<span>the value of a transitional fossil is : A. Transitional forms show the evolutionary steps between species
For example, take a look at human's transitional fossil.
Through the fossil, we became aware about the evolution that happened within the human species and we can observe how we developed from a monkey-like organisms into a more superior organism as we are today</span>
Answer:
0.062 moles of hydrogen gas
Explanation:
We must first out down the reaction equation before we can attempt to solve the problem.
Mg(s) + 2HCl(aq) ----> MgCl2(aq) + H2(g)
Next we obtain the number of moles in 1.5 g of magnesium metal from;
Molar mass of magnesium = 24.3 gmol-1
Number of moles of magnesium= mass/molar mass = 1.5g/24.3gmol-1 = 0.062 moles
From the reaction equation;
1 mole of magnesium metal yields 1 mole of hydrogen gas
0.062 moles of magnesium metal will yield 0.062 moles of hydrogen gas
Therefore, reaction of 1.5g of magnesium metal with excess hydrochloric acid will yield 0.062 moles of hydrogen gas.
Answer:
2Mg + O₂ → 2MgO
Explanation:
<u>Given reaction is:</u>
Mg + O₂ → MgO
<u>On the right side, we have:</u>
1 Mg, 1 O
<u>On the left side, we have:</u>
1 Mg, 2 O
- Add 2 as a coefficient with Mg on the right side of rxn. (Will make it 2 Mg, 2 O)
- Now, Add 2 as a coefficient with MgO of the left side of rxn. (Will make it 2 Mg, 2 O)
Hence, the reaction is balanced now!
<u>Final and balanced reaction is:</u>
2Mg + O₂ → 2MgO
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Hope this helped!
<h3>~AH1807</h3>
I'm not sure what the options were, but a cell would die if it didn't have enzymes. :)
