3 ways to use electric current

Choose the aqueous solution that has the highest boiling point.These are all solutions of nonvolatile solutes and you shouldassu

lesya [120]

Answer: The correct answer is Option b.

Explanation:

The expression of elevation in boiling point is given as:

$\Delta T_b=i\times k_b\times m$

where,

$\Delta T_b$ = Elevation in boiling point

i = Van't Hoff factor

$T_b$ = change in boiling point

$k_b$ = boiling point constant

m = molality

For the given options:

Option 1: 0.100 m $NaNO_3$

Value of i = 2

So, molal concentration will be = $(0.100)\times 2=0.200m$

Option 2: 0.100 m $Li_2SO_4$

Value of i = 3

So, molal concentration will be = $(0.100)\times 3=0.300m$

Option 3: 0.200 m $C_3H_8O_3$

Value of i = 1 (for non-electrolytes)

So, molal concentration will be = $(0.200)\times 1=0.200m$

Option 4: 0.060 m $Na_3PO_4$

Value of i = 4

So, molal concentration will be = $(0.060)\times 4=0.24m$

As, the molal concentration of $Li_2SO_4$ is the highest, so its boiling point will be the highest.

Thus, the order of increasing boiling points follows:

$NaNO_3=C_3H_8O_3$

Hence, the correct answer is Option b.

4 0

3 years ago

The formula for bismuth(III) arsenide is..?

vlabodo [156]

Answer:

BiAs

Explanation:

6 0

3 years ago

What is the job of an environmental engineer?

xz_007 [3.2K]

Answer:

To keep the evinermental machinces working

Explanation:

6 0

3 years ago

What is the value of work done on an object when a 50–newton force moves it 15 meters in the same direction as the force?

victus00 [196]

Answer:

work done = 750 J

Explanation:

Given data:

Force on object = 50 N

Distance covered = 15 m

Work done = ?

Solution:

W = F. d

W = work done

F = force

d = distance

Now we will put the values in formula.

W = 50 N × 15 m

W = 750 N. m = 750 J

7 0

3 years ago

There are two isotopes of an unknown element, X-19 and X-21. The abundance of X-19 is 14.55%. A weighted average uses the percen

alekssr [168]

Answer:

2.765amu is the contribution of the X-19 isotope to the weighted average

Explanation:

The average molar mass is defined as the sum of the molar mass of each isotope times its abundance. For the unknown element X that has 2 isotopes the weighted average is defined as:

X = Mass X-19 * Abundance X-19 + MassX-21 * Abundance X-21

The contribution of the X-19 isotope is its mass (19.00 amu) times its abundance (14.55% = 0.1455). That is:

19.00amu * 0.1455 =

2.765amu is the contribution of the X-19 isotope to the weighted average

8 0

3 years ago