Chemistry (Check)

Questions

6.3 mg of a boron hydride is contained in a flask of 385 mL at 25. degrees C and a pressure of 11 Torr.A. determine the molar
1. 6 answers
2. asked by Anonymous
3. 4,922 views
If a gas in a closed container is pressurized from 12 atm to 25 atm and tis original temperature was 32 degrees C, what would
1. 4 answers
2. asked by Anonymous
3. 1,306 views
How many molecules are there in 985 mL of nitrogen at 0.0 degrees C and 1.00x10^-6 mmHg?3.50 molecules
1. 9 answers
2. asked by Anonymous
3. 7,686 views
In a calorimeter experiment done at constant pressure in which all the heat from a chemical reaction was absorbed by the
1. 3 answers
2. asked by Anonymous
3. 1,113 views
Calculate the mass of 15.0 L of NH3 at 27 degrees C and 900 mmHg.Mass of NH3 = 12.2 g
1. 7 answers
2. asked by Anonymous
3. 8,948 views
Classify each of these statements as always true, sometimes true, or never true.__ST___13.In an equation, a substance is shown
1. 4 answers
2. asked by Dennis
3. 1,822 views
PF3 reacts with XeF4 to give PF52PF3(g) + XeF4(s) --> 2PF5(g) + Xe(g) How many moles of PF5 can be produced from 100.0 grams of
1. 4 answers
2. asked by Anonymous
3. 3,048 views
A container holds 500. mL of CO2 at 20. degrees C and 742 Torr. What will be the volume of the CO2 if the pressure is increased
1. 3 answers
2. asked by Anonymous
3. 2,196 views
i have to fill in the blanksIn an ionic compound the charges of the Blank and Blank must balance to produce an electrically
1. 3 answers
2. asked by Bryan
3. 2,563 views
Thanks but can you check another one for meThe Valence electrons largely determine the blank of an element and are usually the
1. 1 answer
2. asked by Bryan
3. 496 views
Fill In the BlankCompounds that are formed when two or more atoms combine to form molecules are called __________. is it
1. 1 answer
2. asked by Bryan
3. 647 views
True or False?In a structural formula a shared pair of electrons is represented by two dashes. Is this True? Fill in the blank
1. 1 answer
2. asked by Bryan
3. 742 views
True, False, or Sometimes true1)A bond in which one atom contributes both bonding electron is called a polyatomic covalent
1. 3 answers
2. asked by Bryan
3. 894 views
Completion1)Transition Metals 2)Stock 3) Many of the ___1____ have more one common ionic charge. These ions are named using
1. 1 answer
2. asked by Bryan
3. 412 views
Completionis these correct. I can't figure out 5,7,8,9.. 1)equally 2)Non-polar 3)un equally 4)polar bond 5) 6)clipore
1. 2 answers
2. asked by Bryan
3. 628 views
Label each of the three following sentences that describe accuracy with an A. Label each sentence that describes precision with
1. 1 answer
2. asked by Bryan
3. 772 views
Classify each of these statements as always true, sometimes true, or never true11)sometimes true 12)Never True 11)Scientific
1. 3 answers
2. asked by Bryan
3. 925 views
Completion.struggling with this....I got 1) 2)Precision 3)experimental value 4) 5) The ___1___ of a measurement describes how
1. 1 answer
2. asked by Bryan
3. 551 views
CompletionPercent error is calculated by dividing the ___1____ of the error by the accepted value and then multiplying by
1. 1 answer
2. asked by Bryan
3. 916 views
Is the following sentence true or false?An answear is as precise as the most precise measurement from which it was calculated.
1. 1 answer
2. asked by Bryan
3. 611 views
Completion1)Metric 2)Five 3)Meter 4) 5)Weight The International System of Units (SI) is a revision of the ___1____ system. There
1. 1 answer
2. asked by Bryan
3. 647 views
Completion1)Metric 2)Five 3)Meter 4) 5)Weight The International System of Units (SI) is a revision of the ___1____ system. There
1. 2 answers
2. asked by Bryan
3. 751 views
Classify each of these statements as always true, sometimes true or never true.__NT___11. The SI base unit of mass is the
1. 2 answers
2. asked by Bryan
3. 1,103 views
classify each of these statements as always true, sometimes true, or never true.__ST___11)The unit of a conversion factor must
1. 1 answer
2. asked by Bryan
3. 1,069 views
Completion1)1 2)conversion factor 3)change 4)Dimensional anaylsis 5) Whenever two measurement are equal, or equivalent, a ratio
1. 1 answer
2. asked by Bryan
3. 691 views
Are most factors unity?Is this True or false I'm thinkin true.. The actual size of a measurement multiplied by a conversion
1. 1 answer
2. asked by DrBob222
3. 459 views
True or FalseThe empirical formula of a compound is always the same as the molecular compound. My Answear: True The empirical
1. 3 answers
2. asked by Bryan
3. 1,535 views
Completion1) 2)6.02 X 1023 Chemists relate units of counting, of mass, and of volume to a single quanity called the _______. The
1. 1 answer
2. asked by Bryan
3. 515 views
Part B True-FalseClassify each of the statements as always true, sometimes true, or never true. 1.____ST______ one mole of any
1. 3 answers
2. asked by Bryan
3. 1,112 views
Classify each of these statements as always true, sometimes true, or never true1)___AT_____A mole of a pure substance contains
1. 1 answer
2. asked by bryan
3. 800 views
Classify each of these statements as always true, sometimes true, or never true.7____AT____It is necessary to know the formula
1. 2 answers
2. asked by Bryan
3. 1,034 views
The Lyman series.Of the four lines, 91.2nm, 97.2nm, 102.6 nm, and 121.6nm, which one has the A. Highest wavelength? _____ B.
