Which statement correctly describes a chemical reaction? Energy is always released. Bonds between atoms break and reform. Products go into a reaction. Reactants come out of a reaction.

13. What properties of solids distinguish them from liquids and gases? heterogeneous mixture? 14. What great scientific principle is demonstrated every time there is a chemical reaction? 15. List some instances in which God chose to overrule the natural order by creating or destroying matter to fulfill his purposes. 16. The addition or removal of what quantity can change the temperature of an object? 17. For a given substance under constant air pressure,what generalization can you make about the relative temperatures of its solid, liquid, and gaseous states? 18. What property of a substance besides its temperature affects its rate of vaporization? 19. What vaporization process occurs at temperatures below the freezing point of a solid?

9. What is the mass percent of Platinum in platinum (II) chloride? (10 pts.)

Which characteristic is given by the principal quantum number orbital size orbital mass orbital shape orbital orientation

Which of the following laws is included in the combined gas law? Boyle's law Charles's law Gay-Lussac's law All of the choices

What are the four components required to make a fire possible? A Oxygen, wood, plastic, and a chemical chain reaction B Fuel, heat, spark, and a fire tetrahedron C Ignition, oxygen, air, and contact with a heat source D Oxygen, heat, fuel, and a chemical chain reaction

If flammable liquids are on fire, which class of fire extinguisher would you need to put out the fire? A Class B B Class C C Class D D Both B and C

How many lone pairs must an atom possess to have trigonal pyramidal molecular structure? Select the correct answer below: l 2 3

What is the formula for hydrochloric acid? HCIO HCI HCOH HC_(2)H_(3)O_(2)

How many moles of NaOH are needed to neutralize 15.0 mL of 0.235 M HCl solution? Hints: Don't forget to write the equation, balance it, and make sure units of volume are consistant 0.00353 moles 35.3 moles 0.235 moles 3.53 moles 23.5 moles 2.35 moles

Hot Questions

Intermolecular forces hold atoms and molecules in place in a solid. True False

What did Boyle discover about fire? It transforms one chemical into another. It creates good conditions for chemical experiments. It needs air to exist. Its temperature is determined by the substances being burned.

Outer electrons are referred to as __ electrons. scatter free roaming target

Phosphorus reacts with iodine as shown in the chemical reaction below.What is the percent yield of the reaction if 28.2 g $Pl_{3}$ is obtained from the reaction of 48.0 g of 12 with excess phosphorus? $2P(s)+3I_{2}(s)\rightarrow 2PI_{3}(s)$ 51.7 g 51.48 51.5 g None of the above 51.98

Select the pair that has the larger atom or ion listed first. $Br^{-},Se^{2-}$ $S,S^{2-}$ $Cl,Cl^{-}$ $F^{-},Ne$ $P,P^{3-}$

What information do you need to look at on the SDS? There is 1 correct answer. Look at Section 2 - Hazards Look at Section 3 Composition / Information on Ingredients Look at Section 4 - First Aid Measures Look at Section 5 - Fire-Fighting Measures Look at Section 6 - Accidental Release Measures

Breaking bonds is hydrolysis. is dehydration synthesis. stores energy. is endergonic.

Which statements are true regarding reaction rates'[Select all that apply.] Larger activation energies are associated with faster reaction rates. Higher reactant concentrations are associated with faster reaction rates. Reducing the activation energy for a reaction increases its reaction rate. Reaction rates depend on how likely molecules are to collide in the correct orientation to react. Reactions that give off heat occur rapidly. Reactions that absorb heat occur rapidly. Large changes in enthalpy are associated with fast reaction rates. At high temperatures molecules are more likely to collide with enough energy to initiate a reaction. Two molecules must collide with one another to react.

If 5.00 g of gray iron powder reacts with 2.38 g of red phosphorus powder, what is the mass of the iron phosphide product? $\square $

How many oxygen molecules do we need to produce four molecules of water? a) 4 b) 2 C) 3 d) 1