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11Alexandr11 [23.1K]
3 years ago
11

what is the final step in the scientific method? A) analyze the data and draw conclusions B) conduct the experiment C) collect t

he data D) form a hypothesis
Chemistry
2 answers:
stealth61 [152]3 years ago
8 0

Answer: A) Analyze the data and draw conclusions

The steps of the scientific method are:

1. Ask a question

2. Write a testable hypothesis

3. Test the hypothesis using a controlled experiment

4. Collect data and observations

5. Analyze the data

6. Draw conclusions

I hope that helps! :)

kipiarov [429]3 years ago
8 0

Answer:

A) Analyze the data and draw conclusions .

Need to figure out what you learned from the experiment and to see if your hypothesis is correct or wrong.

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In the following chemical reaction between H_2 and Cl_2 to produce HCl, what is the sum of the mass of HCl produced plus the mas
Nonamiya [84]

Answer:

Left over mass of hydrogen = 0.06 g

Mass of HCl produced = 12.41 g

Explanation:

Given data:

Mass of H₂ = 0.40 g

Mass of Cl₂ = 12.35 g

Mass of left over reactant = ?

Mass of HCl produced = ?

Solution:

Chemical equation:

H₂ + Cl₂    →     2HCl

Number of moles of H₂:

Number of moles = mass / molar mass

Number of moles = 0.40 g/ 2 g/mol

Number of moles = 0.2 mol

Number of moles of Cl₂:

Number of moles = mass / molar mass

Number of moles = 12.35 g/ 71 g/mol

Number of moles = 0.17 mol

Now we will compare the moles of HCl with H₂ and Cl₂.

                     H₂             :            HCl

                      1               :               2

                   0.2              :           2×0.2 = 0.4

                     Cl₂             :             HCl

                      1               :              2

                    0.17           :            2 × 0.17 = 0.34

Chlorine is limiting reactant.

Mass of HCl produced:

Mass = number of moles × molar mass

Mass = 0.34 mol × 36.5 g/mol

Mass = 12.41 g

Leftover mass of hydrogen:

                          Cl₂               :               H₂

                            1                :                 1

                           0.17            :             0.17

Number of moles of H₂ react with Cl₂  are 0.17.

Moles remain unreacted = 0.2 - 0.17 = 0.03 mol

Mass left over:

Mass = number of moles × molar mass

Mass = 0.03 mol × 2 g/mol

Mass = 0.06 g

6 0
3 years ago
(NH4)3PO4 + Pb(NO3)4. Pb3(PO4)4 + NH4NO3
Dafna1 [17]

4(NH₄)₃PO₄ + 3Pb(NO₃)₄  →  Pb₃(PO₄)₄ + 12NH₄NO₃

Explanation:

   (NH₄)₃PO₄ + Pb(NO₃)₄  →  Pb₃(PO₄)₄ + NH₄NO₃

Balancing this equation;

  We simply use a mathematical approach by solving simple algebraic equations.

       a(NH₄)₃PO₄ + bPb(NO₃)₄  →  cPb₃(PO₄)₄ + dNH₄NO₃

a,b,c and d are the coefficients that will balance the equation;

   Conserving N:    3a + 4b = 2d  equation 1

                        H:    12a = 4d

                        P;      a = 4c

                        O;      4a + 12b = 16c + 3d

Let us make a = 1;

                      c = \frac{1}{4}

                      d = 3

solving for b;

               from (i);    4b = 2d -3a = 2(3) - 3(1) = 3

                                b = \frac{3}{4}

Now multiply a, b, c and d by 4;

                   a = 4 , b = 3 , c= 1 and d = 12

                4(NH₄)₃PO₄ + 3Pb(NO₃)₄  →  Pb₃(PO₄)₄ + 12NH₄NO₃

Learn more:

Balanced equation brainly.com/question/11102790

#learnwithBrainly

6 0
3 years ago
Consider the image below. What is not accurate about these models?
DaniilM [7]
I believe the first one is correct
5 0
3 years ago
Read 2 more answers
What is the atomic mass of element XX if 3.6 moles of the substance has a mass of 192 grams?
love history [14]

Answer:

53.3g/mol

Explanation

Moles=mass/molar mass

Molar mass= mass/moles

Molar mass= 192/3.6

= 53.3

6 0
3 years ago
Show ur working:
AleksAgata [21]

Answer:

120 g SO3

Explanation:

128 g SO2  -> 160 g SO3

 96 g SO2  -> x

x= (96 g SO2 * 160 g SO3)/128 g SO2

x= 120 g SO3

8 0
4 years ago
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