Which of the following is not a chemical that can be created by chemists?

O

A. Plastic

O

B. Helium

O

C. Sodium

O

D. Gasoline

Why is the law of gravity an example of a universal law? A) gravity is the attraction of any mass to any other other mass.

La energia cinetica de una masa de 6kg que poses una velocidad de 10m7 / la energia cinetica de una masa de 6kg que posee una velocidad de 15m/s como lo puedo desarrollar

Why are tropical moist forests often less suited for agriculture and human occupation than tropical deciduous forests?

Why are aerosol cans cool (the can itself) ?

What characteristic of an atom determines its properties A. arrangement of protons in the nucleus B. the arrangement of electrons around the nucleus C. the atomic number of neutrons D. the atomic mass

A team of dogs is pulling a sled with a net force of 2000 N. The sled is accelerating a 2.2 m/s^2. What is the mass of the sled?

Is the reduction of copper from copper (ii) oxide by carbon exothermic or endothermic? what is the sign of the energy change?

True or false we have mucus that covers are stomach which prevents or stomach acid from digesting or stomach

a man applies a force of 100n to a rock for 60 seconds but the rock does not move what is the amount of work done by the man on the rock

The driver of a car traveling at 32 m/s applies the brakes and undergoes a constant deceleration of 2.25 m/s^2.