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Archy [21]
3 years ago
11

How much work is required to lift a 0.500 kg block 18.5 m?

Chemistry
1 answer:
kipiarov [429]3 years ago
3 0

Answer:

Work = 90.65 j

Explanation:

Given data:

Mass = 0.500 Kg

Distance = 18.5 m

Work done = ?

Solution:

Work = force . distance

Force = mg

Work = mg.distance

Work = mgh

Work = 0.500 Kg × 9.8 m/s²× 18.5 m

Work = 90.65 Kg .m²/s²

Kg .m²/s² = j

Work = 90.65 j

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What is a chemical entity that forms a complex ion around a central atom?
stiks02 [169]
A coordination complex consists of a central atom or Jon, which usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligand or complexing agents
7 0
3 years ago
A student titrates a 20.00 mL sample of an aqueous borax solution with 1.03 M H2SO4. If 2.07 mL of acid are needed to reach the
RSB [31]

Answer:

The concentration of the borax solution is 0.1066 M

Explanation:

Step 1: Dtaa given

Volume of a sample of aqueous borax solution = 20.00 mL = 0.020 L

Molarity of H2SO4  = 1.03 M

Volume of the H2SO4 = 2.07 mL = 0.00207 L

Step 2: The balanced equation

Na2B4O7*10H2O(borax) + H2SO4 ⇆ Na2SO4 + 4 H3BO3 + 5 H2O

Step 3: Calculate molarity of borax solution

b*Ca*Va = a * Cb*Vb

⇒with B = the coefficient of H2SO4 = 1

⇒with Ca = the concentration of borax = TO BE DETERMINED

⇒with Va = the volume of borax = 0.020 L

⇒with a = the coefficient of borax = 1

⇒with Cb = the concentration of H2SO4 = 1.03 M

⇒with Vb = the volume of H2SO4 = 0.00207 L

Ca*0.020 L = 1.03 M * 0.00207 L

Ca = (1.03 * 0.00207) / 0.020

Ca = 0.1066 M

The concentration of the borax solution is 0.1066 M

6 0
3 years ago
Which is not needed for a hurricane to form?
aliya0001 [1]

Answer:

strong cold front

Explanation:

5 0
3 years ago
Read 2 more answers
1. According to Le Châtelier's principle, an increase in temperature will shift the equilibrium position toward the products in
sdas [7]

Answer:

1. True

2. Shift it toward the side with lower total mole concentration

3. It will shift toward the product side as there are a fewer number of moles of gas on the product side.

Explanation:

1.

An endothermic reaction is reaction that will absorb energy from the surrounding arena. Increasing temperature will increase the heat of the system. Since the average heat of the surrounding is higher, it will be easier to do an endothermic reaction than exothermic, so this will shift the equilibrium position toward endothermic reaction.

2.

When pressure increase, the molecule will harder to expand. This mean reaction that produces more molecules will be harder to happen since it will take more room and increase the pressure further. This will make the equilibrium shift toward the side with lower total mole concentration since it will help to make more room, thus making the pressure lower.

3.

Remember that only the gas form will contribute to the pressure of the system. In this reaction, there are 3 kinds of gas: nitrogen, hydrogen, and ammonia. Since all form in this reaction gas, you can calculate them all.

On the left side, we have 1 nitrogen and 3 hydrogen so the total is 4.

On the right side, we have 2 ammonia so the total is 2.

When pressure decrease, the equilibrium will shift toward the side with lower total mole concentration, which is the ammonia side. So, the reaction will shift to the product side.

3 0
3 years ago
If the first energy level can hold 2 electrons, the second holds 8, and the third can hold 8, what if the atomic number is bigge
sergejj [24]
You're wrong because the third energy level can contain 18 <span>electrons. And the 4th have up to 32 elections.

The pattern go by 2-8-18-32</span>
4 0
3 years ago
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