A sample of Strontium-90 is found to have decayed to one-fourth of its original amount after 58.2 years. What is the half-life of strontium-90?

A 1 mol sample of gas has a temperature of 225K, a volume of 3.3L, and a pressure of 500 torr. What would the temperature be if the amount of gas remains constant while pressure dropped to 210 torr, and the volume dropped to 2.75L?

498calories equals how many kJ

Which of these is NOT a function of the digestive system? A. Breaks down your food B. Absorbs vitamins and minerals from your food C. Turns your food into energy you can use D. Protects your organs

Identify the highlighted secondary lymphatic tissue located on the lateral wall of the oropharynx just inferior to the soft palate

What is the term for a bond composed of two electron pairs shared between two atoms? double bond triple bond electrovalent bond single bond none of the above?

How is the partial pressure of a gas in a mixture calculated?

Part II. Formulas From Names Write the chemical formula of the covalent compounds below. 11. Carbon dioxide CO2

Spell out the full name of the compound Cl2O7

True or False. When covalent bonds are formed between atoms having different electronegativities, the electrons tend to spend less time at the atom with the greater electronegativity. Such chemical bonds are called polar covalent bonds.

How many protons are in an element