A) the independent variable is the variable that doesn’t rely on another variable. For this question the independent would be the days.
b) the dependent variable is the number of bacteria
c) ‘Number of bacteria across a number of days’
Answer:
a) 210.3 g/mol
b) 210.2 g/mol
c) 384.5 g/mol
Explanation:
First step we will calculate the molar masses of ; carbon atom, hydrogen atom and oxygen atom in each .
<u> Molar mass of dibenzyl ketone</u>
Molar mass of dibenzyl ketone = ∑ molar masses of atoms in dibenzyl ketone
= carbon( 15 ) = 15 ( 12.0107 ) + oxygen ( 14 ) = 1 ( 15.999 ) + hydrogen(14) =14(1.00784)
= 210.26926 ≈ 210.3 g/mol
<u> Molar mass of benzil</u>
Molar mass of Benzil = ∑ molar masses of atoms in Benzil
= carbon( 14) = 14(12.0107) + oxygen(2) = 2 ( 15.999) + hydrogen(10) =10(1.00784)
= 210.2262 ≈ 210.2 g/mol
<u>Molar mass of 2,3,4,5-tetraphenylcyclopentadienone</u>
Molar mass = ∑ molar masses of atoms
= carbon ( 29) = 29(12.0107) + oxygen (1) = 1( 15.999 ) + hydrogen(20) = 20(1.00784 )
≈ 384.5 g/mol
Answer:
there are three process of heat transfer:conduction,convection,radiation
Answer:
percentage by mass of Ba = 0.4583/0.8360 × 100 = 45.83
/0.8360 = 54.82%
Explanation:
The mass of Barium in the original compound is the same as the masss of barium in the precipitate BaSO4.
Ba²+
molar mass of BaSO4 = 137 + 32 + 16(4) = 137 + 32 + 64 = 233 g/ mol
since
137 grams of barium is in 233 g of BaSO4
? grams of barium is in 0.7794 g of BaSO4
cross multiply
grams of barium = 0.7794 × 137/233
grams of barium = 106.7778/233
grams of barium = 0.45827381974
grams of barium = 0.4583 grams
percentage by mass of Barium in the original compound =
mass of barium/ mass of the compound × 100
mass of barium = 0.4583 g
mass of compound = 0.8360 g
percentage by mass of Ba = 0.4583/0.8360 × 100 = 45.83
/0.8360 = 54.82%
Answer:
i dunno if this helps :(
Explanation:
Heat is energy transferred between substances or systems due to a temperature difference between them, according to Energy Education. As a form of energy, heat is conserved, i.e., it cannot be created or destroyed. It can, however, be transferred from one place to another.
