Which of the following groups of elements is ranked from least reactive to most reactive? Group of answer choices

K, Na, Li, H

K, Ca, Sc, Ti

Sr, Ca, Mg, Be

Li, Na, K, Rb

Cucl2 + 2nano3 cu(no3)2 + 2nacl what is the percent yield of nacl if 31.0 g of cucl2 reacts with excess nano3 to produce 21.2 g of nacl? 49.7% 58.4% 63.6% 78.7%

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

How many moles of oxygen react with 12 moles of aluminum