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2 years ago

When a book sits on a shelf, what force (If Any) does the shelf exert on the book?

Chemistry

2 answers:

Sliva [168]2 years ago

4 0

Answer:

thank totes correct thanks get nay nayed

Explanation:

idk i just listened to the guy above me

Bad White [126]2 years ago

3 0

I'm pretty sure its the weight of the book

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Results published in journals provide the most reliable information about new discoveries because _____.

sesenic [268]

The correct answer is D, they are reviewed by experts.

<em>(Please mark this answer as Brainliest and leave a Thanks if I helped you!)</em>

3 0

3 years ago

Read 2 more answers

35.10 g of aluminum hydroxide is allowed to react with 53.94 g of sulfuric acid as follows:2Al(OH)3(s) + 3H2SO4(aq) -------->

ikadub [295]

Answer:

62.586 gram

Explanation:

moles of Al(OH)3 = mass / molar mass = 35.1 / (27+17x3) = 0.45 mol

moles of H2SO4 = mass / molar mass = 53.94 / (2+32+16x4) = 0.55 mol

H2SO4 is the limiting reagent (reacts completely)

⇒ moles of Al2(SO4)3 is worked out by moles of H2SO4

moles of Al2(SO4)3 = moles of H2SO4 / 3 = 0.183 mol

mass of Al2(SO4)3 = mole x molar mass = 0.183 x (27x2 + 96x3) = 62.586 gram

8 0

2 years ago

Cos(A)+cos(2A)+cos(3A)=0 is not an identity

guajiro [1.7K]

Answer:

this is the required answer look it once

3 0

2 years ago

If you combine 24.2 g of a solute that has a molar mass of 24.2 g/mol with 100.0 g of a solvent, what is the molality of the res

antoniya [11.8K]

Answer: 10 moles/kg.

Explanation:

Given, Mass of solute = 24.2 g

Molar mass of solute = 24.2 g/mol

$\text{Moles of solute =}\dfrac{\text{Mass of solute}}{\text{Molar mass of solute}}\\\\=\dfrac{24.2}{24.2}=1$

Mass of solvent = 100.0g = 0.1 kg [1 g=0.001 kg]

$\text{Molality}=\dfrac{\text{Moles of solute}}{\text{kilograms of Solvent}}\\\\=\dfrac{1}{0.1}\\\\=10\ moles/kg$

Hence, the molality of the resulting solution is 10 moles/kg.

5 0

2 years ago

What is the mass of 0.25 moles of water? Question 7 options: C 0.258 C4.58 C188 128

ch4aika [34]

Answer:

4.5 g

Explanation:

Given,

Moles of water = 0.25 moles

Molar mass of water ( $H_2O$ ) = $2\times 1+1\times 16$ = 18 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$0.25\ moles= \frac{x}{18\ g/mol}$

<u>Mass of water in 0.25 moles = 4.5 g</u>

6 0

3 years ago