Which of the following statements is a scientific theory? (a) The energy in an atomic nucleus is found by E = mc². (b) There is the same number of molecules in equal -volumes of gases. (c) If the temperature of a gas doubles, the pressure doubles. (d) The region surrounding the nucleus has negative charges.

Q: Which of the following are extrinsic properties? being made of paper O being to the left of a…

A: An extrinsic property is not essential or inherent to the subject that is being characterized.

Q: Given that 6.02 x 1023 ethanol molecules have a mass of 46.04 g, calculate the number of ethanol…

A: At first, we calculate the volume of the film of ethanol, which is----- 3.08 mm = 0.308 cm 10 cm =…

Q: An empty Erlenmeyer flask weighs 241.3 g. When filled with water (d 5 1.00 g/cm3), the flask and its…

A: Given: Mass of the empty Erlenmeyer flask= 241.3g Density of water = 1.00 g/cm3 Mass of flask filled…

Q: what is chemistry? why is it reliable, flexible and testable?

A: Chemistry is a branch of science, which deals with systematic study of structure, composition and…

Q: 4. How sizing down to Nano affect material properties?

A: Since  substances at the nanoscale level have a greater surface-to-volume ratio, which causes them…

Q: which of the following are chemical changes? which are physical changes? cutting of food,…

A: If the reaction is irreversible and bond making and bond breaking occur in the reaction and then…

Q: Suggest physical changes by which the followingmixtures can be separated.(a) iron filings and wood…

A: Solution-  (a)  iron filings and wood chips we use the magnet separation of this mixture.   (b),  by…

Q: 2. As part of the process in the production of a perfume, a certain substance with water is…

A: It follows first order kinetics.  So, ln(a0/at) = kt  Or, k = (1/t)ln(a0/at) .....(1)  Here, a0 = 75…

Q: The single proton that forms the nucleus of the hydrogen atom hasa radius of approximately 1.0 *…

A: Solution- when 1 m = 100 cm   and 1 m = 1012 pm   now, proton radius =1.0×10-13cm…

Q: The density of air at ordinary atmospheric pressure and 25 ∘C is 1.19 g/L. What is the mass, in…

A: Given, Density is 1.19 g/L The room measurements are 13.5 × 17.5 × 6.0 ft

Q: A Canadian, driving in the U.S.A., fuels their car at a cost of US$3.74 per gallon (US).The current…

A: Amount of the car fuel can be calculated as given below:

Q: Which of the following is a chemical property of tin? O It is easily malleable. It melts at 232°C.…

A:

Q: Which term best describes carbon dioxide, CO2? a. an atom b. an element C. a homogeneous mixture d.…

A: A chemical compound is a chemical substance composed of many identical molecules composed of atoms…

Q: If a cube of table sugar, which is made of sucrose, C12H22O11, is added to concentrated sulfuric…

A: Molar mass of Sucrose (C12H22O11) =12×Molar mass of each carbon atom + 22×molar mass of each…

Q: When a piece of aluminum is placed in a 25-mL graduated cylinder that contains 10.5 mL of water, the…

A: Density is given by the ratio of mass of the substance to that of the volume.

Q: A length of 155 nm can also be expressed as 1.55 x 104 pm 155000 pm O 0.155 pm 1.55 x 10-6 pm

A: 1 nm = 10-9 m 1 um = 10-6 m

Q: zinc and copper are used in the measurement of food. Are there other topics possible

A: A question based on measurement that is to be accomplished.

Q: 2. Which of the following statements is a theory? A. In a reaction, the total mass of reactants is…

A: A) In a reaction total mass of reactant is equal to total mass of products - Law of Conservation of…

Q: 6. How can you use 7. Complete the chart below, cut it out and staple it into your journal.…

A:

Q: State whether the following properties of matter arephysical or chemical.(a) An iron nail is…

A: a.

Q: What are several political, social, or personal considerations that might affect a scientist's…

A: Science is severally affected by culture which includes political, social and religious ideologies.…

Q: sciences, sprang originally from delusions and superstitions, and was at its commencement exactly on…

A: Chemistry is the scientific study of the properties and behavior of matter. It is a natural science…

Q: Complete the table for Experiment 2 and find the kinetic energy of different masses of cars…

A: In the given question we have to calculate the kinetic energy of different masses of cars travelling…

Q: I. Fill in the blanks:- 1. Fundamental unit of matter is 2. The physical state of matter can be…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: 3. What is the volume of a aluminum ball at 10°C if its volume at 160°C is 300cm3 ?

