Do all substances have the same chemical formula? why or why not?

An open-tube manometer is used to measure the pressure in flask. The atmospheric pressure is 756 torr and the Hg column is 10.5 cm higher on the open end. What is the pressure in the flask?

The net force determines how and if an object will? A) make a balanced force B) change its mass C) move or accelerate

What experiment did J. J thomson do? A) He suspended charged oil drops in a chamber B) He shot alpha particles through golf foil C) He sent a cathode ray between electrically charged metal plates D) He hit metal plates with light

Read the list of common household substances. Antacid, orange juice, toothpaste, yogurt Which of these substances are likely to have a sour taste? A. Antacid, yogurt B. Antacid, toothpaste C. Orange juice, yogurt D. Orange juice, toothpaste

What type of rock is cooled off the faster when it formed from liquid rock

A light-year measures the distance a light beam can travel in one year. One light-year is equal to 9 500 000 000 000 kilometers.

The first ionization energy, e, of a potassium atom is 0.696 aj. what is the wavelength of light, in nm, that is just sufficient to ionize a potassium atom? values for constants can be found here.

A gene is a to a chromosome as (A) a pea is to a pod (B) a front to a back (C) a bike is to a car (D) a building is to a window

How are you enjoying this weather? (i need good reasons}

In today's experiment, some lab students let their chromatograms elute slightly longer than others. If one student's solvent front traveled to 9.80 cm, and another student's solvent front traveled 8.