7. Products are the substances at the beginning of chemical reactions. 8. Chemical equations shows how atoms are rearranged in a chemical reaction. 9. The Law of Conservation of Mass states that atoms cannot be created nor destroyed in a chemical reaction. 10. When balancing chemical equations, the subscripts can be change

Q: What is the median of the values 7.79, 8.24, 5.81, 4.97, 1.04, 7.39, and 7.22?

A: Median value can be calculated as:

Q: "Analytical data are never more reliable than the sampling technique". Explain this statement.

A: Answer- Analytical data is a collection of data that is used to support decision making and/or…

Q: A homogeneous mixture has  a/ not a uniform composition throughout  b/ a uniform composition…

A: Anything which have some mass and can occupy some space is known as the matter. Matter can be exists…

Q: Am I right? Calculate the mass percentage of water in the hydrate. Show the calculations. Sample 1…

A: mass percentage of water = Mas of waterMass of hydrate x 100

Q: It seems that something in the answer went wrong. Because this is not the correct answer.

A: Given,  Mass of C3H7OH = 2.495 g  Initial temperature = Ti = 298.00 K  Final temperature = Tf =…

Q: Conversion : 1 kg steam = ..... kcal 1 kg steam = ..... cal 1 kg steam = ..... kw Please guide…

A:

Q: A box with a volume (V=0.05 m³) lies at the bottom of a lake whose water has a density of (1*10°…

A: The buoyancy force is defined as Fb=ρVg Here ρ is the density of fluid, V is the volume of the…

Q: References Use the References to access important values if needed for this question. In the…

A: Energy (Q) = 55.7 J Mass (m) = 10 g T1 = 22.2°C T2 = 35.6°C

Q: There are not two answers. Must choose one. I think it is B.

A: We have to undergo the formation of 3-octyne using bromination and elimination from an intermediate.

Q: Show ALL your steps and details in your calculations, by using GRASPS: Given, Required, Analysis,…

A:

Q: The mass of magnesium used in this experiment is critical to determining the moles of hydrogen gas…

A: The reaction considered is the formation of H2 gas by the reaction of Mg with HCl. The balanced…

Q: ? 1. 03 2. DMS Br₂, DCM KMnO4, Hot ? X2

A: 1) The reaction is ozonolysis in reductive work-up (due to dimethyl sulfide). In this reaction,…

Q: Js your the following function homogeneous 올 (x+y) annur. 21= or not? Prove

A:

Q: BaCl2(aq)+H3PO4(aq) --> Ba3(PO4)2(s) + HCl(aq) Express you answers as inetergers seperated by…

A: Given -> BaCl2(aq) + H3PO4(aq) <-----> Ba3(PO4)2(s) + HCl(aq)

Q: I" * Critically discus the term " Heating"

A: A question about the term heating, which is to be accomplished.

Q: 3. An isolated system (a) Is a specified region where transfer of energy and/or mass take place (b)…

A: Here we are asked to choose about an isolated system from the given option.

Q: 1-27. Noble gases (Group 18 in the periodic table) have the follow- ing volume concentrations in dry…

A: The ideal gas law is given by: PV= nRT; where P= pressure, V= volume, n= no. of moles; R= universal…

Q: If molecules of hydrogen, nitrogen, oxygen and chlorine have the same kinetic energy which molecule…

A: average kinetic energy of molecule = (3/2)KT For all molecule at same temperature

Q: All physical changes can be identified at a macroscopic level.   True or False

A: Physical changes are the changes affecting the form of a chemical substance, but not its chemical…

Q: Discuss the difference between theory and scientific law

A: Theory: The plausible explanation which is given for various kinds of phenomenon, event or behaviors…

Q: [References] Use the References to access important values if needed for this question. A model for…

A: We have to write balanced equation for the formation of given compounds

Q: A student doing the distillation performed in this experiment notices that, while the liquid in the…

A: As per the question asks that boiling temperature is 53 degree Celsius. Thus distillation occurs at…

