If I am in a Ferrari and I travelled for 3 hours at a speed of 270 km/h. How far did I travel? Use the following formula:
distance velocity x time

a)810km

b)90km

c)810km/hr

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

Which of the following are guidelines to follow for obtaining accurate observations

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.