Answer:
no answer
Explanation:
because he knew that eventually other elements would be discovered to fit into those spaces. The elements in the same group or column have similar properties.
The correct answer is <span>a. CaO(s) + H2O(l) Ca(OH)2 (s)
</span><span>Decreasing in entropy means that you have to get a solid from the liquid
</span>therefore : <span>CaO(s) + H2O(l) Ca(OH)2 (s)
This formula will make it absolutely clear
</span>
Answer:
2.9g/cm^3
Explanation:
We're given that the mass of the system before the rock was added was
120g
. The mass after the rock was added was 250g, so the rock's mass is 130g.
The initial volume of water in the graduated cylinder was
30
mL
, and the volume after the rock was added read 75mL
, so the rock's volume is 45mL
Density = Mass over Volume.
AKA. 130g/45mL
2.9g/cm^3 (rounded)
Answer:
mass
Explanation:
How much does air weigh? It might not seem like it, but air has weight. Anything with mass has weight, and we know air has mass because (for example) we can feel it when the wind blows. The total weight of the atmosphere exerts a pressure of about 14.7 pounds per square inch at sea level.
-weatherstreet.com