Which trait is found in early embryos of both birds and humans, but then disappears from each during development?

g The labels have fallen off three bottles containing powdered samples of metals; one contains zinc, one lead, and the other platinum. You have three solutions at your disposal: 1 MM sodium nitrate, 1 MM nitric acid, and 1 MM nickel nitrate.

Is pancakes cooking on a griddle a physical or chemical change?

Iron, an important component of the steel used in the construction of buildings, bridges, and railroads, combines with oxygen to form fe2o3, which we recognize as rust. at room temperature, iron

When would a measurement be both accurate and precise? (A) he measurement can be replicated (B) the measurement is around the accepted value (C) the measurement is close to the accepted value and can be reproduced (D) a reliable instrument was used

How to solve the number of mol

4fe (s) + 3o2 (g) →2fe2o3 (s) how many grams of Fe2O3 are produced when 12.0 of iron rusts

Chromium 6 is commonly referred to as?

How does a parallel circuit differ from a series circuit? A. A parallel circuit had one path for electrons, but a series circuit has more then one path. B. A series circuit has one path for electrons, but a parallel circuit has more then one path. C.

Which of the following is an example of potential energy? -none of the above -A person jumping on a trampoline -a book on the shelf -A person running in place

One atom of silicon can properly be combined in a compound with a. three atoms of hydrogen. b. four atoms of calcium. c. two atoms of oxygen. d. one atom of chlorine.