Who determined that the elements needed to be arranged by atomic number instead of atomic mass?

How many moles of NaOH are needed to make a 1 M solution?

What happens to particles when P waves and S waves pass through them? (A). Particles travel in waves as P waves pass through materials. Particles twist and shake as S waves pass through materials. (B).

Where are the metals in the periodic table?

Elvis flew his jet 2100 miles at an average speed of 350 mph how long did Elvis trip take

Gravity on Earth is 9.8 m/s2, and gravity on the Moon is 1.6 m/s2. So, if the mass of an object on Earth is 40 kilograms, its mass on the Moon is? kilograms and its weight on the Moon is? newtons.

Which of the following experimental observations proved that the idea of matter and mass being evenly distributed in an atom was flawed? A. Less than 1% of the alpha particles went un-deflected through the gold foil. B.

Calculate the energy E of a sample of 3.50 mol of ideal oxygen gas (O2) molecules at a temperature of 310 K. Assume that the molecules are free to rotate and move in three dimensions, but ignore vibrations.

Gasohol is a fuel containing ethanol (c2h6o) that burns in oxygen (o2) to give carbon dioxide and water.

What type of rock does the ocean floor consist of? 1 Igneous basalt rock 2 Igneous granite rock 3 Sedimentary rock 4 Metamorphic rock

Consider the combustion of liquid methanol, ch3oh (l) : ch3oh (l) + 3/2o2 (g) →co2 (g) + 2h2o (l) δh=-726.5kj part a what is the enthalpy change for the reverse reaction?