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
Norma-Jean [14]
3 years ago
12

PLS HELP-CHEMISTRY: What is the molar concentration of an ammonia solution in which there are 0.1557 grams

Chemistry
1 answer:
harina [27]3 years ago
4 0

Answer: M = 0.036 M

Explanation: Solution attached:

First convert mass of NH3 to moles

Next convert volume in mL to L

Use the formula for Molarity

M = n / L

You might be interested in
A buffer solution is made using a weak acid, HA. If the pH of the buffer is 9 and the ratio of A– to HA is 100, what is the pKa
sdas [7]
To calculate the pKa of the weak acid, we use the Henderson-Hasselbalch equation. It is expressed as pH = pKa - log [HA]/[A-]. This equation takes into account the concentration of the substance that does not dissociates into ions since it is a weak acid. We caculate as follows:

pH = pKa - log [HA]/[A-]
9 = pKa - log 1/100
pKa = 7
3 0
3 years ago
What does the survival of the fittest mean
Tomtit [17]
It means that the fit and well adjusted ones thrive and "make it", and the weak ones that can't adapt die.
7 0
3 years ago
A fish is removed from a contaminated lake. You determine that a particular toxin (X) is present in its cells at concentration X
netineya [11]
The level of toxins in the fish's cell is equivalent to the level of toxins in the water. Therefore, in order to reduce the toxins further, we should replace the now contaminated water with clean water. After the level of toxins in the fish's cell stops reducing, we replace the water with clean water once again.
3 0
2 years ago
Notice that "SO4" appears in two different places in this chemical equation. SO42− is a polyatomic ion called "sulfate." What nu
vichka [17]

Answer:

3.

Explanation:

Hello,

In this case, it is convenient to write the chemical reaction as:

CaSO_4+AlCl_3\rightarrow CaCl_2+Al_2(SO_4)_3

Which balanced turns out:

3CaSO_4+2AlCl_3\rightarrow 3CaCl_2+Al_2(SO_4)_3

Thus the number that should be in front of the calcium sulfate is 3 in order to balance the reaction.

Best regards.

8 0
2 years ago
What is peristalsis? PLEASE HELPP
ladessa [460]

Answer:

Muscular contractions that moves food along the digestive tract.

5 0
3 years ago
Read 2 more answers
Other questions:
  • If a glass bottle breaks into thousands of tiny pieces, what type of change occurs? A. physical only B. chemical only C. physica
    5·2 answers
  • What is the purpose of taller emissions stacks in industrial settings? a) They are intended to release particulates where there
    11·2 answers
  • I need to know the answers
    13·1 answer
  • Why can't all the mixtures be classified as solutions?
    13·1 answer
  • a substance which alters the rate of a chemical reaction but is not permanently changed by the reaction is called a(n)__________
    11·1 answer
  • How many chloride ions are in 1.5 moles of aluminum chloride?
    13·1 answer
  • An increase in which of the following does not increase the rate of a chemical reaction?
    15·1 answer
  • Please help asap!!!!!!!!!!! How many molecules are present in 0.5 moles of NaOH?
    9·1 answer
  • A gas with a volume of 250 mL at a temperature of 293K is heated to 324K. What is the new volume of the gas?
    15·1 answer
  • Explain in detail, at a cellular level, how genetic information is passed from biological parents to offspring. Include the term
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!