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3 years ago

1. Which force below is an attractive force that pulls objects together?

2 answers:

8 0

The answer is gravity. Gravity is a attractive force that holds the solar system together. Everything and everyone that has mass has gravity, however, only massive objects such as the sun and Earth have noticeable gravity.

Vedmedyk [2.9K]3 years ago

4 0

Fraction that’s my eheissooakiss

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Calculate the number of atoms in 0.316 mol of phosphorus

MrRa [10]

Answer: 7.608 x 10∧23

Explanation:

Using Avogadro's Number;

1 mole of Phosphorus (P4) molecule contains 6.02 x 10∧23 molecules.

∴ 0.316 mole of Phosphorus (P4) will contain; 0.316 x 6.02 x 10∧23 =

1.902 x 10∧23 molecules.

1 molecule of Phosphorus (P4) is made up of 4 atoms.

∴ 1.902 x 10∧23 molecules Phosphorus (P4) will contain :

1.902 x 10∧23 x 4 = 7.608 x 10∧23 atoms

0.316 mole of phosphorus contains 7.608 x 10∧23 atoms.

6 0

3 years ago

Read 2 more answers

Whitney's tidal volume, which is the volume of air that she inhales and exhales, was 0.56 L . Her tidal volume was measured at a

ipn [44]

Given:

Volume of air inhaled V = 0.56 L

Temperature T = 37 C = 37 +273 = 310 K

Pressure P = 744 mmHg = 744/760 = 0.979 atm

% N2 in air = 78%

To determine:

The moles of N2 inhaled in one breath

Explanation:

Step 1: Calculate the moles of air inhales

Based on the ideal gas law:

PV = nRT

where P = pressure, T = temperature, V = volume, n = # moles

R = gas constant = 0.0821 L atm/mol-K

n = PV/RT = 0.979 * 0.56/0.0821*310 = 0.0215 moles of air

Step 2: Calculate the moles of N2

It is given that air contains 78% N2

Therefore:

moles of N2 = 0.0215 * 78/100 = 0.0168 moles

Ans: moles of N2 = 0.0168

6 0

4 years ago

At which of the following temperatures is the average kinetic energy of the molecules of a substance the least? 23.2 °C 35.2 °C

svp [43]

At 15.2°C. Kinetic energy of molecules highly depends on the temperature — the warmer it is, the faster the molecules will move, especially in fluids (gases and liquids). If we consider that the formula for average kinetic energy of molecules is:

Ek = 3/2*k*T where k is Boltzmanns constant and 3/2 is, well, 3/2, kinetic energy of molecules really only depends on the temperature.

7 0

4 years ago

Did they scientist believe in God

Nataliya [291]

Answer:

some of them not believe in God

6 0

3 years ago

How do S waves move through the earth?

pantera1 [17]

Answer:

I believe that its B

Explanation:

google lol

3 0

3 years ago