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3 years ago

How can you describe the scientific method

Chemistry

2 answers:

3241004551 [841]3 years ago

7 0

There is 5 basic methods

jolli1 [7]3 years ago

3 0

There are 5 basic steps to the scientific method plus an extra feedback one too
1. Make Observations
2 Ask a Question
3. Form up a Hypothesis, or you can make a testable explanation
4. Predictions based on your Hypothesis or Explanation
5. Test that Prediction
6. Use your results to make a new hypothesis or testable explanation

Hope This Has Helped You!!!

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How many mL of 0.100 M NaOH are needed to neutralize 50.00 mL of a 0.150 M solution of CH3CO2H, a monoprotic acid? How many mL o

Rama09 [41]

Answer:

We need 75 mL of 0.1 M NaOH ( Option C)

Explanation:

Step 1: Data given

Molarity of NaOH solution = 0.100 M

volume of 0.150 M CH3COOH = 50.00 mL = 0.05 L

Step 2: The balanced equation

CH3COOH + NaOH → CH3COONa + H2O

Step 3: Calculate moles of CH3COOH

Moles CH3COOH = Molarity * volume

Moles CH3COOH = 0.150 M * 0.05 L

Moles CH3COOH = 0.0075 moles

Step 4: Calculate moles of NaOH

For 1 mol of CH3COOH we need 1 mol of NaOH

For 0.0075 mol CH3COOH we need 0.0075 mole of NaOH

Step 5: Calculate volume of NaOH

volume = moles / molarity

volume = 0.0075 moles / 0.100 M

Volume = 0.075 L = 75 mL

We need 75 mL of 0.1 M NaOH

7 0

3 years ago

What type reaction is in the example below? Na-Br + Cl-Cl --> Na-Cl + Br-Br

Elis [28]

The type of reaction in the example below is a double replacement.

A double replacement can be identified by the switch between two reactants. This can be verified because both a Br and Cl are being switched to a new position in the reaction.

8 0

4 years ago

Determine whether each of the following statements about sulfur oxide and/or nitrogen oxide pollution is true or false.

astraxan [27]

Answer:

a) False

b) False

c) True

Explanation:

a) Most sulfur oxides formed during combustion come from sulfur in the air: The sulfur burns in presence of oxygen to produce sulfur oxides, the source of sulfur is anthropogenic activities (Human activities).

So the given statement is false.

b) A flue gas scrubber removes SO2 pollution in a coal-fired power plant by using lime to convert the SO2 into alcohols:

False

The lime reacts with sulfur dioxide to give carbon dioxide and calcium sulfite.

$CaCO_{3}+SO_{2}--->CaSO_{3}+CO_{2}$

c) True

3 0

3 years ago

How do I calculate the mass in grams of 8.0 mol lead oxide (PbO)?

omeli [17]

Answer:

Mass = 1785.6 g

Explanation:

Given data:

Moles of lead oxide = 8 mol

Mass in grams = ?

Solution:

Formula:

Number of moles = mass/ molar mass

Mass = number of moles × molar mass

Molar mass of PbO = 223.2 g/mol

Now we will put the values.

Mass = 8 mol × 223.2 g/mol

Mass = 1785.6 g

Thus 8 moles of lead oxide have 1785.6 grams.

5 0

4 years ago

A 2.0 mL sample of air in a syringe exerts a pressure of 1.02 atm at 22 C. If that syringe is placed into boiling water at 100 C

emmainna [20.7K]

Answer: The new volume of the air in the syringe is 7.3 mL.

Explanation:

Given: $V_{1}$ = 2.0 mL, $P_{1}$ = 1.02 atm, $T_{1} = 22^{o}C$

$V_{2}$ = ?, $P_{2}$ = 1.27 atm, $T_{2} = 100^{o}C$

Formula used to calculate the new volume in syringe is as follows.

$\frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}$

Substitute the values into above formula as follows.

$\frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}\\\frac{1.02 atm \times 2.0 mL}{22^{o}C} = \frac{1.27 atm \times V_{1}}{100^{o}C}\\V_{1} = 7.3 mL$

Thus, we can conclude that the new volume of the air in the syringe is 7.3 mL.

6 0

3 years ago