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3 years ago

What is the difference between a pulley and incline plane?

2 answers:

4 0

Pulley is a man made tool that helped people along tome to lift things they could not do by hand while a incline plane is like a car but flat and a machine that would let a person driving it to take thing froom one place to another.The difference is that a pulley lifts things whle a inclined plane moves supplies to another place.

erik [133]3 years ago

3 0

A incline plane is a flat inclined surface. You can stick a rope in the pulley and pull one side and the other side will lift something! They are both simple machines! The difference is a incline plane is a ramp and things go up or down and the pulley lifts something with force of your weight!!

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Select the correct statement (2.5 points) (A) Elements in the same row are similar in size. (B) Elements in the same column have

Mrrafil [7]

Answer:

Explanation:

We are talking about the periodic table in which elements where put under different rows and columns according to their atomic number (number of protons) in ascendant order.

In rows or periods we can find trends in some properties like atomic radius, electronegativity, etc...). So they are not similar in size. Option A is a false statement.

Also, they were organized in groups or columns according to their similar electronic configuration and chemical properties (like noble gases, halogens, etc...) This means option B is the correct statement.

8 0

3 years ago

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When 8.00x10^22 molecules of ammonia react with 7.00x10^22 molecules of oxygen according to the chemical equation shown below, h

Pavel [41]

NH₃:

N = 8*10²²
NA = 6.02*10²³

n = N/NA = 8*10²²/6.02*10²³ ≈ 1.33*10⁻¹=0.133mol

O₂:

N=7*10²²
NA = 6.02*10²³

n = N/NA = 7*10²²/6.02*10²³ = 1.16*10⁻¹=0.116mol

4NH₃ + 3O₂ ⇒ 2N₂ + 6H₂O
4mol : 3mol : 2mol
0.133mol : 0.116mol : 0,0665mol
limiting reactant

N₂:

n = 0.0665mol
M = 28g/mol

m = n*M = 0.0665mol*28g/mol = 1,862g

6 0

4 years ago

Explain the type of intermolecular forces exist in glycine molecule.

olga2289 [7]

Answer:

There are three types of intermolecular forces: London dispersion forces (LDF), dipole- dipole interactions, and hydrogen bonding. Molecules can have any mix of these three kinds of intermolecular forces, but all substances at least have LDF.

3 0

3 years ago

How many moles of agcl are contained in 244 ml of 0.135 m agcl solution. the density of the solution is 1.22 g/ml?

Zanzabum

Answer is: 3,94·10⁻² moles of silver chloride are contained in 244 ml of solution.

V(AgCl) = 244 ml = 0,244 l.

b(AgCl) = 0,135 mol/kg.

d(AgCl) = 1,22 g/ml.

m(AgCl) = V(AgCl) · d(AgCl).

m(AgCl) = 244 ml · 1,22 g/ml.

m(solution AgCl) = 297,68 g.

m(AgCl) = 0,135 mol ·143,3 g/mol = 19,34 g.

ω = 19,34 g ÷ 19,34 g + 1000 g = 0,0189.

m(AgCl) = 0,0189 · 297,68 g = 5,64 g.

n(AgCl) = 5,64 g ÷ 143,3 g/mol = 0,0394 mol.

4 0

4 years ago

Read 2 more answers

Acidic Basic Neutral

lana66690 [7]

The answer is acidic

8 0

3 years ago