ea

R = 8.314 J/mol.K, T = 37°C = 310.15 K

In (2.3 × 10¹⁴) = (1/ (8.314×310.15) (Ea₁ - Ea₂)

33.1 = (1/2578.5871) (Ea₁ - Ea₂)

(Ea₁ - Ea₂) = 33.1 × 2578.5871 = 85351.23 J/mol

Thus, the enzyme that lower the Ea is 85351.23 J/mol.

To learn more about activation energy, refer to the below link:

brainly.com/question/15114573

#SPJ4

8 0
2 years ago
This homework assignemnt is confusing can someone please help.
Juliette [100K]

Answer: Heyya, the answer is  0.8539gH2. Pls mark brainliest

Explanation:

5 0
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