A balance measures mass to 0.001 g. If you determine the mass of an object that weighs about 30 g, would you record the mass as 30 g, 32.5 g, 31.25 g, 31.075 g, or 3000 g? Explain your choice by writing two to three complete sentences that describe your thinking.

Q: What is the pOH of a 0. 0235 M HCl solution?

A: we have to calculate the pOH of 0.0235M HCl solution

Q: BALANCE REDOX REACTION (USE THE LONG METHOD WITH CHECKINGS) SO2 + O2 → SO3 CONTENT SHOULD BE THESE…

A: This is redox reaction where reduction and oxidation occur simultaneously.

Q: 4. magnesium + silver acetate → Molecular Reaction: ution Oxidation half reaction:

A:

Q: 5. 16.0 g of SO₂ reacts with 16.0 g of O₂ to produce SO3: a. Write the balanced molecular equation:…

A:

Q: 36 > Macmillan Learning A current of 6.00 A is passed through a Sn(NO3), solution. How long, in…

A:

Q: In order to evaluate transport properties with ideal gases, one must specify these parameters…

A: Ideal gases are hypothetical gases, in which their molecule doesn't have any attraction or repulsion…

Q: What would you expect the observed colour of a solution to be, Whose maximum wavelength of…

A:

Q: For the chemical reaction,   2NaOH+H2SO4⟶Na2SO4+2H2O2NaOH+H2SO4⟶Na2SO4+2H2O   what mass of…

A: The reaction is :  2 NaOH + H2SO4 ==> Na2SO4 + 2 H2O  Moles of water given = 4.87 mol  Molar mass…

Q: 12.) The concentration of a saturated solution of acetylene gas in water at 25 °C is 0.040 M when…

A: Given -> -> Temperature is constant. -> initial solubility (C1) = 0.040 M  ->initial…

Q: Complete the fourth row of the table. Express the temperature in degrees Celsius to three…

A:

Q: How do you weigh hygroscopic solids? Give three examples of hygroscopic solids.

A: Hygroscopic property can be defined as the ability of a matter to absorb water from air. We have…

Q: Macmillan Learning In a particular redox reaction, NO is oxidized to NO3 and Cu²+ is reduced to Cut.…

A: Redox reactions are reactions in which one species is reduced and another is oxidized.

Q: The smell of rotting fish is due to a basic organic compound related to ammonia. What common kitchen…

A: Ammonia is an inorganic compound of nitrogen and hydrogen with the chemical formula NH3. In the…

Q: 5.) What volume in mL of a concentrated solution of NabH (6.0M) must be diluted to 200 mL to make a…

A:

Q: Hylon VII, a starch-based 'green' substitute for styrofoam packing material, has a bulk density of…

A:

Q: . Write the skeletal structures of propanal, acetone and cyclohexanone. What is the major…

A: #1:  Propanal is an aldehyde(R-CHO) with 3 C atoms.  Acetone is a ketone(RCOR) with 3 C atoms.…

Q: outline respective groups: cury (1), barium, arsenic (III), cadmium -ntum, lead, chromium (111) and…

A: Qualitative analysis is the method that involves precipitation reaction to remove the cations from a…

Q: Calculate the amount of energy given off when 13g of water at 51° C freezes to ice at 0°C. Did a…

A: At 51°C , water is in liquid phase, so first there would be cooling of water from 51°C to its…

Q: 2.) Cyclohexanol, C6H12O, boils at a higher temperature than diethylamine, C4H11N. For which of the…

A: Since the cyclohexanol boils at high temperature means at that temperature it's vapor pressure…

Q: BALANCE REDOX REACTION (USE THE LONG METHOD WITH CHECKINGS) SO₂ + O2 → SO3 CONTENT SHOULD BE THESE…

A:

Q: Why is there a need to adjust the acid concentration of Group I cations before saturation with H₂S?

