What is instantaneous acceleration? a. how fast a speed is changing at a specific instant b. how fast a velocity is changing at a specific instant c. how fast a direction is changing at a specific instant d. all of the above

Will mark brainliest26. which of these statements are true? (3 points)a. gases are compressibleb. gases fill their containers completelyc. the pressure of a gas is independent of the temperatured. gases have masse. gases exert pressuref. the pressure of a gas is dependent on the volumeg. gas pressure results from the collisions between gas particlesh. gases have a definite volume and shape

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?