Chemistry

A cylinder of oxygen (O2) gas at STP has a volume of 2.75 L. How many oxygen molecules does it contain?
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How many moles are in 2.5L of 1.75 M Na2CO3
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How many ions are in the following compounds?a. (NH4)3PO4 =b. NaCl =
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Cu + 2AgNO3 Cu(NO3)2 + 2AgIf a 40. g sample of Copper is used with an excess of silver nitrate, calculate the theoretical yield of silver. What is the percent yield of the silver, if 120 g was collected?
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An atom will be neutral if which of the following are true of its arrangement of subatomic particles?The number of its protons is equal to the number of its electronsAll of its electrons orbit its nucleus at exactly the same distanceThe sum of the atom's protons and neutrons is greater than zeroThe nucleus of the atom contains more neutrons than anything else
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How many grams of NaN3 are required to produce 283 L of nitrogen gas about the size of an automotive air bag, if the gas has a density of 1.25 g/L? Please answer ASAP
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What does Ra Ra Ah Ah Ah Ro Ma Ro Ma Ma Ga Ga O La La mean?
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You are given 127 g H2CO3 (Carbonic Acid) and a volume of 800 mL of water, what will the final concentration of your solution be? (The final unit is the Molar (M), but do not include it.) (Round to 3 decimal places.)
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what are the elements found in The human body?
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Hydrogen can be produced according to the following word equation=zinc +hydrochloric acid =zinc chloride +hydrogen [zn^+2]Write a complete balanced chemical equation for this chemical reaction?
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Identify 5 factors of weather
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a 2.7 L of N2 is collected at 121kpa and 288 K . if the pressure increases to 202 kpa and the temperature rises to 303 K , what volume will the gas occupy?
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Help plz now !Which statement explains why a chemical equation must be balanced?A. It must show the reactants and products on the correct sides ofthe reaction arrow.B. It must show that the mass of each element involved is conservedby a chemical reaction.C. It must show how each chemical formula is written to accuratelyrepresent each substance.D. It must show that coefficients and subscripts can be used inchemical formulas.
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What is the effect of climate on ice?How does ice affect water systems?
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What is the enthalpy change(Q) when 60.0 g of NaOH is dissolved in one litre of water, given that the temperature of the solution increased by 15.8 C?
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If a scientist wants to make molecules move slower, what should they do? A. decrease their kinetic energy B. Transfer energy out of them C. Put them in a freezer D. All of the above
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Methods of Heat TransferIdentify the following examples of heat transfer as conduction, convection, or radiation.1. Touching a metal spoon that is sitting in a pot of boiling water.Will mark brainliest
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Avanti works in a bookstore. She has four books and is going to place them in two stacks. The diagram above shows the books before they touch. Use the information in the diagram to answer the question
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