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
77julia77 [94]
3 years ago
14

Which is a polar molecule

Chemistry
2 answers:
NNADVOKAT [17]3 years ago
8 0
The correct answer is B i believe 
because a molecule is polar if it has H-F, H-O, or H-N. and many other reasons... B. is your answer
Nimfa-mama [501]3 years ago
5 0
I guess it c but im not to sure maybe it E
You might be interested in
At constant pressure, which of these systems do work on the surroundings? Check all that apply.
lana66690 [7]
I believe the correct answers from the choices listed above are the second and the last option. At constant pressure, the systems 2A(g) + B(g) ---> 4C(g)  and 2C(g) A(s) + B(s) ---> C(g) produces work to the surroundings. <span>When a gas is evolved during a chemical reaction, the gas can be imagined as displacing the atmosphere - pushing it back against the atmospheric pressure. The work done is therefore V*P where V is the volume of gas evolved, and P is the atmospheric pressure. </span>
6 0
3 years ago
The ____ causes currents in open water to move in a curved path rather than a straight path
alexdok [17]

coriolis effect is the answer

6 0
4 years ago
Determine the molarity and mole fraction of a 1.09 m solution of acetone (CH3COCH3) dissolved in ethanol (C2H5OH). (Density of a
Juli2301 [7.4K]

Answer:

Molarity = 0.809 M

mole fraction = 0.047

Explanation:

The complete question is

Calculate the molarity and mole fraction of acetone in a 1.09-molal solution of acetone (CH3COCH3) in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that the volumes of acetone and ethanol add.

Solution -

Solution for molarity:

1.09-molal means 1.09 moles of acetone in 1.00 kilogram of ethanol.

1)  

Mass of 1.09 mole of acetone

= 1.09  mol x 58.0794 g/mol = 63.306 g

Density of acetone = 0.788 g/cm3  

Thus, volume of 1.09 moles of acetone = 63.306 g/0.788 g/cm3 = 80.34 cm3

For ethanol

1000 g divided by 0.789 g/cm3 = 1267.427 cm3

Total volume of the solution = Volume of acetone + Volume of ethanol = 80.34 cm3 + 1267.427 cm3 = 1347.765 cm3  = 1.347 L

a) Molarity:

1.09 mol / 1.347 L = 0.809 M

Mole Fraction  

a) moles of ethanol:

1000 g / 46.0684 g/mol = 21.71 mol

b) moles of acetone:

1.09 / (1.09 + 21.71) = 0.047

3 0
3 years ago
Why do the 8 phases of the moon occur
nadya68 [22]
The phases of the moon occur because the moon orbits earth which causes the portion illuminated to change. The earth casts changing angles on the moon causing portions to be illuminated or dark.
4 0
4 years ago
Is electrolysis of water an example of a chemical reaction? Why or why not?
katen-ka-za [31]
Chemical reaction is any process that involves rearangent of the molecular or ionic structure of substances. each chemical reaction is characterised by an activation energy required for the reaction to occur ,for the change or rearrangement to take place
now fro combustion of fuel:we provide this energy by spark (heat pulse).now what about electrolysis?just the mode and manner of providing energy is different:instead of talking of activation energy,we talk of activation overpotential,both bring conceptually the same thing.heat energy is replaced by potential difference in rough terms.

so in short ,electrolysis is a chemical change ,just the mode of activation is different that thermally initiated chemical reactions
8 0
3 years ago
Other questions:
  • how many grams of oxygen gas are needed to produce 10.0 grams of carbon dioxide according to the balanced equation of CH4
    8·1 answer
  • Identify one type of noncovalent bond present in each solid.
    5·1 answer
  • As you increase elevation the atmospheric pressure decreases, which means the boiling point of water also decreases. In Denver,
    15·2 answers
  • The process of change in a population over time is called what?
    10·1 answer
  • Scientific theories are usually
    7·2 answers
  • What is the formula of Potassium hydroxide? What is it common name? Is it Alkali?​
    14·2 answers
  • Fractional distillation is used to separated
    6·1 answer
  • What does it mean to be limiting or excess? (Limiting Reactant)
    5·1 answer
  • The average temperature at the South Pole In January is - 35.4 °C.
    14·1 answer
  • How many formula units are present in 45g of NaHCO^3?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!