What is the meaning of radioactive substance

Which process was responsible for producing gases in the early atmosphere?

Determine the element symbol, number of protons, and number of electrons for an ion that has a mass number of 56, 30 neutrons, and a charge of + 3.

If you are diving and playing in the waves near a beach and suddenly find that you are being pulled out into the ocean at a relatively quick pace, what current are you most likely trapped in?

Describe the density of cold water with a high salinity compared to that of warm water with low salinity. Explain your reasoning

Consider the combustion of ethane gas, C2H6. In the balanced chemical equation, what are the lowest, whole number coefficients? Match the number to the species.

In an analysis of interhalogen reactivity, 0.440 mol of ICl was placed in a 5.00-L flask, where it decomposed at a high T: 2 ICl (g) ⇌ I2 (g) + Cl2 (g) Calculate the equilibrium concentrations of I2, Cl2, and ICl (Kc = 0.110 at this temperature).

Find the molar mass of vitamin A (C20H30O).

9.00 g/h to kilograms per minute

Determine an empirical formula from each set of percent composition data. 1. 18.27% K, 59.30% I, 22.43% 0

What are the controlled, independent, and dependent variables of this experiment? The experiment is to drop 2 drops of food coloring in one glass of hot water, and one of cold water to see which has the faster rate of diffusion.