A: The elements in the group 2 include beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr),…

Q: Use the oxidation number method to balance each ionic equation in an acidic solution

A: we have to balance the given reaction in acidic medium

Q: Consider the chemical reaction 4 K(s) + O2(g) ──> 2 K2O(s) The molar mass of K is 39.10g/mol, and…

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Q: If a reaction involving a single reactant is first order with a rate conatsnt of 4.50 x 10^-2 s^-1,…

A: Here we are required to find the time needed for first order reaction to be 53% of initial…

Q: What is the pH of an CuCl2 solution? (Hint: Split the compound apart into separate ions, determine…

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Q: Divide both of your results from the preceding two steps by the lower mole value to determine the…

A:

Q: BALANCE REDOX REACTION (USE THE LONG METHOD WITH CHECKINGS) Fe2+ + Cr → Fe + Cr³+ CONTENT SHOULD BE…

A: We have to find the balanced redox reaction for the following reaction: Fe2+ + Cr --> Fe +Cr3+

Q: Use Charles's law to complete the table. (Assume pressure and number of moles of gas to be…

A:

Q: To harvest blood culture, you add 100ul 10ug/ml colcemid to 10 ml blood culture.     What is the…

A: To calculate final concentration of colcemid in blood culture, we would use dilution law given as :…

Q: Please answer all questions. How many equivalent Lewis structures are necessary to describe the…

A: In NO2F there are 2 equivalent resonating structure for describing the molecule.

Q: The percent by mass of manganese(II) in Mn3(PO4)2 %. is

A:

Q: For the following reaction, 9.20 grams of ammonia are allowed to react with 13.6 grams of oxygen…

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Q: To make 500 ml 0.075M KCL hypotonic solution from  0.75 M KCl  stock solution, how many ml 0.75M KCl…

A:

Q: How did it became a amino and show solutions

A: Amines also called "amino" functional groups are organic compounds having either a primary amine…

Q: In valence bond theory every valence electron contributes to the strength of the bond.  Select one:…

A: Atoms consists of electrons, protons and neutrons. In an atom, there is nucleus at the center and…

Q: Give handwritten answer

A:

Q: BALANCE REDOX REACTION (USE THE LONG METHOD WITH CHECKINGS) MnO₂ + CrO3¯ → Mn + CrO4 CONTENT SHOULD…

A: We have to balance the given redox reaction. The given redox reaction is MnO2 + CrO3- → Mn + CrO4-.…

Q: Aspirin can be synthesized in the lab by combining salicylic acid (C7H6O3)C7⁢H6⁢O3) and acetic…

A: Here we are required to find the percent yield  for the aspirin synthesized

Q: In a red colored solution containing a cobalt-containing chemical, how could you easily estimate the…

A: To only get a ease estimate. We simply compare with the cobalt solution with varying concentration.

Q: When the following molecular equation is balanced using the smallest possible integer coefficients,…

A: The given unbalanced chemical change is Iron (s) + Hydrochloric acid(aq) →Iron(II) chloride (aq) +…

Q: What is the pH of an aqueous solution of KNO₂? (Hint: Split the compound apart into separate ions,…

A: If pH is less than 7 than solution is acidic in nature.   If pH value is more than 7  than solution…

Q: Rank the following groups in order of decreasing priority (1 = highest, 4 = lowest)

A: We have been given four groups and we have to rank the given groups in order of decreasing priority…

Q: Using any necessary data from appropriate sources, predict the enthalpy of formation of KCl and KF…

A: Born-Haber cycle is used to find the lattice enthalpy and enthalpy of formation of an ionic compound…

Q: What are the rules we should follow when handling reagents and solutions to prevent contamination?

A: There are some general rules that we should follow while handling reagents and solutions to prevent…

Q: pes of electromagnetic radiation are listed in the table energy per photon. For example, select "1"…

A: The electromagnetic spectrum is the range of frequencies of electromagnetic radiation and their…

Q: 3. calcium nitrate + aluminum chloride → Molecular Reaction:

A: Given reaction: calcium nitrate + aluminum chloride → We have to complete the reaction and have to…

Q: H₂OCH₂OH -OCH₂CH₂F -OCH₂CH3 -COOCH3

A: Atom with highest atomic number is assigned the highest priority.

Q: BALANCE REDOX REACTION (USE THE LONG METHOD WITH CHECKINGS) Fe²+ + Cr → Fe + Cr³+ CONTENT SHOULD BE…

A: The given redox reaction is Fe2+ + Cr →Fe + Cr3+. We have to balance the given redox reaction.…

Q: Prepare 200 grams of 0.15 molal Glucose (C6H12O6) solutions. Weight of solute needed: Weight of…

A: We have given mass of solution and molality of glucose solution and have to find the weight of…

Q: How many grams of diatomic nitrogen (N2) are needed to produce 2.75 moles of ammonia

A: In formation reaction of ammonia  two mole of ammonia is formed by one mole of di nitrogen react…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.