Please I need the answer, very urgent Calculate the PH of the solution obtained if 40 cm3 of 0.2 M HCl was added to 30 cm3 of 0.1 M NaOH​

Select the correct answer. you have a nightlight plugged into an outlet in the hallway, which uses 3.5 watts when plugged in. if the house circuit provides 120.0 volts, what is the current through this bulb?

Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

0.66y = 0.9x + 0.48 if y has a value of 108.45 what is the value of x?