Q: 7. The compound shown is a common artificial sweetener molecule. Which functional groups can undergo…

A: Note: According to our guidelines we are supposed to answer only one question.  Kindly repost other…

Q: a) A 555.0 g sample of liquid water is exposed to the light emitted by a nitrogen laser. Assuming…

A:

Q: 6. What is theoretical density for Al (aluminium). Use the following information: A= 26.98 g/mol…

A: IntroductionThe theoretical density, also known as the calculated density or ideal density, refers…

Q: 9. How many moles of phosphorus pentachloride are needed to make 35 liters of water? 35 LHO 4 moles…

A: The number of moles of a subtance is calculated by the formula, n=mM Where, m is the given mass of…

Q: If the equation produces from data is y = 0.371lx - 1.050 and the absorbance for the unknown is…

A: The question is based on concept of Lambert beer's law. it  states that absorbance is directly…

Q: what is major product of following ? Br H30* ? Phi

A: Applying concept of organic synthesis.

Q: Cadii Part C The following ions contain the same number of electrons. Rank them in order of…

A: In the isoelectronic species (same number of electrons), higher the amount of positive charge has…

Q: 4 Fe + 3 0, 2 Fe,0, Vhat volume (liters) of O, is required to react with 1.7 moles of Fe? 1 mole O.…

A: The mole concept is used to solve such problems. The mole concept was proposed by Avogadro. It…

Q: how long from the original starting time would it have taken to achieve a tempreture of 55 C with…

A: Given: Mass of resistor = 5 g Mass Calorimeter = 22.1 g Mass of calorimeter + water = 116.5  Mass of…

Q: It says change in H is incorrect.

A: Excess of HCl means NH3 is limitting reagent and hence moles of product depends only on moles of NH3…

Q: what's the difference between natural law and a theory?

A: The difference between the natural law and a theory with aspects to chemistry is explained in next…

Q: Multiply both sides of the equation by the same expression: (Be sure that the answer field changes…

A: Multiply both sides equation by the same expression.  The expression become as           To multiply…

Q: An atom of hellum has a radius e = 31. pm and an average speed in the gas phase at 25°C of 787.m/s.…

A: rHe = 31. pmAverage speed in gas phase = 787.m/s Temperature= 25°C = 298K Uncertainty in speed =…

Q: 11) The half-life of Aluminum-28 from your lab is 2.2414 minutes. If you start with 13 mg of the…

A: Radioactive decay is a first-order reaction.The integrated rate law for radioactive decay is given…

Q: 12) In class PET (Positron Emission Tomography - a method of medical cancer evaluation) was…

A: To solve this problem, we need to use the concept of radioactive decay to find out how much of the…

Q: Consider the given chemical equation: Pb3O4+x HCIy PbCl2 + Cl2 + z X, y and z respectively are

A: The given chemical equation is  Pb3O4 + x HCl →y PbCl2 + Cl2 +z O2 The values of x, y, z are ------?

Q: Deductive reasoning is applied in forensic science, instead of inductive. This statement is true or…

A: The difference between inductive and deductive reasoning is that inductive reasoning focus at…

Q: By definition, what reaction equation does the AG°f for liquid propanal refer to? Choose…

A: We can see that propanal have C, H and O in its formula, so to from propanal carbon, Hydrogen and…

Q: QUESTION 7 5.64 k Joules equal 564000 joule O True O False

A: We know that, 1 KJ = 1000 J

Q: Use the References to access important values if needed for this question. The compound…

A:

Q: n=? O PVIRT O PTIRV O TR/PV O PR/VT

A:

Q: HOʻ KMNO4 ?

A: KmnO4 is a strong oxidising agent .  It oxidises primary alcohol to acid and secondary alcohol to…

Q: Start with ?(?)=??. Reflect it horizontally, expand it horizontally by a factor of 0.018, expand it…

A: We will find final equation for the temperature of a can of soda placed into a refrigerator.