Can just one measurement be considered precise? Can just one measurement be considered accurate?

Classify the following compounds as having covalent or ionic bondsa. dinitrogen trioxideb. carbon dioxidec. calcium chlorided. magnesium nitridee. sodium bromidef. aluminum oxide

The attraction of positive and negative charges is a a. physical bond c. chemical bond b. electron bond d. negative bond

How would you measure the pH of a coloured substance such as red ink. why?

Why is elemental zinc considered a pure substance?

A 30-g car rolls from a hill 12 cm high and is traveling at 154 cm/s as it travels along a 275 cm horizontal track. What is the momentum of the car? A. 360 g⋅cm B. 1848 cm2/s C. 4620 g⋅cm/s D. 8250 g⋅cm

In which one of the following solutions is silver chloride themost soluble? A. 0.744 M LiNO3 B. 0.0176 M NH3 C. 0.181 M HCl D. 0.181 M NaCl E. pure water

A 5.701 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 12.28 grams of CO2 and 5.029 grams of H2O are produced. In a separate experiment, the molar mass is found to be 102.1 g/mol.

One amu is equal to the mass of an electron the mass of one proton or one electron the mass of one neutron or one electron the mass of one neutron or one proton

Given an unknown mixture consisting of two more substances, explain how could you determine whether that mixture is a true solution, a colloid or a suspension

Which isotope of lithium has 3 neutrons?