A 0.1110 g rock sample containing an unknown amount of Ca was dissolved in HCl and diluted to 100.0 mL. Aliquots of 20.00 mL from this solution were added to different volumes of a 2.08 µg/mL Ca standard solution and diluted to 200.0 mL. The emission intensity of these solutions was measured using atomic emission spectroscopy. The results are shown in the table. TTT Unknown volume (mL) | Standard volume (mL) Final volume (mL) Emission Intensity 20.00 0.00 200.0 208.0 20.00 5.00 200.0 394.0 20.00 10.00 200.0 618.0 20.00 15.00 200.0 812.0 20.00 20.00 200.0 1002.0 Find the weight percent of Ca in the rock sample and its uncertainty using the method of standard additions. weight percent: % Ca 土 % とTOOLS

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: What volume of hydrogen gas is produced when 93.6 g of iron reacts completely according to the…

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

Q: Administration of digitalis, a drug used to control atrial fibrillation in heart patients, must be…

A:

Q: Many processes occur in the digestive system. Which process is best classified as a physical change?…

A:

Q: For the following reaction, use the plots below to determine the reaction order wit respect to NO2…

A: Given : We have to tell the order of NO2 .

Q: 1) A 1.728 in' of a substance has a mass of 36 grams. What is the density of the substance in g/cm'?…

A:

Q: 5.00Mm to m

A: given: 5.00 mm  we have to convert milimeter to meter. now, 1000 mm = 1 m now we have to divide the…

Q: Please answer question number 1 correctly with the correct answer. there is a picture of an example…

A: Atomic mass of carbon = 12 amu Atomic mass of hydrogen = 1 amu Atomic mass of oxygen = 16 amu…

Q: use the following data to create a scatter graph with smooth lines and markers to connect and…

A: Given information is,

Q: What is the pH of the titrated solution at the equivalence point? (use Kb, and and ICE table)

A: AT equivalence point,  moles of acid = moles of base added. Substituting given values, the volume…

Q: Name: Total /18 Guacamole Assignment Amadeo Avogadro wants to make guacamole. He needs two avocados…

A: 1 Molar Mass of citric Acid C6 H8 O7=192.124g/mol 2 Lime=2tbsp juice      2 tbsp=6 tbsp      1…

Q: A student determined the density of a solid to be 2.90, 2.91 and 2.93 g•cm–3. If the actual density…

A: Accuracy is the closeness of the measured value to a standard/true value. While Precision is the…

Q: convert 650 nm to cm

A:

Q: You are to give ampicillin, with a recommended dose of 35 mg/kg, to a child with a mass of 23 kg. If…

A: For every medicine, a required dose is needed to cure any disease.We need to calculate the number of…

Q: Memorize that 1mL=1cm3 Convert 2000mL to cm3 Use a conversion factor of 1cm3/1mL

A: If we are having,  1mL=1 cm3

Q: What is the molecular weight of nitrous oxide (N₂O)? Provide an answer to two decimal places.

A: we can find out the molecular weight of nitrous oxide by adding the mass of individual terms

Q: 203.77miles/sec is converted to cm/nsec?

A: 1 mile = 1.609 kilometres 1 kilometres= 1000 meters 1 meters= 100 centimetres 1 sec = 10^9 nsec

Q: My height is 4’11

A: Given that : Height = 4'11 We know that 1 ft = 12 inches So, 4 ft = 12 x 4 = 48 inches And 4'11 = 48…

Q: Provide the correct IUPAC name for the compound shown here. OH

A: IUPAC nomenclature of carboxylic acid: • Identify the longest continuous carbon chain. • Identify…

Q: You have three objects of varying shapes and sizes: Object 1 is a rectangular block of tin. Object 2…

A:

Q: (2.6*10^-6)*(2.02*10^4)

A: (2.6*10^-6)*(2.02*10^4) = =(2.6×10-6) × (2.02×104)=(2.6×2.02) × 10-6+4=5.25×10-2

Q: A race car goes around a level, circular track with a diameter of 1.00 km at a constant speed of 85…

A: Given: Diameter of track, d = 1.00Km so, Radius of track, r = d/2 = 0.50km…

Q: How many nL are there in (3.67x10^3) cL

A:

Q: 1:35 Sun, 16 June b III = University of South Australia SP2 2024 Chemistry 100 Week 11 (20/5 - 24/5)…

A: The answer is a. CuO.Sodium chloride (NaCl) has a crystal lattice structure where each sodium ion…

Q: f. Which compounds will increase in amount as a result of this shift? (Enter "correct" for ALL…

A:

Q: A B Choose the best description of the kinds of changes that explain the differences between images…

A: Answer:When a system contains only one type of phase that such system is called as homogeneous…

Q: R= 0.241 kPa * km^-1 convert R to ? kJ*m^4

A:

Q: 6. What is the difference between ACCURACY and PRECISION?

A: Accuracy:The measurement of how close the calculated value to the standard value is said to be…

Q: The answer to  6.626*10^-34 Js (7.40*10^6 m/s)(9.11*10^-28 g)  is  9.83*10^-17 g right? That's the…

A: Here, we have to calculate the given values.

Q: Given the structure below, what is the number of relevant resonance structures in which a negative…

A: The Lewis structure or molecular skeleton is also known as the electron dot structure. It is the…

Q: 0 КО к

A:

Q: 19/22 refers to a joint that is

A:

Q: Jenny Craig promised a 400 lb’s lady to lose an average of 1.10 lb weight every day. How much will…

A: Jenny Craig has made a commitment to help a lady who weighs 400 pounds lose an average of 1.10…

Q: Label the y-axis temperature (℃). Have the y-axis go from -20℃ to 120℃ and have the intervals go by…

A: Graph is a good way of expressing the data in a more convenient manner. Here we can represent data…

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.