// high points/brainiest

a gas of 19 ml at a pressure of 740 mmhg can be expected to change its pressure when its volume changes to 30. ml. express its new pressure in units of atmospheres.

a. 0.61 atm
b. 1.5 atm
c. 470 atm
d. 590 atm

To solve this we assume

that the gas is an ideal gas. Then, we can use the ideal gas equation which is

expressed as PV = nRT. At a constant temperature and number of moles of the gas

the product of PV is equal to some constant. At another set of condition of

temperature, the constant is still the same. Calculations are as follows:

P1V1 =P2V2

P2 = P1V1/V2

P2 = 740mmhg x 19 mL / 30 mL

P2 = 468.67 mmHg = 0.62 atm

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .