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frez [133]
3 years ago
5

Four different solutions have the following boiling points. Which boiling point corresponds to a solution with the lowest freezi

ng point?
Chemistry
1 answer:
UNO [17]3 years ago
8 0
What are the temperatures?
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Which of the following statements about balanced chemical equations is true?
miv72 [106K]

Answer:

The correct answer is They provide the molar ratio of reactant and products in a chemical reaction.

Explanation:

Balanced chemical equation helps us to calculate the number of moles of both reactant and product.For example

    2H2+O2=2H2O

From the above balanced equation it can be stated that 2 molecules of hydrogen(H2) reacts with 1 molecule of oxygen(O2) to form 2  molecules of water.

       

3 0
3 years ago
Read 2 more answers
If you compare the egg to a cell, what did you learn about how water moves into or out of a cell? What about salt water? Why doe
Leto [7]

If we compare a cell with an egg there is a major difference between the outer membrane

in case of cell they are bounded by semi permeable membrane

The semi permeable membrane is a selectively permeable membrane which allows the movement of only solvent molecule and not solute molecules through it.

So water can move into or out of the cell through cell membrane by a special physical process known as osmosis.

the water will move from a low concentration gradient to high concentration gradient.

8 0
3 years ago
A unit of heat energy that was formerly used frequently was the calorie. Look up the definition of the calorie in your textbook
dybincka [34]

Answer and Explanation:

Calorie is the unit of heat energy . There are 2 units with the same name 'calorie' which is widely used.

'The amount of heat energy required to increase the temperature of 1 gram of water by mass by 1^{\circ}C or 1 K is known as small calorie or gram calorie'.

Another one is large calorie which can be defined as :

'The amount of heat energy required to make arise in temperature of water 1 kg by mass by 1^{\circ}C or 1 K is known as large calorie or  kilcalorie and is represented as Cal or kcal'.

After the adoption of SI system, thee units of the metric system cal, C or kilocal are considered deprecated or obsolete with the SI unit for heat energy as 'joule or J'

1 cal = 4.184 J

1C or 1 kilocal = 4184 J

Calorimeter constant:

Calorimeter constant, represented as 'C_{cal}' is used to quantify the heat capacity or the amount of heat of a calorimeter.

It can be calculated by ther given formula:

{\displaystyle C_{cal}}={\frac {\Delta {H}}{\Delta {T}}}}}

where,

{\Delta {T}} = corresponding temperature change

{\Delta {H} = enthalpy change

Its unit is J/K or J/1^{\circ}C[/tex] which can be convertyed to cal/1^{\circ}C[/tex] by dividing the calorimeter constant by 4.184 or 4184 accordingly.

8 0
3 years ago
Calculate the molar solubility of ca(io3)2 in each solution below. the ksp of calcium iodate is7.1 × 10−7.
e-lub [12.9K]
In order to find the answer, use an ICE chart:

Ca(IO3)2...Ca2+......IO3- 
<span>some.......0..........0 </span>
<span>less.......+x......+2x </span>
<span>less........x.........2x 
</span>
<span>Ca(IO₃)₂ ⇄ Ca⁺² + 2 IO⁻³
</span>
K sp = [Ca⁺²][IO₃⁻]²
K sp = (x) (2 x)² = 4 x³
7.1 x 10⁻⁷ = 4 x³
<span>x = molar solubility = 5.6 x 10</span>⁻³ M

The answer is 5.6 x 10 ^ 3 M. (molar solubility)
5 0
3 years ago
Read 2 more answers
4NH3(g)+5O2(g)⟶4NO(g)+6H2O(g) how many molecules of H2O can be formed from 6.12mol NH3?
stich3 [128]

Answer:

The answer to your question is 5.529 x 10²⁴ molecules of H₂O

Explanation:

                     4NH₃  + 5O₂   ⇒   4NO   +   6H₂O

                      6.12 mol                               ? molecules

Rule of three (proportions)

                     4 mol of NH₃  ------------------- 6 mol of H₂O

                     6.12 mol of NH₃  ---------------  x mol of H₂O

                     x = (6.12 x 6) / 4

                     x = 36.72 / 4

                     x = 9.18 mol of H₂O

                           

                     1 mol of H₂O ------------------ 6.023 x 10²³ molecules

                     9.18 mol of H₂O -------------   x

                     x = (9.18 x 6.023 x 10²³) / 1

                     x = 5.529 x 10²⁴ molecules

5 0
3 years ago
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