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
ELEN [110]
2 years ago
5

A 9.86 g sample of an aqueous solution of hydroiodic acid contains an unknown amount of the acid. If 27.5 mL of 0.337 M potassiu

m hydroxide are required to neutralize the hydroiodic acid, what is the percent by mass of hydroiodic acid in the mixture?
% by mass​
Chemistry
1 answer:
Aneli [31]2 years ago
7 0

Answer:

88.3% of hydroiodic acid is found

You might be interested in
Heptane, pentane and octane are accidentally mixed. They all have different boiling points. Pentane boils at 360 ° C, hexane boi
Softa [21]

Answer:

Fractional distillation

Explanation:

Heat the mixture upto 700°C

The compuond with low boiling point will evaporate first and the compound with higher boiling point will evaporate last.

7 0
2 years ago
Consider the combustion of octane (C8H18)
Masja [62]
First, you have to find now many moles of octane are present in 191.6g of octane.  To do this you need to do this you need to divide 191.6g by its molar mass (which is 114g/mol).  This will give you 1.681 moles of octane.  Then you need to use the fact that 2 moles of octane are us ed to make 16 moles of carbon dioxide to find how many moles of carbon dioxide 1.681mole of octane produces. To do this you need to multiply 1.681mole by 16/2 to get 13.45mol carbon dioxide.  The final step is to find the number of grams presswnt in 13.446 moles of carbon dioxide.  To do this you need to multiply 13.446 mole by carbon dioxides molar mass (which is 44g/mol) to get 591.6 g of carbon dioxide.
Therefore, 591.6g of carbon dioxide is produced when 191.6 grams of octane is burned.

I hope this helps. Let me know in the comments if anything is unclear.
8 0
3 years ago
The total momentum of a group of objects remains________ unless outside forces act on the group.
damaskus [11]

Answer:

<em><u>constant</u></em>

Explanation:

In consideration of the conservation principle of linear momentum

8 0
2 years ago
Vectors are arrows that tell us two things about force...WEIGHT and DIRECTION
lorasvet [3.4K]
False, from what i know vectors tell us about direction and magnitude. not weight and direction
6 0
2 years ago
Read 2 more answers
⦁answer Calculate the density in g/L of 478 mL of krypton at 47° C and 671 mm Hg. ⦁ Determine the molar mass of a gas that has a
STALIN [3.7K]

Answer:

The correct answers are:

- Krypton: density= 2.8 g/L

- Molar Mass= 63.99 g/mol

- Mass of O₂= 15.29 g

Explanation:

The general equation of an ideal gas is the folllowing:

P x V = n x R x T

Where: P= pressure (in atm), V= volume; n= number of moles, R= gas constant (0,082 L.atm/K.mol) and T= temperature (in K).

<u>For krypton</u>:

P= 671 mmHg = 0,882 atm

V= 478 ml x 1000 ml/1 L= 0,478 L

T= 47ºC= 320 K

MM= 83.8 g/mol (from Periodic Table, Kr is an inert gas so it is a monoatomic gas)

P x V = n x R x T

Since the number of moles of a compound can be calculated by dividing the mass of compound (m) into its molar mass (MM):

n= m/MM

We can replace the expression in the first equation to obtain:

P x V= \frac{m}{MM} x R x T

m/V= \frac{P x MM}{R x T}

Density (d) is equal to the mass per volume (m/V), so we can directly calculate the density:

d= m/V= \frac{P x MM}{R x T}=

           = (0.882 atm x 83.8 g/mol)/(0.082 L.atm/K.mol x 320 K)

           = 2.81 g/L

<u>For the gas:</u>

d= 2.18 g/L

T= 66ºC= 339 K

P= 720 mmHg= 0.947 atm

d= \frac{P x MM}{R x T}

⇒MM = \frac{dx R x T}{P}

         = (2.18 g/L x 0.082 L.atm/K.mol x 339 K)/(0.947 atm)

         = 63.99 g/mol ≅ 64 g/mol

<u>For the O₂</u>:

V= 5.60 L

P= 1.75 atm

T= 250 K

MM(O₂) = 2 x Atomic Mass O= 2 x 16 g/mol= 32 g/mol

We can use the second equation:

P x V= \frac{m}{MM} x R x T

⇒  m = \frac{P x V x MM}{R x T}= (1.75 atm x 5.6 L x 32 g/mol)/(0.082 L.atm/K.mol x 250 K)

                         = 15.29 g≅ 16 g

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is a solution? Dirt An alloy Wood Plastic
    15·2 answers
  • Why are tadpoles susceptible to disease during metamorphasis
    6·2 answers
  • PLEASE ANSWER
    7·1 answer
  • The reaction 2Fe + 3Br2 ———&gt; 2FeBr3 is an example of which type of reaction
    10·1 answer
  • The proposed mechanism for a reaction is: Step 1: A + B X (fast) Step 2: X + C Y (slow) Step 3: Y D (fast) What is the overall r
    13·1 answer
  • In the food web below, what is one example of an omnivore?
    8·2 answers
  • Which statements accurately describe volume? Check all that apply.
    12·2 answers
  • If Dave ran 40,000 yards how many meters did he run? Dimensional Analysis
    15·1 answer
  • Toluene (C7H8) burns in oxygen to produce cardon dioxide and water. (a) How many grams of oxygen are neccessary for the combusti
    13·1 answer
  • 25. 22 the reaction of phenylmagnesium bromide with methyl benzoate followed by acidification produces triphenylcarbinol. what a
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!