Rick runs 100 feet in 20 seconds what's his speed?

Consider the model of a sodium atom. Which feature does the model show accurately?

Is H1 + An atom or an ion

Which processes represent one chemical change and one physical change? (1) freezing and melting (2) freezing and vaporization (3) decomposition and melting (4) decomposition and combustion

What is a simple circuit and a parallel circuit

Neutral atoms of a specific element can have different numbers of which?

Which statement correspond to a cellular respiration

A tire is filled to a gauge pressure of 2 atm at 27 degrees Celsius after a drive the temperature within the tire rises to 47 degrees celsius. What is the pressure within the tire now

What mass, in grams, of fluorine has (F2) is contained in a 10.3-liter tank at 29.8 degrees Celsius and 1.23 atmospheres? Show all of the work used to solve this problem.

What is the empirical formula of a substance that contains 2.64g of C, 0.444g H and 3.52g of O

Which of the following is a step in the conversion of 2.5 hm3 to L? fraction cubed: one cm over ten to the second power m fraction cubed: one hm over ten to the negative 2 power m ten to the negative third power L over 1 mL fraction cubed: one ml