C. Gas atoms under high pressure emit dark lines against a continuous spectrum
Answer:
1250
Explanation:
Used a half life calculator, put in the given variables, and the answer was the remaining quantity. Got it right on the test as well
Answer:
secondary alcohol
Explanation:
NaOH in solution provides OH- nucleophile.
When 2-chloropropane is treated with NaOH, nucleophillic substitution reaction takes place.Here leaving group is Chlorine atom (Cl).
Here OH- replaces Chlorine (Cl) to form 2-propanol which is a secondary alcohol.(OH group attached to 2° carbon)
Other possibility is elimination reaction in which NaOH acts as base.
NaOH acts as base when it is concentrated and aqueous NaOH acts as nucleophile.
In that case,the product formed will be an alkene.(not there in option)
A) The recursive formula for the number of seats in the n th row will be;
S1 = 9
S(n) = S (n-1) +2
b) Explicit formula; is that of an arithmetic progression; such that if a is the first term , and d is the common difference , then the n th term will be given by the formula: a + (n-1) d; where a is 9, and d is 2
Hence; for n th row = 9+ 2(n-1)
c) Number of seats in 12 th row using the formula in b.
n = 12 , a = 9, d = 2
therefore; 9 + 2(12-1)
= 9 + 2(11)
= 31 seats
1smoking, mouth cancer
2anorexia brittle hair
3bulimia torn esophagus
4cirrhois