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3 years ago

Salt dissolves in water because salt is held together by:

1 answer:

mote1985 [20]3 years ago

7 0

Water can dissolve salt because the positive part ofwater molecules attracts the negative chloride ions and the negative part of water molecules attracts the positive sodium ions. The amount of a substance that candissolve in a liquid (at a particular temperature) is called the solubility of the substance.

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What is instantaneous acceleration?A. how fast a speed is changing at a specific instant B. how fast a velocity is changing at a

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3 years ago

A gas with a volume of 250 mL at a temperature of 293K is heated to 324K. What is the new volume of the gas?

Natalija [7]

Answer:

The new volume of the gas is 276.45 mL.

Explanation:

Charles's law indicates that for a given sum of gas at constant pressure, as the temperature increases, the volume of the gas increases, and as the temperature decreases, the volume of the gas decreases.

Charles's law is a law that mathematically says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:

$\frac{V}{T} =k$

Analyzing an initial state 1 and a final state 2, it is satisfied:

$\frac{V1}{T1} =\frac{V2}{T2}$

In this case:

V1= 250 mL
T1= 293 K
V2= ?
T2= 324 K

Replacing:

$\frac{250 mL}{293 K} =\frac{V2}{324 K}$

Solving:

$V2=324 K*\frac{250 mL}{293 K}$

V2= 276.45 mL

<em><u>The new volume of the gas is 276.45 mL.</u></em>

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3 years ago

Which of the following do plants gain from sunlight?

solmaris [256]

They gain energy , it also allows plants to create organic molecules that they use as fuel.

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3 years ago

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Gasoline has a density of 0.749 g/mL. There are 454 grams in a pound and 3.7854 litres in a gallon. How many pounds does 19.2 ga

alexgriva [62]

Answer:

119.9 pound

Explanation:

Given data:

Density of gasoline = 0.749 g/mL

Volume of gasoline = 19.2 gal (19.2× 37854 =72679.9 mL)

Mass = ?

Solution:

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Now we will put the values in formula:

d = m/v

0.749 g/mL = m/ 72679.9 mL

m = 54437.25 g

gram to gallon:

54437.25/ 454

m = 119.9 pound

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3 years ago

Fill in the blank questions usually require

TiliK225 [7]

The answer is a because a fill in the blank is always just one word

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3 years ago

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