Master Chemistry with Fun Quizzes & Brain Teasers!

use dimensional analysis to slove; a reasearcher is given 1.5 dry oz of a substance which he needs to evenly distribute over 10 vials. how many micrograms schools each vial contain? show all work.
1 Answer
use dimensional analysis to slove; a small carton of milk contains 1 cup. if a cup equals 8 oz, how many cubic centimeters does it contain?
1 Answer
In terms of the atmosphere, which of the following best describes the oxygen that is present?It is the solvent in a homogeneous gas mixture.It is the solute in a heterogeneous gas-liquid mixture.It is the solvent in a heterogeneous mixture.It is the solute in a homogeneous gas mixture.
1 Answer
Draw the structure of the product that is formed when the compound shown below undergoes a reaction with PhMgBr and then is treated with water.
1 Answer
(8.6B) Speed, Velocity, and Acceleration:Question 1 What two factors are needed in order to compute the speed of a car? Select one: A speed and acceleration B:acceleration and time c:speed and distance D:distance and time
1 Answer
Help ASAP!! Chlorine's 3p sublevel has 5 electrons in it. It needs _____ electron(s) more in the 3p sublevel to make it stable.a). 5b).4c).3d).2e).1
1 Answer
How are electrons arranged around the nucleus of an atom
2 Answers
describe what the isotopes of an element have in common and how are they different.
2 Answers
As a pendulum swing from its highest to its lowest position along an arc, what happens to its kinetic energy and potential energyA. Both the potential energy and kinetic energy decreaseB. The potential energy decreases while the kinetic energy increasesC. The kinetic energy decreases while the potential energy increasesD. Both the potential energy and kinetic energy increase
1 Answer
How many 15W LED bulbs could Niagara Falls power?
1 Answer
Explain the four basic types of chemical reactions. Be sure to include a sample equation for each type. Describe how rate relationships and activation energy are important in chemical reactions.
1 Answer
How many atoms are in 8g of Oxygen (O2)?
1 Answer
A scientist is observing onion cells and human cheek cells under a microscope.Which observation does she most likely make? The onion cells have lysosomes, and the cheek cells do not. The cheek cells have larger vacuoles than the onion cells. The cheek cells have a nucleus, and the onion cells do not. The onion cells have a cell wall, and the cheek cells do not.by the way this is scienceplease answer this quick
2 Answers
In a neutral aluminum atom with atomic number 13, how manyprotons, neutrons and electrons are there?
1 Answer
Why does Earth get more energy from the sun than from all the other stars in the universe combined?A.) The sun is much hotter than the other stars.B.) The sun is much more dense than the other stars,C.) The sun is much closer than the other stars.D.) The sun is much larger than the other stars,
2 Answers
The Milky Way galaxy is described as a disk of stars orbiting a central point on the disk. Which of these best explainswhy people on Earth cannot see the entire shape of the Milky Way?A.) Many more stars exist outside the galaxy.B.) Earth is a part of this galaxy.C.) The stars in the center of the galaxy are extremely small.D.) The center of the galaxy consists of a dense cluster of stars.
2 Answers
four main states of matter?
2 Answers
A mole of an element in solid state is about the size of a(n)
1 Answer
What did Helsenberg's Uncertainty Principle show about electrons?
1 Answer
1. How many sublevels are in the following principal energy levels?a. n=1b. n=2c. n=3d. n=4e, n=5f. n=6
2 Answers
1. Ethanoic acid is a weak acid and hydrochloric acid is a strong acid.
1 Answer
pls help!! will give brainly New evidence can lead to a change in scientific knowledge. (3 points) True False
2 Answers
Nylon is an important component in many products. One step in the production of nylon is the reaction of cyclohexane with oxygen to give cyclohexanone and water, shown below in the balancedreaction in line formula notation. Determine the energy change for this process using bond energies.
1 Answer
Review scientists and their contributions to atomic theory by filling in the tablebelow.
1 Answer