Explanation:
Elements are distinct substances that cannot be split-up into simpler substances. Such substances are made up of only one kind of atom.
- Elements are classified as pure substances.
- They are homogeneous in all parts.
- They have a definite composition.
- They cannot be split or broken into simpler substances by physical means.
- There are over a hundred known elements.
- Elements are usually symbolized by a capital letter or capital letter followed by a smaller letter derived from the English or Latin or Greek name of the element concerned.
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a) Two or more atoms held together with bonds make up a molecule. b) Pure substances are made of only one type of atom. c) At least two types of atoms are required to make a compound. d) Mixtures can be made of two elements, two compounds, or an element & a compound.
Answer:
H2 + CaCl2 -> 2HCl + Ca
How many grams of HCl are made when 2.93 g of
Ca are made?
Explanation:
From the given balanced chemical equation, it is clear that:
2mol. of HCl and 1mol. of Ca are produced.
2mol. of HCl weighs --- 73.0g
1mol. of Ca weighs --- 40.0g
Hence,
73.0g of HCl and 40.0g of Ca are produced.
When 2.93g of Ca is produced then, how many grams of HCl will be produced?
Hence, 5.35g of HCl is formed.
I don’t know it’s 500 hot water
Answer:
HBr + Mg(OH)2 —> MgBr2 + H2O.
To balance the above, we must do a head count of the individual atoms present to ensure they balance on both sides of the equation. To get the balance equation, add 2 in front of HBr and 2 in front of H2O as shown below:
2HBr + Mg(OH)2 —> MgBr2 + 2H2O
We can see clearly that the numbers of the individual atoms on the left side is the same on the right side
