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e-lub [12.9K]
3 years ago
8

Which of the following is an example of pseudoscience?

Chemistry
2 answers:
solniwko [45]3 years ago
7 0

Answer:

Answer:

The answer to your question is: B. Astrology

Explanation:

A. Biology  is a science because it make used of the scientific method to prove its theories, so this option is wrong.

B. Astrology  this is the right option because it does not follow the scientific method to prove that stars and planets determine our future.

C. Chemistry  it make used of the scientific method, the results can be tested and replicative.

D. Physics  it's a science, its an extremely metholodogical science, this is not the right option.

E. Medicine it's a science, follows the scientific method, it establishes laws and theories.

hope helps you and if you want you can give me a brainly crown only if you want

GREYUIT [131]3 years ago
3 0

Answer:

superstition

Explanation:

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A physical change is a change (4 points) in the properties of matter that does not change the identity of the substance in the p
goblinko [34]
Yes a physical change can do that. A chemical change is like a burning candal
4 0
4 years ago
1. Consider the reaction: N2 (g) + O2 (g)  2NO (g) + Cl2 (g) A reaction mixture at 400 C has the following composition: [NO] =
Olegator [25]

Answer:

The reaction is not at the equilibrium, we have more products than reactants.

Explanation:

Step 1: Data given

Temperature = 400 °C

When Q=K, this means the system is at equilibrium. There will not be a shift to either the left or the right.

When Q<K,it means we have more reactants than products. The system will, as reaction, make more products, this will cause the equilibrium to move to the right.

When Q>K,it means we have more products than reactants. The system will, as reaction, make less products and more reactants, this will cause the equilibrium to move to the left.

[NO] = 0.01 M

[N2] = 0.001 M

[O2] = 0.001 M

Kc = 0.0156

Step 2: The balanced equation

N2 (g) + O2 (g) ⇆ 2NO (g) + Cl2 (g)

Step 3: Calculate Q

Q = [NO]²/[N2][O2]

Q = 0.01²/(0.01*0.001)

Q = 10

Q>>Kc

This means we have more products than reactants. The system will, as reaction, make less products and more reactants, this will cause the equilibrium to move to the left.

The reaction is not at the equilibrium, we have more products than reactants.

4 0
3 years ago
(Please explain the answer. Thank you!)
Dominik [7]

Sample cost = $15.796

<h3>Further explanation</h3>

Given

Mass = 2 g

Density = 0.718 g/ml

Cost =  $5.67 per mL

Required

Cost

Solution

The density : the ratio of mass and volume

Can be formulated :

Density (ρ) = m : V

The volume of the liquid :

V = m : ρ

V = 2 g : 0.718 g/ml

V = 2.786 ml

Sample cost :

= 2.786 ml x $5.67/ml

= $15.796

7 0
3 years ago
If the pressure of a gas is 1.50 atm, its volume is 2.50 L, and its temperature is 22, what is the volume if the pressure is inc
aksik [14]

Answer:

The answer to your question is V2 = 1.3 l

Explanation:

Data

Pressure 1 = P1 = 1.5 atm

Volume 1 = V1 = 2.50 l

Temperature 1 = T1 = 22°C

Pressure 2 = P2 = 3 atm

Volume 2 = V2 = ?

Temperature 2 = T2 = 35°C

Process

1.- Convert temperature to °K

T1 = 22 + 273 = 295°K

T2 = 35 + 273 = 308°K

2.- Use the combine gas law to solve this problem

                P1V1/T1 = P2V2/T2

-Solve for V2

                V2 = P1V1T2 / T1P2

3.- Substitution

                V2 = (1.5 x 2.5 x 308) / (295 x 3)

4.- Simplification

                V2 = 1155 / 885

5.- Result

                 V2 = 1.3 l

3 0
4 years ago
100 POINTS!!! WILL MARK BRAINIEST!!! What is the maximum number of grams of SO2 that can be fromed when 10.0 g of H2S reacts wit
beks73 [17]

Answer:

Mass = 12.82 g

Explanation:

Given data:

Mass of oxygen = 8.5 g

Mass of H₂S = 10.0 g

Mass of SO₂ = ?

Solution:

Chemical equation;

2H₂S + 3O₂ →  2SO₂ + 2H₂O

Number of moles of H₂S:

Number of moles = mass/ molar mass

Number of moles = 10.0 g / 34 g/mol

Number of moles =0.3 mol

Number of moles of oxygen:

Number of moles = mass/ molar mass

Number of moles = 8.5 g / 32 g/mol

Number of moles = 0.3 mol

Now we will compare the moles of SO2 with oxygen and hydrogen sulfide.

                         O₂             :         SO₂

                           3             :            2

                           0.3          :            2/3×0.3=0.2 mol

                         H₂S           :            SO₂

                           2              :            2

                         0.3             :           0.3

The number of moles of SO₂  produced by oxygen are less so it will limiting reactant.

Mass of SO₂:

Mass = number of moles × molar mass

Mass = 0.2 mol × 64.1 g/mol

Mass = 12.82 g

                   

8 0
4 years ago
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