The balanced chemical reaction would be
<span>fecl2 + 2naoh = fe(oh)2(s) + 2nacl
Initial amounts of the reactants are given, so, we need to determine which of the reactants is the limiting reactant and use this amount to determine what is asked. However, what is being asked is how many of the FeCl2 is used in the reaction, showing that it is NaOH that is the limiting reactants. Thus, we just use the initial amount of NaOH and relate the substances by the chemical reaction as follows:
6 mol NaOH ( 1 mol FeCl2 / 2 mol NaOH ) = 3 mol FeCl2
Therefore, 3 moles of FeCl2 is used up and 3 moles of FeCl2 is also left after the reaction.</span>
Answer:
free fall
Explanation:
the answer is the third one.
Answer:
0.0075 or 7.5x10⁻³
Explanation:
Hello!
In this case, when rounding to two significant figures a number that is less than 1, we take into account that the left-handed zeros, prior to the first nonzero digit are not significant, for 0.007462, two significant figures include the 7 and the 4; however, that 4 is rounded up to 5 since there is a 6 after it, and therefore, the correct representation would be either of the following ones:
0.0075
7.5x10⁻³
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12000000000000000000000000