HELP PLEASE I LOVE YOU THANK YOU Question 5 of 10
Which of the following reactions shows a chemical change producing a gas?
A. NaCl(s) + NaCl(aq)
B. H2(g) + O2(g) → H2O(1)
O C. 2CH3OH() + 302(g) → 2C02(g) + 4H20(1)
O D. 2AgNO3(aq) + Cabr2(aq) + 2AgBr(s) + Ca(NO3)2(aq)

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.

If two identical atoms are bonded, what kind of molecule is formed