"a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction."
a reaction that is caused by chemicals
Answer:
E
Explanation:
So this question tests your understanding of mole:mole ratios.
So looking at the equation we see for every 3 O2 there's 4 NH3, we can even word it like for every 4 mol of NH3 that reacts you need 3 moles of O2. This gives us the mole:mole (mole to mole) ratio of 3 mol O2/ 4 mol NH3.
Now since you have 3.5 moles of NH3 you can use the ratio from above to convert it to O2 by simply 3.5molNH3 * 3mol O2/4mol NH3 ------> 2.625mol O2
The Magic Number is 39!
1 and 14 didn't go in squares.
Democritus: 2
Dalton: 7
Thomas: 18
Chadwick: 12
Rutherford: 8
Proton: 5
Atom: 11
Bohr: 15
Wave Model: 13
Neutron: 17
Nucleus: 6
Alpha Particle: 3
Electron: 16
Model: 10
Energy Levels: 4
Electron Cloud: 9
Answer:
26.6 g of CaCl₂ are required to make a 4M solution
Explanation:
4 M = Molarity of the solution
This is a type of concentratrion for solutions, that indicates the moles of solute in 1L of solution.
Solution's volume = 60 mL
We need to convert the volume from mL to L → 60 mL . 1L / 1000mL = 0.060L
Molarity = mol / volume (L) → Molarity . volume (L) = mol
4 M . 0.060L = 0.24 mol of solute
Let's convert the moles to mass → Molar mass CaCl₂
0.24 mol . 110.98 g / 1mol = 26.6 g
Answer: oxygen is not a atom Oxygen is the chemical element with the symbol O and atomic number 8
Explanation: