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ki77a [65]
3 years ago
5

What will be the final temperature when a 25.0 g block of aluminum (initially at 25 °C) absorbs 10.0 kJ of heat? The specific he

at of Al is 0.900 J/g·C.
Chemistry
1 answer:
atroni [7]3 years ago
4 0
LET'S PUT IN WHAT WE KNOW!!!
Q
=
725 J
m
=
55.0 g
c
=
0.900 J/(°C⋅g)
Δ
T
=
final temperature - initial temperature
Δ
T
=
(
x
−
27.5
)
°C
We solve for
Δ
T
.
725 J
=
55.0 g
⋅
0.900 J/(°C⋅g)
(
x
−
27.5
)
°C
NOW IT'S JUST BASIC ALGREBRA
725
=
49.5
x
−
1361
2086
=
49.5
x
42.1
=
x
The final temperature is 42.1 °C.
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What are the representative elements? Where are they located
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Which ion is larger? Cu+ Cu2+ Why? Because Cu2+ has the filled 4s subshell. Because Cu2+ cannot be oxidized further. Because Cu2
jek_recluse [69]

The atomic number of Cu = 29

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Cu+ is formed when 1 electron is lost from Cu. Therefore, the atomic number for Cu+ = 28

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5 0
4 years ago
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How many atoms of each element are in Copper Sulfate (CuSO4)? Name the elements and the number of atoms for each element.
Sati [7]
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8 0
3 years ago
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Help me please!!
WINSTONCH [101]

Answer:

663 g

Explanation:

Step 1: Write the balanced equation

2 LiOH + CO₂ ⇒ H₂O + Li₂CO₃

Step 2: Calculate the moles corresponding to 825 L of CO₂

At standard pressure and temperature, 1 mole of CO₂ has a volume of 22.4 L.

825 L × 1 mol/22.4 L = 36.8 mol

Step 3: Calculate the moles of H₂O formed from 36.8 moles of CO₂

The molar ratio of CO₂ to H₂O is 1:1. The moles of H₂O formed are 1/1 × 36.8 mol = 36.8 mol.

Step 4: Calculate the mass corresponding to 36.8 moles of H₂O

The molar mass of H₂O is 18.02 g/mol.

36.8 mol × 18.02 g/mol = 663 g

3 0
3 years ago
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