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
Natasha_Volkova [10]
3 years ago
7

Determine the mole fraction of the solute if you have 3.4 grams KCl in 8.1 grams H2O

Chemistry
2 answers:
Yakvenalex [24]3 years ago
6 0
.42; 3.4 divided by 8.1 is about .42
Snowcat [4.5K]3 years ago
6 0
The answer to this question would be A 0.092
You might be interested in
Group I elements are metals with ................. density
kherson [118]

group 1 elements are metals with<u> low</u> density

8 0
3 years ago
A 32.5 g iron rod, initially at 22.4 ∘C, is submerged into an unknown mass of water at 63.0 ∘C, in an insulated container. The f
a_sh-v [17]

Answer:

m_{H_2O}=39.0g

Explanation:

Hello,

In this case, is possible to infer that the thermal equilibrium is governed by the following relationship:

\Delta H_{iron}=-\Delta H_{H_2O}\\m_{iron}Cp_{iron}(T_{eq}-T_{iron})=-m_{H_2O}Cp_{H_2O}(T_{eq}-T_{H_2O})

Thus, both iron's and water's heat capacities are: 0.444 and 4.18 J/g°C respectively, so one solves for the mass of water as shown below:

m_{H_2O}=\frac{m_{iron}Cp_{iron}(T_{eq}-T_{iron})}{-Cp_{H_2O}(T_{eq}-T_{H_2O}} \\\\m_{H_2O}=\frac{32.5g*0.444\frac{J}{g^0C}*(59.7-22.4)^0C}{-4.18\frac{J}{g^0C}*(59.7-63.0)^0C} \\\\m_{H_2O}=39.0g

Best regards.

8 0
3 years ago
Select the ion.<br><br>1)Cu<br>2)PO4-3<br>3)SO2
Lilit [14]
I believe the answer is B. PO4-3
6 0
3 years ago
Read 2 more answers
Which class of compounds contains only carbon, hydrogen, and nitrogen?
Likurg_2 [28]
<h2>Answer: </h2>

Nitrogen forms many thousands of organic compounds. Most of the known varieties may be regarded as derived from ammonia, hydrogen cyanide, cyanogen, and nitrous or nitric acid. The amines, amino acids, and amides, for example, are derived from or closely related to ammonia.

<h3>Explanation: </h3>

A carbohydrate has only Carbon, Hydrogen and Oxygen, with the hydrogen and oxygen in the ratio 2:1.

Examples are glucose C6H12O6 and table sugar C12H22O11

A protein is made of amino acids. Amino acids have an amino group which is −NH2.  

So without nitrogen atoms the compound cannot be a protein.

Nucleic acids are organic compounds that contain carbon, hydrogen, nitrogen but they also contains phosphorus and oxygen. They are made of smaller units called nucleotides.

So;

Simple Amines are the class of organic compounds that only contains Carbon, Hydrogen and Nitrogen.


5 0
3 years ago
Read 2 more answers
Is it small intestine or Stomach or Rectum or Bladder
Pavel [41]

Answer: C. Rectum

Explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • What is 15.0m= mm This is for metric conversions
    6·1 answer
  • Which is an acceptable Lewis structure for a diatomic nitrogen molecule?
    15·2 answers
  • Enter an equation for the precipitation reaction that occurs (if any) when solutions of potassium hydroxide and nickel(ii) bromi
    15·2 answers
  • During nuclear fusion on a protostar, ___ fuse to form helium atoms
    14·1 answer
  • How many 2º alkyl bromides, neglecting stereoisomers, exist with the formula c6h13br?
    12·1 answer
  • Bohr model with hydrogen. helpp
    14·1 answer
  • The language of science is _____?
    11·2 answers
  • Is another way in which nitrogen gets fixed in the soil​
    12·1 answer
  • How many molecules is 6.11 moles of Zn?
    14·1 answer
  • find the weight of the same object on a planet where the gravitational attraction has been reduced to 1/10 of the earth pull sho
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!