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2 years ago

Why can't liquids change volume but gasses can?

2 answers:

5 0

Gases don't have a definite shape or volume and fill any container. and since the particles are far apart from each other their attraction is weak. since there is a lots of free space between particles, gases can easily be compressed. water particles are held very close together by strong forces of attraction."Because the particles are close together, liquids can't easily be compressed and keep the same volume."

hope this helped

kupik [55]2 years ago

4 0

Because liquids cant be condensed the way that gasses can for example in a tank of argon you can put 20 cubic feet because it can be be condensed but you could not fit 20 cubic feet of water because it can not be packed together .

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What adaptations allow a camel and a cactus to survive in warm environments?

lesya [120]

Answer:

A camel stores fat in its hump, while the cactus stores water in its thick stem.

Explanation:

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2 years ago

Read 2 more answers

La formula quimica de la molecula de agua H20 , si H = 1 gramos y O = 16 gramos . Cual es su composicion porcentual ? 88,88 % de

vesna_86 [32]

Answer:

88,88 % de O y 11,11 % de H

Explanation:

La composición porcentual se define como la masa que hay de cada mol de átomo en 100g. Las moles de agua en 100g son:

Masa molar agua:

2H = 2*1g/mol = 2g/mol

1O = 1*16g/mol = 16g/mol

Masa molar = 2 + 16 = 18g/mol

100g H2O * (1mol / 18g) = 5.556 moles H2O.

Moles de hidrógeno:

5.556 moles H2O * (2mol H / 1mol H2O) = 11.11 moles H

Moles Oxígeno = Moles H2O = 5.556 moles

La masa de hidrógeno es:

11.11mol * (1g/mol) 11.11g H

La masa de oxígeno es:

5.556 mol * (16g / 1mol) = 88.89g O

Así, el porcentaje de O es 88.89% y el de H es 11.11%. La opción correcta es:

7 0

2 years ago

An AM station broadcasts at 1290 kHz. Calculate the wavelength of this radio frequency.

Dahasolnce [82]

Answer:

$Wavelength=232.56\ m$

Explanation:

The relation between frequency and wavelength is shown below as:

$c=frequency\times Wavelength$

c is the speed of light having value $3\times 10^8\ m/s$

Given, Frequency = 1290 kHz = $1290\times 10^{3}\ Hz$ (As 1 kHz = 1000 Hz )

Thus, Wavelength is:

$Wavelength=\frac{c}{Frequency}$

$Wavelength=\frac{3\times 10^8}{1290\times 10^{3}}\ m$

$Wavelength=232.56\ m$

4 0

2 years ago

A camcorder has a power rating of 17 watts. If the output voltage from its battery is 7 volts, what current does it use?

Salsk061 [2.6K]

Answer: The current use by the camcorder is of 2.42 amperes.

Explanation:

Power rating of the camcorder,P = 17 watt

The voltage from the battery,V = 7 volts

$Power=Voltage\times Current$

$17 watts=7 volts\times I$

$I=\frac{17 watts}{7 Volts}=2.42 Ampere$

The current use by the camcorder is of 2.42 Amperes.

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2 years ago

Which of the following factors affect the vapor pressure of a liquid? Check all that apply. View Available Hint(s) Check all tha

trasher [3.6K]

Answer:

Vapour pressure of liquid is affected by its TEMPERATURE, TYPE OF LIQUID, ADDITION OF SOLUTES.

Explanation:

Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid. Mathematically, the vapor pressure of liquid is written as:

In (Pvap) = -ΔHvap / R * (1/T) + C

ΔHvap is the enthalpy of vaporization and it is constant for specific liquid, T is the temperature and C is a constant. Temperature therefore affect the vapor pressure of a liquid as increase in temperature can cause an increase in vapor pressure.

The type of liquid also affect the vapor pressure. If the molecules bind to each other strongly in the liquid, it increases vapor pressure to be exerted by the liquid but if the type of liquid is one with weak forces of attraction, the vapor pressure is reduced.

Addition of solute to the liquid increases the boiling temperature of liquids thereby reducing it's vapor pressure.

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2 years ago