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3 years ago

Will mark Brainliest

Chemistry

2 answers:

Anastasy [175]3 years ago

6 0

Answer:

i think it might be b but im not 100% sure

Explanation:

Alex_Xolod [135]3 years ago

5 0

Answer:

B. The final temperatue is 200K, while pressure remains constant.

Explanation:

I took the test.

According to the ideal gas laws:

When volume increases, pressure decreases if temperature and number of moles is held constant.

When volume increases, temperature increases if pressure and number of moles is held constant.

In this case, the volume decreases from 3.0L to 2.0L. That means since the volume decreased, the temperature decreased if the pressure was held constant. OR Since the volume decreased, the pressure increased if the temperature was held constant.

Option A: The final pressure is 0.5 atm, while temperature is kept constant. This is wrong becuase the pressure decreased. Since the volume decreased, the pressure would have increased.
Option B: The final temperature is 200 K, while pressure remains constant. This is correct because the the volume decreased and so did the temperature.

Option C: The final pressure is 0.2 atm, while temperature is kept constant. This is wrong because the pressure decreased. Since the volume decreased, the pressure would have increased.
Option D: The final temperature is 350 K, while pressure remains constant. This is wrong because the temperature increased. Since the volume decreased, the temperature would have decreased.

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Na+CL2=2NACL is the balanced reaction for the formation of table salt. Given 20 grams of Na and 10 grams of Cl2, which reactant

Elina [12.6K]

Excess reactant : Na

NaCl produced : = 16.497 g

<h3>Further explanation</h3>

Given

Reaction(balanced)

2Na + Cl₂⇒ 2NaCl

20 g Na

10 g Cl₂

Required

Excess reactant

NaCl produced

Solution

mol Na(Ar = 23 g/mol) :

= 20 : 23 = 0.87

mol Cl₂(MW=71 g/mol):

= 10 : 71 g/mol = 0.141

mol : coefficient :

Na = 0.87 : 2 = 0.435

Cl₂ = 0.141 : 1 = 0.141

Limiting reactant : Cl₂(smaller ratio)

Excess reactant : Na

Mol NaCl based on mol Cl₂, so mol NaCl :

= 2/1 x mol Cl₂

= 2/1 x 0.141

= 0.282

Mass NaCl :

= 0.282 x 58.5 g/mol

= 16.497 g

4 0

3 years ago

A client comes to the emergency department with status asthmaticus. The client's respiratory rate is 48 breaths/minute, and the

11111nata11111 [884]

Answer:

The complete question is:

Question: What disorder is indicated by these findings? A client comes to the emergency department with status asthmaticus. His respiratory rate is 48 breaths/minute, and he is wheezing. An arterial blood gas analysis reveals a pH of 7.52, a partial pressure of arterial carbon dioxide (PaCO2) of 30 mm Hg, PaO2 of 70 mm Hg, and bicarbonate (HCO3−) of 26 mEq/L.

A. Metabolic acidosis

B. Respiratory acidosis

C. Metabolic alkalosis

D. Respiratory alkalosis

Answer: The correct answer is:

D. Respiratory alkalosis

Explanation:

In Respiratory alkalosis the Partial Pressure of Arterial Carbondioxide (PaCO2) become decreased (i.e. less than 35 mm Hg) and the pH of blood become increased (i.e. more than 7.45). Alveolar hyperventilation causes respiratory alkalosis.

Alveolar hyperventilation occurs when alveolar ventilation is increased than the arterial carbondioxide tension and carbondioxide production.

Alveolar ventilation is the gaseous exchange between alveoli and the external environment.

Whereas, in metabolic acidosis, bicarbonate (HCO3) become decreased (i.e. less than 22 mEq/l and the pH of blood become decreased (i.e. less than 7.35); in respiratory acidosis, the pH of blood also become decreased (i.e. less than 7.35) and the PaCO2 become increased (i.e. more than 45 mm Hg); and in metabolic alkalosis, the bicarbonate (HCO3) become increased (i.e. more than 26 mEq/l and the pH become increased (i.e. more than 7.45).

4 0

3 years ago

What is the Molarity of a solution with 1.8 mil KCl dissolved to a volume of 1.5L

vova2212 [387]

Answer:1.2M

Explanation:

Molarity=number of moles ➗ volume in liters

Molarity=1.8 ➗ 1.5

Molarity=1.2M

8 0

3 years ago

What is mass in science?

Musya8 [376]

Its like weight but not. mass is the amount of matter in a substance.

6 0

3 years ago

Read 2 more answers

A sample of quartz, which has a specific heat capacity of , is dropped into an insulated container containing of water at and a

klasskru [66]

This question is incomplete, the complete question is;

A 17.0 g sample of quartz, which has a specific heat capacity of 0.730 J.g⁻¹°C⁻¹, is dropped into an insulated container containing 200.0 g of water at 85°C and a constant pressure of 1 atm . The initial temperature of the quartz is 7.2°C.

Assuming no heat is absorbed from or by the container, or the surroundings, calculate the equilibrium temperature of the water. Be sure your answer has the correct 3 number of significant digits.

Answer:

the equilibrium temperature of the water is 83.9°C

Explanation:

Given the data in the question;

Since no heat is absorbed from or by the container, or the surroundings;

Then Heat lost by the quartz = heat gained by water

ΔH1 = ΔH2

DH = mcΔT

where m is mass, C is specific heat capacity and ΔT is temperature change;

(mcΔT)1 = (mcΔT)2

we know that; specific heat capacity of is 4200 Joule/Kilogram K (J/kg∙K) = 4.2 (J/g∙°C)

we substitute

17.0g × 0.730 J.g⁻¹°C⁻¹ × ( 7.2°C - T2) = 200.0g × 4.2 J/g∙°C × ( T2 - 85°C)

89.352 - 12.41T2 = 840T2 - 71400

840T2 + 12.41T2 = 89.352 + 71400

852.41T2 = 71489.35

T2 = 71489.35 / 852.41 = 83.86°C ≈ 83.9°C

Therefore, the equilibrium temperature of the water is 83.9°C

3 0

3 years ago