All categories

2 years ago

Help, please!! If an object with a mass of 4.2 kg accelerates at 2.6 m/s2, what was the force exerted?

Chemistry

1 answer:

Paha777 [63]2 years ago

6 0

10.92N

Force = mass x acceleration
4.2kg x 1.6m/s^2 = 10.92N

You might be interested in

Describe two situations that reduce the dissolved oxygen content of water?

Olin [163]

Hi sweetie, hope this helps!

The more salt that is dissolved in the water, the less oxygen will be dissolved in it.

The higher the temperature of the water, the less oxygen will be dissolved it in.

Goodluck!,
Izzy

4 0

3 years ago

0.055 grams of PbSO4 is dissolved in 200.00 grams of H2O.

Greeley [361]

Answer:

Solution's mass = 200.055 g

[PbSO₄] = 275 ppm

Explanation:

Solute mass = 0.055 g of lead(II) sulfate

Solvent mass = 200 g of water

Solution mass = Solvent mass + Solution mass

0.055 g + 200 g = 200.055 g

ppm = μg of solute / g of solution

We convert the mass of solute from g to μg

0.055 g . 1×10⁶ μg/ 1g = 5.5×10⁴μg

5.5×10⁴μg / 200.055 g = 275 ppm

ppm can also be determined as mg of solute / kg of solution

It is important that the relation is 1×10⁻⁶

Let's verify: 0.055 g = 55 mg

200.055 g = 0.200055 kg

55 mg / 0.200055 kg = 275 ppm

6 0

2 years ago

How many moles of gold are there in 14.2×1023 atoms of gold?

timofeeve [1]

Answer : The correct answer is 2.36 mol of gold

1 mole of any element have 6.022 x 10²³ number of atoms ( Avogadro's number).

So the formula relating mole and number of atoms is given as :

$Mole = \frac{given number of atom }{ 6.022 * 10^2^3 atom} * 1 mol$

Plugging value in formula :

$Mole = \frac{14.2 *10^2^3 }{6.022 x10^2^3} * 1 mol$

Mole of gold = 2.36 mol

4 0

3 years ago

Read 2 more answers

Answer quickly plzzzz 100 points

Paladinen [302]

Answer:

hydrogen and oxygen

Explanation:

6 0

2 years ago

Read 2 more answers

6. A sample of a gas has a mass of 0.527 g. Its volume is 0.35 L at a temperature of 88 degree Celsius and a pressure of 945 mm

Stels [109]

<u>Answer:</u> The molar mass of the gas is 35.87 g/mol.

<u>Explanation:</u>

To calculate the mass of gas, we use the equation given by ideal gas:

PV = nRT

or,

$PV=\frac{m}{M}RT$

where,

P = Pressure of gas = 945 mmHg

V = Volume of the gas = 0.35 L

m = Mass of gas = 0.527 g

M = Molar mass of gas = ? g/mo

R = Gas constant = $62.3637\text{ L.mmHg }mol^{-1}K^{-1}$

T = Temperature of gas = $88^oC=[88+273]=361K$

Putting values in above equation, we get:

$945mmHg\times 0.35L=\frac{0.527g}{M}\times 62.3637\text{ L.mmHg }mol^{-1}K^{-1}\times 361K\\\\M=35.87g/mol$

Hence, the molar mass of the gas is 35.87 g/mol.

5 0

3 years ago