Chemistry College

The temperature of a sample of iron increased by 23.1 °C when 267 J of heat was applied. What is the mass of the sample?

Answers

Answer 1

Answer:

Explanation:

go answer my question pls

Answer 2

Q = mcΔt

c iron = 0.449 (from table)

m = Q/cΔt

m = 267 /(0.449 x 23.1)

m = 25.74 g

Related Questions

How many TOTAL atoms are contained in 10 molecules of TNT, C7H5N3O6?

Answers

Answer:7 atom of carbon+5atom of hydrogen +3atom of nitrogen +6 atom of oxygen =21

What are the correct coefficients in order for the equation to be balanced?

Answers

Answer:

F2: 1

NaBr: 2

NaF: 2

Br: 1

Explanation: Give like :(

If two boxes are pushed with the same amount of total force, one weighs 1kg & the other weights 100 kg, which box will accelerate faster

Answers

Answer:1kg box because the smaller the mass, the greater the acceleration

What is the missing symbol in the following nuclear transformation

Answers

Answer:

the missing symbol is 2 b e

Explanation:

Which organism is most responsible for the decrease in the great white shark population? (1 point)
O rays
O oysters
O scallops
O humans
com/index.html

Answers

Answer: Humans

Explanation: because humans kill great white sharks because scallops, rays and oyster cannot kill them

Answer:

Explanation:

The answer is d humans because i already took the test and that's the awnser

What is the number of molecules of CO2 in 0.236 moles?

Answers

Answer:

mole of CO2 = 6.023*10^23 molecules.

3 moles of CO2 = 3*6.023*10^23 molecules

therefore, 3 moles of CO2 = 18069*10^20 molecules.

It takes Maya 30 minutes to solve 5 logic puzzles, and it takes Amy 28 minutes to solve 4 logic puzzles. Use models to show the rate at which each student solves the puzzles, in minutes per puzzle If Maya and Amy had the same number of puzzles to solve, who would finish first? Explain.

Answers

Rate in which puzzles are solved:

Maya- 6 minutes per puzzle or 6/1
Amy- 7 minutes per puzzle or 7/1

If Maya and Amy had the same amount of puzzles to solve, Maya would finish first considering it takes Maya just 6 minutes to finish a puzzle as opposed to the 7 minutes it takes Amy.

Explanation: Divide 30 minutes by the 5 puzzles maya completed, to find out Maya does each puzzle in 6 minutes. Then divide 28 minutes by the 4 puzzles Amy completed, to find out it took her 7 minutes per puzzle.

Hope this helped :)

helppp me please !!

Answers

Answer is B - homeostasis is to keep internal conditions stable.

The following questions pertain to a 0.50 M solution of HOCl at 25â„ƒ. pKa = 7.46 at 25â„ƒ. a. Find the concentration of all species present in the solution at equilibrium. b. Find the pH of the solution. c. Identify the strongest base in this system.

Answers

The concentration of all species, the pH of the solution, and the strongest base is respectively given as)

C_HOCl=0.5C_H3O=1.137*10^{-7}ClO=1.137*10^{-4}

b)pH=3.88

c)ClO-

What are the concentration of all species, the pH of the solution, and the strongest base?

Question Parameters:

a 0.50 M solution of HOCl at 25â„ƒ. pKa = 7.46 at 25â„

Generally, the equation for the Chemical Reaction is mathematically given as

HOCl=H30+ClO

Therefore

ka=\frac{H3O(ClO)}{HOCl}

Ka=10^{-7.46}

x.x/0.5-x=10^{-7.46}

x=1.317*10^{-4}

In conclusion

the concentration HOCl

C_HOCl=0.5-1.137*10^{-4}

C_HOCl=0.5

the concentration H3O

C_H3O=1.137*10^{-7}

the concentration ClO

ClO=1.137*10^{-4}

pH=-log(1.317*10^{-4})

pH=3.88

The strongest base of the three is the

ClO-

Answers

Answer:

1.520

1.333

15.899

Explanation:

its very easy

N = n x No

No = avogadro's number = 6.02 x 10²³

n = mol

a. 9.52 x 10²⁶ : 6.02 x 10²³ = 1.58 x 10³ (3 sig figs)

b. 7.81 x 10²² : 6.02 x 10²³ = 1.30 x 10⁻¹ = 0.130 (3 sig figs)

c. 2.5 x 10²³ : 6.02 x 10²³ = 0.42 (2 sig figs)

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