Answer:
exothermic
Explanation:
heat/energy is released when it burns.
The force that holds you up is called gravity.
Gravity is the force that makes sure that you can't go bouncing off into the atmosphere like how it is on Mars.
Answer: Gravity
Hope this helps:)
Answer:
55
Explanation:
25g is less dense than 80g therefore will mostly float. if you subtract 80-25 that will leave you will 55 as the difference
<span>The enthalpy of an intermediate step when used to produce an overall chemical equation should be manipulated in this way:
</span><span>Multiply the enthalpy by –1 if the chemical equation is reversed.
If the forward reaction requires energy, the reverse will produce energy.</span>
Answer:
3.75mole
Explanation:
Given parameters:
Mass of the carbon(C) = 45g
Unknown:
Number of moles of carbon = ?
Solution:
The number of moles of a substance can be found using;
Number of moles =
Molar mass of carbon = 12g/mol
Number of moles =
= 3.75mole