Q2/ calculate the accuracy from these results: (Arrange your answer in the same table) Element Measured Global value 118 Accuracy value Ppm Zn 129 Cu 66 66 Co 16 13 Ni 28 27 Pb 100 130 Cr 93 Sr 32 40 Mn 1000 870 3. 96

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: 15. This ForeverspinTM top os made of pure carbon, with an Atomic Mass of 12. This top weights 9…

A: P

Q: ốc -N+ 14 14 21. 6C 7N+ le ON 14 -1e 1H

A: To solve this problem we have to know about Beta Decay .

Q: Which of the following is the best reducing agent? O Ba2+ O Ca(s) O Mg2+ O Mg(s) O Ba(s)

A: We have to choose the best reducing agent among the following given options as follows in step 2:

Q: Question 7 Which pure substance below is composed of more than one element? O Hydrogen (H) O Radium…

A:

Q: Balance the following using the algebraic method: 1) CH3ONA + NaCIO2 + HCI → COCI2 + NaCl + Н20

A: The reactions in which oxidation and reduction occur are known as redox reactions. A balanced…

Q: Questions: 1. Write the transition metals that you tested in order from 2. Find copper, iron, and…

A: 1) Osmium is most dense transition metal with density of approx 22.59g/cm³c Whereas scandium has the…

Q: The recipe for an ice cream sandwich is given below. 2 cookies + 4 oz ice cream = 1 ice cream…

A:

Q: Add mathematical symbols (+, -, *, /, v, !, etc.) to make the following expressions true. For…

A:

Q: Composition C-4 is a plastic explosive having a density of 1.05 g/cm3. Calculate the mass of a brick…

A: Given,  Density (D) of C-4 plastic explosive brick = 1.05 g/cm3 Volume (V) of C-4 plastic explosive…

Q: The planet Mars orbits 2.279 x 10¹¹ m from the Sun. Express the distance using the appropriate…

A: 1m = 10-3 mm1 km = 1000 m1 nm = 10-9 m1 Gm = 109 m

Q: A piece of iron weighs 3.5 x 108 ug (microgram). What is the weight of the iron in kilograms (kg)?…

A: The conversion of quantity from one unit to another unit is known as unit conversion. During the…

Q: A student performed an analysis of a sample for its calcium content andgot the following results:…

A: The question is based on the concept of analytical chemistry. we have to explain regarding accuracy…

Q: The density of a metal will vary depending on the size of the sample. Group of answer choices True…

A: False,  The density does not change with variation in size of metal. This is because with decrease…

Q: Question 5/ 10 If 10.0 ml of an unknown sample of phosphorie acid was titrated against 0.12 M…

A: Volume of phosphoric acid=10.0mL Concentration of NaOH=0.12M Volume of NaOH=10.30mL Concentration of…

Q: Since the Geologists at Grasberg know the density of gold to be 19.32g/cm^3 they were surprised by…

A: Density is defined as mass per unit volume of the substance  . Metals have high density as compared…

Q: The first box is the key. The second box represents.... 00 00 00 00 00 0 00 OO OO Atom Y: O Atom Z:…

A: Pure substances are those substances which are made up of only one type of elements. These cannot be…

Q: A copper atom has a mass of 1.06 x 10 - 22 g and a penny has a mass of 2.5 g. Use this information…

A: Given,  Mass of 1 copper atom = 1.06 × 10-22 g Mass of a penny = 2.5 g Mass of 1 mole of copper…

Q: Write the following metals using Roman numeral notation. Then, explain why the Roman numeral differs…

A:

Q: If the radius of a neutron is 1.0 x 10-13 cm, calculate the density of a neutron in g/cm3 . (volume…

A: Given, radius(r) = 1.0 × 10-13 cm we know that the neutron is spherical in shape so the volume of…

Q: A. PHYSICAL PROPERTIES OF ELEMENTS AND COMPOUNDS Using the information obtained during the…

A: Element is pure form of substance consist only one type of atoms

Q: What is the mass, in g, of 2.67 × 10 nickel (Ni) atoms? Enter your answer in scientific notation. 12…

A: The given data contains, Atoms of nickel = 2.67×1012 Molar mass of Nickel = 58.69 g/mol.

Q: You will need to take logs and antilogs to solve many chemistry problems. For practice, complete the…

A:

Q: The given statements are from a description of the element lead in a reference handbook. Classify…

A: Qualitative data : This data describes qualities of a material, usually without values. Quantitatuve…

Q: The radius of a hydrogen atom is 37 pm (1pm 10-12m). How many hydrogen atoms lined up side to side…

A:

Q: (Incorrect) A 56.20 g sample of a compound containing potassium, chromium, and oxygen is analyzed as…

A: Given : mass of sample = 56.20 g       Mass of potassium = 14.94 g  Mass of chromium = 19.87 g

Q: The U.S. Government has about 1.23 * 107 pounds of gold in Fort Knox. How much is it worth at…

A: 1.23 X 107 pounds of gold = 12 X 1.23 X 107 Toz = 14.76 X 107 Toz

Q: When a 8.000 g of mineral ore sample containing Sn(CO3)2 (238.7 g/mol) and other inert material was…

A: Given that,  8.000 g of a sample containing Sn(CO3)2 and other inert material was is treated with…

Q: Use the conversion factor 1 amu = 1.66054 x 10-24 g to answer the questions. How many atomic mass…

A: Given: 1 amu = 1.66054×10-24 g

Q: Calculate the mass (in g) of oxygen in a 76.9 g sample of Ni(BrO4)2 (MM = 346). Report your answer…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: Percentage Abundance. The element rubidium consists of two isotopes, one having an isotopic mass of…

A:

Q: Calculate the boiling point of a 4.5 m solution of Na2SO4 in water assume 100% dissociation, Kb…

A: Given data: Molality = 4.5 m. Kb of water = 0.52 oC/m. To calculate the boiling point of the Na2SO4…

Q: late the number of boron atoms in a 120.0 g sample of tetraborane (B₂H₁ re your answer has a unit…

A: Mole is equal to weight of substance divide by it's molar mass

Q: Given the data and information in the prompt, what is the calculated absolute error on the percent…

A: Absolute Error is the amount of error in your measurements. It is the difference between the…

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.