The molar mass of V2O3 is A. 66.94 B. 133.88 C. 149.88 D. 200.82

23. Select the evidence that Thomson used to conclude his findings.

Ilya [14]

Answer:

The answer is C

Explanation:

Thomson conducted many tests with cathode rays. Which led to his discovery of the electron.

8 0

3 years ago

How did the uncertainty principle influence thinking about the arrangement of electrons in atoms?

pishuonlain [190]

Answer:

The correct answer is option C

Explanation:

According to Heisenberg's principle "At the instant of time when the position is determined, that is, at the instant when the photon is scattered by the electron, the electron undergoes a discontinuous change in momentum. This change is the greater the smaller the wavelength of the light employed, i.e., the more exact the determination of the position. At the instant at which the position of the electron is known, its momentum therefore can be known only up to magnitudes which correspond to that discontinuous change; thus, the more precisely the position is determined, the less precisely the momentum is known".

Hence, this principle made scientists to realize that electrons could not be located in defined orbits which a contradictory of Bohr's model.

3 0

3 years ago

ANYONE HELP ME IN CHEMISTRY:( JUST THE NAME AND SYMBOL ANYONE WHO CAN HELP ME:(

lana [24]

Answer:

Hydrogen: H, Helium: He, Carbon: C

Nitrogen: N, Oxygen: O, Fluorine: F

Neon: Ne, Sodium: Na, Magnesium: Mg

Aluminum: Al, Silicon: Si, Phosphorus: P

Chlorine: Cl, Selenium: Se, Silver: Ag

Titanium: Ti, Beryllium: Be, Lithium: Li

Uranium: U, Nickel: Ni , Copper: Cu

Bromine: Br, Cadmium: Cd, Zinc: Zn

Cobalt: Co, Gallium: Ga, Germanium: Ge

Iron: Fe, Krypton: Kr, Potassium: K

Calcium: Ca, Chromium: Cr, Manganese: Mn

Scandium: Sc, Tin: Sn, Vanadium: V

Platinum: Pt, Boron: B, Au: Gold

7 0

3 years ago

In titrating 0.20 M hydrochloric acid, HCl, with 0.20 M NaOH at 25°C, the solution at the equivalence point is

xxTIMURxx [149]

Answer:

c) 0.10M NaCl

Explanation:

Options are:

a) 0.20M NaCl

b) Very acidic

c) 0.10M NaCl

d) 0.10M HCl + 0.20M NaOH

e) Slightly acidic.

Based on the reaction:

NaOH + HCl → H₂O + NaCl

You can see than 1 mole of NaOH reacts per mole of HCl producing 1 mole of NaCl

Assuming 1L of 0.20M HCl reacts with 1L of NaOH, moles of both compounds are:

1L * 0.20mol/L = 0.20 moles reacts. That means moles of NaCl produced are 0.20moles in 2L. Molarity of NaCl is:

0.20mol / 2L = 0.10M NaCl

That means, right option is:

8 0

3 years ago

Some freshwater reservoir

olya-2409 [2.1K]

what is full answer I sont get it

8 0

3 years ago