1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vredina [299]
3 years ago
11

127) Thirty-six colonies grew in nutrient agar from 1.0 ml of undiluted sample in a standard plate count. How many cells were in

the original sample?
Chemistry
1 answer:
SIZIF [17.4K]3 years ago
6 0

Answer:

36

Explanation:

Since the sample was undiluted the number of colonies is the number that grew on the nutrient agar which is 36 colonies. If it was diluted for example let say 0.1 ml from a dilution in which 1 ml of the sample was added to 9 ml of water, and it grew  colonies then  0.1 ml  yielded  6 colonies, 1 ml of the diluted sample will yield 60 colonies and 10 ml will have 600 colonies and therefore the 1 ml undiluted sample will have 600 colonies.

You might be interested in
Select the correct answer. Two charged objects, A and B, exert an electric force on each other. What happens if the distance bet
VikaD [51]

Answer:

The electric force between them decreases

Explanation:

The force between two charged particle is given by :

F=\dfrac{kq_1q_2}{r^2}

Where

r is the distance between charges

If the distance between the charges is increased, the electric force gets decreased as there is an inverse relation between force and distance.

Hence, the correct option is (c) "The electric force between them decreases"

7 0
2 years ago
A chemical reaction can theoretically produce 1375.5 grams of product , but in actuality 112.9 grams are product . Which is the
zalisa [80]

Answer:

8.20 % → Percent yield reaction

Explanation:

To find the percent yield of reaction we apply this:

(Produced yield / Theoretical yield) . 100 = %

Produced yield = 112.9 g

Theoretical yield = 1375.5 g

We replace → (112.9g / 1375.5 g) . 100

8.20 % → Percent yield reaction

3 0
3 years ago
How many molecules are in 97.21 grams of Sodium Chloride (NaCl)?
professor190 [17]
1.66 is the answer because it’s is
6 0
3 years ago
When a new bond forms in a chemical reaction, what happens?
Kisachek [45]
The answer to this question would be A. Energy is released. 

When a chemical bond is a form, the bond will either suck up energy or produce energy. So, to be precise the energy is not always released but also can be absorbed. In this case, the energy released number will be a minus.

Options B and C is definitely wrong since the bond is formed by an electron, it won't affects neutron/proton.
Option D might be true since the product is made of 2 or more atoms then it would seem larger. But the size of the actual atom won't be increased.

8 0
3 years ago
Read 2 more answers
6 CO2 + 12 H2O C6H12O6 + 6 H2O + 6 O2<br><br>how many hydrogen atoms are involved in this reaction?
Romashka-Z-Leto [24]
How many hydrogen atoms are involved in this reaction? 3
7 0
3 years ago
Other questions:
  • If the pressure of a sample of gas is doubled at constant temperature, what happens to the volume of the gas?
    10·2 answers
  • The average density of whole milk is 1.034 g cm ^3. What is it’s density in lb gal ^-1?
    10·2 answers
  • According to cell theory, what do these four organisms have in common? A) They are made of one or more cells. B) They must under
    12·1 answer
  • The residue of coal decomposition that is used in the manufacture of steel is called
    7·1 answer
  • 20 POINTS Use the problem below to answer the question: 34 grams of carbon react with an unlimited amount of H2O. The reaction i
    5·1 answer
  • If you have 45.6mL of a liquid and its
    9·1 answer
  • Starting with 2.50 mol of N2 gas (assumed to be ideal) in a cylinder at 1.00 atm and 20.0C, a chemist first heats the gas at con
    15·1 answer
  • Question 3 of 10
    8·2 answers
  • Convert 3.9 kcal into calories.
    12·1 answer
  • Which describes a characteristic of water that is responsible for frost wedging? (1 point) O Water expands as it freezes O Water
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!