Which of the following will cause an increase in the rate of a chemical reaction? A decreasing the concentration of the reactants B decreasing the temperature of the reaction C increasing the volume of the reactants D increasing the temperature of the reaction

What substance is made when hydrogen burns? Water Oxygen Ethanol Carbon dioxide

2 To effectively apply an extinguishing agent, you need all BUT the following: Volume Pressure Direction Electricity

Which type of chemical reaction involves combining two or more substances to form o new compound? Combustion Synthesis Double Replacement Decomposition

What happens when ionic compounds dissolve in water? a) They stick to the wall of the beaker b) Cations and anions are released into the solution c) They are transformed into non-metals d) They split up H_(2)O molecules into Hand

QUESTION 1 OF 10 An ionic bond is most accurately described as forming through: The sharing of electron pairs between two nonmetal atoms. The transfer of electrons from one atom (typically a metal) to another atom (typically a nonmetall, resulting in oppositely charged ions. The delocalization of electrons among many metal atoms.

3. Which substance has a chemical symbol that is derived from a Latin name? hydrogen calcium oxygen potassium

Select the correct answer. What causes hydrogen bonds to rupture in ice? A. Increase in the temperature of water B. Decrease in the temperature of water C. Increase in the temperature of ice D. Decrease in the temperature of ice

Ix Ionic compounds __ in water. A dissociate B dissolve C ionize

15) What occurs when two atoms of bromine react to form a molecule of bromine? A) A bond is broken as energy is released B) A bond is broken as energy is absorbed. C) A bond is formed as energy is released. D) A bond is formed as energy is absorbed.

Hot Questions

Before you go, which type of molecule would you choose to be the anode in a lithium battery? a) The metal with the most negative potential b) It does not matter since lithium's potential is so negative c) The metal with the most positive potential d) Another lithium compound

Part I: Unit Conversions.Show all work (known and unknown, and dimensional analysis - including units! Write your answers in the boxes provided. Unit Test: Dimensional Analysis and Mole Convers 1. Find the number of minutes in 25 years, assuming that $1year=365days$ K:25 years 2. The driving distance from Spokane to Seattle is 479,000 meters. Convert this distance to miles given $1m=100cm,1in=2.54cm,12in=1ft,$ and $1mi=5280ft$ $\square $ Part II: Mole Conversions . Show all work (known and unknown, and dimensional analysis - including units! Write your answers in the boxes provided. 3. A sample contains $9.2\times 10^{22}$ atoms of beryllium (Be)How many moles is this? $\square $ 4. The formula for Aluminum Carbonate is $Al_{2}(CO_{3})_{3}$ What is the molar mass of aluminum carbonate? $\square $

The following reaction is an example of a substitution reaction. $2Na+Cl_{2}\rightarrow 2NaCl$ TRUE FALSE

Heterogeneous mixtures are observed to be uniform throughout. True False

What are some examples of foods that need an emulsifier mayonnaise chocolate ice-cream oil water various salad dressings.

27. The contents of a drum have not been identified. You notice crystalline material on top of the drum, you should treat the contents as: A. shock-sensitive waste. B. nearly empty. C. containing chlorinated solvent. D. containing caustic materials.

A weak acid is a dilute acid that is not very powerful. True False

What is a crucial aspect of chemical optimization? Adjusting team member speed Pre-treating the vehicle Using water reclamation tanks Ordering new equipment

Why is chemistry sometimes referred to as the "central science?" Because we need to know it to survive as a species. Because it is interconnected with many other STEM disciplines. Because it incorporates principles from math and physics. Because there are many subdisciplines of science that rely on chemistry.

Malia was able to make a paperclip float on the surface of water. What will most likely happen to the paperclip if a drop o dishwashing detergent is added near it? Soap is a surfactant that increases the intermolecular forces of water allowing the paperclip to continue to float. Soap makes the water less viscous making the paperclip sink. Soap is a surfactant that disrupts the intermolecular forces of water making the paperclip sink. Soap makes the water more viscous allowing the paperclip to continue to float.