2. The air in a flask is to be replaced with He gas in a way similar to how air is replaced in the experiment. Should the flask be (A) hold upside down, (B) hold upright, (C) either way or (D) not enough information to answer? Provide an explanation below, Molar mass of air is- 29 g/mol.

Q: Use the information and table to answer the question. A chemistry company is hired to produce sodium…

A: Law of conservation of matter states that total mass of reactant is equal to total mass of product.

Q: How many grams of sodium chloride should result from reacting 6.65 L of chlorine gas with sodium

A: Given the reaction of sodium and chlorine as 2Na(s)  +  Cl2(g)  →  2NaCl (s) Given that  volume of…

Q: If 20.0g of copper(II) chloride reacts with 20.0 grams of sodium phosphate in aqueous solutions…

A: Given reaction 3 CuCl2 (aq) + 2 Na3PO4 (aq)  →  Cu3(PO4)2 (s)   + 6 NaCl(aq.)Mass of CuCl2 = 20.0…

Q: What amount of oxygen gas is needed to produce 28.04 mol of nitrogen monoxide in the reaction ?

A: Solution:  Chemical reaction in this process is :-  N2 (gas) + O2 (gas) → 2 NO (gas)  Here, 1 mol of…

Q: What mass of hydrogen peroxide must decompose to produce 48.64 g of water? _H,0, -_02 +_H,O

A: The balanced equation is given below: 2H2O2 —> 2H2O + O2 2 mol           2 mol 2x34 g.      2 x…

Q: How many grams of magnesium hydroxide are required to produce 3.21 moles of water? g

A:

Q: The concentration of arsenic in an insecticide can be determined gravimetrically by precipitating it…

A: Atomic Mass of Mg - 24 u Atomic Mass of As - 75 u Atomic Mass of O - 16 u yield of Mg2As2O7 - 106.5…

Q: metry etween magnesium fluoride and lead (IV) nitrate, m fluoride available: balance the chemical…

A:

Q: A candle is placed on one pan of a balance, and an equal weight is placed on the other pan. What…

A: 1: Candle is placed on one pan of a balance and an equal weight is placed on the other pan. To…

Q: astronauts on the International Space Station are staying​ healthy, so they have them routinely test…

A:

Q: If you forget to weigh the calorimeter and contents at the end of a Part 1 run, you will: Select…

A: While performing an experiment, human errors must be avoided. For that, the experiment must be…

Q: A solution containing 344g silver nitrate is mixed with 75ml of a 400 mol/l solution potassium…

A: First we need to write the balanced chemical of the reaction of silver nitrate with  potassium…

Q: On what law is stoichometry based, and how do thecalculations support this law?

A: Stoichiometry is the branch of chemistry that deals with the mass of various reactants and various…

Q: What is the mass percentage of O in CO2? Provide an answer to two decimal places.

A: Given,  The mass percentage of O in CO2 is:

Q: Wine is approximately 12% ethanol (CH3CH2OH) by volume. Ethanol has a molar mass of 46.06 g/moland a…

A:

Q: Use the information and table to answer the question. A chemistry company is hired to produce sodium…

A: Given that:Nas+HCIaq  → NaCIaq+H2gThe balanced chemical equation is given by,2Nas+2HCIaq  →…

Q: Complete the equations that account for the results of blowing carbon dioxide gas into water. CO2 +…

A: We have to complete the given reaction.

Q: Answer these questions in not less than 3 sentences.  How is the quantity of a gas related to those…

A:

Q: When octane is combusted with inadequate oxygen, carbon monoxide may form. If 100 g of octane is…

A: Given: Mass of octane = 100 g. And mass of oxygen = 200 g.

Q: If you mixed 8.0 tons of sand, 12 tons of rock, and 4.0 tons of cement to make concrete, what would…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A student performs an experiment like the one you saw in Experiment 8.  The student determines that…

A: Using the concept of weight percentage by mass we can calculate the total mass.

Q: Mass of sodium is 22.99, oxygen 16.75g hydrogen 1.21g how many grams of NaOH are in 305 ml of a .6M…

A: Given : Concentration of NaOH solution = 0.6 M And volume of NaOH solution = 305 mL = 0.305 L…

Q: The source of oxygen that drives the internal combustionengine in an automobile is air. Air is a…

A: (a) The balanced equation for the reaction of nitrogen and oxygen giving nitric oxide gas is, The…

Q: The thermite reaction,Fe2O3 + Al S Al2O3 + Feproduces so much heat that the Fe product melts. This…

A: a) The balance chemical equation for the thermite reaction is - Fe2O3 (s) + 2Al(s) →Al2O3(s)+ 2Fe…

Q: Combustion of hydrocarbons such as butane (C,H,) produces carbon dioxide, a "greenhouse gas."…

A: Answer:- This question is answered by using the simple concept of writing the balanced chemical…

Q: 3.50L of chlorine gas at SATP conditions is reacted with a 1.05L sample of 0.150mol/L potassium…

A: At SATP: T = 298.15 K = 25oC P = 101.325 kPa= 1 atm

Q: 29. The heat from an acetylene torch is produced by burning acetylene (C2H2) in oxygen. 2C,H2(9) +…

A: 2.40 mol of C2H2 reacts with 7.40 mol of O2.

