1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Doss [256]
3 years ago
6

How many grams of hydrochloric acid will react completely with a block of gold is 3.2 cm by 3.8 cm by 2.8 cm, if the density of

gold is 19.3 g/mL? Show all steps of your calculation as well as the final answer.
Au + HCl → AuCl2 + H2
Chemistry
1 answer:
JulijaS [17]3 years ago
4 0
Answer:
mass of HCl = 243.5426 grams

Explanation:
1- we will get the mass of the reacting gold:
volume of gold = length * width * height
volume of gold = 3.2 * 3.8 * 2.8 = 34.048 cm^3 = 34.048 ml<span>
density = mass / volume
Therefore:
mass = density * volume
mass of gold = </span>19.3 * 34.048 = 657.1264 grams

2- we will get the number of moles of the reacting gold:
number of moles = mass / molar mass
number of moles = 657.1264 / 196.96657 
number of moles = 3.3362 moles

3- we will get the number of moles of the HCl:
First, we will balanced the given equation. The balanced equation will be as follows:
Au + 2HCl ......> AuCl2 + H2
This means that one mole of Au reacts with 2 moles of HCl.
Therefore 3.3362 moles will react with 2*3.3362 = 6.6724 moles of HCL

4- we will get the mass of the HCl:
From the periodic table:
molar mass of H = 1 gram
molar mass of Cl = 35.5 grams
Therefore:
molar mass of HCl = 1 + 35.5 = 36.5 grams/mole
number of moles = mass / molar mass
Therefore:
mass = number of moles * molar mass
mass of HCl = 6.6724 * 36.5
mass of HCl = 243.5426 grams

Hope this helps :)
You might be interested in
Cómo se forma el enlace ionico​
scoundrel [369]

Answer:

El enlace iónico se forma por transferencia de electrones entre metales y no metales. El enlace covalente se forma al compartir electrones entre no metales.

Explanation:

5 0
2 years ago
Describe the changed that happened in the crayon and candle when they cooled after 3 to 5 minutes.​
AleksandrR [38]

Answer:

The change was physical, meaning it went from liquid to solid, or the other way around.

Explanation:

4 0
3 years ago
WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY TO LEARN!! WILL FOREVER BE GREATFUL!!! WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY
maxonik [38]

Answer:

3. Which side of the chain should you count from when naming organic compounds?

C) Side that will give you the longest Carbon chain

4. What is the pH of a solution with a pOH of 10?

C) 4

pH + pOH = 14

pH + 10 = 14

pH = 14 - 10

pH = 4

<u>-TheUnknownScientist</u>

3 0
3 years ago
Write with example of any three changes in the state of matter in daily life​​
Stella [2.4K]

Answer:

just wait 3 minutes ill tell you the answer cause its in my book

Explanation:

7 0
2 years ago
What is the molar mass of C3N4? (Do NOT round this number.)
vichka [17]

Answer:

92.06 g/mol

Explanation:

4 0
2 years ago
Other questions:
  • What is the empirical formula of the compound with the molecular formula c18h36?
    5·1 answer
  • What functional group of aspirin causes it to irritate the stomach?
    8·2 answers
  • CH4 + 2O2 CO2 + 2H2O + Heat
    15·2 answers
  • Nitrogen dioxide gas is produced by the reaction of nitrogen monoxide gas and oxygen gas .
    10·1 answer
  • Intrutrusive rocks are formed when magma is squeezed in between other rocks true or false
    8·1 answer
  • Why do the metals Co, Rh, and Lr form octahedral complexes (rather than tetrahedral or square planar complexes)? Hint: Look at t
    6·1 answer
  • HELP ASAP WILL MARK BRAINLIEST
    10·1 answer
  • I need help please WOTH this
    5·1 answer
  • What does the electronegativity of an atom indicate?
    12·2 answers
  • Atoms that gain<br> an electrons<br> have a _____<br> Charge?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!