One of the following is correctly termed a substance, and the others are mixtures. The substance is

a. fruit punch.

b. amber gemstones.

c. clam chowder.

d. copper.

When does cortisol get release by the body?

You look in the refrigerator and find some orange drink you had forgotten was there. the drink now has an "off" taste and bubbles. what is the most likely explanation for the changes in the drink? explain the process

Describe each of the following as a physical or chemical property. 1. Apple slices turn brown when exposed to air. 2. At room temperature, mercury is a liquid. 3. Phosphorus will ignite when exposed to air. 4.

What scientist uses a metric ruler

Bases are commonly used as cleaning products because they can dissolve grease. true false

Ammonia (NH3) burns in air to form nitrogen dioxide and water. Calculate grams of nitrogen dioxide produced if 4.0 grams of ammonia are consumed

What year did mendeleev organized his periodic table in order of increasing atomic number

What is the volume of 1.9 moles of chlorine gas (Cl2) at standard temperature and pressure (STP) ? 12 L 22.4 L 43 L 81 L

This decomposition is first order with respect to phosphine, and has a half‑life of 35.0 s at 953 K. Calculate the partial pressure of hydrogen gas that is present after 70.5 s if a 2.20 L vessel containing 2.

A new element has two isotopes, one with a mass of 40.0 amu and the other with a mass of 42.0 amu. the atomic weight is 40.50 g/mol. pick the true statement a. the isotope at 42.0 amu is less abundant b. the element has 19 protons and 21 neutrons c.