Q: When the total number of moles of product and reactants are equal, K has no unit. Give reason.

A: K, the equilibrium constant is basically the ratio of the concentration of the products to that of…

Q: present

A: Dear student I have given answer to your question in the image format.

Q: A local water retention pond was found to have elevated levels of mercury concentrated as 14 ng per…

A: A mole is defined as the amount of substance containing the same number of discrete entities (atoms,…

Q: What volume (in L) of 1.60 M Na3PO4 would be required to obtain 0.870 moles of Na+ ions?

A: Molarity of Na3PO4 =  1.60 M Moles of Na+ ion = 0.870 moles Volume of Solution required = To be…

Q: The average molecular wt of a mixture of gas containing nitrogen and carbon dioxide is 36. The…

A: Given data contains, Average molecular weight of mixture of gas is 36. Amount of nitrogen present is…

Q: 1. What changes occur when a coefficient is added to a set of molecules?

A: When two or more atoms chemically combined then it forms molecule.

Q: How many grams of lead (IV) chloride would precipitate if a 240 g sample of nickel (II) chloride was…

A: In a balanced chemical reaction the reactants react and the products form in the molar ratio of…

Q: suppose a student reacts 1.57 g Ca with O2 gas. In his/her calculations however S/he mistakenly…

A: Theoretical yield is defined as the amount of product formed assuming the reaction efficiency to be…

Q: Zinc reacts with hydrochloric acid to make zinc chloride and hydrogen. Zn HC 220g lain what will…

A: The solution is as follows:

Q: A glucose solution is frequently used as an intravenous (IV) solution to supply hydration and/or…

A: a.  Molarity = no of mole/volume of solution in litre  Given, Molarity=0.278M Volume=2.05L Mole of…

Q: Suppose that in the experiment the student failed to heat the crucible and hydate sample long enough…

A: Question : Suppose that in the experiment the student failed to heat the crucible and hydate…

Q: 3. In lesson 4, you added the ionic compound potassium chloride (KCI) to water and observed a…

A: The kind of relationship between the number of molecules of water with respect to the magnitude of…

Q: Ammonia (Hydrogen Nitride) is harmful to our cells (no duh right?) but our body naturally makes a…

A: Given: 1) Our cells secrete ammonia into the bloodstream to be combined with carbon dioxide. In this…

Q: If a student calculated that 0.0035 moles of acetic acid present in a 5.0 mL sample of vinegar. Then…

A:

Q: What is the same on the left and the right side of a balanced chemical equation? Which scientific…

A: For any balanced chemical reaction, The number of atoms on left side (reactants) and the right side…

Q: If a student calculated that 0.0035 moles of acetic acid present in a 5.0mL sample of vinegar. Then…

A: given: moles of acetic acid = 0.0035 moles molar mass of acetic acid = 60.052 g/mol mass of acetic…

Q: How many grams of ozone (O3(g)) must decompose to produce 0.87 g of oxygen?

A: Given :- mass of O2 = 0.87 g  To calculate :- mass of O3 (in grams)

Q: The ratio of weight of oxygen in water and H2o2. Please write the solution eligibly. Thank you.

A: The ratio of weight of oxygen in water and H2o2 given below.

Q: 3. A 2.00 g sample of BrxOy is converted to 2.936 g of AgBr. Determine x and y.

A: 2.00g of BrxOy gives 2.936g of AgBr % of Br= ( Mol mass Br/ mol mass AgBr).100

Q: B. A chemist adds water to 25 mL of a 2.4 M solution of NaOH until the final volume is 3.02 L. What…

A: Dilution of the solution: On dilution of the solution with the pure water, the mole of solute…

Q: Consider the reaction: 2 Al(s) +3H,SO4(aq) --> Al2(SO4)3(aq) + 3H2(g) (molar mass of aluminum…

A: 1- First we will determine the moles of H2SO4 :  moles of H2SO4 = [ Molarity × Volume ]  moles of…