An Atom's mass number is 210 and its atomic number is 85. How many neutrons does the atom have?

a. 85

b. 125

c. 210

d. 295

An 18.5 g sample of tin (molar mass = 118.7) combines with 10.0 g sulfur (molar mass = 32.07) to form a compound. What is the empirical formula of this compound? (A) SnS (B) Sns2 (C) Sn2s (D) Sn2s3

Removing salt from water would decrease its what

A 3.0-l sample of helium was placed in a container fitted with a porous membrane. half of the helium effused through the membrane in 24 hours. a 3.0-l sample of oxygen was placed in an identical container.

Melanie has developed a strategy to achieve the company's goals. Regardless of how good this is for the company, she can't get the employees to buy in to make the strategy successful. What should Melanie do?

Does atomic radius increase or decrease as you go down a group/family on periodic table?

100 level student of the adamawa state university mubi was ask to synthesize ammonia (haber process) in the ratio 3:1 of hydrogen to nitrogen. durin the synthesize, 6.00 mole of nitrogen, 4.20 mole of hydrogen and 0.

Na + leaks through neuron membranes faster than k + because of the properties of the non-gated leak channels. na + leaks through neuron membranes faster than k + because of the properties of the non-gated leak channels. a. True b. False

How many protons does one atom of sulfur have

Which shows the electron configuration for zinc (Zn) ? [Kr]5s24d10 [Kr]5s24d6 [Ar]4s23d9 [Ar]4s23d10

What is the oxidation number of chromium in the ionic compound ammonium dichromate (nh4) 2cr2o7?