A: Case: I (initial)Initial temperature, T1= 10∘CInitial volume,V1= ?Case:ii  (final) Final…

Q: Suggest 5 topics of educational research for chemistry students

A: Advanced water treatment, water reuse  and challenges faced during process.       May be research…

Q: Express the answers to the following calculations inscientific notation:(a) 145.75 + (2.3 × 10−1)(b)…

A: Scientific Notation: It is a way of expressing number in the form of powers of 10 to specify the…

Q: The mass of a proton is 1.67 times 10-27kg. What is the mass of a proton in gigagrams?

A: The mass of a proton is 1.67 times 10-27kg. This mass of a proton is to be converted into gigagrams.

Q: what is the mass of calcium carbonate reacted?

A: Given, Mass of marble before reaction 3.0g Mass of marble after reaction 1.8g

Q: 2) Which of the following is intensive property? A. The amount of energy produced upon burning…

A: Intensive property is the property of matter which is specific and doesn't change with the amount…

Q: You are given a hammer, a battery, a bulb, wires and switch.(a) How could you use them to…

A:

Q: The contents of one 90. lb bag of topsoil will cover 10. square feet of ground to a depth of 1.7 in.…

A: Given : 1 bag of topsoil will cover area = 10 ft2  And the depth covered by 1 topsoil cover = 1.7 in…

Q: 4R) The recommended adult dose of Elixophyllin®, a drug used to treat asthma, is 6.00 mg/kg of body…

A: Given: Mass of drug = 6.00 mg/kg mass of person = 134lb To find: The mass of dose in mg

Q: Aluminum (Al) – Lithium (Li) alloys are widely used in the aircraft industry to reduce weight and…

A: According to the question we have, The desirable density is given by ρ = 2.50 g/cm3 and we know…

Q: 2-86 When each of the following measurements are length is convert to inches, using a conversion…

A: The conversion factor used in the unit conversion has infinite number of significant digits. In the…

Q: Which of the following statements is FALSE? O The mass percentage of calcium in calcium phosphate is…

A: Answer - The False statement is (e) and (a) The mass percentage of calcium in calcium phosphate is…

Q: If an electric car is capable of going 225 km on a singlecharge, how many charges will it need to…

A: Since 1 km = 0.621 miles The charges as the trip begin with a full charge is calculated as Since 1…

Q: 6. An empty Erlenmeyer flask weighs 241.3 g. When filled with water (d = 1.00 g/cm³), the flask and…

A:

Q: What is the density of water in g/cm3?

A: To find: Density of water in g/cm3 =  ?? experimentally

Q: Describe whether the following are physical or chemical properties. Explain your answer in no more…

A: Introduction: We have to tell whether the following are physical or chemical properties.

Q: Which intensive physical property is observed when the droppings of a person seated inside a closed…

A: Intensive property is the one  does not depend on the amount of substance.

Q: Question attached

A: Theory or Law, though both sounds similar, they are never synonymous. Theory: Suppose, take ‘Bing…

Q: In compounding a prescription, a pharmacist weighed 0.05 g of a substance on a balance insensitive…

A: We have, Weight of the substance measured = 0.050 g Smallest quantity that can be measured = 0.004 g…

Q: 1. Give an example to applications of chemistry in engineering

A: Chemistry is used in the field of engineering directly or indirectly.

Q: 4- Give any branch of chemistry that is widely studied?

A: Given: Branch of chemistry To find: Any branch of Chemistry that is widely studied.  Solution:…

Q: Determine whether the following statements describechemical or physical properties: (a) Oxygen…

A: Note: Since you have posted a question with multiple subparts, we will solve the first three…

Q: Which of the following statements describe physicalproperties and which describe chemical…

A: Physical property - Physical properties are the property of matter which does not change its…

Q: The maximum level that the EPA considers safe for lead air pollution is 1.5 micrograms per cubic…

A: Given : Volume of lungs = 5.30 L And maximum safe level concentration of lead = 1.5 µg/m3

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.