How many major plates does the Earth have?

Q: Part C How many Rh atoms would have to be placed side by side to span a distance of 7.5 µm ? Express…

A: Atom is the smallest  unit of ordinary matter which forms a chemical  element.

Q: Question 4. New April 19, 2021. 1) Define physical properties?. Give 3 examples. 5) What is the…

A: a). Physical properties can be observed or measured without changing the composition of matter.…

Q: K The material labeled K contains elements that do not conduct heat or electricity well The…

A: We have to name the elements from periodic table from given choices of options having similar…

Q: 14 14 1. 6C 7 N+ 1H 14 1N -le le

A: In this question we have to find the missing part in the radioactive decay.

Q: What are the difference between the properties of Metal and the properties Ceramics materials? use…

A: Metals are solid substances that are opaque in appearance and have a high electrical conductivity.…

Q: What type of metal is this? Aluminum, Copper, Lead or Iron?

A: Specific heat of metal in cal/g˚C is 0.220 Specific heat of metal in J/g˚C is 0.920.

Q: The density of carbon lellacinun tetrachloride? 3.3 x 1023 atoms b. 5.4 x 1023 atoms c. 1.4 x 1024…

A: Number of moles of a compound = number of moleculesavagadro number Number of moles of a compound =…

Q: Examples: CCO, + HNO, → Zn(NO,)2 + Na,PO, → Practice: AGNO, + NaCI > HCI + AGNO, → Na,SO, + BaCl, →

A: Given :-  CaCO3 + HNO3 →  Zn(NO3)2 + Na3PO4 →  AgNO3 + NaCl →  HCl + AgNO3 →  Na2SO4 + BaCl2 →…

Q: Use the information and models to answer the following questiön. A group of students are trying to…

A: Electrical conductive material are those which can transfer charge from one end to other end.

Q: when do sulfur and iron change their physical properties?

A: When iron and sulphur reacts, they form a compound iron sulphide (FeS)

Q: why is the arrangement of the constituent atoms or molecules more important in determining the…

A: Three state of matter solid , liquid and gas. The arrangement of atoms or molecules in the lattice…

Q: Describe a patterns/trends in a PHYSICAL property as we move down group 1 and group 7? Group 1 Group…

A: To find: Physical property down the group 1 and group 7

Q: Which branch of chemistry studies the composition of substances? The environmental impact of…

A: Chemistry involves the systematic study of various branches related to molecules wherein every…

Q: How many corner atoms are shown in this image? number of corner atoms: What fraction of each corner…

A: In any cubic unit cell Corner-8 Face -6  Center-1 Edge -12

Q: The radius of a aluminum atom is 143 pm. How many aluminum atoms would have to be laid side by side…

A: Given : Radius of Aluminium atom = 143 pm And length of line to be made = 4.38 mm  Since 1 pm =…

Q: Oil spreads on the water to form a film 110nm thick. How many square kilometers(Km²) of the ocean…

A: The oil and water are two immiscible liquids which means that the oil cannot be dissolved in water.…

Q: A chemist has a 19.50g sample of drinking alcohol (ethyl alcohol). what is the volume ogf the…

A: The relationship between mass and volume is given below.

Q: what is the total mass of metal present in the container

A: For addition, calculate the significant figures of all the numbers. The sum, will have the least…

Q: 22) An 85.5-g sample of Hg in a barometer 23) A 0.251-g Ti metal heart valve 24) A 10.0-g sample of…

A: 22) Given: Mass of Hg = 85.5 g Atomic mass of Hg = 200.59 g/mol.

Q: . The electrolysis of water into hydrogen and oxygen is an example of ______ reaction. A.…

A: The electrolysis of water into hydrogen and oxygen is an example of decomposition reaction so…

Q: Is the volume of H2 produced larger than the volume of O2 producedbecause (a) hydrogen atoms are…

A: Given: The volume of H2 produced is larger than the volume of O2

Q: Odd one out *   a. Shape of land surface b. Topsoil c, Slope of land d, Land position

A: Since you are posted with multiple questions. As per the rule, I am answering the first question…

Q: When solid NaCl dissolves in water Na + cations and Cl anions leave the solid crystal and are…

A: NaCl is an ionic compound that is composed by sodium ions and chloride ions. It forms face-centered…

Q: What is a molecular element?

A: A compound refers to the molecule which contains at least two different type of elements bonded…

Q: The planet Zoltan is located in a solar system in the Andromeda galaxy. On Zoltan, the standard unit…

A: We need to consider the units used on the planet Zoltan.

Q: a chemist has 19.50g alcohol. what is the volume of the sample, what additional information is…

A: The volume of a given liquid is defined as the amount of the space occupied by the liquid that fully…

Q: If limestone is interacted with an acid, it liberates a gas made from: a. water vapor b. methane…

A: Limestone is the common name of the salt CaCO3. It reacts with acid to form corresponding salt along…

Q: 1.NABH4 ? с) 2. Нао co,C2H5 1. Hg(OAc)2/THF/H2O ? d) 2. NaBH,ГОН

A:

Q: 27. When it rains on you, which process just occurred? 28. In which state of matter is atmospheric…

A: A) When it rains, the condensation process takes place. Water evaporates from the earth's surface in…

Q: High-density lipoprotein (HDL) cholesterol is the “good” cholesterol because adequate levels reduce…

A:

Q: A match is lit and held under a cold piece of metal. The followingobservations are made: (a) The…

A: Physical changes are those in which change is physical appearance takes place like smell, heat etc.…

Q: 2 .What is the 2nd most prevalent element in soil (name, not symbol)?   3. What is the name of the…

A:

Q: What do metals and nonmetals have in common? A both have high melting and boiling points B both are…

A: Metals are those elements which donate electrons. Non metals are those elements which accept…

Q: 3 Carefully put an egg in a glass half filled with vinegar. Replace the vinegar on the secohd day.…

A:

Q: If atoms are mostly empty space and atoms compose allordinary matter, why does solid matter seem to…

A: The reason why solid matter does not have space within it has to be explained.

Q: What observations did Antoine Lavoisier make? What law did he formulate?

A: Antoine Lavoisier make an observation that in a chemical reaction matter is neither created    nor…

Q: What is the si unit for the distance from earth to the sun

A:

Q: What three elements are found in chlorofluorocarbons?

A: The three elements that are found in chlorofluorocarbons has to be given.

Q: Why are the chemical elements important in the Big history story?

A: A chemical element, also called an element, is anything that can decompose into simple substances…

Q: Which of the following will be homogeneous mixture?    (A) All of them (B) N2 and Ar (C)…

A:

Q: Nitrogen makes up what fraction of the mass of the hum Body? Nitrogen makes up what percentage of…

A: 1.Fraction of Nitrogen in mass of human body  70 kg  of Nitrogen is 1 fraction   2.2 Kg   of…

Q: In simple terms, what is the difference between a theory and a law

A: Theory and laws are interrelated . Law  According to science , law is generalised statement  based…

Q: 1.) Liquid water molecules escaping from the surface enter into the Blank. What is the blank?

A: Liquid water molecules escaping from the surface enter into the ......

Q: , which among GaAs, LiBr, C, and Li will be the greatest conductor

A: Substance which has more number of ions have more electrical conductivity.  So, strong electrolytes…

Q: What is the chemical composition of crystals? More so, what vegetables and type of crystals may be…

A: Answer - According to the question -  Chemical composition of crystals - A crystal is a material…

Q: In water conversation, chemistry spread a thin certain inert materials over the surface of water cut…

A: Given that: Volume of the inert oil, V = 0.10 mL Area for the oil spreading, A = 42.9 m2 First of…