Write the chemical formula for phosphoric acid. Enter the answer
What is the chemical formula for diphosphorus monoxide? Your Answer P_(2)O PO_(2) P_(2)O_(5) PO_(4)
The general measurement of the amount of liquid that is dissolved in a given quantity of solvent; usually expressed as mol/L for chemistry. molality molarity comprehension concentration
19. How many moles are present in 20.0 g of NO_(2)
7. A chemist has 3.45times 10^22 molecules of P_(2)O_(5) How many grams of P_(2)O_(5) does the chemist have?
FIII In the Blank Question Metal oxides are square anhydrides, and nonmetal oxides are square anhydrides.
If 65.5 mL of HCl stock solution is used to make 450 mL of a.675 M HCl solution, what is the Molarity of the stock solution? (Put your answer in 3 sig.fig.) Dilution square
If a pH of river decreases from pH 7 to pH 4 there will be 3x more H^+ in the river there will be 1000X less H^+ in the river there will be 10X more H^+ in the river there will be 1000X more H^+ in the river
What is the conversion factor between mole and atoms? 1gram of the substance=molar mass of the substance 1mole=molar mass of the given substonce 1atom=6.022times 10^23moles 1mole=6.022times 10^23atoms/particles
Which TWO factors can create supersaturated solutions? increase in pressure decrease in pressure decrease in temperature increase in temperature
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.
