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Kryger [21]
3 years ago
5

Data definition from scientific method

Chemistry
1 answer:
mixas84 [53]3 years ago
8 0

Answer:

a method of research in which a problem is identified, relevant data are gathered, a hypothesis is formulated from these data, and the hypothesis is empirically tested.

Hope this helps:)

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Hurry plz
erik [133]

Answer:

1) The correct step in the scientific method that Victor did is Construct a hypothesis.

2) Given mass and density, volume is calculated as mass divided by density.

Explanation:

1) Before doing the assay and make a graph with the results obtained, Victor should think what he wants to prove, so he should make a hypoythesis to test with the assay.

2) The formula of density is

density = mass/volume ⇒ density x volume = mass ⇒                      volume = mass/density.

4 0
3 years ago
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Which is the state of matter shown in this figure ?
Veronika [31]

Answer:

Solid

Explanation:

The particles are densely packed and in a defined shape, therefore they would be defined as a solid.

5 0
3 years ago
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1) The heat of combustion for the gases hydrogen, methane and ethane are −285.8, −890.4 and −1559.9 kJ/mol respectively at 298K.
Morgarella [4.7K]

Answer:

The enthalpy of the reaction is 64.9 kJ/mol.

Explanation:

H_2 + \frac{1}{2}O_2\rightarrow H_2O,\Delta H_1 =-285.8 kJ..[1]

CH_4 + 2O_2\rightarrow CO_2 + 2H_2O,\Delta H_2 =-890.4 kJ..[2]

C_2H_6 + \frac{7}{2}O_2\rightarrow 2CO_2 + 3H_2O,\Delta H_3= -1559.9 kJ..[3]

2CH_4(g)\rightarrow C_2H_6(g) + H_2(g),\Delta H_4=?..[4]

2 × [2] - [1]- [3] = [4]  (Using Hess's law)

\Delta H_4=2\times \Delta H_2 -\Delta H_1 -\Delta H_3

\Delta H_4=2\times (-890.4 kJ)-(-285.8 kJ) -(-1559.9 kJ)

\Delta H_4=64.9 kJ/mol

The enthalpy of the reaction is 64.9 kJ/mol.

3 0
3 years ago
Aspirin is a common headache treatment, and it needs to dissolve into the blood to work on a person. Which will work faster, asp
bulgar [2K]
Powder. It will dissolve faster and should provide rapid pain relief.
8 0
3 years ago
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If an object floats in water , what can you tell about its density ?
ankoles [38]
The easiest answer and most relevant is because it didn't sink
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7 0
3 years ago
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