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4 years ago

Explain the three ways that machines can make work easier

1 answer:

8 0

1. they work ways faster
2. you don't need 100 people making the same thing at once
3. its a better chance of not getting an injury

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The modern periodic table is organized according to atomic mass true or false

Margarita [4]

The modern periodic table is organized according to atomic mass true.

5 0

3 years ago

Exactly 1.0 mol N2O4 is placed in an empty 1.0-L container and is allowed to reach equilibriumdescribed by the equation N2O4(g)↔

Vilka [71]

Answer : The correct option is, (C) 1.1

Solution : Given,

Initial moles of $N_2O_4$ = 1.0 mole

Initial volume of solution = 1.0 L

First we have to calculate the concentration $N_2O_4$ .

$\text{Concentration of }N_2O_4=\frac{\text{Moles of }N_2O_4}{\text{Volume of solution}}$

$\text{Concentration of }N_2O_4=\frac{1.0moles}{1.0L}=1.0M$

The given equilibrium reaction is,

$N_2O_4(g)\rightleftharpoons 2NO_2(g)$

Initially c 0

At equilibrium $(c-c\alpha)$ $2c\alpha$

The expression of $K_c$ will be,

$K_c=\frac{[NO_2]^2}{[N_2O_4]}$

$K_c=\frac{(2c\alpha)^2}{(c-c\alpha)}$

where,

$\alpha$ = degree of dissociation = 40 % = 0.4

Now put all the given values in the above expression, we get:

$K_c=\frac{(2c\alpha)^2}{(c-c\alpha)}$

$K_c=\frac{(2\times 1\times 0.4)^2}{(1-1\times 0.4)}$

$K_c=1.066\aprrox 1.1$

Therefore, the value of equilibrium constant for this reaction is, 1.1

4 0

3 years ago

Do you think creativity can contribute to scientific inquiry and investigation? Provide an example and explain your answer.

frez [133]

Creativity is often defined as the ability to generate innovative ideas and manifest them from thought into reality. Any science experiment that is being done for the first time is creative because it's an innovative idea that's being transformed into reality by creating/doing the experiment.

8 0

4 years ago

How many grams can be prepared until equilibrium is attained? carbon disulfide is prepared by heating sulfur and charcoal. the c

e-lub [12.9K]

Kc = [CS2] / [S2][C] but, since C is solid, it doesn't fit here
Kc = [CS2] / [S2] 
S2(g) + C(s) ---> CS2(g) 
13.8mole S2 / 6.05L = 2.28M 

Kc = x / 2.28-x 
9.4 x (2.28-x) = x 
21.43 - 9.4x = x 
21.42 = 10.4x 
x = 2.05M = [CS2] 
2.05M x 6.05L = 12.46moles 
12.46moles x 76gmole = 946.96g CS2

5 0

3 years ago

How many grams of oxygen are required to react with 2.7 g of dihydrogen sulfide

KatRina [158]

Answer:

Mass = 3.84 g

Explanation:

Given data:

Mass of hydrogen sulfide = 2.7 g

Mass of oxygen required = ?

Solution:

Chemical equation:

2H₂S + 3O₂ → 2H₂O + 2SO₂

Number of moles of hydrogen sulfide:

Number of moles = mass/ molar mass

Number of moles = 2.7 g / 34 g/mol

Number of moles = 0.08 mol

Now we will compare the moles of hydrogen sulfide with oxygen.

H₂S : O₂

2 : 3

0.08 : 3/2 ×0.08 = 0.12 mol

Mass of oxygen;

Mass = number of moles × molar mass

Mass = 0.12 mol × 32 g/mol

Mass = 3.84 g

3 0

4 years ago