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
Gennadij [26K]
3 years ago
9

How much ethylene glycol (C2H6O2, the major component of antifreeze) must be added to 1 L of water to keep it from freezing at -

20 oC?
Kf = 1.86 oC/m.
Chemistry
1 answer:
Pani-rosa [81]3 years ago
5 0
Colligative properties calculations are used for this type of problem. Calculations are as follows:<span>

</span><span>ΔT(freezing point)  = -(Kf)m
</span>-20.0<span>  = -1.86 °C kg / mol (m)
m = 10.75 mol/kg
</span><span>
10.75 mol C2H6O2 / kg water ( 1 L water ) ( 1 kg/L ) (62.07 g/mol )= 667.25 g

Hope this answers the question. Have a nice day.

</span>
You might be interested in
PH3, explain why there is a partial positive on hydrogen and partial negative on phosphorus.
Paraphin [41]

Answer:

Phosphorus is more electronegative than hydrogen

Explanation:

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons towards itself thereby making a molecule to be polar. The Pauling scale is the most commonly used to measure electronegativity. Fluorine (the most electronegative element) is assigned a value of 4.0 on the Pauling's scale, and values range down to caesium and francium which are the least electronegative elements.

Electronegativity increases from left to right across the periodic table (across the period) hence, phosphorus is far more electronegative than hydrogen. Being more electronegative than hydrogen, phosphorus attracts the bonding electron pair of the P-H bond closer to itself than hydrogen. Since the electrons of the bond are closer to phosphorus than hydrogen, the phosphorus atom acquires a partial negative charge while the hydrogen atom acquires a partial positive charge.

3 0
3 years ago
In a plant, roots absorb water and nutrients. Those materials are then transported to other parts of the plant. Which statements
ankoles [38]
I would say A and C. The circulatory system moves blood and nutrients similar to the plant moving water and nutrients. The endocrine system is responsible for hormones, glands and other such functions.
3 0
3 years ago
Read 2 more answers
What are the common units for expressing solution concentration?
Ira Lisetskai [31]
It would be mol/dm^3 Formula of concentration: (no. of moles/volume of solution in dm^3) 1 cm^3 = 0.001dm^3 Hope this helped. :)
6 0
3 years ago
Read 2 more answers
Molecule contains carbon, hydrogen and sulfur atoms. When a sample of 0.535g of this compound is burnt in oxygen, 1.119 g of CO2
OLga [1]

Answer:

The empirical formula is, C4H4S

Explanation:

Number of moles of carbon = 1.119 g/ 44g/mol = 0.025 moles

Mass of Carbon= 0.025 moles × 12 g/ mole = 0.3 g

Number of moles of hydrogen = 0.229/18g/mol × 2 = 0.025 moles

Mass of hydrogen = 0.025 moles × 1 = 0.025 g

Number of moles of sulphur = 0.407g/ 64 g/mol = 0.0064 moles

Mass of sulphur= 0.0064 moles ×32 = 0.2 g

Now we obtain the mole ratios by dividing through by the lowest ratio.

C- 0.025 moles/ 0.0064 moles, H- 0.025 moles/ 0.0064 moles, S- 0.0064 moles/0.0064 moles

C4H4S

4 0
3 years ago
UGRENT! Please help showing all work
Bess [88]

Answer:

wait I AM TRYING..................

this is limiting reactant

6 0
3 years ago
Other questions:
  • Potatoes can be peeled commercially by soaking them in a 3M to 6M solution of sodium hydroxide, then removing the skins by spray
    8·1 answer
  • What kind of observations can indicate a transfer of energy has taken<br> place in a reaction?
    7·1 answer
  • What is the source of heat for the Earth? *<br> ozone<br> wind<br><br> sun<br><br><br> water
    10·2 answers
  • An element's identity can be determined from its
    10·1 answer
  • Hi guys and I’m sry I haven’t been on and I am going be on for an hour getting help on my school work
    6·1 answer
  • The moon appears larger than most of the planets in our solar system because ______?
    13·2 answers
  • Is CuS an ionic, non polar or polar covalent bond and why
    7·2 answers
  • 150 grams of borax needs to be dissolved in water. Even after the solution is stirred, some borax remains visible in the water.
    11·1 answer
  • How do cancer cells differ from normal cells? Select all that apply.
    5·1 answer
  • Please help me solve this
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!