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2 years ago

Heat is being removed from a substance, but its temperature does not change. What is

1 answer:

4 0

So its temperature will not rise, since kinetic energy of molecules remains the same. The quantity of heat absorbed or released when a substance changes its physical phase at constant temperature (e g. From solid to liquid at melting point or from liquid to gas at boiling point) is termed as its latent heat.

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How many pairs of homologous chromosomes are found in human body cells

suter [353]

There are 22 pairs of <span>homologous chromosomes are found in human body cells.</span>

3 0

3 years ago

Xavier and Ashaunda were at the beach on a nice warm and sunny weekend. They watched as puffy

ale4655 [162]

Answer:

Condensation

Explanation:

During condensation the water vapor in the air converts to liquid, this forms clouds.

You can also refer to the attached image for more validation.

4 0

2 years ago

.) Calculate the mass in grams of each of the following samples.

Alik [6]

12+12+6(1)+16 =46 46*.251 = 11.546 gram

4 0

3 years ago

Read 2 more answers

Carbon dioxide, when it is at -145 degreesC has a density of 2.54 g/L. What is the pressure in torr??

Black_prince [1.1K]

Answer: The pressure in torr is 461 torr

Explanation:

To calculate the relation of density and molar mass of a compound, we use the ideal gas equation:

PV=nRT

P = pressure

V = Volume

n = number of moles

R = gas constant = 0.0821 Latm/Kmol

T = temperature = $-145^0C=(273-145)K=128K$

Number of moles (n) can be written as:

$n=\frac{m}{M}$

where, m = given mass

M = molar mass = 44 g/mol

$PV=\frac{m}{M}RT\\\\PM=\frac{m}{V}RT$

where,

$\frac{m}{V}=d$

where d = density = 2.54 g/L

The relation becomes:

PM=dRT

$P=\frac{dRT}{M}$

$P=\frac{2.54\times 0.0821\times 128}{44}=0.607atm$

$P=461torr$ (760torr=1atm)

Thus the pressure in torr is 461 torr

5 0

3 years ago

It has been proposed that mitochondria and chloroplasts are modern descendants of early prokaryotic cells that began to reside a

slamgirl [31]

Answer:

mitochondria and chloroplasts both have prokaryotic ribososmes

Explanation:

Mitochondria and chloroplasts are the modern descendants of early prokaryotic cells. These lived in primitive cells and later developed into part of them.
This hypothesis is supported because both mitochondria and chloroplasts have their own primitive ribosomes. These two organs contain 70s ribosomes.

8 0

3 years ago