If a gas at a pressure of 1.0 atm and a temperature of 22.0 °C occupies 0.50 L, what volume will it occupy if the pressure and temperature are raised to 2.0 atm and 25.0 °C? (Hint: 0.10-0.40 L)

What must happen before a body cell can begin mitotic cell division

Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]

Why is it incorrect to balance a chemical equation by changing the subscripts? explain.