HotelInfantesAgres - Together we solve school questions. Logo

Questions in chemistry

[Homework Help] Consider the substances below. - 1 mol of beryllium - 1 mol of salt - 1 mol of water - 1 mol of hydrogen Which statement is true about these substances? 1. They have exactly the same mass. 2. They have different numbers of particles. 3. They have the same number of atoms. 4. They have different masses.

[Homework Help] How does the law of definite proportions apply to hydrates?

[Homework Help] What kind of lens does a nearsighted person need?

[Homework Help] Why is a yellow flame called a safety flame if it could burn you seriously?

[Homework Help] Why is a can of peas and carrots a mixture? What other mixtures can you list?

[Homework Help] What are some common mistakes students make with decomposition reactions?

[Homework Help] If a certain ocean wave has a frequency of 0.09 hertz and a wavelength of 10 meters, what is the speed?

[Homework Help] What happens when you open a bottle of perfume?

[Homework Help] A solution is prepared by dissolving sugar in water. The solution is 25.0% by mass sugar. How many grams of water are in 472 grams of this solution? a) 118 g b) 157 g c) 408 g d) 354 g e) 396 g

[Homework Help] What are the mass and volume of a cork? What are the mass and volume of iron? Please provide the calculations and work for each.