Which of the following measurements is expressed to three significant figures?

A. 0.0006 m

B. 6066 mg

C. 6.40 * 10-7 km

D. 0.060 mm

Which one of the following groups consists of one mixture, one element and one compound? 1. Aluminium, water and nitrogen gas 2. Aluminium, steel and air 3. Air, water and iron oxide 4. Calcium, soil and sodium chloride

Which is true about subatomic particles? A. Protons, neutrons, and electrons are the only subatomic particles. B. Subatomic particles are larger than atoms. C. All subatomic particles must have electrical charge. D.

What is the major cause of the Earth's magnetic field? magnetic materials on the Earth's surface charged particles from the sun the Earth's magnetic lithosphere the Earth's liquid outer core

How are linear, trigonal planar, and bent molecular shapes similar? How are they different?

In which range of time do earthquakes occur? A. seconds B. days C. months D. millions of years

The dissolution of barium hydroxide in water is an exothermic process. Which of the following statements is correct? A) The enthalpy of solid barium hydroxide plus pure water is less than that of the solution, at the same temperature.

What's the Compound for CO?

How to measure a bag of flour

If the pH of a wine is too high, say, 4.0 or above, the wine becomes unstable and has a flat taste. (a) A certain California red wine has a pH of 3.5, and a certain Italian white wine has a pH of 2.9.

Sodium hydroxide reacts with carbon dioxide as follows: which is the limiting reactant when 1.85 mol naoh and 1.