How many moles of oxygen atoms are in 2.50 mol of kmno4

Radioactive gold-198 is used in the diagnosis of liver problems. the half-life of this isotope is 2.7 days. if you begin with a sample of 8.1 mg of the isotope, how much of this sample remains after 2.6 days?

Which of the following best describes what causes water molecules to exhibit properties such as cohesive and adhesive behavior? A. Water molecules are polar, having partially positive and partially negative ends. B.

1. How many atoms are in a water molecule? 2. Describe the structure of a water molecule. 3. How do water molecules form droplets of water? 4. Why is water called the universal solvent? 5. Explain how NaCI or table salt dissolves in water?

What could you determine about a gold necklace that bubbles when exposed to an acid?

A 50 L cylinder is filled with argon gas to a pressure of 10130.0 kPa at 300°C. How many moles of argon gas does the cylinder contain? (Given: R = 8.314 L∙kPa/K∙mol) 2519.142 mol

What mass of H2SO4 is contained in 60.00 mL of a 5.85 M solution of sulfuric acid

One isotope has 6 protons and 8 neutrons which reference names this isotope

When an atom that has no charge loses two electrons, it becomes a: A: positive ion. B: negative ion. C: positive isotope. D: negative isotope.

A 155.0 9 piece of copper at 182 °C Is dropped into 2500 g of water at 23.9 °C. (The specific heat of copper is 0.385 1/9°C.) Calculate the final temperature of the mixture. (Assume no heat loss to the surroundings.)

Which state of matter is characterized by having an indefinite shape, but a definite volume? Gas Liquid Solid None of the above