Which of the following equations is balanced correctly? a. 3 h2o → h2 + 3 o2 b. cl2 + 2 kbr → kcl + br2 c. 2 c2h2 + 5 o2 → 4 co2 + 2 h2o d. 2 c3h3 + o2 → 2 co2 + h2o

Two polarizers are oriented at 24.0∘ to one another. light polarized at a 12.0-degree angle to each polarizer passes through both. what is the transmitted intensity (%)?

If the radius of curvature of the cornea is 0.75 cm when the eye is focusing on an object 36.0 cm from the cornea vertex and the indexes of refraction are as described before, what is the distance from the cornea vertex to the retina? express your answer to two significant

What is an aquifer for science class