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OLga [1]
3 years ago
11

Which of the following is the best hypothesis?

Chemistry
1 answer:
Drupady [299]3 years ago
6 0

Answer:

THE CORRECT ANSWER IS A

sorry for caps

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How can u tell if an object has elastic properties
lana [24]
If two people pull on it, it maintains its original size and shape. Hope it helps.
5 0
3 years ago
A gas is produced when 25 g of substance X is mixed into 60 g of solution Z in a beaker. The mass of the solution in the beaker
Zepler [3.9K]

mass of the gas = 10 g

<h3>Further explanation</h3>

<em>The law of conservation of mass :</em>

<em>In a closed / isolated system, the total mass of the substance before the reaction will be equal to the total mass of the reaction product.</em>

Reaction

\tt X+Z\rightarrow gas+solution

mass before reaction=mass after reaction

\tt 25+60=gas+75\\\\gas=25+60-75=10~g

5 0
3 years ago
Determine how many significant figures are in each measurement.(9pts)
Strike441 [17]
1. 3 significant figures
2. 5 significant figures
3. 3 significant figures
4. 4 significant figures
5. 5 significant figures
6. 2 significant figures
7. 4 significant figures
8. 1 significant figure
9. 4 significant figures
5 0
3 years ago
I need help with this:
earnstyle [38]

1 send astronauts to space and saw the earth round

2 saying something to do

3 science that been solved

4 science had have no evidence

5 have proved and stories

4 0
3 years ago
Read 2 more answers
In a laboratory, bunsen burner is used to increase the temperature of lime from 10 °C to 50 °C with the thermal energy of 80000
galina1969 [7]

Answer:

c = 100 J/g.°C

Explanation:

Given data:

Mass of lime = 20 g

Heat absorbed = 80,000 J

Initial temperature = 10°C

Final temperature = 50°C

Specific heat capacity of lime = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 50°C - 10°C

ΔT = 40°C

80,000 J = 20 g×c×40°C

80,000 J = 800°C×c

c = 80,000 J /800g.°C

c = 100 J/g.°C

3 0
3 years ago
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