Why is burning wood a chemical change? The wood can still be seen It evaporates easily It becomes a new substance with different properties It creates a solution

Identify the semi-solid solution. Mayonnaise Saltwater Brass Air

Why is saltwater a homogeneous mixture? Because salt floats Because the salt forms a compound Because it is uniform and components are not easily distinguished Because it is a gas

What are the properties of gases? No fixed shape and fixed volume No fixed shape and volume Fixed shape and fixed volume Fixed shape and no fixed volume

A student uses 0.507 kilograms of lead (II)fluorosilicate, PbSiF_(6) to make a 3.75L solution of aqueous lead (I) fluorosilicate . Determine the concentration . of the solution . Round your answer to three significant figures. Include the unit in your answer. Answer: square

Which of the following correctly describes the formula weight of a compound? The sum of the atomic numbers in the compound The sum of the charges of the ions in a compound The number of formula units in a sample of a compound The sum of the atomic masses of all the elements in one formula unit compound

Explain what characteristics of metalloids are more like metals and which are more like nonmetals based on the research you conducted Edit View Insert Format Tools Table

__ 9. Which combination of protons and electrons would have a negative 3 charge? A. 15 protons and 18 electrons B. 18 protons and 15 electrons C. 26 protons and 23 electrons D. 25 protons and 26 electrons E. 10 protons and 10 electrons

Calculate the molar mass of N_(2)S_(3) Round your answer to the hundredths place. square (g)/(mol) of N_(2)S_(3)

The kinetic molecular theory of gases suggests that gas particles exert __ attractive or repulsive forces on each other. square

Hot Questions

When you balance the Separate Water simulation how many individual oxygen atoms do you need on the products side to complete the balanced equation? 1 2 3 4

Determine which type of property each statement describes by typing "physical or "chemical" in the blank. Hydrogen is a colorless tasteless, and odorless gas. $\square $ Hydrogen is very combustible in the presence of oxygen. $\square $ Hydrogen is very reactive with most elements. $\square $ Hydrogen is the least dense of all elements. $\square $

Which of the following is an empirical formula? $C_{3}H_{6}$ $C_{3}H_{8}$ CH $C_{2}H_{4}$

Which of the following has the most mass per mole? Oxygen Nitrogen Carbon Potassium

What is the electron configuration for oxygen, O? $1s^{2}2s^{2}2p^{3}$ $1s^{2}2s^{2}2p^{6}3s^{2}$ $1s^{2}2s^{2}2p^{4}$ $1s^{2}2s^{2}2p^{6}3s^{2}$

Gasoline, paints, thinners solvents, natural gas acetylene are all examples of potential: A. Toxic hazards. B. Flammable hazards. C. Combustible hazards. D. All of the above. E. None of the above.

Trans fats and partially hydrogenated oils are the same thing. False True

Is this compound ionic or covalent? $NO_{2}$ ionic covalent

(b) $H_{3}C-CH-CH_{2}-CH_{2}-CH_{3}\\ H_{2}C-CH_{3}$ 2-Ethylpentane Spell out the full name of the compound. The correct name is $\square $

Question 2 (Multiple Choice Worln 2 Points) (05.01 LC) Which of the following groups have seven valence electrons and are very reactive? Column 1 alkali metals Column 2 alkaline earth metals Column 17 halogens Column 18 noble gases