H2O has a mc021-1.jpgHvap = 40.7 kJ/mol. Solve for the quantity of heat released when 27.9 g of H2O condenses.A) 60.00 kJ
B) 61.05 kJ
C) 63.09 kJ
D) 68.60 kJ

Answers

Answer 1

Answer: The heat released for a certain mass of water that is condensing is calculated by multiplying the heat of vaporization and the amount of the substance. Calculation is as follows:

Heat released = (40.7 kJ/mol) (27.9 g) ( 1 mol / 18 g) = 63.09 kJ

Therefore, the correct answer from the choices listed above is option C.

Related Questions

Where in the Venn diagram would you place the term haploid?
Which is an example of hybridization that would increase hybrid vigor?
An error in which macromolecule is the cause of hemophilia
What advantages do embryonic stem cells have over over adult stem cells in medical research
name the four ways that a neurotransmitter leaves the synapse after being release by a pre-synaptic cell?

Which of the following is an example of an adaptation? A.Birds that live near a highway learn not to fly away every time a car passes.
B.The coloring of a monarch butterfly alerts predators to the fact that the butterfly is poisonous.
C.A dog sits when it hears a command because the owner rewards it with food.
D.Pigeons make their nests near an outdoor restaurant, where food is always available.

Answers

Answer:

Adaptation is spread through genes.

I would recommend the answer is B

Explanation:

apex

C, because he knows that if he behaves then he gets a treat so he's ADAPTING to the cause and effect:)

Manejas 87.5 millas a una rapidez de 35 millas ¿cuanto tiempo toma?

Answers

Para calcular el tiempo que toma manejar 87.5 millas a una velocidad de 35 millas por hora, puedes usar la fórmula:

Tiempo = Distancia / Velocidad

En este caso:

Tiempo = 87.5 millas / 35 millas por hora

Tiempo = 2.5 horas

Entonces, toma 2.5 horas para manejar 87.5 millas a una velocidad de 35 millas por hora.

Coral reefs are unaffected by pollution. Please select the best answer from the choices provideda. True
b. False

Answers

b. False

Coral reefs are dying In particular coral mining, agricultural and urban runoff, pollution, overfishing, etc.

The given statement is False.

Corals reefs are affected by the pollution. When sediments and the other pollutants enter the water, they smoother the coral reefs and they damage the coral reef and increases the growth of the damaging algae.

Pollution make the corals more susceptible to disease and can also alter their rate of reproduction.

Hardness is _____.-the way a mineral breaks under pressure
-the least informative property of a mineral
-measured using the Mohs scale
-the way a mineral splits when stressed

Answers

Answer: measured using the Mohs scale

Explanation:

Hardness is defined as ability of the surface to undergo resist deformation.

The degree of hardness is determined by observing the comparative ease or difficulty which which one mineral is scratched by another.

Color is the least informative property of a mineral.

Mohs scale of hardness gives a rating of 1 to talc which is categorized as most soft and rating of 10 to diamond which is categorized as most hard.

Hardness is the physical property of mineral measured using the Mohs scale. Hardness is property of mineral to resist scratch. On Mohs scale minerals are classified according to their hardness. Hardest mineral on the scale is Diamond. While the softest mineral is Talc. Different test are done to test the hardness of minerals. These includes, test of scratch from finger nail, test of scratch from knife/blade and test of mineral by a piece of glass. On Mohs scale minerals are classified according to their hardness:

10. Diamond

9. Corundum

8. Topaz

7. Quartz

6. Orthoclase

5. Apatite

4. Fluorite

3. Calcite

2. Gypsum

1. Talc

The area where rock layers first move along a fault is the _____ of an earthquake. epicenter focus seismology moment

Answers

the area where rock layers first move along a fault is the FOCUS of an earthquake.

Answer - foucus
..along a fault is the FOUCUS of an earthquake

During eukaryotic transcription,an RNA molecule is formed that is?A. complementary to both strands of DNA
B. identical to an entire single strand of DNA
C. double stranded and inside the nucleus
D. complamentary to part of one strand of DNA

Answers

During eukaryotic transcription, an RNA molecule is formed that is D. complementary to part of one strand of DNA. RNA is a single-stranded sequence of nucleotides. It is synthesized from a DNA sequence in the process of transcription. In transcription, only one strand of DNA is used as a template for the synthesis of RNA molecule using the rules of complementarity (adenine binds to thymine, cytosine binds to guanine).

Final answer:

During eukaryotic transcription, an RNA molecule is formed that is complementary to part of one strand of DNA.

Explanation:

During eukaryotic transcription, an RNA molecule is formed that is complementary to part of one strand of DNA. This RNA molecule, known as messenger RNA (mRNA), is transcribed from a specific gene and carries the genetic information from the DNA to the ribosome for protein synthesis. It is single-stranded and not double-stranded like DNA.