What type of symbolic representation is shown below? KClO_(4) Mathematic Relationship Graphical Relationship Chemical symbols
Bases are __ . Proton (H+) acceptors Proton (H+) donors
What volume of H_(2) gas, in mL, is produced from 0.260 g Mg reacting with an excess of HCl at a pressure of 1.28 atm and a temperature of 312K? Mg(s)+2HCl(aq)arrow MgCl_(2)(aq)+H_(2)(g)
A molecule of P_(2)O_(5) is formed because of covalent bonding. True False
Convert 4.32 grams of Sn(CO_(3))_(2) to moles of Sn(CO_(3))_(2) Round to 3 significant figures. Answer square
To convert amount in moles to the number of atoms in an element, multiply by square square
A chemical reaction that has more moles of gaseous reactants than of gaseous products in the balanced chemical equation is at equilibrium. When the volume of the reaction vessel decreases, the reaction shifts to the square and more square forms.
Multiple Choice Question Which is the acid ionization constant? the value of the equilibrium constant expression for the ionization of a base the value of the equilibrium constant expression for the ionization of a weak acid the negative logarithm of the hydroxide ion concentration of a solution the negative logarithm of the hydrogen ion concentration of a solution
Which statements correctly describe the compound potassium bromide? Select all correct answers. The compound is considered a salt. Potassium bromide likely has a higher melting point than that of candle wax. The electronegativities of the two component atoms are very similar. It contains potassium and bromide ions in a one-to-one ratio.
Solve for [Al] in the expression: 4.0times 10^-6=([Al]^2)/(0.050) 8.9times 10^-3 4.5times 10^-4 4.0times 10^-14 2.0times 10^-7
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.
