The assumption that is made when considering the reaction of magnesium and 2 m HCl is that the solid magnesium is uniform all throughout so that the reactant's mass can be calculated. Also, in order to obtain a complete reaction, there should be an excess HCl to completely consume the magnesium.
Answer : Barium sulfate
and Sodium nitrate
are produced during replacement reaction.
Explanation :
Double-displacement reaction : It is a type of chemical reaction in which two reactants exchange ions to form two new compounds.
The Net balanced chemical reaction is ,
This is a double-displacement reaction.
In this reaction, barium nitrate react with the sodium sulfate to produce barium sulfate and sodium nitrate.
It is important for scientists to utilize the scientific method (to the extent of applying this in everyday life). Generally, the basic steps of scientific method are: making observations, preparing a hypothesis, designing an experiment, analyzing results, and to finally make a conclusion.
This means that if a scientist makes an observation that is quite unnatural to what he currently knows, it is important for him to question existing ideas and propose a new hypothesis. And to find the answer to his question, he must think creatively to design experiment and be able to scrutinize his/her own observations.
From this, we can see that from the choices, all must hold true except for B<span>.</span><span />
I think is C try it I hope this helps
If you are talking about the Gold-foil experiment:
During Rutherford's time, the JJ Thomson (plum pudding) model was the accepted version of an atom. However when Rutherford shot positive alpha particle rays at a piece of gold foil. Some of the particles bounced back, meaning that Atoms had a positive center. Most of the particles went through, which means that Atoms are mostly empty space.
