The answer is B. HOPE ITS RIGHT!
Answer:
There are 5 significant digits in 0.23100.
Explanation:
This is because all non-zero digits are considered significant and zeros after decimal points are considered significant.
I cannot answer this question if no initial mass for aluminum is given. Le'ts just suppose the initial mass of aluminum is 5 g. The reaction would be:
2 Al + 6 HCl --> 3 H₂ + 2 AlCl₃
The stoichiometric calculations are as follows:
Mass H₂ = 5 g Al * 1 mol/27 g Al * 3 mol H₂/2 mol Al * 2 g H₂/mol = <em>0.556 g H₂ produced</em>
Primary succession occurs in an area that has not been previously occupied by a community. Places where primary succession occurs include newly exposed rock areas, sand dunes, and lava flows. Simple species that can tolerate the often- harsh environment become established first.
B is the answer because the rest don’t sound accurate