Can you please help us with number eight. ? Please see the picture.  This is not a graded question as it is a practice question . I am 60 years old and helping my son prepare for the AP exam in a few months. We do questions at the back of the textbook by Zumdahl and Zumdahl

Q: Q25:  There are so many microbes in a single mL of culture, it is very difficult to perform one…

A: Given: 2 serial dilutions are performed, each with a value of 1 (dilution)

Q: Please help with a brief description of the following observations.   LiCl Observations   NaCl…

A: The given compounds are : LiCl, NaCl, KCl and CaCl2

Q: How many moles of H2 gas can be formed from 0.389 grams of Mg? Mg(s)+2HCl(aq)⟶H2(g)+MgCl2(aq)

A: From the given balanced equation, 1 mole of Mg gives 1 mole of H2 gas. The molecular weight of Mg…

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: What does the bar graph show us about changes in animal versus human biomass during the 20th…

A: Global warming is the condition in which the temperature of the earth keeps on increasing due to the…

Q: Calculate the molecular mass of isopropanol (C3H$O).

A: The sum of the atomic masses of all atoms in a molecule

Q: Type your answer to the following: Consider the steps the student took in the following scenario.…

A: A student forgot to weigh the filter paper prior to filtering the salt from the sand. To make up for…

Q: Explain how we know human activity contributes to global warming that causes sea level rise. What is…

A: Global warming has different adverse effects. Global warming can become the sole reason for human…

Q: 17. You have 41 mL L of graduated cylinder, it now reads 77 mL. What is the volume of the pebble?

A: Initial water level=41mL Water level after dropping pebble=77mL

Q: nsider the compound. What is the IUPAC name for the compound shown? Spelling and punctuation count.…

A: The organic compound is given and we have to tell the IUPAC name of the compound.

Q: Chem 105 Online Data Collection and Calculations Part 1: Separation of Salt, Sand, and Iron Data…

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

Q: 2. Calculate AH for the following in the same way you did in #1. a. CO2 (e) + 4 H2 (g) → CH4 (g) + 2…

A: The enthalpy of the given reaction can easily be calculated by the difference of enthalpy of…

Q: If you were told the average weight of a chickadee is 1.5gm, does that mean all chickadees are 1.5gm…

A:

Q: Historically, toxicology testing has been focused on one chemical at a time, yet we are rarely…

A: Toxicology is the study of the harmful effects of chemical, physical, and biological agents on…

Q: Question 6 As global warming melts polar ice, fewer seals can be found in the Arctic. As a result,…

A: Global warming is the condition in which the temperature of the earth keeps on increasing due to the…

Q: what is the theoretical volume of carbon dioxide you are adding to the air?

A: Number of moles = mass/molar mass  1 mol gas = 22.4 L

Q: 2. Make a list of some facts in this article that relate to what we have studied so far. What We…

A: 1  As bectrium are able to substitute phosphorus with arsenic it indicates that chemistry of arsenic…

Q: Briefly define the phrase “fit-for-purpose” in relation to analytical chemistry.

A: It is an ideal standard in analytical chemistry to obtain data of suitable quality. Both analysts…

Q: A cereal contains 11.0 grams of sucrose (Cı:H2:O11) per 60.0 grams of cereal How many grams of…

A: Given :-  Mass of sucrose present in 60 g cereal = 11.0 g  To calculate :- amount of cereal that…

Q: Scenario In an investigation, lab groups combine two compounds, as shown below. Based on the data…

A: Given mass of magnesium is 5 gram and given mass of HCl is 15 gram . first we are going to calculate…

Q: Can you help with # 70.  This is not a graded question as it is a practice question . I am 60 years…

A:

Q: Apple cinnamon Glade air freshener has two fragrance molecules in it. The 'apple' molecule has a…

A: Graham's law of diffusion: At a given temperature, rate of diffusion (r) of a gas is inversely…

Q: Mr. Auric Goldfinger, criminal mastermind, intends to smuggle several tons of gold across…

A: Given, Diameter of small gold D= 8 cm Radius of small gold balls, r = D2 =82= 4cm density of solid…

Q: Can you please help with number four in the picture.This is not a graded question as it is a…

A: It is given that temperature increases on mixing,  which means that the reaction is exothermic

Q: 10. Calculate the volume of water in your melted ice and isopropanol solution.

A: We have been asked to solve question no. #10 Volume of isopropanol = 50ml Volume after ice melted =…

Q: A chemist measures the amount of nitrogen gas produced during an experiment. She finds that 27.7 g…

A:

Q: (4) NHẠC|(s) → NH318) + HC\6) ΔΗ4? Solid ammonium chloride sublimes (i.e., changes from a solid to a…

A: To find out the enthalpy of sublimation and decomposition of ammonium chloride in terms of the…

Q: A mixture of 200.5 g of Cl, and 43.8 g of P reacts completely to form PCl, and PCI,. Find the mass…

A:

Q: 1a. Throughout the experiment, what are some possible sources of error that could have led to…

A: The objective of this question is to show the experiment involving the separation of table salt and…

Q: Drag the appropriate items to their respective bins. Reset Help bluish color gas at room temperature…

A: Answer :-  Physical  Chemical  bluish color  gas at room temperature  pungent odor   very…

Q: lonic compound Metal Number of cation nonmetal number of anion total total charge = 0 valence…

A: Ionic compounds are formed with the help of cation and anion. The ionic charge is generally balanced…