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
rodikova [14]
2 years ago
14

How many moles are in 63 g of NH4 (molar mass= 18g)?

Chemistry
2 answers:
sdas [7]2 years ago
4 0

To answer this question, all you to do is to divide the mass by the molar mass and that should get you your moles.

=63g\ NH_{4}\ x\ \frac{1\ mol\ NH_{4}}{18g\ NH_{4}}

<em>= 3.5 mol NH₄</em>

<em></em>

<em></em>

Natalka [10]2 years ago
3 0

\qquad \qquad\huge \underline{\boxed{\sf Answer}}

Here's the solution ~

\qquad \sf  \dashrightarrow \: 18g = 1 \: mole

\qquad \sf  \dashrightarrow \: 1g =  \dfrac{1}{18}  \: moles

\qquad \sf  \dashrightarrow \: 63g =  \dfrac{1}{18}   \times 63\: moles

\qquad \sf  \dashrightarrow \: 63g =  \dfrac{7}{2}    \: moles

\qquad \sf  \dashrightarrow \: 63g = 3.5  \: moles

Correct choice is C

You might be interested in
PLEASE HELP I WILL GIVE BRAINLIEST!!! Its due tonight at 12:00
Dmitry [639]

Answer:

c

Explanation:

we have only distance vs time graph so c is the right answer that cart is moving with constant speed of 0.5m/s

confirmed

first calculate distance which is from 2 to 5.5

5.5-2=3.5

apply the formula of velocity

v=s/t

v=3.5/7=0.5

8 0
2 years ago
Read 2 more answers
Which of the following units is used to measure force ?
Sati [7]
C.) Newton. & it's S.I. Unit of Force.

Hope this helps!
3 0
3 years ago
Read 2 more answers
A solution that is 0.20 m in hcho2 and 0.15 m in nacho2 find ph
Mashutka [201]
We are given
0.2 M HCHO2 which is formic acid, a weak acid
and
0.15 M NaCHO2 which is a salt which can be formed by reacting HCHO2 and NaOH

The mixture of the two results to a basic buffer solution
To get the pH of a base buffer, we use the formula
pH = 14 - pOH = 14 - (pKa - log [salt]/[base])

We need the pKa of HCO2
From, literature, pKa = 1.77 x 10^-4
Substituting into the equation
pH = 14 - (1.77 x 10^-4 - log 0.15/0.2)
pH = 13.87

So, the pH of the buffer solution is 13.87
A pH of greater than 7 indicates that the solution is basic and a pH close to 14 indicates high alkalinity. This is due to the buffering effect of the salt on the base.
5 0
3 years ago
n an experiment, 39.26 mL of 0.1062 M NaOH solution was required to titrate 37.54 mL of \ v unknown acetic acid solution to a ph
olasank [31]

Answer:

Molarity: 0.111M

% (w/w): 0.666

Explanation:

The reaction of NaOH with acetic acid (CH₃COOH) is:

NaOH + CH₃COOH → CH₃COO⁻Na⁺ + H₂O

<em>where 1 mole of NaOH reacts per mole of acetic acid producing 1 mole of water and 1 mole of sodium acetate.</em>

As 39.26mL ≡ 0.03926L of 0.1062M are required to titrate the solution of acetic acid. Moles are:

0.03926L × (0.1062mol / L) = 4.169x10⁻³ moles of NaOH. As 1 mole of NaOH reacts per mole of acetic acid:

4.169x10⁻³ moles of CH₃COOH.

Molarity is defined as ratio between moles of substance and volume of solution in liters. Thus, molarity of acetic acid solution is:

4.169x10⁻³ moles of CH₃COOH / 0.03754L = <em>0.111M</em>

<em></em>

As molar mass of acetic acid is 60g/mol, 4.169x10⁻³ moles weights:

4.169x10⁻³ moles × (60g / mol) = <em>0.2501 g of acetic acid</em>

Now, assuming density of solution as 1.00g/mL, 37.54mL weights <em>37.54g</em>.

Thus, percent by weight is:

0.2501g CH₃COOH / 37.54g × 100 = <em>0.666% (w/w)</em>

8 0
2 years ago
Many of the motions of tje solar system are regular and predictable, meaning they happen over and over in a pattern . Identify o
son4ous [18]
The orbits of the plants are fixed around the sun by the suns gravitational pull
6 0
3 years ago
Other questions:
  • How many moles of sodium metal are needed to make 3.6 moles of sodium chloride?
    12·1 answer
  • What is 2 million divided by 8
    11·2 answers
  • Which of the following is a cause of eutrophication of a lake?
    7·2 answers
  • Help with chemistry
    14·1 answer
  • A chemical reaction that is first order in X is observed to have a rate constant of 1.7 x 10–2s–1. If the initial concentration
    5·1 answer
  • (earth science not chem!!) What branch of Earth Science deals with stars and galaxies beyond Earth?
    12·2 answers
  • Which of the following chemical formulas would require a prefix when named?
    8·2 answers
  • 2Ag (s) + H2S(s) → Ag2S(s) + H2(g)
    9·1 answer
  • A sample of water has a mass of 100.0 g.
    8·1 answer
  • Suppose you've just heard an opera singer warm up her voice. Write your own science question about the sounds a singer makes.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!