Calculate the mass in grams of 2.56x10 -3 mol of iron.

Answers

Answer 1

Answer:

Final answer:

The mass in grams of 2.56x10-3 mol of iron is 0.143 g.

Explanation:

To calculate the mass in grams of 2.56x10-3 mol of iron, you need to use the molar mass of iron. The molar mass of iron is 55.845 g/mol. To find the mass in grams, you can use the following step-by-step calculation:

Mass (g) = Number of moles x Molar mass

Mass (g) = 2.56x10-3 mol x 55.845 g/mol = 0.143 g

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At what temperature will the following reaction happen spontaneously, given that ΔH=8.91×103J and ΔS= –219.20 J/K? CaSO4(s) + 2HCl(g) → CaCl2(s) + H2SO4(l)A) at 298 K B) at 100 K C) It is spontaneous at any temperature. D) It is not spontaneous at any temperature.

Please help! I'd appreciate it a lot!

Answers

Answer:

6 is B, 7 is A

Explanation:

What are four physical properties of aluminum foil?

Answers

1) solid
2) ductile
3) malleable
4) silver in color

Malleable means that it is "flexible" or can be permanently reshaped easily. Ductile means that it can be drawn out into a wire. Aluminum foil's state of matter is solid, and it appears in a silver color.

Solid

Shiny

Dole

Conductor if electricity

Which term describes the point when two objects reach the same temperature and there is no longer a transfer of energy through heat?1. Latent Heat
2.specific Heat
3.thermal equilibrium
4.Heat of Fusion

Answers

Answer: Option (3) is the correct answer.

Explanation:

When two substances or objects at the same temperature do not exchange heat with each other then this state is known as thermal equilibrium.

Whereas latent heat is the release or absorption of energy at a constant temperature.

Specific heat is the amount of heat per unit mass necessary to increase the temperature by one degree Celsius.

Heat of fusion is the amount of energy required to change the state of matter or substance.

Thus, we can conclude that out of the given options, thermal equilibrium describes the point when two objects reach the same temperature and there is no longer a transfer of energy through heat.

C. Thermal Equilibrium

Plz I need help is the 2nd time I post this

Answers

Answer:

2--->C

6---->E

3---->D

4--->A

5--->B

1---->F

Explanation:

I think so, sorry if its wrong.

An atom of carbon-12 and an atom of carbon-14 differ in(1) atomic number(2) mass number(3) nuclear charge(4) number of electrons

Answers

Answer:

The correct answer is option (2).

Explanation:

Carbon-12:

Atomic Number = 6

Mass number = 12

Nuclear charge = number of protons = +6

Number of electrons = 6

Carbon-14:

Atomic Number = 6

Mass number = 14

Nuclear charge = number of protons = +6

Number of electrons = 6

An atom of carbon-12 and an atom of carbon-14 only differ in their mass number as C-12 has mass number of 12 and C-14 has mass number of 14.

(2) mass number
the number after the two carbons is the mass number, the two carbons are different isotopes of each other
isotopes have the same number of protons but different number of neutrons, neutrons and protons make up the atomic mass number, so if you add neutrons to the atom the mass number increases
i hope that makes sense!

List three organelles found in cells and describe their functions.

Answers

1. Nucleus: Contains genetic material, controls cell activities.

2. Mitochondria: Produces energy through cellular respiration.

3. Golgi apparatus: Modifies and packages proteins.

1. Nucleus: The nucleus controls the cell by storing DNA instructions. It affects cell growth, reproduction, and metabolism by regulating gene expression.

2. Mitochondria: Cellular respiration powers mitochondria. They convert foods into cell energy source ATP. Metabolism and cell signalling depend on mitochondria.

3. Golgi apparatus: It changes and packages endoplasmic reticulum proteins and lipids. Cisternae are stacked membranous sacs. The Golgi apparatus adds carbohydrates or lipids to proteins, organises them into vesicles, and guides them within or outside the cell. It is crucial for intracellular transport and secretion.

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nucleus: controls cell

cell membrane: controls what goes in and out of a cell

cytoplasm: where chemical reactions take place

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