A) How many grams of Cu(OH)2will precipitate when excess NaOH solution is added to 42.0mL of 0.641 M CuI2 solution?

Which of the following lists the elements in order of increasing malleability

dimulka [17.4K]

a...if you had the fully extended periodic table, these elements would be between La and Hf in period 6 and Ac and Rf in period 7

3 0

3 years ago

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What is the theoretical yield of aluminum that can be produced by the reaction of 60.0 g of aluminum oxide with 30.0 g of carbon

Varvara68 [4.7K]

Answer: 31.8 g

Explanation:

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$

$\text{Moles of} Al_2O_3=\frac{60.0g}{102g/mol}=0.59moles$

$\text{Moles of} C=\frac{30.0g}{12g/mol}=2.5moles$

$Al_2O_3+3C\rightarrow 2Al+3CO$

According to stoichiometry :

1 mole of $Al_2O_3$ require 3 moles of $C$

Thus 0.59 moles of $Al_2O_3$ will require= $\frac{3}{1}\times 0.59=1.77moles$ of $C$

Thus $Al_2O_3$ is the limiting reagent as it limits the formation of product and $C$ is the excess reagent as it is present in more amount than required.

As 1 mole of $Al_2O_3$ give = 2 moles of $Al$

Thus 0.59 moles of $Al_2O_3$ give = $\frac{2}{1}\times 0.59=1.18moles$ of $Al$

Mass of $Al=moles\times {\text {Molar mass}}=1.18moles\times 27g/mol=31.8g$

Thus 31.8 g of $Al$ will be produced from the given masses of both reactants.

5 0

3 years ago

W myFLVS

bazaltina [42]

Answer:

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Explanation:

5 0

3 years ago

A carbon forms one bond to an X atom plus three more bonds to three hydrogen atoms. If the hybridization to X has 81% p-characte

liraira [26]

Answer:

110 degree

Explanation:

This is because Hybridization of an s orbital with all three p orbitals (px , py, and pz) results in four sp3 hybrid orbitals. sp3 hybrid orbitals are oriented at bond angle of 109.5 degrees from each other. This 109.5 degrees gives an arrangement of tetrahedral geometry

5 0

3 years ago

The equilibrium 2NO(g)+Cl2(g)⇌2NOCl(g) is established at 500 K. An equilibrium mixture of the three gases has partial pressures

QveST [7]

Answer:

For A: The $K_p$ for the given reaction is $4.0\times 10^1$