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
What is 0.00996 written in scientific notation
Troyanec [42]
0.00996 in scientific notation is 0.0996e-1.
7 0
3 years ago
For a certain reaction A → products a plot of ln[A] vs. time produces a straight line with a slope of −3.0×10−2 s−1. Which of th
Zarrin [17]

Answer:

Statements I and II are true.

Explanation:

Let us consider the reaction A → products.

Which of the following statements is or are true?

I. The reaction follows first-order kinetics. TRUE

The expression for a first-order reaction is:

ln[A] = ln[A]₀ - k.t    [1]

where,

[A] is the concentration of the reactant A at certain time t

[A]₀ is the initial concentration of A

k is the rate constant

t is the time

If the plot of ln[A] vs. t A is a straight line, it means that the reaction follows a first-order kinetics.

II. The rate constant for the reaction is 3.0×10⁻² s⁻¹. TRUE.

In [1], ln[A]₀ is the intercept and -k the slope of the linear equation. Thus,

-k = −3.0×10⁻² s⁻¹

k = 3.0×10⁻² s⁻¹

III. The initial concentration of [A] was 1.0 M. FALSE.

Since we do not have information about the intercept in the plot of ln[A] vs. t, we do not have enough information to calculate the initial concentration of A.

Statements I and II are true.

3 0
3 years ago
Karen has a mass of 53 kg as she rides the up escalator at woodley park station of the washington
aivan3 [116]
  <span> Vertical height of longest escalator in free world = 58.8 sin 32.4 = 31. 5 m
Karen's mass = 54.6 kg
Work done on Karen = mgh = 54.6(9.81)(31.5) = 1.69e4 J = 16.9 KJ ANS </span>
7 0
3 years ago
HNO3 Express your answers as ions separated by a comma.
erastovalidia [21]
In this item, it is assumed that we are to express the given compound in their ionic form. To be able to determine as to what ions this compound will dissociate into, we have the chemical reaction.

                     HNO3 --> H⁺  + NO₃⁻

Hence, the ions are H⁺, NO₃⁻. 
4 0
3 years ago
In the presence of an emulsifying agent, a mixture of oil and water becomes a _____.
Paladinen [302]
In the presence of an emulsifying agent, a mixture of oil and water becomes a colloidal dispersion.
Colloidal dispersion <span><span>otherwise </span>colloid</span><span> is </span><span>a system, in which discrete particles, droplets or bubbles of a dispersed phase (in this case oil), whose size at least in one dimension is in the range from 1 to 1000 nm are distributed in the other, usually continuous phase - dispersion medium (in this case water) differing from the dispersed phase in composition or state of aggregation.</span>

8 0
3 years ago
Other questions:
  • A poundal is the force required to accelerate a mass of 1 lbm at a rate of 1 ft/s2, and a slug is the mass of an object that wil
    5·1 answer
  • Consider the unbalanced equation for the combustion of hexane:
    14·1 answer
  • A weak acid. What is the pH of a 0.1 M solution of acetic acid (pKa = 4.75)?
    7·1 answer
  • Which element has the largest atomic radius
    8·2 answers
  • What do all eukaryotic cell have in common?
    13·1 answer
  • What Is wrong with the name, nitrogen (V) monoxide?​
    8·1 answer
  • Pure water has a pH of 7. Pure water _______.
    12·1 answer
  • 2) A wooden block has a volume of 176 cm3 and a density of 18.2 g/ cm3. What is the mass?
    14·1 answer
  • 1. What type of circuit is in the diagram?<br> parallel circuit<br> series circuit
    9·1 answer
  • SEP Develop a Model Write the skeleton equation for the reaction of iron and
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!