Answer:
C. Ball A is the densest because it sank to the bottom of the liquid.
Answer:
The solid crystals disappeared
Explanation:
When a soluble solid solute is added to water, the solid solute disappears after a little while. The disappearance of this solute indicates that the solute has been dissolved in water.
In this case, blue copper sulphate crystals are added to water, the blue crystals disappear leaving only a blue solution. The disappearance of these blue copper sulphate crystals indicates that the substance has dissolved in water.
The correct answer to the question you’ve asked would be false
Answer:
The volume at STP of 0,765 moles of carbon monoxide gas is 17, 125 L.
Explanation:
We use the ideal gas formula, with the constant R = 0.082 l atm / K mol. The STP conditions are : 1 atm pressure and 273 K temperature. Solve for the formula, V (volume):
PV=nRT ---> V= (nRT)/P
V= (0,765 mol x0,082 l atm/ K mol x 273 K)/ 1 atm
<em>V= 17, 12529 L</em>
