Answer:
grass, grasshopper, frog, snake, hawk
Explanation:
Answer:
No
Explanation:
A white dwarf has a higher surface temperature than a red giant.
Answer:
The correct answer is 117.68 g
Explanation:
In order to calculate the mass the chemist has to weigh, we have to multiply the concentration of the solution (0.200 M) by the volume (2.00 L). As the concentration is given in M (mol/L) we first have to convert the concentration from molarity to g/L by using the molecular weight of K₂Cr₂O₇.
From the Periodic Table we know the molar mass (MM) of the constituting elements K, Cr and O:
molecular weight K₂Cr₂O₇= (2 x MM K) + ( 2 x MM Cr) + (7 x MM O)
molecular weight K₂Cr₂O₇= (2 x 39.1 g/mol) + ( 2 x 52 g/mol) + ( 7+ 16 g/mol)
molecular weight K₂Cr₂O₇= 294.2 g/mol
Finally, we can calculate the mass as follows:
mass= 0.200 mol/L x 294.2 g/mol x 2.00 L= 117.68 g
A.
H20 and OH are a conjugate acid-base pair.
The depletion of natural resources, the use of chemical and fuel in factories that increased air and water pollution , and increased the use of fossil fuels.