Master Chemistry with Fun Quizzes & Brain Teasers!

what are the correct coefficients if the law of conservation of mass is applied to the decomposition of solid ammonium nitrite to nitrogen gas and liquid water?
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What makes field forces unique?
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Which of the following frequencies isequivalent to a frequency of 85,000Hz?A. 85 GHzB. 85 mHzC. 85 MHzD. 85 kHz
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How can we increase a pulley's output force?
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Hey can anyone pls solve these problems!!! pls
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what is the maximum amount of flammable liquids that can be stored outside of a rated flammable cabinet in a laboratory?
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what is the percent yield when a reaction vessel that initially contains 65.5 kg ch4 and excess steam yields 15.0 kg h2?
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a hydrogen atom in its ground-state absorbs a photon of wavelength 97.20nm. to what energy level does the electron move?
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which of the following has the lowest conductivity? a. 0.1 m cuso4 b. 0.1 m koh c. 0.1 m bacl2 d. 0.1 m hf e. 0.1 m hno3
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a brittle white crystalline solid has a melting point of 760 c and reacts when added to water. this substance is most likely what type of solid
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calculate the freezing point and boiling point of a solution containing 8.20 g of ethylene glycol (c2h6o2) in 87.9 ml of ethanol. ethanol has a density of 0.789 g/cm3.
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All of the following ions have the ground-state electron configuration of a noble gas except which one? Select one: a. Ca2+ b. Cl- c. H- d. Al3+ e. Ga3+
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pls help this is for chemistry the CK-12 Polyatomic Ions
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The rate of effusion of substance A is 3 times the rate of effusion of substance B. If the molar mass of substance A is 4.00 g/mol, what is the molar mass of substance B?
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The mole fraction of Ar in a mixture of gases is 0.829 with a partial pressure of 0.341 atm. What is the total pressure of the sample?
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How specifically is kinetic energy lost during a car crash?
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What happens when forces are unbalanced?
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Help me please!!! Useful answers only!!!Valence Electrons:Barium: 2Phosphorus: 5Oxygen: 6b) Based on the number of valence electrons, write the monatomic ion (symbol with charge) each element may form. c) Phosphorus and oxygen can bond to form a polyatomic ion. Write the formula of for this ion and be sure to include the ion charge.d) Using the monatomic ions you listed above in (b), the polyatomic ion from (c), write the formulas for the three ionic compounds these ions could form
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how many molecules of h2s are required to form 79.0 g of sulfur according to the following reaction? assume excess so2.
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which of the aqueous solutions below will have the highest boiling point? 0.070 m libr 0.050 m ca(no3)2 0.070 m c6h12o6
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ion x has a charge of 2 , and ion y has a charge of 1-. what is the formula unit of the compound formed from the ions?
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a sample of oxygen gas has its absolute temperature halved while the pressure of the gas remained constant. if the initial volume is 400 ml, what is the final volume?
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what makes an element distinct? a. the number of protons b. the number of neutrons c. the number of electrons d. the total mass of all the particles e. none of these
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a tank at is filled with of carbon monoxide gas and of chlorine pentafluoride gas. you can assume both gases behave as ideal gases under these conditions. calculate the mole fraction and partial pressure of each gas, and the total pressure in the tank. be sure your answers have the correct number of significant digits. carbon monoxide mole fraction: partial pressure: chlorine pentafluoride mole fraction: partial pressure: total pressure in tank:
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