It is electrical to mechanical
the number grams of lead chromate formed is calculated as follows
write the reaction equation
Pb(No3)2 + K2CrO4 ----> 2KNO3 + PbCrO4
then calculate moles of each reagent
that is moles of Pb(No3)2 = 15 x0.40/1000= 6 x10^-3 moles
moles of K2CrO4 = 15 x0.15/1000= 2.25 x10^-3moles
K2CrO4 moles are the limiting reagent therefore by use of reacting ratio between K2CrO4 to PbcrO4 the moles of pbcro4 is
2.25 x10^-3 moles
mass is therefore = (2.25 x10^-3) x 323.19(molar mass of PbCrO4) = 0.727 g
Answer:
21.2 grams CH2Cl2
Explanation:
Number of moles: .25
Molar mass of CH2Cl2: 84.93 g/mol
Mass in grams: 84.93(0.250) = 21.2325
When an atom gains an electron it becomes a negatively charged ion. When an atom looses an electron it becomes positively charged because the number of positively charged protons.
Hope this helps
Answer : The mass of oxygen combined with 1.00 g of carbon in carbon dioxide will be, 2.66 grams.
Explanation :
Law of multiple proportion : It states that when two elements can combine to form two or more different compounds then the mass of one element compared to fixed mass of the other will always be in a ratio of small whole numbers.
As we are given that the mass of ratio of carbon and oxygen in CO is 1 gram and 1.33 gram.
Ratio of C and O in CO = 1 : 1
Ratio of C and O in CO₂ = 1 : 2
So, the mass of ratio of carbon and oxygen in CO₂ will be 1 gram and (2×1.33) 2.66 gram.
Thus, the mass of oxygen combined with 1.00 g of carbon in carbon dioxide will be, 2.66 grams.