How many protons does an element have if it has an atomic number of 12? square 6 12 25

Which of the following is an example of a physical change? grinding coffee beans baking cake converting water to hydrogen and oxygen digesting a cheeseburger

Write the ground state electron configuration of Zn using the noble -gas shorthand notation. electron configuration: $\square $

Which of the following common household items is generally considered to be acidic? Soap Vinegar (acetic acid solution) Baking soda (sodium bicarbonate)

Which of the following must be present in a Bronsted-Lowry acid? An OH group A hydrogen atom A chlorine atom A nonbonding electron pair

Which is a test for the presence of an aldehyde? Silver's reagent boiling point determination Benedict's reagent a color change at boiling point

One cup of kidney beans contains 15 g of protein, 1g of fat, and 428 of carbohydrate. How many kilocalories, to two significant figures, does this sample contain? (The caloric values are: 4 $kcal/g$ for carbohydrate, $9kcal/g$ for fat, and $4kcal/g$ for protein.) 240 kcal 230 kcal 520 kcal 88 kcal

For each of the following gemstones determine the mass of compound present in the given moles of each compound. The chemical formula for emeral I is $Be_{3}Al_{2}(SiO_{3})_{6}$ What is the mass in grams of emerald that is in 0.0173 moles?

How many molecule of sugar (sucrose) are there in 5 g (one teaspoon) sugar? Chemical foluma of sugar: $C_{12}H_{22}O_{11}$

Which statement is false regarding BPA? is used in resin lining of metal cans is only dangerous in warmer climates affects the brain and prostate development in fetuses, infants and children is found in food storage box and water bottles

Identify the noble gas in the following list. helium hydrogen oxygen gold