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3 years ago

What is the balanced molecular equation for the reaction of solid aluminum hydroxide with a solution of hydrobromic acid?

1 answer:

5 0

Al(OH)3 + 3HBr -> AlBr3 + 3H2O

Al(OH)3 is a solid, HBr is aqueous, AlBr3 is aqueous and H2O is liquid.


Ionic Equation 

Al(OH)3 + 3H^+ -> Al^3+ + 3H2O

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A wafer of gold measuring 15 cm x 20 cm has a mass of 600 g. How thick is this wafer in mm ?

Gre4nikov [31]

600,000 mm if im not mistaken.

7 0

3 years ago

Determine the resulting pH when 12mL if 0.16M HCl are reacted with 32 mL if 0.24M KOH.

TEA [102]

Answer:

pH = 13.1

Explanation:

Hello there!

In this case, according to the given information, we can set up the following equation:

$HCl+KOH\rightarrow KCl+H_2O$

Thus, since there is 1:1 mole ratio of HCl to KOH, we can find the reacting moles as follows:

$n_{HCl}=0.012L*0.16mol/L=0.00192mol\\\\n_{KOH}=0.032L*0.24mol/L=0.00768mol$

Thus, since there are less moles of HCl, we calculate the remaining moles of KOH as follows:

$n_{KOH}=0.00768mol-0.00192mol=0.00576mol$

And the resulting concentration of KOH and OH ions as this is a strong base:

$[KOH]=[OH^-]=\frac{0.00576mol}{0.012L+0.032L}=0.131M$

And the resulting pH is:

$pH=14+log(0.131)\\\\pH=13.1$

Regards!

3 0

3 years ago

Given the reaction: 4NH3 + 502 4NO + 6H2O

Ainat [17]

Answer:

$\frac{4}{5}$ moles

Explanation:

The reaction equation is given as:

4NH₃ + 5O₂ → 4NO + 6H₂O

The number of moles of O₂ that completely reacted is given as 1 mole

To solve this problem, we are going to use a stoichiometric approach from the balanced reaction equation:

5 moles of O₂ will react completely to produce 4 moles of NO

1 mole of O₂ will therefore react to produce x mole of NO

5x = 4

x = $\frac{4}{5}$ moles of NO

8 0

4 years ago

Which of the following pairs does not share the same empirical formula? C2H6 and C6H18 C3H6O3 and C2H4O2 C3H6 and CH4 CH2O and C

denpristay [2]

C3H6 and CH4

The empirical number is found by looking at the ratio of the numbers. For example, H20 and H402 have the same empirical formula because the ratio remained similar. 2 H to 1 O.

3 0

3 years ago

Read 2 more answers

H2 + NO → H2O + N2 If 180.5 grams of N2 are produced, how many grams of H2 were reacted?

Lena [83]

Answer:

12.89 moles

Explanation:

Before we solve the question, we have to balance the equation of the reaction first. The balanced reaction will be:

2 NO + 2 H2→ N2 + 2 H2O

There are 180.5g of N2 produced, the number of produced in moles will be: 180.5g / (28g/mol)= 6.446 moles

The coefficient of H2 is two and the coefficient of N2 is one. Mean that we need two moles of H2 for every one mole of N2 produced. The number of H2 reacted will be: 2/1 * 6.446 moles = 12.89 moles

6 0

4 years ago