Which of the following is an example of a metal ore?

a. natural gas

b. nickel

c. oil

d. timber

What natural method of separating mixtures happens in reservoirs over a long period of time?

Allicin (C6H10OS2) contains 59.9 g of carbon, 21.7 g of hydrogen, 24.4 g of oxygen, and sulfur. What is the mass percent of sulfur in a 162 g sample of the compound?

If the following elements were to form ions, they would attain the same number of electrons as which noble gas? elements: As, S, Na, Rb noble gas: He, Ne, Ar, Kr

A scientific law A. cannot be questioned B. cannot be understood C. cannot be discovered D. cannot be broken

Which of the following contains the smallest amount of matter? A. 25 g B. 2.5 hg C. 2,500 dg D. 0.25 kg

A covalent chemical bond is one in which outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms. protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms.

To break a chemical bond, energy must be (1) absorbed (2) destroyed (3) produced (4) released

In an experiment, 132 grams of potassium bromide (KNO3) was dissolved in 100 grams of water at 70 °C in 1 minute.

Would an ice cube melts faster when you put food coloring on it

Use the following half-reactions to design a voltaic cell: Sn4 + (aq) + 2 e - → Sn2 + (aq) Eo = 0.15 V Ag + (aq) + e-→ Ag (s) Eo = 0.80 V What is the overall cell potential? Group of answer choices