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abruzzese [7]
3 years ago
15

A bacterial colony is grown in a laboratory under controlled conditions. Based on the data, we would expect the bacterial popula

tion to double in about ____ hours. A) 12 B) 15 C) 22.5 D) 30
Chemistry
2 answers:
Leto [7]3 years ago
8 0

bacterial population to double in about 15 hours

Alika [10]3 years ago
6 0

Answer:

A) 12 hours approximately

Duplication times vary depending on the microorganism in question.

Explanation:

Bacterial growth is the division of a bacterium into two daughter cells in a process called binary fission. Assuming that no case of mutation occurs, the resulting daughter cells will be genetically identical to the original cell. In this way the duplication of the bacterial population takes place.  The bacterial population experiences exponential growth.

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What is the molecular weight of a gas that diffuses through a porous membrane 2.17 times faster than Xe?
vivado [14]

Answer: The molecular weight of the gas 28. The gas is probably N2

Explanation:Please see attachment for explanation

8 0
3 years ago
When two forces acting on an object are equal, they are
TEA [102]
The answer is balanced forces
7 0
3 years ago
Suppose a student titrates a 10.00-ml aliquot of saturated ca(oh)2 solution to the equivalence point with 16.08 ml of 0.0199 m h
Alborosie
Following chemical reaction is involved upon titration of Ca(OH)2 with HCl,
Ca(OH)2 + 2HCl ↔ CaCL2 + 2H2O

Above is an example of acid-base titration to generate salt and water. Here, H+ ions of acid (HCl) combines with OH- (ions) of base [Ca(OH)2] to generated H2O

Given,
concentration of HCl = 0.0199 M
Total volume of HCl consumed during titration = 16.08 mL = 16.08 X 10^(-3) L

∴, number of moles of H+ consumed = Molarity X Vol. of HCl (in L)
                                                           = 0.0199 X 16.08 X 10^(-3)
                                                           = 3.1999 X 10^-4 mol
Thus, total number of moles of [OH-] ions present initial = 3.1999 X 10-4 mol
So, initial conc. [OH-] ion = 
\frac{number of moles of [OH-]}{volume of solution (L)} = \frac{3.1999 X 10^(^-^4^)}{10 X 10^(^-^3^)} = 0.03199 M
6 0
3 years ago
How moles are in 45.7g of CH3?
miskamm [114]

first find the atomic weight of CH3 which would be

atomic weight: 12.011 (3×1.008) = 36.32 g/mol

then find the moles in the given mass

36.32 ÷ 45.7 = 0.794

I HOPE I'M NOT WRONG I HAVENT DONE CHEM IN SO LONG

6 0
3 years ago
What is the ROUNDED atomic number for this elements?
denis-greek [22]
Sodium/Atomic number

11

Gold/Atomic number

79
Potassium/Atomic number

19

Silicon/Atomic number

14




8 0
3 years ago
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