A physical reaction is a process in which one or more reactants change into one or more products with different properties. true or false

An atom of an element with two valence electrons reacts with two atoms of an element with atomic number 17 to form an ionic compound. what is the compound most likely formed as described?

Spacecrafts have landed on the surface of which planet? Saturn Mars Venus Jupiter

2. A car traveling at 32m/s slams on the brakes after noticing an obstacle ahead. The car slows down at a constant rate before coming to a stop 4.2 seconds later. How far did the car travel in the 4.2 seconds it took to stop? a. 7.6 m b. 67.2 m C.

Explain earths position in the solar system and describe its closet neighbors.

A skateboarder has an acceleration of - 1.9 m/s2. If her initial speed is 6 m/s, how long does it take her to stop?

Suppose you place a ball in the middle of a wagon, and then accelerate the wagon forward. Describe the motion of the ball relative to the ground. - Describe its motion relative to the wagon.

Water is poured into a container that has a leak. The mass 'm' of the water is given as a function of time 't' by, m=5t^0.8 - 3t + 20, with t>=0, mass in grams and t in seconds a. at what time is the water mass greatest, and b.

Determine the mechanical energy of this object: a 1-kg ball sits on a 10-meter high cliff. A. The ball isn't moving, so the mechanical energy is zero B. 10 J C. 98 J D.

A proton that has a mass m and is moving at + 164 m/s undergoes a head-on elastic collision with a stationary carbon nucleus of mass 12m. the velocity of the proton after the collision is answer

what is the mass number in atomic mass units of an atom with 14 protons, 14 electrons, and 16 neutrons