The Concrete that surrounds a swimming pool takes less time to heat up than the water in the pool. Why

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?