Ammonia gas would be classified as (1) a compound (2) a mixture (3) an element (4) an atom

Q: A principal shell with a value of n=3 would contain s,p,d, and f orbitals true or false

A: A principal shell is indicated by the principal quantum number.

Q: A substance formed of crystals of equal numbers of cations and anions held together by ionic bonds…

A: Answer is b.)  salt.

Q: a) Identify the following as element (atomic or molecular), compound or mixture. b) Explain your…

A: An atom of a element is composed of a single nucleus with a unique number of protons surrounded by…

Q: Chlorine has seven electrons in its valence shell. It accepts an electron to complete its octet and…

A: The chloride ion acts as an electrolyte and is present in all bodily fluids. It helps in the…

Q: Generally YAC contains how many elements?a) 1b) 2c) 3d) 4

A: YAC stands for yeast artificial chromosomes and is widely used in the field of genetic engineering.…

Q: Assume that the mixture of substances in drawing (a) undergoes a reaction. Which of the drawings…

A: The law of conservation of mass states the mass in an isolated system is neither created nor…

Q: What does it mean to say that a substance is radioactive?

A: A substance composed two or more elements bonded together via chemical bonds is known as a compound.…

Q: Elemental analysis of a compound with molar mass 342.3 g/mol gives the following mass percent…

A: Given Percentage of C= 42.11 %  Percentage of H=6.48 %  Percentage of O=51.41% To Calculate:…

Q: The atomic number on an element tells us the number of

A: An atom is made up of three kinds of subatomic particles called protons, neutrons, and electrons,…

Q: Which elements in each pair is more metallic? Silicon or aluminum

A: Introduction: A pure substance that can't be separated by compound methods, comprising of molecules…

Q: What does the atomic number tell us about an atom

A: The atomic number which is denoted by Z of a chemical element uniquely identifies the chemical…

Q: The atomic mass number of an atom is determined by the sum of the number of in the atom. (a) protons…

A: The total number of neutrons and protons in an atomic nucleus is called atomic mass number.

Q: The atomic mass of an element can be used to determine A) the chemical properties of the element…

A: Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of…

Q: What element does not react with other elements? Group of answer choices A. hydrogen B. helium C.…

A: Noble gases These are group 18 elements of the periodic table. They are usually chemically inert.…

Q: Arrange in order of increasing atomic size. (a) the period 2 elements Li, C, and F (b) the group…

A: According to the question, we have to arrange the following period or group elements in order of…

Q: Some dried beans with a 14C/12C ratio one-eighth of the current value are found in an old cave. How…

A: The primary way for the age determination of an old sample is carbon dating. The carbon-14 is…

Q: What is the difference between an a particle and a helium atom?

A: Alpha particles - Alpha particles consist of two protons and to neutrons bound together into a…

Q: a certain element consists of two stable isotopes. the first has a mass of 138 amu

A: Atoms of an element having same atomic number but different mass number are called isotopes of that…

Q: How many total atoms would be in one formula unit of (NH4)3PO4? 20, 4, 18, 16

A: Ammonium phosphate fertilizes lawns that are deficient in nitrogen and phosphates. Ammonium…

Q: In the accompanying figure, the atomic number refers to the:

A: The given is C (carbon) The atomic number is 6 The mass number is 12

Q: Which do you think has a higher boiling point, pentane or neopentane (2,2-dimethylpropane)? Why?

A: The boiling point is the temperature at which the pressure of the liquid changes to the state of the…

Q: Which element is likely to lose an electron more easily, Mg or S?

A: Valency of an element is the combining power or combining capacity of the element  with other atoms…

Q: Which elements would be more likely to make a compound with another element

A: In chemistry an element very basic part of any molecule and it is a pure substance consisting only…

Q: If you add an electron to fluorine, what will result? A) a negatively charged anion O B) a different…

A: Anion: negatively charged ion. Cation: positively charged ion.

Q: the following? A. Thiamine B. Selenium C. Zinc

A: The clinical scenario is suggestive of keshan  disease which is an endemic cardiomyopathy found in…

Q: _____________ compounds exclude water.

A: Rule of thumb that states that "like dissolves like" which means that polar molecules are dissolved…

Q: Which equation represents a chemical reaction that obeys the law of conservation of matter? O…

A: Mass cannot be produced nor be destroyed, it can be converted So the reaction in which equal number…

Q: In the periodic table, the elements are arrangedaccording to ________ .a. size c. mass numberb.…

A: A periodic table is a tabular table. It displays all the chemical elements in this table. Over time…

Q: A metal ion with a 2+ charge has 23 electrons and forms a compound with a halogen ion that contains…

A: As we know that atomic mass is the addition of proton and neutrons present in the nucleus, whereas…

Q: Name several inorganic compounds.

A: Inorganic compounds: These are those compound which does not contain hydrogen and carbon bond where…

Q: Fluorine has an atomic number of 9. Which of the following is true of fluorine? D A. It will lose an…

A: It will gain an electron to become an anion. Cations are positively charged species. Anions are…

Q: Table salt (sodium chloride) is made up of sodium and chlorine. We are able toeat the compound,…

A: Table salt is sodium chloride. It is made up of sodium and chlorine. Sodium is a metal and chlorine…

Q: In H2O how many hydrogen (h) atoms are present

A: Answer- 2 atoms. In H2O 2 hydrogen atoms are present.

Q: water 4.18 ethyl alcohol 2.44 benzene 1.80 sulfuric acid 1.40 ased on the information in the table,…

A: INTRODUCTION One of water's most significant properties is that it takes a lot of energy to heat it.…

Q: Why do you think compounds containing the heavy metal lead are poisonous?

A: Heavy metals are chemical elements that have high density and very toxic or poisonous even at their…

Q: Match the structure formula to the chemical formula for this substance

A: According to the question, a molecular structure is given. Now, we have to match the structural…

Q: How many H2O particles were produced by creating the following structure? R H R R -N-Ç, H-N-C,- H H…

A: Extention of a polypeptide chain is a typical dehydration reaction where OH from carboxyl group and…

Q: Which of the following is a hydroxide ion?     H3O +     H +     H2O -     OH -

A: Hydrogen is defined as the chemical element, having the symbol H. It has the atomic number 1. The…

Q: OCCURS IN WATER WITI 1. cobalt 2. strontium 3. selenium 4. vanadium

A: Osteoarthritis, also known as degenerative joint disease (DJD), is one of the most common type of…

Q: What is the purpose of subscripts in chemical formulas? So the chemist can multiply the chemical…

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

Q: How can you tell in an IR spectrum if the compound has just one or two oxygens? What is the…

A: Infrared Spectroscopy or IR spectroscopy is the study and measurement of interaction between the…

Q: In 5H2O how many hydrogen (H) atoms are present

A: Hydrogen atom is chemical atom which has atomic mass and number as 1. It has a single proton In it's…