Answer:
Mass: 981.0 g
Density: 5.61 g/cm^3
Hardness: = 2.5 - 3
Unknown material: Chalcocite
Answer:
0.39 moles
Explanation:
To find how many moles are in 50.0 g of CaC₂O₄ you divide the grams of the sample by the molar mass of the compound;
=0.39 mol
The grams cancel out and you are left with moles!
I hope this help ^-^
Answer:
0.6364 g/cm^3
Explanation:
Density = mass/volume
Where mass = 5.6g and...
Volume = (33.9 - 25.1) = 8.8ml
Where 1ml = 1 cm^3
Density = 5.6/8.8 = 0.6364 g/cm^3
Answer: No.
Explanation: A negative integer can only be made with 2 negative integers or 1 positive and 1 negative integer.