Hich of the following equations is balanced correctly?

A.

2 C2H2 + 5 O2 → 4 CO2 + 2 H2O

B.

3 H2O → H2 + 3 O2

C.

2 C3H3 + O2 → 2 CO2 + H2O

D.

Cl2 + 2 KBr → KCl + Br2

What is the difference between condensation and precipitation

Which of the fallowing is a chemical change? A. Rocks being smoothed by rapid water movement. B. The pink color of a rose. C. Iron's attraction to a magnet. D. Decomposition of stone due to acid rain.

The bottom of a box has a surface area of 58.8 cm2. The mass of the box is 12.0 kg. Acceleration due to gravity at sea level is 9.80 m/s2. What is the pressure exerted by the box where it rests? 2.00 Pa 72.0 Pa 2.00 x 10^4 Pa 0.500 Pa

Why do astronomers find it difficult to detect individual exoplanets?

What is the refractive index of a medium?

2. How is temperature related to kinetic energy?

As stream velocity decrease, which factor will likely increase? A) erosion of the stream bank B) deposition of material in the stream C) amount of material carried downstream D) size of the particles carried downstream

What cells in the nervous signals travel through the nervous system

A mechanic pushes a 3.60 ✕ 103-kg car from rest to a speed of v, doing 5,130 j of work in the process. during this time, the car moves 21.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.

Anika asks Eva to roll a basketball and then a bowling ball to her. Which requires more force to roll, and why?