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2 years ago

H2O(s) is classified as

Chemistry

2 answers:

Inga [223]2 years ago

8 0

H2O is classified as water.

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-vf

Salsk061 [2.6K]2 years ago

7 0

H2O Classified as a Molecular Compound composed of 2 or more Non-Metals, or water

(H = Hydrogen),(O = Oxygen) = Non - Metals

Liquid or Gas Form(water vapor/steam); also, has 2 Atoms of hydrogen. That's why it has(2 after the H, and one oxygen atom.).

Hope that helps!!!

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Tris has a molecular weight of 121 g/mol. How many grams of Tris would you need to make 100 mL of a 100 mM solution of Tris

Zepler [3.9K]

Answer:

1.21 g of Tris

Explanation:

Our solution if made of a solute named Tris

Molecular weight of Tris is 121 g/mol

[Tris] = 100 mM

This is the concentration of solution:

(100 mmoles of Tris in 1 mL of solution) . 1000

Notice that mM = M . 1000 We convert from mM to M

100 mM . 1 M / 1000 mM = 0.1 M

M = molarity (moles of solute in 1 L of solution, or mmoles of solute in 1 mL of solution). Let's determine the mmoles of Tris

0.1 M = mmoles of Tris / 100 mL

mmoles of Tris = 100 mL . 0.1 M → 10 mmoles

We convert mmoles to moles → 10 mmol . 1mol / 1000mmoles = 0.010 mol

And now we determine the mass of solute, by molecular weight

0.010 mol . 121 g /mol = 1.21 g

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2 years ago

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bazaltina [42]

Answer:

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Explanation:

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2 years ago

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How many calories of heat are necessary to raise the temperature of 319.5 g of water from 35.7 °C

rjkz [21]

20600Cal

Explanation:

Given parameters:

Mass of water = 319.5g

Initial temperature = 35.7°C

Final temperature = 100°C

Unknown:

Calories needed to heat the water = ?

Solution:

The calories is the amount of heat added to the water. This can be determined using;

H = m c Ф

c = specific heat capacity of water = 4.186J/g°C

H is the amount of heat

Ф is the change in temperature

H = m c (Ф₂ - Ф₁)

H = 319.5 x 4.186 x (100 - 35.7) = 85996.56J

Now;

1kilocalorie = 4184J

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learn more:

Specific heat brainly.com/question/3032746

#learnwithBrainly

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2 years ago