in this trial, 0.400 M NaOH was added to 40.00 ml of 0.400 M HCl. How many ml of base must be added to cause the colour to change?

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?