All categories

3 years ago

What is the potential energy of an 18 kg object with a height of 15 m?

Chemistry

2 answers:

Mila [183]3 years ago

8 0

302 (mgh) is the answer

kicyunya [14]3 years ago

5 0

Explanation:

Potential Energy :

PE = m x g x h

PE= 18 x 10 x 15

PE= 2700Joule...

You might be interested in

How are meiosis related to sexual reproduction

Lady_Fox [76]

Answer:

they are related to sexual reproduction by being able to make both egg and sperm cells

4 0

3 years ago

Read 2 more answers

1.) A balloon contains 0.126 mol of gas and has a volume of 2.74 L .

Ann [662]

Answer:

Problem 1: 5.44L

Problem 2: 479mL

Explanation:

<h2>Problem 1. </h2>

a) Data:

n₁ = 0.126 mol
V₁ = 2.74 L
n₂ = 0.126mol + 0.124mol
V₂ = ?
Conditions: constant temperature and pressure

b) Physical principles:

The volume occupied by a gas, when the temperature and pressure remain unchanged, is proportional to the number of moles of gas.

$\dfrac{n_1}{V_1}=\dfrac{n_2}{V_2}$

c) Solution:

Solve for V₂ , substitute and compute:

$V_2=n_2\times\dfrac{V_1}{n_1}\\ \\\\ V_2=(0.126mol+0.124 mol)\times \dfrac{2.74L}{0.126mol}\\ \\ \\ V_2=5.44L$

<h2>Problem 2.</h2>

a) Data:

n₁ = 0.547mol
V₁ = 295 mL
V₂ = ?
n₂ = 0.547mol + 0.342 mol
Conditions: constant temperature and pressure

b) Physical principles:

The same as above: the volume occupied by a gas, when the temperature and pressure remain unchanged, is proportional to the number of moles of gas.

$\dfrac{n_1}{V_1}=\dfrac{n_2}{V_2}$

c) Solution:

Solve for V₂ , substitute and compute:

$V_2=n_2\times\dfrac{V_1}{n_1}\\ \\\\ V_2=(0.547mol+0.342 mol)\times \dfrac{295mL}{0.547mol}\\ \\ \\ V_2=479mL$

4 0

3 years ago

1; The change of matter from a solid state to a gas state

WINSTONCH [101]

1 The change of matter from a solid state to a gas state is called sublimation.

2. When a solute is completely dissolved in a solvent, a solution is formed. (A)

3. Base are used in Used in ammonia, Alka-Seltzer, and dish soap

4. TRUE . Simple devices lower the required input force.

5. FALSE. It's the opposite.

6 0

3 years ago

Match the molecular shapes to the correct Lewis structures

natali 33 [55]

Answer:

1) trigonal planar

2)tetrahedral

3)trigonal pyramid

4) linear

8 0

2 years ago

Read 2 more answers

All atoms of an element are ________?

mote1985 [20]

Possibly different But here I hope this helps Recall that neutrons, along with protons, make up the nucleus. Since neutrons have no electrical charge, they do not affect the chemical behavior. ... Atoms of the same element with different numbers of neutrons are called isotopes.

4 0

3 years ago

Read 2 more answers