Energy required to heat 155 grams copper 90 degrees celcius

Alculate the concentration of h3o⁺in a solution that contains 5.5 × 10-5m oh⁻at 25°c. identify the solution as acidic, basic, or neutral.a) 1.8 × 10-10m, basicb) 1.8 × 10-10m, acidicc) 5.5 × 10-10m, neutrald) 9.2 × 10-1m, acidice) 9.2 × 10-1m, basic

Compare and contrast refraction of light and sound will give brainliest

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)