Which system of measurement does the U. S. use?

Which phrase describes an abiotic factor? A. fish in a pond B. bacteria on the skin C. air temperature D. number of species on a seashore

Which of the following is a chemical change A melting ice B boiling water C a burning candle or D Frost forming inside of freezer

Describe the formation of an ionic compound.

Which bond or interaction would be difficult to disrupt when the compounds are placed in water?

Harmoney Rus. Test / 7 of 40 The alkali metal family of elements includes Li, Na, K, and Rb. These elements tend to easily form compounds with the halogens F, CI, Br, and L.

A 75.00 g a sample of a substance is analyzed and found to consist of 32.73 g phosphorus and 42.7 g oxygen. calculate the percent composition of this substance.

Which one of the following melts the fastest: rectangular prism, cylinder, and rectangular trapezoidal trough?

A 1.8-mL volume of seawater contains about 4.0 * 10^-10 g of gold. The total volume of ocean water is about 1.5 * 10^21 L. Calculate the total worth of all the gold in the world's oceans if the price of gold is $19.

Why are numbers placed before the elements and molecules in a chemical equation?

Which of these pairs of elements have the same number of valence electrons? oxygen (O) and bromine (Br) selenium (Se) and bromine (Br) carbon (C) and lead (Pb) oxygen (O) and carbon (C) sodium (Na) and magnesium (Mg)