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Arisa [49]
3 years ago
5

Help me with this please!

Chemistry
1 answer:
Annette [7]3 years ago
8 0

The correct answer is 9.7 grams because mg are 1,000 difference to grams.

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What is the momentum of a 1,700 kg car travelling in a straight line at 13 m/s?
Anna71 [15]

Answer:

Explanation:

We know that momentum is the product of mass and velocity so here

mass (m) = 1700 kg

velocity (v) = 13 m/s

So now

momentum = m * v

                   = 1700 * 13

                   = 22100 kg m/s

hope it helps :)

4 0
3 years ago
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Mumz [18]

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4 0
2 years ago
Read 2 more answers
What is the mass of 1 mole of lithium?
Korolek [52]

<u>Answer:</u> The mass of 1 mole of lithium is 6.941 grams.

<u>Explanation:</u>

To calculate the mass of a compound or element, we use the formula used to calculate the number of moles:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Where,

Number of moles of lithium = 1 mole

Given mass of lithium = ? g

Molar mass of lithium = 6.941 g/mol

Putting value in above equation, we get:

1mole=\frac{\text{Given mass}}{6.941g/mol}\\\\\text{Mass of lithium}=6.941g

Hence, the mass of 1 mole of lithium is 6.941 grams.

5 0
2 years ago
Read 2 more answers
One unusual characteristic of water is its high specific heat, which means that water __. Multiple select question. warms or coo
Rus_ich [418]

The high specific heat of water means that water absorbs a great amount of heat before its temperature changes.

<h3>Specific heat capacity of water</h3>

Specific heat capacity of a substance is defined as the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C).

There are substances that has low Specific heat capacity for example metals like iron while some other substances have high specific heat capacity like water.

The high specific heat capacity seen in water means that it takes more energy to increase the temperature of water compared to other substances.

Therefore, the high specific heat of water means that water absorbs a great amount of heat before its temperature changes.

Learn more about specific heat here:

brainly.com/question/13439286

6 0
2 years ago
What is the melting point of a solution in which 2.5 grams of sodium chloride is added to 230 mL of water?
Lemur [1.5K]
To get the melting point of a solution so, we will use this formula:

ΔT = - mKf

when:

m is molality of the solution

Kf is cryoscopic constant  of water  = 1.86 C/m

and ΔT is the change in melting point (T2 - 0 °C)

so, now we need to calculate the molality to substitute:

when the molality = moles NaCl / Kg of water

 and when moles NaCl  = mass / molar mass

                                       = 2.5 g / 58 g/mol

                                       = 0.043 mol
∴ Kg water = volume *density /1000

                   = 230 mL * 1 g/mL / 1000

                  = 0.23 Kg
∴ molality = 0.043 / 0.23 =0.187 M

by substitution:

T2-0°C = - 0.187 * 1.86

∴T2 = - 0.348 °C

5 0
2 years ago
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