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Karolina [17]
4 years ago
7

How are hypotheses different from theories?

Chemistry
1 answer:
juin [17]4 years ago
4 0

Answer:

Explanation:

This is the Difference Between a Hypothesis and a Theory. In scientific reasoning, a hypothesis is an assumption made before any research has been completed for the sake of testing. A theory on the other hand is a principle set to explain phenomena already supported by data.

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PLEASE HELP MEEEEEEE
Sliva [168]
Amount of copper= mass / molar mass = 17/64=0.2656
According to the balance equation, amount of hydrogen gas : amount of copper = 1:1
Therefore amount of hydrogen gas is 1:1
Thus mass of hydrogen gas is molar mass x mol= 1 x 0.2656= 0.266g
3 0
3 years ago
The molar mass of the compound was found to be 30.069 g/mol. what is the molecular formula? express your answer as a chemical fo
kodGreya [7K]

For us to accurately determine what compound this is, additional info must be given. However I can suggest two compounds which have molecular mass of about 30.07 g/mol.

1. It could be NO or nitric oxide.

The molecular mass is 16 + 14= 30 g/mol

But if we search the exact weight, it is 30.01 g/mol

 

2. It could also be (CH3)2  or ethane.

The molecular mass is 2*12+ 6*1= 30 g/mol

But if we search the exact weight, it is 30.07 g/mol.

 

<span>So we could say it more likely to to be (CH3)2 </span>

6 0
4 years ago
How many atoms are present in 3.1 moles of copper?
ozzi

Answer:

<h2>1.8662 × 10²⁴ atoms</h2>

Explanation:

The number of atoms can be found by using the formula

N = n × L

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

We have

N = 3.1 × 6.02 × 10²³

We have the final answer as

<h3>1.8662 × 10²⁴ atoms</h3>

Hope this helps you

8 0
3 years ago
Friction. That was the topic Sally and Sue are investigating in science. They used a small car and a ramp as seen in the
DaniilM [7]

Answer: A: The smoother the ramp surface, the greater the car's speed.

Explanation: I did the USA test prep

3 0
3 years ago
If the equilibrium concentration of NO, is 1.78 x 10-2 M, the equilibrium concentration of N2O4 is
padilas [110]

Answer:

The equilibrium lies to the left.

5.42 x 10^-2

Explanation:

3 0
4 years ago
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