Why do objects appear to move across the sky

An aqueous solution at 25 °C has a pOH of 12.42. Calculate the pH. Round your answer to 2 decimal places

The two balanced equations (1) and (2) are for reactions in which gaseous carbon dioxide is produced from the combustion of (1) solid carbon and (2) gaseous carbon monoxide. 1. C (s) + O2 (g) CO2 (g) + 94.0 kcal 2. CO (g) + ½ O2 (g) CO2 (g) + 67.

Why is it correct to say seawater is a mixture.

Main group elements have valence electrons in which suborbitals? Question 5 options: A) d and f B) s and d C) p and f D) s and p

Why was the weigh/filter paper used in this experiment? Check all that apply. a. to weigh the tablet to make sure that all of the broken pieces of tablet were added b. to the water to prevent the tablet from absorbing water c.

How many protons does one atom of sulfur have

Which shows the electron configuration for zinc (Zn) ? [Kr]5s24d10 [Kr]5s24d6 [Ar]4s23d9 [Ar]4s23d10

What is the oxidation number of chromium in the ionic compound ammonium dichromate (nh4) 2cr2o7?

Draw an ecosystem with 10 biotic and 5 abiotic factor

Which organism is responsible for cleanup in this ecosystem? coyote vulture prairie dog grasshopper or prairie grass