Answer:
994,491 were caught in 2017
Answer: No
Explanation: The reason for this is because calcite has a hardness of 9 while feldspar has a hardness of 21. Calcite can scratch Gypsum which has a hardness of 3.
Answer: The answer is C
covalent bonds have a lower melting and boiling point
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Answer: 1mole of NaCl
Explanation:
Looking at the given equation :CaCl2 (aq) + Na2CO3 (aq) → CaCO3 (s) + 2 NaCl (aq)
The following deductions can be made,
1 mole of CaCl2 reacted with 1 mole of Na2CO3 to produce 1mole of CaCO3 and 2NaCl.
If 0.500 mole of CaCO3 was produced from this same reaction,it therefore means that we multiply the coefficients of both reactants and product by 0.500 to know the moles of NaCl that will also come out from this same reaction..
So we have the new equation to be:
0.5CaCl2 (aq) + 0.5 Na2CO3 (aq) → 0.5 CaCO3 (s) + 1 NaCl (aq)
From the new equation,1mole of NaCl will be produce alongside 0.5mole of CaCO3,when 0.5mole of CaCl2 reacts with.0.5mole Na2CO3.
