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
Alecsey [184]
3 years ago
13

PLEASE HELP!! What is the percentage by mass of solution formed by dissolving 27.0 grams of HCl in 102.0 grams of water? 26.5% 2

0.9% 18.2% 16.7%
Chemistry
1 answer:
densk [106]3 years ago
7 0

The answer is 20.9%; you have to divide the solute by the total number of grams; thus divide 27/129 and get B)20.9%

You might be interested in
In the chemical reaction C + H20 = CO + H2, what are the
drek231 [11]
B , your products are on the right side of the reaction. The reactants are on the left side
7 0
3 years ago
Which of the following is a balanced chemical equation? A, H2O2 → H2O + O2
LenKa [72]
I believe it's D! Hope you can help with my question!
3 0
3 years ago
Calculate the freezing point of a 0.08500 m aqueous solution of nano3. the molal freezing-point-depression constant of water is
Citrus2011 [14]
Depression in freezing point (ΔT_{f}) = K_{f}×m×i,
where, K_{f} = cryoscopic constant = 1.86^{0} C/m,
m= molality of solution = 0.0085 m
i = van't Hoff factor = 2 (For NaNO_{3})

Thus, (ΔT_{f}) = 1.86 X 0.0085 X 2 = 0.03162^{0}C

Now, (ΔT_{f}) = T^{0} - T
Here, T = freezing point of solution
T^{0} = freezing point of solvent = 0^{0}C
Thus, T = T^{0} - (ΔT_{f}) = -0.03162^{0}C
8 0
3 years ago
Read 2 more answers
How many electrons does oxygen have in its outer shell?
Ne4ueva [31]
6 . 2 in its inner shell & the remaining 6 in its outer shell.
7 0
3 years ago
Consider the data presented below. time (s) 0 40 80 120 160 moles of a 0.100 0.067 0.045 0.030 0.020 part a part complete determ
Whitepunk [10]
To determine which order of the reaction it is, first we need to calculate the rate of change of moles.
the data is as follows 
time         0         40        80       120       160
moles    0.100   0.067  0.045    0.030    0.020


Q1)
for the first 40 s change of moles ;
      = -d[A] / t
      = - (0.067-0.100)/40s
      = 8.25 x 10⁻⁴ mol/s
for the next 40 s
      = -(0.045-0.067)/40
      = 5.5 x 10⁻⁴ mol/s
the 40 s after that
      = -(0.030-0.045)/40 s 
     = 3.75 x 10⁻⁴ mol/s
k - rate constant
and A is the only reactant that affects the rate of the reaction

rate = k [A]ᵇ
8.25 × 10⁻⁴ mol/s = k [0.100 mol]ᵇ ----1
5.5 x 10⁻⁴ mol/s = k [0.067 mol]ᵇ   -----2
divide the 2nd equation by the 1st equation
1.5 = [1.49]ᵇ
b is almost equal to 1
Therefore this is a first order reaction

Q2)
to find out the rate constant(k), we have to first state the equation for a first order reaction.
rate = k[A]ᵇ
As A is the only reactant thats considered for the rate equation. 
Since this is a first order reaction,
b = 1
therefore the reaction is 
rate = k[A]
substituting the values,
8.25 x 10⁻⁴ mol/s = k [0.100 mol]
k = 8.25 x 10⁻⁴ mol/s /0.100mol
   = 8.25 x 10⁻³ s⁻¹

7 0
3 years ago
Other questions:
  • Consider the following intermediate chemical equations. When you form the final chemical equation, what should you do with CO? C
    10·1 answer
  • What is essential to living things because many of the chemical reactions that occur in living things require it?
    6·2 answers
  • For the reaction H2SO4 + 2Na2OH4 —> Na2SO4 + 2H2O
    14·1 answer
  • Calculate the molarity of the two solutions.
    15·1 answer
  • Exchanging ideas about science is called ______?
    9·1 answer
  • Which of the following is TRUE about ideal gas particles?
    10·1 answer
  • What happens when you mix baking powder baking soda and hydrogen peroxide together?
    13·1 answer
  • How many calories are released when 100.00 g of steam condenses?
    6·2 answers
  • What is bond stability??​
    12·2 answers
  • What volume of a 0.252 M hydroiodic acid solution is required to neutralize 18.0 mL of a 0.151 M barium hydroxide solution
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!