Kendra conducts an experiment. She mixes two chemicals, resulting in a chemical reaction. Based on Kendra's experiment, what can be concluded about the original matter before mixing?

A cell membrane of living cells is formed by a double layer of phospholipids. Which is true about the head and tails of the individual phospholipids? a. The tails are hydrophilic and the head is hydrophobic. b.

How can a ringing telephone can be heard through a closed door

If the mass of one mole of hydrogen is 1.01 grams; phosphorus, 30.97 grams; and oxygen, 16.0 grams, what is the molar mass of phosphoric acid (HÀPOÁ) ?

What is the chemical formula for hydrochloric acid?

A student checks the air in her bicycle tires early in the morning when it is cool outside. If she measures it again later in the day when it is hotter outside, what will she most likely observe?

What are some observable indications that a chemical reaction has occurred?

Which of the following correctly represents the mole ratio between NaOH and FeCl3? 3 NaOH + FeCl3 → 3 NaCl + Fe (OH) 3 A. 1 mol NaOH: 1 mol FeCl3 B. 3 mol NaOH: 3 mol FeCl3 C. 1 mol NaOH: 3 mol FeCl3 D. 3 mol NaOH: 1 mol FeCl3

Is it possible for the overall charge of an ionic compound to be - 1. true false

Light is not a wave because it does not need a medium. t or f

Two liquids are known to be miscible. They are placed in a beaker and shaken. Which of the following describes what will happen? The liquids will eventually separate into two layers. The liquids form a solution.