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Nezavi [6.7K]
3 years ago
11

PLEASE I NEED HELP I WILL GIVE YOU BRAINLIST

Chemistry
1 answer:
puteri [66]3 years ago
8 0

Answer:

First Q :B

Second Q:C

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The actual yield of a product in a reaction was measured as 1.20 g. If the theoretical yield of the product for the reaction is
Nimfa-mama [501]

Answer:

The answer to your question is letter A. 65.9%

Explanation:

Data

actual yield = 1.20 g

theoretical yield = 1.82 g

Formula

percentage yield = \frac{actual yield}{theoretical yield} x 100

Substitution

percentage yield = \frac{1.20}{1.82} x 100

Simplification and result

percentage yield = 0.6593 x 100

percentage yield = 65.9 %

7 0
4 years ago
Waves in the ocean are 6m apart and pass a surfer every 2 s. what is the wave speed​
Nataly_w [17]
  • Distance=6m
  • Time=2s

\\ \tt\hookrightarrow Speed=\dfrac{Distance}{Time}

\\ \tt\hookrightarrow Speed=\dfrac{6}{2}

\\ \tt\hookrightarrow Speed=3m/s

8 0
2 years ago
Read 2 more answers
Predict the sign of ΔS for each process:(c) Cl₂(g) (100°C and 1 atm) → Cl₂(g) (10°C and 1 atm)
dexar [7]

The entropy for the process:

Cu(s) (350°C and 2.5 atm) → Cu(s) (450°C and 2.5 atm) decreases. The sign of entropy is negative.

<h3>What is Entropy? </h3>

Entropy is defined as the measure of the thermal energy of a system per unit temperature which is unavailable for doing useful work. As the work is obtained from ordered molecular motion, therefore the amount of entropy is also gives a measure of the molecular disorder, or randomness, of a system.

<h3>Effect of Temperature</h3>

There is increase in the Entropy as temperature increases. An increase in the temperature results that particles of substance have greater kinetic energy. The fast moving particles have more disorder than particles which are moving slowly at the given lower temperature.

<h3>Effect of Pressure</h3>

The entropy increases with increases in the pressure on the substance.

Since the temperature of given reaction decreases. So, entropy also decreases.

Thus, we concluded that the entropy for the process:

Cu(s) (350°C and 2.5 atm) → Cu(s) (450°C and 2.5 atm) decreases. So, the sign of entropy is negative.

learn more about Entropy:

brainly.com/question/14131507

#SPJ4

7 0
2 years ago
Do different paper towels have various types of adhesion <br> to water
yawa3891 [41]

Yes, depending on the thickness.

7 0
3 years ago
What mass of sodium hydroxide is needed to neutralise 24.5kg of sulfuric acid <br> H2SO4 + N2 = 2NH3
sveticcg [70]

Answer:

23.92 g

Explanation:

Molar mass of H2SO4 = (2×1)+32+(16×4)= 2+32+48= 82g/mol

H2SO4 + 2NaOH ---> Na2SO4 + 2H2O

I mole of H2SO4 = 2 moles of NaOH

24.5/82 = 24.5/82 × 2

= 0.598 moles of NaOH will neutralize

Mass= mole× molar mass

Molar mass of NaOH= 23+16+1 = 40g/mol

Mass= 0.598 × 40 = 23.92g of NaOH

7 0
3 years ago
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