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3 years ago

Which is the best example of water regulating an organism’s body temperature?

Chemistry

1 answer:

nalin [4]3 years ago

8 0

<span>the best example is evaporation</span>

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Cyclohexane has a freezing point of 6.50 ∘C and a Kf of 20.0 ∘C/m. What is the freezing point of a solution made by dissolving 0

Elza [17]

Answer: $2.49^0C$

Explanation:

Depression in freezing point is:

$T_f^0-T_f=i\times k_f\times \frac{w_2\times 1000}{M_2\times w_1}$

where,

$T_f$ = freezing point of solution = ?

$T^o_f$ = freezing point of solvent (cyclohexane) = $6.50^oC$

$k_f$ = freezing point constant of solvent (cyclohexane) = $20.0^oC/m$

m = molality

i = Van't Hoff factor = 1 (for non-electrolyte)

$w_2$ = mass of solute (biphenyl) = 0.771 g

$w_1$ = mass of solvent (cyclohexane) = 25.0 g

$M_2$ = molar mass of solute (biphenyl) =

Now put all the given values in the above formula, we get:

$(6.50-T_f)^oC=1\times (20.0^oC/m)\times \frac{(0.771g)\times 1000}{154\times (25.0g)}$

$(6.50-T_f)^oC=4.01$

$T_f=2.49^0C$

Therefore, the freezing point of a solution made by dissolving 0.771 g of biphenyl in 25.0 g of cyclohexane is $2.49^0C$

4 0

3 years ago

One reaction that produces hydrogen gas can be represented by the unbalanced chemical equation Mg+HCl=MgCl2+H2. What mass of HCl

Delicious77 [7]

I the HCI is the mass of the equation but not always answer is Mg+HC H20

3 0

3 years ago

The Top Thrill Dragster, a rollercoaster at Cedar Point in Ohio, soars through the air at 176ft/sec. How fast is this in mph?

scoray [572]

Answer:

120mph

Explanation:

Google

divide the speed value by 1.467

176 times 60 second in a minute times 60 minutes in an hour

than divide by 5280 the amount of feet in a mile

7 0

2 years ago

To show the electron configuration for an atom, when would it be better to use an orbital notation than to use a written configu

Kisachek [45]

The answer is: when the aim is to show electron distributions in shells

An orbital notation is more appropriate if you want to show how the electrons of an atom are distributed in each subshell. This is because there are some atoms that have special electronic configurations that aren't obvious in just written configurations.

8 0

2 years ago

Read 2 more answers

Suggest a way of improving

bezimeni [28]

Explanation:

when water is boiling and when u cover it and increase the pressure it causes the increase in rate of condensation.

4 0

3 years ago