Why does magma composition change during fractional crystallization? Different elements in the magma form crystals at different rates, leaving behind more of the unused elements. ... The crystals are denser than the magma.
B is true because plants can only use nitrogen in the form of nitrates, no other living thing needs nitrogen therefore the percentage of nitrogen in the atmosphere is 79%
767.448 Joules of heat is required.
You use the equation Q=MCdeltaT
Make sure you convery celsius to Kelvin
Specific heat of water is 4.18
So it will be Q=2.55(4.18)(72)
Q=767.448
Josh was sure that the reaction occurred because of the formation of carbon dioxide (CO₂) which is a gas.
Explanation:
Vinegar contains acetic acid (CH₃-COOH) and baking soda is sodium hydrogen carbonate (NaHCO₃). The reaction between these two compounds will produce sodium acetate (CH₃-COONa), carbon dioxide (CO₂) and water (H₂O).
CH₃-COOH + NaHCO₃ → CH₃-COONa + CO₂ + H₂O
Josh was sure that the reaction occurred because of the formation of carbon dioxide (CO₂) which is a gas.
Learn more about:
carbon dioxide
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