Organism, community, population, biome and ecosystems. Hope it helps “:)
Answer:
Covalent bond
Explanation:
A covalent bond is formed when two atoms share electrons. The shared electrons are positioned between the nuclei of the bonding atoms.
In the bonding between chlorine and hydrogen, chlorine has seven valence electrons. Hence, it needs one more electron in order for the atom to attain an octet structure. Hydrogen has one valence electron and needs one more electron in order to attain a duplet structure.
The two bonding atoms now share two electrons(provided by each of the bonding atoms) in a covalent bond such that chlorine has a complete octet and hydrogen has a complete duplet.
Answer:
1. 4.32 h
2. 4.12 g/L
Explanation:
1. For a batch culture, the time (tb) can be calculated by:
tb = ln (X/X0)/μmax
Where X0 is the initial mass concentration of the cells (12 g/100L = 0.12 g/L), X is the mass concentration of the cells at tb, and μmax is the maximum specific growth rate of the cells.
The biomass yield (Y) is:
Y = (X - X0)/ (S0 - S)
Where S is the mass concentration of the substrate at tb and S0 the initial mass concentration of the substrate (glucose in this case).
Reorganizing:
X = Y*(S0 -S) + X0
Let's assume that at the stationary state all substrate was consumed, so S = 0.
tb = ln[(YS0 + X0)/X0)]/μmax
tb = ln[(0.575*10 + 0.12)/0.12]/0.9
tb = 4.32 h
2. If 70% of the substrate is consumed, S = 10 - 0.7*10 = 3 g/L
tb = ln[(0.575*(10-3) + 0.12)/0.12]/0.9
tb = 3.93 h
The initial concentration is X0 = 0.12 g/L, the X:
tb = ln (X/X0)/μmax
3.93 = ln(X/0.12)/0.9
ln(X/0.12) = 3.537
X/0.12 =
X/0.12 = 34.36
X = 4.12 g/L
Answer:
7.17 g/mL
Explanation:
Density = Mass / Volume
Given mass of object : 80.4g
We are not given the objects volume, however we are given that when put inside of a container with 20.0mL water, the level of the water rises to 31.2 mL.
31.2 - 20 = 11.2
The water level rose 11.2 mL when the object was placed inside of the cylinder containing the water therefore the object has a volume of 11.2mL
Now to find it's density
recall that density = mass / volume
mass = 80.4 and volume = 11.2mL
so density = 80.4/11.2 = 7.17 g/mL