Answer:
The corect answer would be C.
Explanation:
The flow rate set at a differentt time would be the correct measurement beecause wats and speed add up to your main answer.
Answer:
0.0400 g for the example given below.
Explanation:
pH value is not provided, so we'll solve this problem in a general case and then we will use an example to justify it.
- By definition,
. - NaOH is a strong base, as it's a hydroxide formed with a group 1A metal, so it dissociates fully in water by the equation:
. - From the equation above, using stoichiometry we can tell that the molarity of hydroxide is equal to the molarity of NaOH:
. - Concentration of hydroxide is then equal to the ratio of moles of NaOH and the volume of the given solution. Moles themselves are equal to mass over molar mass, so we obtain:
. - We also know that
. Take the antilog of both sides:
. - Solve for the mass of NaOH:
.
Now, let's say that pH is given as 12.00 and we use a 100-ml volumetric flask. Then we would obtain:

Answer:
The statement 4.
Explanation:
Alex mentioned all the steps of the formation of fossil, however, he forgot to add a step prior to step 4. The step, which he should incorporate prior to step 4 is that the hard portions of the species get buried within the ocean and then the chemical and physical modifications occurs with the species. After that the sediment formation occurs, which eventually gets transformed into rocks.