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3 years ago

10

Place the steps of the scientific method in order

2 answers:

Elis [28]3 years ago

7 0

1.) Make an observation.
2.) Ask a question.
3.) Form a hypothesis.
4.) Make a prediction based on the hypothesis.
5.) Test the prediction. (Design experiment)
6.) Iterate: use the results to draw conclusions.

Rzqust [24]3 years ago

7 0

1. ask a question
2. develop a hypothesis
3. design an experiment
4. make observations
5. analyze data
6. draw conclusions

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Which of the following is the BEST description of a budget? *<br> 10

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The equilibrium constant, Kc, for the following reaction is 5.10×10-6 at 548 K. NH4Cl(s) NH3(g) + HCl(g) Calculate the equilibri

levacccp [35]

<u>Answer:</u> The equilibrium concentration of HCl is $2.26\times 10^{-3}M$

<u>Explanation:</u>

We are given:

Moles of $NH_4Cl(s)$ = 0.564 moles

Volume of vessel = 1.00 L

Molarity is calculated by using the equation:

$\text{Molarity}=\frac{\text{Number of moles}}{\text{Volume of solution (in L)}}$

Molarity of $NH_4Cl=\frac{0.564}{1}=0.564M$

The given chemical equation follows:

$NH_4Cl(s)\rightleftharpoons NH_3(g)+HCl(g)$

<u>Initial:</u> 0.564

<u>At eqllm:</u> 0.564-x x x

The expression of $K_c$ for above equation follows:

$K_c=[NH_3][HCl]$

The concentration of pure solid and pure liquid is taken as 1.

We are given:

$K_c=5.10\times 10^{-6}$

Putting values in above equation, we get:

$5.10\times 10^{-6}=x\times x\\\\x=2.26\times 10^{-3}M,-2.26\times 10^{-3}M$

Negative sign is neglected because concentration cannot be negative.

So, $[HCl]=2.26\times 10^{-3}M$

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3 years ago

The missing components in the table to the right are indicated with orange letters. Complete table by filling in the correspondi

V125BC [204]

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A = In

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C = 73

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F = 54

G = 66

H = 108

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Explanation :

Atomic number is defined as the number of protons or number of electrons.

Atomic number = number of protons = number of electrons

Mass number is defined as the sum of number of protons and number of neutrons.

Number of neutrons = Mass number - Number of protons

Number of electrons = Number of protons - charge

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symbol protons electrons neutrons mass

Co 27 27 31 58

In 49 49 66 115

Ta 73 73 108 181

Ba²⁺ 56 54 81 137

S²⁻ 16 18 16 32

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4 years ago