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2 years ago

The mass of a mouse is around 22 grams (0.022 kg). What is the weight of a mouse at sea level on Earth?

Chemistry

2 answers:

Debora [2.8K]2 years ago

7 0

The correct answer would be 0.22 N.

Hope this helps.

balandron [24]2 years ago

7 0

Answer: last option, 0.22 N

Explanation:

Weight is the attractive force that the Earth exerts on the objects, and it is calculated as the product of the mass of the object and the gravitational acceleration: w = mg.

Gravitational acceleration depends of the height of the objects but it is almost a constant at the normal altitudes (near the surface) with which this kind of problems deal with. Of course, this is true at sea level on Earth.

A standard value used for g is 9.81 m/s^2. And for quick or approximate calculations it can be used 10 m/s^2.

So, to calculate what is the weight of a mouse at sea level on Earth, when you have that the mass of a mouse is around 22 grams (0.022kg), you folow these steps:

1) Data:

m = 0.022 kg

g = 10 m/s^2

w = ?

2) Formula: w = mg

3) Solution: w = 0.022 kg (10 m/s^2) = 0.22 N.

So, the answer is the last option: 0.22N.

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2 years ago

For each trial, compute the mol of titrant; (molarity x L) and keep the number of significant figures to 4.

MrMuchimi

Answer:

Trial Number of moles

1 0.001249mol

2 0.001232mol

3 0.001187 mol

Explanation:

To calculate the number of moles of tritant you need its molarity.

Since the molarity is not reported, I will use 0.1000M (four significant figures), which is used in other similar problems.

Molarity is the concentration of the solution in number of moles of solute per liter of solution.

In this case the solute is NaOH.

The formula is:

$Molarity=\dfrac{\text{Number of moles of solute}}{\text{Volume of solution in liters}}$

Solve for the number of moles:

$\text{Number of moles}=Molarity\times Volume\text{ }in\text{ }liters$

Then, using the molarity of 0.1000M and the volumes for each trial you can calculate the number of moles of tritant.

Trial mL liters Number of moles

1 12.49 0.01249 0.01249liters × 0.1000M = 0.001249mol

2 12.32 0.01232 0.01232liters × 0.1000M = 0.001232mol

3 11.87 0.01187 0.01187liters × 0.1000M = 0.001187 mol

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2 years ago

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gas has an initial volume of 2.4 L at a pressure of 1.5 atm and a temperature of 273 K. The pressure of the gas increases to 4.5

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3 years ago

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user100 [1]

Answer:

See explanation

Explanation:

For Fe;

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For Ni

Ni2+(aq) + 2H+(aq) + S2-(aq) ----> NiS(s) + H2(g)

For Cr

2Cr3+(aq) + 6H+(aq) + 3S2-(aq) ----->Cr2S3(s) + 3H2(g)

We must remember that in writing these equations, the number of electrons lost or gained must be balanced. The number of electrons lost by the metal must equal the number of electrons gained by hydrogen. This rule was followed in writing all the equations above.

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2 years ago

The m equivalent of 758,422,344 cm equals (to 3 sf)

denis23 [38]

1) convert cm to m

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The answer will be $7.58$ × $10^{6}$ meters after rounding

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2 years ago