Chemistry

All new and solved questions in Chemistry category

4 answers

The specific heat of a certain type of metal is 0.128 J/(g⋅∘C). What is the final temperature if 305 J of heat is added to 74.1

The specific heat of a certain type of metal is 0.128 J/(g⋅∘C). What is the final temperature if 305 J of heat is added to 74.1 g of this metal, initially at 20.0 ∘C?...
10 answers

What are the similarities between DIFFUSION, FACILITATED DIFFUSION and OSMOSIS?

What are the similarities between DIFFUSION, FACILITATED DIFFUSION and OSMOSIS?...
4 answers

When 1761 J of heat energy is added to 46.6 g of hexane, C6H14, the temperature increases by 16.7 ∘C.Calculate the molar heat

When 1761 J of heat energy is added to 46.6 g of hexane, C6H14, the temperature increases by 16.7 ∘C. Calculate the molar heat capacity of C6H14....
4 answers

B. How much N2O5 would it take to form 1.0 mol of NO2?

B. How much N2O5 would it take to form 1.0 mol of NO2?...
4 answers

Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 9.50 MJ of

Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 9.50 MJ of energy in the form of heat if the temperature of the sodium is not to increase by more than 10.0 °C? Use P=30.8 J/(K⋅mol) for Na(l) at 500 K....
2 answers

Determine the number of atoms in 21.0 grams of sulfur, S. (The mass of one mole of sulfur is 32.07 g.)

Determine the number of atoms in 21.0 grams of sulfur, S. (The mass of one mole of sulfur is 32.07 g.)...
4 answers

If a system has 325 kcal of work done to it, and releases 5.00×102 kJ of heat into its surroundings, what is the change in internal

If a system has 325 kcal of work done to it, and releases 5.00×102 kJ of heat into its surroundings, what is the change in internal energy (Δ or Δ) of the system?...
3 answers

What are the shortcomings of a Daniel cell and how to overcome them

What are the shortcomings of a Daniel cell and how to overcome them...
9 answers

How do you balance the chemical equation Fe+O2 -->Fe₂O₃

How do you balance the chemical equation Fe+O2 -->Fe₂O₃...
2 answers

Can someone pls explain how I find the answers because my teacher didn’t explain it thoroughly.

Can someone pls explain how I find the answers because my teacher didn’t explain it thoroughly. [tex]Can someone pls explain how I find the answers because my teacher didn’t explain it thoroughly.[/tex]...
4 answers

Un bloque de osmio ocupa un volumen de 1535 cm3. ¿Cuánto pesaría el bloque?Si un objeto estuviera hecho de oro con una masa

Un bloque de osmio ocupa un volumen de 1535 cm3. ¿Cuánto pesaría el bloque? Si un objeto estuviera hecho de oro con una masa de 650g. ¿Cuánto volumen ocuparía?...
4 answers

The number of moles of aluminum oxide. Urgent Please.

The number of moles of aluminum oxide. Urgent Please. [tex]The number of moles of aluminum oxide. Urgent Please.[/tex]...
7 answers

6. What is the charge in coulombs on an electron? on a proton?

6. What is the charge in coulombs on an electron? on a proton?...
4 answers

Miscelaneous:7) What is the mass of 6.28 moles hydrogen chloride?

Miscelaneous: 7) What is the mass of 6.28 moles hydrogen chloride?...
4 answers

Help :( i don’t understand

Help :( i don’t understand [tex]Help :( i don’t understand[/tex]...
3 answers

Cs is in period 6. What does this tell you about Cs?

Cs is in period 6. What does this tell you about Cs?...
4 answers

Answer the following questions about the law of conservation of matter. (3 points)i. Briefly state what the law says. (1 point)ii.

Answer the following questions about the law of conservation of matter. (3 points) i. Briefly state what the law says. (1 point) ii. How could you state the law of conservation of matter differently, in terms of what happens during a chemical reaction? (1 point) iii. What changes can matter underg...
4 answers

A student measures the welght of a magnesiumblock to be 1.656g, but the manufacturer claimsthat it is 1.575g. What is the error

A student measures the welght of a magnesium block to be 1.656g, but the manufacturer claims that it is 1.575g. What is the error in the student's measurement? A B -0.081 +0.081 [tex]A student measures the welght of a magnesium block to be 1.656g, but the manufacturer claims that[/tex]...
3 answers

What is the approximate atomic mass of an isotope of lithium that has 3 electrons, 3 protons, and 5 neutrons?

What is the approximate atomic mass of an isotope of lithium that has 3 electrons, 3 protons, and 5 neutrons?...
4 answers

If you combine 270.0 mL of water at 25.00 ∘C and 100.0 mL of water at 95.00 ∘C, what is the final temperature of the mixture?

If you combine 270.0 mL of water at 25.00 ∘C and 100.0 mL of water at 95.00 ∘C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water....

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