Answer:
Because they have scaled feet
Answer:
Explanation:
Generally, the factors that affect rate of chemical reactions include
- pressure (affects non-solid reactants)
- surface area of solid reactants
- concentration of reactants
- presence/absence of catalysts
From the above, it shows that some of these factors do not need to be considered when discussing rate of reaction of gases of equal moles as we have in the question.
The factors that will determine the difference in the reaction rates of the gases in the two syringes will just be temperature of the syringes (if the temperature of the syringes are not the same) and the pressure applied on the gases in the syringes (if the pressure applied to the syringes are not the same). If catalyst is introduced to one and not to the other, that will be increase the rate of the reaction in the one the catalyst is introduced and hence the reaction rate varies.
An increase in temperature and/or pressure will lead to an increase in the rate of reaction.
Answer:
Answer:
28
Explanation:
it states that the atom is neutral, meaning the number of electrons and protons are the same. so if there are 13 electrons, there are 13 protons. And the mass number is neutrons plus protons. So 13+15 is 28
Substance 3 Is most likely to be a Metal for Its malleability and conductive properties.
Answer: 14.62 ml
Explanation:
Molarity is defined as the number of moles of solute dissolved per liter of the solution.
where,
n= moles of solute
= volume of solution in ml = 250 ml
Now put all the given values in the formula of molarity, we get
To calculate the volume of base, we use the equation given by neutralization reaction:
where,
are the n-factor, molarity and volume of acid which is
are the n-factor, molarity and volume of base which is NaOH.
We are given:
Putting values in above equation, we get:
Thus the volume of NaOH solution the student will need to add to reach the final equivalence point is 14.62 ml