Combining a base and an acid forms

A. DNA and gas.

B. sodium hydroxide.

C. salt and water.

D. ions.

C. Salt and Water

Explanation:

The reaction between an acid and a base will have salt and water as its end product. This process is known " Neutralization  Reaction".

HCl    +                   NaOH         >            NaCl       +           H2O

Hydrochloric          Sodium                                  Sodium                Water

Acid                     Hydroxide (base)                   Chloride(Salt)                            

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.