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Kipish [7]
3 years ago
12

A physical change :_______

Chemistry
2 answers:
sattari [20]3 years ago
8 0
A) occurs when water is evaporated.
aev [14]3 years ago
8 0
Definitely A, a physical change occurs when water is evaporated.
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234+34.1 add and round to 2 significant figures
marin [14]
Like this? 234+34.1= 268.1 then round. If it is less than 5 then you round down if it is more then you round up. Because it is less the final number would be 268.1=268
3 0
3 years ago
Is it possible to convert between moles and mass?
lubasha [3.4K]

Answer:

Yes, if you're talking about molar mass or grams

Explanation:

Hope this helps!

5 0
3 years ago
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Convert 123 in scientific notation
dalvyx [7]
✡ Answer: 1.23*10^2 ✡


- - Add a decimal at the end (to the right) and count till you get to the first number.
So now you have 1.23

- - Now you always want to times it by 10 to the power of how many times you moved it over, in this case, 2

Final answer: 1.23*10^2

✡Hope this helps✡


4 0
3 years ago
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A gas with a volume of 500. mL at 75°C is heated to 225 °C. What is the new volume of the gas?
mihalych1998 [28]
Using v1/t1=v2/t2
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500/368=v2/498
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6 0
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How could Mendeleev predict the properties of elements that had not yet been discovered?
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It was the element of aluminium where they predict their properties <span />
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