Question 27 (2 points) How many grams of Cu are in 1.480 x 1025 cu atoms?
a
1,500g
b
1,562.36g
c
1,5625
d
1,5605
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1562 g

Explanation:

Step 1: Given data

Number of atoms of copper: 1.480 × 10²⁵ atoms

Step 2: Calculate the moles corresponding to 1.480 × 10²⁵ atoms of copper

We will use the Avogadro's number: there are 6.022 × 10²³ atoms of Cu in 1 mole of atoms of Cu.

1.480 × 10²⁵ atom × (1 mol/6.022 × 10²³ atom) = 24.58 mol

Step 3: Calculate the mass corresponding to 24.58 moles of copper

The molar mass of Cu is 63.55 g/mol.

24.58 mol × 63.55 g/mol = 1562 g (with 4 significant figures)

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

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