We could say that there are five steps in scientific method: observation, hypothesis, prediction, experiment and conclusion. Observation is the first step and we could also call it research. In this step we must understand the problem in the right way. The hypothesis is the possible answer, based on the research. Prediction is even more specific than the hypothesis: on this stage, you must know how will you demonstrate that your hypothesis is true. Experiment tests your hypothesis and shows whether your hypothesis was true or false. After that you can proceed to making conclusion, which summarizes the experiment's results, and tells do the results match up to hypothesis and in which way.
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:
preganglionic; acetylcholine (ACh)
Explanation:
Answer:
the answer is false. Dieting usually leads to weight loss.