1. 2 answers
2. asked by Anonymous
3. 569 views
Q: Name the group that has a general electron configuration of ns^2 and provide an example of an atom with this general
1. 2 answers
2. asked by Anonymous
3. 496 views
Q: Identify all that is incorrect about the set of four quantum numbers and explain why. {-3, 2, 1, 1/2}A. -3 because there
1. 2 answers
2. asked by Anonymous
3. 554 views
Q: Number of unpaired electrons in the nitrogen atom.A: 1s^2 2s^2 2p^6. 3 unpaired electrons in the p orbital Q: Number of 4d
1. 2 answers
2. asked by Anonymous
3. 626 views
Nitrogen combines with oxygen to form a variety of compounds. One of these compounds is called nitrous oxide or "laughing gas."
1. 1 answer
2. asked by Anonymous
3. 632 views
Determine the type of chemical reaction, find the limiting reagent, determine the amount of product in grams, and the amount in
1. 1 answer
2. asked by Anonymous
3. 647 views
How many grams of NaOH are in 500 mLm of a 0.50M solution?500mL --> .5L MM NaOH = 39.997g M x V = n .5 x .5 = .25moleNaOH
1. 1 answer
2. asked by Anonymous
3. 430 views
How many grams of NaOH are in 500mL of a 0.50 M solution?500mL=.5L MM NaOH = 39.99711g M x V = n 0.5 x 0.5 = .25moleNaOH
1. 3 answers
2. asked by Anonymous
3. 453 views
Ammonia can be produced in a two-step process. First, nitrogen reacts with red-hot magnesium to form magnesium nitride. Then
1. 2 answers
2. asked by Anonymous
3. 579 views
Ammonia can be produced in a two-step process. First, nitrogen reacts with red-hot magnesium to form magnesium nitride. Then
1. 1 answer
2. asked by Anonymous
3. 723 views
A sample of gas has a volume of 12.0 L and a pressure of 20kPa. If the pressure of gas is increased to 50 psi, what is the new
1. 3 answers
2. asked by Anonymous
3. 383 views
Chlorine gas, Cl2, is widely used to purify municipal water supplies and treat swimming pool waters. If it occupies 23.5 cm^3 at
1. 4 answers
2. asked by Anonymous
3. 550 views
A 30.0 L sample of nitrogen inside a rigid, metal container at 20.0 degrees C is placed inside an oven whose temperature is 50.0
1. 1 answer
2. asked by Anonymous
3. 1,020 views
A sample of helium has a volume of 521 cc at a pressure of 75 cmHg and a temperature of 18 degrees C. When the temperature is
1. 1 answer
2. asked by Anonymous
3. 603 views
The bond strengths of the compounds HF, HCl, HBr, and HI are as follows:compound bond strength, kJ/mol HF 569.87 HCl 431.62 HBr
1. 3 answers
2. asked by Anonymous
3. 2,164 views
Calculate the DHrxn ofC6H12O6 (s) + O2 (g) --> CO2 (g) + H2O (l) with DHf. C6H12O6(s) -1260.04 O2(g) 0 CO2(g) -393.5 H2O(l)
1. 3 answers
2. asked by Anonymous
3. 574 views
Calculate the DHrxn ofC57H110O6 (s) + O2(g) --> CO2(g) + H2O(l) with DHf. C57H110O6(s) -390.70 O2(g) 0 CO2(g) -393.5 H2O(l)
1. 2 answers
2. asked by Anonymous
3. 512 views
Calculate the DHrxn ofC6H12O6 (s) + O2 (g) --> CO2 (g) + H2O (l) with DHf. C6H12O6(s) -1260.04 O2(g) 0 CO2(g) -393.5 H2O(l)
1. 4 answers
2. asked by Anonymous
3. 545 views
What is the volume of the gas in a balloon at -195 degrees C if the balloon has been filled to a volume of 5.0L at 25 degrees C?
1. 4 answers
2. asked by Sarah
3. 396 views
Which of the following exhibits the highest boiling point?a. Ne, Ar, Kr, or Xe? Xe b. HF, HCl, HBr, or HI? HI c. CH3CH3,
1. 1 answer
2. asked by Anonymous
3. 401 views
Are these right?Chemical formula: NaCl Name: Sodium chloride Bond Type (intramolecular FOA): ionic bonding VSEPR molecular
1. 1 answer
2. asked by Kyle
3. 460 views