Which element has six valence electrons in each of its atoms in the ground state?

(1) Se

(2) As

(3) Kr

(4) Ga

A 25.0 mL solution of quinine was titrated with 1.00 M hydrochloric acid, HCl. It was found that the solution contained 0.125 moles of quinine. What was the pH of the solution after 50.00 mL of the HCl solution were added

What answers below correctly identifies the type of change and explanation for the mixture of calcium carbonate and hydrochloride acid

Potassium hydroxide molar mass

A new thermometer is being developed using volume of gas. A balloon is filled with air and calibrated for room temperature to have a volume of 1000 ml. Some time later that week the balloon is measured to have a volume of 900 ml.

1. What is interdisciplinary science? 2. what are some of the ways in which modern science and technology have changed our lives? 3. what are some methods scientist used in making discoveries and developing themes?

Consider the following thermochemical equation: C (s) + O2 (g) → CO2 (g) ΔH = - 393 kJ CO (g) + ½O2 (g) → CO2 (g) ΔH =

Two colorless solutions are mixed together. Bubbles form as the solution is stirred. Give TWO possible explanations for this result.

What is a light-year? A. the distance light travels in one earth year B. the distance light travels from the sun to the earth C. the distance light travels in one orbit of the moon D. the time it takes light to travel across the universe

What's is a logical way that you could begin to investigate why your tire had low air pressure?

after balancing the redox equation FeCl3+Zn--->ZnCl2+Fe, what are the coefficients, in order from left to right?