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3 years ago

As temperature increases, density increases. True or False

2 answers:

7 0

If the temperature of a chemical increases than the density increases because the rise of temperature expands the chemical which increases the density.

Alex73 [517]3 years ago

4 0

Density increases with the temperature, true.

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A 3L sample of an ideal gas at 178 K has a pressure of 0.3 atm. Assuming that the volume is constant, what is the approximate pr

harina [27]

Answer: The approximate pressure of the gas after it is heated to 278 K is 0.468 atm.

Explanation:

Given: $T_{1}$ = 178 K, $P_{1}$ = 0.3 atm

$T_{2}$ = 278 K, $P_{2}$ = ?

According to Gay Lussac law, at constant volume the pressure of a gas is directly proportional to the temperature.

Formula used to calculate the pressure is as follows.

$\frac{P_{1}}{T_{1}} = \frac{P_{2}}{T_{2}}\\$

Substitute the values into above formula is as follows.

$\frac{P_{1}}{T_{1}} = \frac{P_{2}}{T_{2}}\\\frac{0.3 atm}{178 K} = \frac{P_{2}}{278 K}\\P_{2} = 0.468 atm$

Thus, we can conclude that the approximate pressure of the gas after it is heated to 278 K is 0.468 atm.

3 0

3 years ago

A red blood cell is placed into each of the following solutions. Indicate whether crenation, hemolysis, or neither will occur.

krok68 [10]

Answer:

Following are the responses to the given choices:

Explanation:

The RBC crenation is implied through NaCl by 2,67 percent(m/v) because that solution becomes hypertonic to RBC because of the water within the RBC that passes externally towards the outskirts. RBC thus shrinks.
1.13% (m/v), because the low concentration or osmotic that all this solution shows is hypotonic regarding RBC because of the water which has reached the resulting swelling in RBC.
Distilled H2 implies hemolytic distillation.
Glucose is indicated by crenation at 8.69 percent (m/v).
5.0% (m/v) glucose and 0.9% (m/v) (Crenation is indicated by NaCl.v)

3 0

3 years ago

In a longitudinal wave, the _________ is the distance from one compression to the next compression or from one rarefaction to th

Andreyy89

The me drained is it

4 0

3 years ago

Which of these pairs of elements have the same number of valence electrons?

ElenaW [278]

The correct answer is the second option; sodium (Na) and potassium (K.)
Both sodium and potassium have the same number of valence electrons.

6 0

3 years ago

Why is potassium placed in the periodic table where it is?

Virty [35]

Potassium is placed where it is based on its properties and it's reactivity. It's also placed there based on it's atomic number.

6 0

3 years ago