How does the modern Periodic Table of the Elements differ form Mendeleyev's chart?

A 0.08541 g sample of gas occupies 10.0-ml at 288.5 k and 1.10 atm. upon further analysis, the compound is found to be 13.068% c and 86.932% br. what is the molecular formula of the compound? (order: c, x)

Beryllium chlorite is formed when a beryllium cation with charge 2 + combines with a chlorite ion with charge 1-. How will you derive the formula for beryllium chlorite?

Geologic evidence shows that Earth's tectonic plates can move thousands of kilometers across the Earth's surface. These movements A. do not change the Earth's surface at all. B. occur gradually over millions of years. C. occur due to human activity.

If the temperature of water increases as you heat it, the temperature is the independent variable. True False

P4O10 + 6PCl5 → 10POCl3 To calculate how many grams POCl3 will be formed from 5.0 g PCl5, you need A) to know if the product is a gas. B) to know whether either reactant is a gas. C) information about the mass of P4O10 reacting.

Since the early 2000s, careers in the field of genetics have grown at a rapid pace. Which of these is a probable cause for this explosion of available and expanding jobs?

How many litres of 0.215 m NaCl contains 4.30 mol of this salt? Assume this solvent is H2O I'm confused on this question because little m is molality but when I looked this up on google, someone solved the problem assuming it was molarity

How can a neutral atom become a positively-charged particle?

The last column of the periodic table contains the noble gases, elements that do not easily form chemical bonds.

When pollution is removed from the air by a natural process, it