Why do need thermometer, thermistors and other devices for measuring temperature

Whats negative three and one third times negative two and two fifths

An element's atomic number is 86. How many protons would an atom of this element have

How would you classify salt water? a. pure substance-element b. mixture-heterogeneous c. pure substance-compound d. mixture-homogeneous e. none of the above

What hybridization is required for central atoms that have a tetrahedral arrangement of electron pairs? A trigo - nal planar arrangement of electron pairs? A linear ar - rangement of electron pairs?

How many hydrogen atoms are missing in ethane compared to ethane

Which law is known as the law of action-reaction

7. A 2.0 L container had 0.40 mol of He (g) and 0.60 mol of Ar (g) at 25°C. Which gas has a greater average kinetic energy? Which gas is traveling at a higher average speed? If Ar has an average speed of 431 m/s, what is the average speed of He?

Which of the following will allow more solute to be dissolved in a solvent? Choose all that apply. * Adding more solute Cooling the solution Agitating the solution Adding heat Using larger crystals

Calculate the average bond order for a p-o bond (such as the one shown in blue) in a phosphate ion.

Match the vocabulary terms to their definitions. 1. standard metric unit of length mass 2. a proposed explanation for a scientific problem hypothesis 3. standard unit of volume liter 4. the curved top surface of a liquid column control 5.