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3 years ago

Which of these time measurements is the smallest?

Chemistry

2 answers:

TiliK225 [7]3 years ago

8 0

25,000 nanoseconds is the smallest time measurement

Anuta_ua [19.1K]3 years ago

7 0

Answer:

In order to answer the question, we convert the measurements given to a common base unit. For this case, we use seconds.

A) 0.02 seconds

B) 0.02 teraseconds x (10^12 s / 1 terasecond) = 2x10^10 seconds

C) 2,500 milliseconds x (1 s / 1000 ms) = 2.5 seconds

D) 25,000 nanoseconds x (1 x 10^-9 s / 1 nanosecond) = 2.5 x 10^-5 seconds

So ,The correct answer is option " D "

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What effect does increasing the concentration of a dissolved solute have on each of the colligative properties?

Igoryamba

Answer:

If we increase the concentration of a dissolved solute, the solution would have a vapor pressure so much low, the boiling temperature for the solution will be so high, freezing point for the solution will be so much low and the osmotic pressure will be higher.

Colligative properties always depends on dissolved particles (solute)

Explanation:

These are the colligative properties

- Vapor pressure lowering

ΔP = P° . Xm

Vapor pressure of pure solvent - Vapor pressure of solution.

If we add more solute, it would raise the Xm, so the solution would have a vapor pressure so much low.

Vapor pressure pure solvent - Vapor pressure solution ↑ = P° . Xm ↑

- Boiling point elevation

ΔT = Kb . m

When we add more solute, we are increasing the molality.

↑T° boiling of solution - T° boiling pure solvent = Kf . m ↑

Boiling temperature for the solution will be so high.

- Freezing point depression

When we add more solute, we are increasing the molality.

ΔT = Kf . m

T° fussion of pure solvent - ↓T° fussion of solution = Kf . m↑

Freezing point for the solution will be so much low.

- Osmotic pressure

π = M . R . T

When we add solute, molarity is increasing. Therefore the osmotic pressure will be higher.

π↑ = M↑ . R . T

7 0

4 years ago

Water can keep engines operating at low temperatures. Which property of water most likely gives it this ability?

AVprozaik [17]

Answer:

B: it has a high heat capacity

Explanation:

When any material has a high specific heat capacity/ heat capacity, it doesn't heat or cool very fast. So water can absorb more heat from the engine and can keep the engine cool or at low temperature for a longer period of time.

6 0

3 years ago

A 186 mL sample of a 0.275 M solution is left on a hot plate overnight. The following morning, the solution is 1.10 M. What volu

Flauer [41]

Answer:

139.5 mL.

Explanation:

To solve this question we will be making use of dilution law which is given by the equation below;

C1 × V1 = C2 × V2. Where C1 = the initial concentration, V1 = Initial volume, C2 = final concentration, V2 = Initial volume.

So, from the question we are given the following parameters; V1 = 186 mL, C1 = 0.275 M, C2 = 1.10 M and V2 = unknown (??).

Therefore, slotting in the above parameters into the dilution equation we have;

0.275 × 186= 1.10 × V2.

V2 = 0.275 × 186/ 1.10.

V2 = 46.5 mL.

The volume of solvent that has evaporated from the 0.275 M solution = 186 mL - 46.5 mL= 139.5 mL.

3 0

4 years ago

Read 2 more answers

6. The point on the surface of the Earth directly above the hypocenter of an earthquake. The hypocenter is the place where the r

meriva

Answer:

6. The point on the surface of the Earth directly above the hypocenter of an earthquake. The hypocenter is the place where the rupture of the plate boundary that led to the earthquake first happened.What point on the earth’s surface is directly above the focus?Epicenter

Explanation:

epicenter is the answer

5 0

3 years ago

I WILL GIVE YOU BRAINLYEST AND 100 POINTS PLSSSS HELP

shutvik [7]

Answer:

Each element has unique physical properties such as density, melting point, boiling point, etc. These properties can be used to identify an element using a reference book that contains such information about each element. Flame tests, atomic spectra, and spectroscopy can be used to identify some elements.

Explanation:

7 0

3 years ago