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PolarNik [594]
3 years ago
8

A piece of wood near a fire is at 23°C. It gains 1,160 joules of heat from the fire and reaches a temperature of 42°C. The speci

fic heat capacity of
wood is 1.716 joules/gram degree Celsius. What is the mass of the piece of wood?
ОА. 16 g
OB. 29 g
ОC. 36 g
OD. 61 g
Chemistry
1 answer:
Molodets [167]3 years ago
6 0

Answer:

35.578g or 36g if you round

Explanation:

Q=mc ∆∅ where ∅ is temperature difference

1160= m x 1.716 x (42-23)

m = 1160/ 1.716 x19

m=35.578g

m = 36g to nearest whole number

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8°C

Explanation:

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3 years ago
How many moles of nitrogen, N, are in 61.0 g of nitrous oxide, N2O?
Oksana_A [137]

Answer:

2.77 mol N

Explanation:

M(N2O) = 2*14 + 16 = 44 g/mol

61.0 g * 1 mol/44g = (61/44) mol N2O

                       N2O ---- 2N

                    1 mol         2 mol

            (61/44) mol        x mol

x = (61/44)*2/1 = 2.77 mol N

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3 years ago
What do you mean by electronegativity ?​
Kamila [148]

Answer:

Electronegativity is a measure of an atom's ability to attract shared electrons to itself. On the periodic table, electronegativity generally increases as you move from left to right across a period and decreases as you move down a group.

Explanation:

Hope it is helpful....

6 0
3 years ago
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Planning for the possibility that the plumbing in your house needs repair is part of a plan for _____.
Vera_Pavlovna [14]

Answer:

planning for the possibility that the pluming in your house needs repair is part of <u><em>managing liquidity</em></u>

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100 on edginuity

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use dimensional analysis to determine how many atoms of o2 produced in a reaction that yields 2 mol of o2
Alex73 [517]

The number of atoms of oxygen is 2.4 * 10^24.

<h3>How many atoms are produced?</h3>

We know that mole of a substance contains the Avogadro's number of atoms. The Avogadro's number gives the number of atoms, molecules, ions and atoms that could be found in one mole of a substance.

Now;

Given that ;

1 mole of oxygen contains two atoms of oxygen, the number of atoms that are contained in 2 moles of the oxygen molecule is;

2 * 2 * 6.023 * 10^23

= 2.4 * 10^24

Learn more about dimensional analysis:brainly.com/question/13078117

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1 year ago
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