Answer:
Hydrogen and helium are different elements. How can you use the plum pudding model to show how atoms of the two elements might be different from one another? Answer: Possible answer: The two types of atoms could have different amounts of positive fluid and different numbers of electrons.
Answer:
C. NaCl
Explanation: The answer is C because the products are water and salt. Hydrochloric acid is a strong acid and NaOH ( sodium hydroxide is also a strong acid) are the reactants.
Answer: B) The identity of the solvent
Explanation:
Basically, the solvent is the liquid in which a solute is dissolved in. But the solute is the material to be dissolved.
Now in this case, the solute in the first solution is glucose and the solute in the second solution is an unidentified covalent solid material.
This means that:
• the identity of the solute cannot be identical in each solutions, which also means that the freezing points and densities of the solutions cannot be identical too.
• the only thing that is sure to be identical in the solution is the identity of the solvent.
<u>Answer:</u>
All of the limiting reagent gets used up causes the percent yield of a reaction to be less than 100%
<u>Explanation:</u>
It is rare for a chemical reaction to occur with the right proportion of reactants that reacts together to form resultant products.During this process, one of the reactants gets used up faster resulting in the lower percent yield. Such product that gets used up faster is called limiting reagent. This limiting reagent is responsible for lowering the percentage yield in the chemical reaction.
The limiting reactant can be found easily by calculating the yield of each reactant assuming they are consumed completely. The reactant which has least yield is the limiting reactant of the reaction.
Uranium is a radioactive substance, which is extremely reactive. As a consequence, it cannot be found in the environment in its elemental state. During uranium, mining disturbances can influence both the quality and quantity of the surface water.
Several of the effects of uranium mining are identical to those experienced in other kinds of mining.
Due to the harmful effects of radioactive substances, the uranium mining for the use of nuclear energy has the greatest environmental influence.