Answer:
The fourth one- bromo trifluoro methane
Explanation:
Answer:
A forensic palynologist is a spore and pollen expert that helps solve crimes.
The case that Mildenhall worked on was about a murder that involved a prostitute. The police couldn’t find a trace to help solve the case, so they called Mildenhall to help with pollen clues. He was able to find trace evidence in the pollen, which helped police connect the victim to a gang hangout by the crime scene.
A forensic palynologist can help with a criminal investigation by comparing pollen from the suspect and the victim using a comparison microscope to determine if the pollen matches.
The challenges of using a forensic palynologist in a criminal investigation are that judges and juries may have a hard time understanding palynologists.
Explanation:
Answer:
The correct answer is : 0.025.
Explanation:
The precipitation reaction is as follows in this procedure:
NiSO4.6H20 (aq) + Na2CO3.10H2O (aq)⇒ NiCO3 (s) + Na2SO4 (aq) + 16H2O
So, the number of moles of reactants can be found by
number of moles : mass used/ molar mass
n (NiSO4×6H2O) = (6.57 g)/(262.84 g/mol) = 0.025 mol (for Ni)
n (Na2CO3×10H2O) = (7.15 g)/(286.14 g/mol) = 0.0250 mol (for CO3).
Thus, The maximum number of moles of NiCO3 that can form is 0.025 mol.
Answer:
You multiply the atomic mass of each element (in this case, Sulfur and Oxygen), by the number of atoms there is of each element
Explanation:
