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Lesechka [4]
3 years ago
12

______________________ produce evidence that helps to answer important questions or could also lead to new questions.

Chemistry
1 answer:
lesya [120]3 years ago
4 0

Answer:

It is B theories

Explanation:

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What is the concentration of a solution which is 2g in 150cm3 in g/dm3
Irina-Kira [14]

Answer:

13.33 g/dm³

Explanation:

Concentration (g/dm³)= mass(g) ÷ volume (dm³)

Now you need to convert 150 cm³ to dm³

1000cm³ = 1 dm³

thus, 150 cm3= 150 ÷ 1000

= 15dm³

and you already have mass in grams

so concentration  = 2 ÷ 0.15

= 13.33 g/dm³ and there you go.. solved ;)

8 0
2 years ago
I need help with these two questions
natulia [17]
I'm not sure about 2 but in 3 it would float
8 0
2 years ago
How does a liquid substance change into gas? ​
Afina-wow [57]

Answer: heat

Explanation:

Is that heat boils the liquid and the liquid eventually evaporated into gas

3 0
3 years ago
Write the balanced equation for a reaction between aqueous nitric acid (HNO3) and solid lithium metal (this is a single replacem
Lemur [1.5K]

<u>Answer:</u> The equation is given below.

<u>Explanation:</u>

Single replacement reactions are the chemical reactions in which more reactive metal displaces a less reactive metal from its chemical reaction. General equation for these reactions is given by the equation:

A+BC\rightarrow AC+B

Metal A is more reactive than metal B.

The reactivity of metals is judged with the help of reactivity series. In this series, the metals lying above are more reactive than the metals which lie below in the series.

For the reaction of solid lithium metal and nitric acid, the equation follows:

3Li(s)+4HNO_3(aq.)\rightarrow 3LiNO_3(aq.)+2H_2O(l)+NO(g)

This is a type of single replacement reaction because Lithium (more reactive metal) is replacing Hydrogen (less reactive metal) from the chemical reaction.

3 0
3 years ago
Which is not a property of a pure substance?
mr Goodwill [35]

varying composition is not a property of a pure substance

8 0
2 years ago
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