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3 years ago

What is enthalpy in chemistry pls help

1 answer:

8 0

a thermodynamic quantity representing the unavailability of a system's thermal energy for conversion into mechanical work, often interpreted as the degree of disorder or randomness in the system.

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Convert 3.8 meters to cm

mixas84 [53]

3.8 Meters converts to 380 Centimeters.

6 0

3 years ago

What volume of a 1.5 M KOH solution is needed to provide 3.0 moles of KOH?

Brums [2.3K]

Answer:

Volume = 2.0 liter of 1.5 M solution of KOH

Explanation:

1) Data:

a) Solution: KOH

b) M = 1.5 M

c) n = 3.0 mol

d) V = ?

2) Formula:

Molarity is a unit of concentration, defined as number of moles of solute per liter of solution:

M = n / V in liter

3) Calculations:

Solve for n: M = n / V ⇒ V = n / M

Substitute values: V = 3.0 mol / 1.5 M = 2.0 liter

You must use 2 significant figures in your answer: 2.0 liter.

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3 years ago

The atmosphere we live in is about 5-9 miles thick, depending on where you are on Earth. It is a mixture of 78% nitrogen, 21% ox

vova2212 [387]

Answerino by Duderino:

The troposphere

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3 years ago

Think about your morning from when you wake up until you arrive at school. Describe the forms of energy you encounter or use dur

denis-greek [22]

Answer:

When sleeping the energy exhibited is Potential energy. When I wake up and I’m preparing for the day I use kinetic energy which is the energy exhibited during motion.

Eating before leaving the house means I used chemical energy for replenishment of nutrients to aid the performance of more activities for the day. The food eaten and the physical activities also give rise to thermal energy which is why we sweat.

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3 years ago

Which of these statements is true ?

uysha [10]

Answer:

I believe it's C

Explanation:

KHDUDCM

King Henry Died Unexpectedly Drinking Chocolate Milk

cL is C and L is U so you go back two decimal points on 6000. That is 60 so you have 60 L and 6 L and 60L > 6L

7 0

3 years ago