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3 years ago

Which of the following is an example of pseudo science? (choose one, not two)

Chemistry

2 answers:

Alik [6]3 years ago

5 0

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.

Leokris [45]3 years ago

4 0

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.

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At a certain temperature, the K p Kp for the decomposition of H 2 S H2S is 0.746 0.746 . H 2 S ( g ) − ⇀ ↽ − H 2 ( g ) + S ( g )

Ivanshal [37]

Answer: The total pressure of container at equilibrium is 0.431 bar

Explanation:

We are given:

Pressure of hydrogen sulfide = 0.240 bar

The given chemical equation follows:

$H_2S(g)\rightleftharpoons H_2(g)+S(g)$

Initial: 0.240

At eqllm: 0.240-x x x

The expression of $K_p$ for above equation follows:

$K_p=\frac{p_{H_2}\times p_S}{p_{H_2S}}$

We are given:

$K_p=0.746$

Putting values in above expression, we get:

$0.746=\frac{x\times x}{0.240-x}\\\\x=0.191,-0.940$

Neglecting the negative value of 'x' because pressure cannot be negative.

So, the equilibrium pressure of hydrogen gas = x = 0.191 bar

The equilibrium pressure of sulfur gas = x = 0.191 bar

The equilibrium pressure of hydrogen sulfide gas = (0.240 - x) = (0.240 - 0.191) = 0.049 bar

Total pressure of the container at equilibrium = $p_{H_2}+p_{S}+p_{H_2S}$

Total pressure of the container at equilibrium = 0.191 + 0.191 + 0.049 = 0.431 bar

Hence, the total pressure of container at equilibrium is 0.431 bar

6 0

4 years ago

How would the lack of auxins affect plants' growth?

lidiya [134]

Answer:

I think it is B

Explanation:

3 0

3 years ago

A solution has a pH of 2.5. what is the H+

romanna [79]

Answer: The concentration of $H^+$ in the solution is $3.16\times 10^{-3}M$

Explanation:

pH is defined as the negative logarithm of hydrogen ion concentration present in the solution.

$pH=-\log [H^+]$ .....(1)

We are given:

pH of solution = 2.5

Putting values in equation 1, we get:

$2.5=-\log [H^+]$

$[H^+]=10^{-2.5}$

$[H^+]=3.16\times 10^{-3}M$

Hence, the concentration of $H^+$ in the solution is $3.16\times 10^{-3}M$

4 0

3 years ago

The equation shows the reaction between zinc metal and hydrochloric acid.

kodGreya [7K]

Answer: 10 grams of Hydrogen gas will be produced theoretically.

Explanation: The equation for the reaction between zinc metal and hydrochloric acid is:

$Zn(s)+2HCl(aq.)\rightarrow ZnCl_2(aq.)+H_2(g)$

As HCl is present in excess, therefore limiting reagent is Zinc metal as it limits the formation of product.

By stoichiometry,

1 mole of Zinc metal produces 1 mole of Hydrogen gas, therefore

$\text{5 moles of Zinc metal will produce}=\frac{1}{1}\times 5=5\text{ moles of Hydrogen gas}$

Amount of Hydrogen gas produced can be calculated by:

$\text{Mass of gas produced}=\text{Moles}\times \text{Molar mass}$

Molar mass of Hydrogen = 2 g/mol

Mass of hydrogen gas produced = (5 moles )× (2 g/mol)

Mass of hydrogen gas produced = 10 grams

3 0

4 years ago

Read 2 more answers

Pay if forward movie questions worksheet

stellarik [79]

Are you answering a worksheet or searching for one?

If you're searching for one here are some decent ones

1: https://www.eslprintables.com/cinema_and_television/movies/film_questionnaire_on_Pay_it__148601/

https://www.eslprintables.com/cinema_and_television/movies/Film_Pay_if_Forward_164829/

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4 years ago