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denis23 [38]
3 years ago
12

PLZ HELP AND I WILL GIVE BRAINLIEST

Chemistry
2 answers:
Afina-wow [57]3 years ago
8 0
The answer is 1. DOUBLING THE MASS MAKES THE FORCE ONE-half as larger .

Please put as brainliest
nalin [4]3 years ago
6 0
1. <span>Doubling the mass makes the force twice as larger</span>
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How many moles of hydrogen are produced from 57.5 grams of lithium?
melomori [17]

The moles of hydrogen which are produced from 57.5 grams of lithium is 8.21 grams.

<h3>What is stoichiometry?</h3>

Stoichiometry of the reaction gives idea about the relative amount of product produced by the reactant in terms of moles.

Given chemical reaction is:

2Li(s) + H₂O(l) → 2LiOH(aq) + H₂(g)

Moles of lithium will be calculated as:

n = W/M, where

  • W = given mass = 57.5g
  • M = molar mass = 7g/mol

n = 57.5 / 7 = 8.21 mol

From the stoichiometry of the reaction:

  • 2 moles of Li = produces 1 mole of H₂
  • 8.21 moles of Li = produces 8.21/2=4.105 moles of H₂

Mass of H₂ = (4.105mol)(2g/mol) = 8.21g

Hence required mass of hydrogen gas is 8.21g.

To know more about mass & moles, visit the below link:

brainly.com/question/20563088

#SPJ1

8 0
2 years ago
Choose all the answers that apply.
Minchanka [31]

Answer:

All of the above. The CV system transports blood and plasma the do all 4.

7 0
3 years ago
Placing a sample of iron (II) oxide into a graduated cylinder makes the water volume increase 12.0 mL. The weight of the sample
Alenkinab [10]

Answer:

Density, d=6.38\ g/cm^3

Explanation:

It is given that, placing a sample of iron (II) oxide into a graduated cylinder makes the water volume increase 12.0 mL.

It means that the volume of the sample is 12 mL

The weight of the sample is 76.6 g

We need to find the density of the sample.

12 mL = 12 cm³

The formula of density is given by :

d=\dfrac{m}{V}\\\\d=\dfrac{76.6\ g}{12\ cm^3}\\\\d=6.38\ g/cm^3

So, the density of the sample is 6.38\ g/cm^3.

3 0
3 years ago
Read 2 more answers
During its life cycle, an amphibian lives both on land and in water.
lisov135 [29]
Whats your question here?
8 0
4 years ago
Determine the empirical formula of kevlar, used in making bullet proof vests, is 70.6% c, 4.2% h, 11.8% n and 13.4% o.
Likurg_2 [28]

Assuming a basis of 100 g of Kevlar, therefore the masses are:

C = 70.6 g

H = 4.2 g

N = 11.8 g

O = 13.4 g

 

We know the molar masses are:

C = 12.01, H = 1.008, N = 14.01, O = 16.00

 

Calculating for the moles per element:

C = 70.6 / 12.01 = 5.88 mol

H = 4.2 / 1.008 = 4.17 mol

N = 11.8 / 14.01 = 0.84 mol

O = 13.4 / 16 = 0.84 mol

 

To get the empirical formula, the next step is to divide everything by the smallest moles = 0.84. So:

C = 7

H = 5

N = 1

O = 1

 

Hence the empirical formula is:

C7H5NO

3 0
4 years ago
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