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timurjin [86]
3 years ago
9

Complete combustion of 6.4g of compound K produced 8.8 g of carbon dioxide and 7.2 g of water. Calculate the empirical formula o

f K. ​
Chemistry
1 answer:
Elenna [48]3 years ago
7 0
Lh (x1)78.009+1= 0.0000567
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Adding acid and and catching the solution that drains through.
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A group 2 metal carbonate has a mass of 84 g/mol. Identify the group 2 metal X using its chemical formula.
zepelin [54]

Answer:

Magnesium

0.003mole

Explanation:

The problem here entails we find the metal in the carbonate.

 For group 2 member, let the metal  = X;

 The carbonate is XCO₃;

 If we sum the atomic mass of the elements in the metal carbonate, we should arrive at 84g/mol

 Atomic mass of C = 12g/mol

                            O  = 16g/mol

 Atomic mass of X + 12 + 3(16)  = 84

  Atomic mass of X  = 84 - 60  = 24g/mol

The element with atomic mass of 24g is Magnesium

B.

Number of moles in 0.3g of CaCO₃:

     Molar mass of CaCO₃   = 40 + 12 + 3(16)  = 100g/mol

 Number of moles = \frac{mass}{molar mass}  

 Number of moles  = \frac{0.3}{100}   = 0.003mole

7 0
3 years ago
Which subatomic particle is not found at the center of the atom?
Snezhnost [94]
The answer is nucleus
8 0
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Read 2 more answers
In which of the pairs listed below are both compounds strong electrolytes? Are any strong acids or bases?
Ganezh [65]
<h3>Answer:</h3>

NaCl and Sr(OH)2

<h3>Explanation:</h3>
  • An electrolyte is a substance that is either in molten or aqueous form that can be decomposed by passing an electric current through it.
  • Electrolytes are classified as either strong electrolytes or weak electrolytes.
  • Strong electrolytes are either strong bases or acids which completely ionizes to give mobile ions which are responsible for conduction of electricity.
  • NaCl is a salt and Sr(OH)₂ is a strong base, both are strong electrolytes.
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3 years ago
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