Which of the following represents a chemical property of hydrogen gas? O It is not a liquid at room temperature. O It is less dense than nitrogen O It explodes with a flame. O It is tasteless. O It has a low melting point.

Q: Which of the following items is a physical property?     the combustion of gasoline     the…

A: Whthe following items is a -       the combustion of gasoline - Chemical property   the corrosive…

Q: Which of the following is not a property of metals? They are good conductors of electricity. A They…

A: The question is to identify which of the of given properties is not a property of metal -

Q: Mg(OH), is a compound. How many different elements are found in this compound? 3.

A: The substance which is formed by one type of atoms are known as element.

Q: Which of the statements is incorrect? Density is the ratio of the mass of the substance to the…

A:

Q: Which of the following represents a chemical property of hydrogen gas? O It reacts explosively with…

A: To identify: The chemical property of hydrogen gas.

Q: Classify substance as a pure substance or a mixture. If it is a pure substance, classify it as an…

A: Given: Aluminum

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

A:

Q: Which of the following elements is a good conductor of heat and electricity? neon chlorine carbon…

A: Substance having free electrons undergo movement, By movement they conduct electricity.  These free…

Q: All of the following are properties of sodium. Which one is a physical property of sodium? Its…

A:

Q: hydrochloric acid + magnesium → hydrogen gas + magnesium chloride List two physical / chemical…

A: The question is based on the concept of chemical reactions. we have to write physical and chemical…

Q: Which of the following is a chemical property of carbon? O It is a solid at room temperature and…

A: A multiple choice question based on chemical property, which is to be accomplished.

Q: Select the property that is a characteristic of the group 14 (4A) element carbon. O it forms…

A: Group 14 consists of the following elements: Carbon, C Silicon, Si Germanium, Ge Tin, Sn Lead, Pb

Q: Which of the following best describes the system depicted in the diagram? Mixture of elements…

A: We have to say about the diagram.

Q: A pure substance is: O composed of two or more regions with different compositions. O composed of…

A: Here we have to define pure substance.

Q: A solid white substance A is heated strongly in the absence of air. It decomposes to form a new…

A: Given: Solid white substances is heated in the absence of ar to produce a new white substance B and…

Q: If a sample of matter is uniform throughout and cannot be separated into other substances by…

A: element and compound are pure substances that have uniform throughout the composition.

Q: The element silicon has a melting point of 1,410°C and a boiling point of 2,355°C. It is a weak…

A: Since in the question it is given that it reacts with O2 i.e oxygen in air and form SiO2 i.e silicon…

Q: States of matter are distinct forms that different phases of matter take on. How many physical state…

A: Solution - States of matter are distinct forms that different phases of matter take on. 3 physical…

Q: Although some elements are found in an isolated state, most elements are found combined as with…

A: The objective of the question is to find the correct option which describes the statement and fills…

Q: Which of the following is a chemical property? A B C D length of a matchstick color of a matchstick…

A:

Q: A substance composed of 2 or more elements in a fixed, definite proportion is considered a…

A: Answer :- Option C is correct answer.    Compounds   Compounds are made up of two or more elements…

Q: In the process of attempting to characterize a substance, a chemist makes a number of observations?…

A: For Chemical Properties: A chemical reaction needs to be conducted to show the property. For…

Q: Which of the following would be heterogeneous?      A mixture of sand and water.      A mixture…

A: A heterogeneous mixture is a mixture with non-uniform composition or we can say it contains two…

Q: Natural gas is odorless; to alert people to gas leaks, the gas company inserts an additive that has…

A: The speed of the gas molecule is inversely proportional to the mass of the gas molecule. The…

Q: Select the true statement: Mixtures are types of pure substances like compounds and elements The…

A: We have been given four statements related to mixtures, elements and compounds.We have been asked to…

Q: Is there a difference between a homogeneous mixture of hydrogen and oxygen in a 2:1 ration and a…

A: Is there a difference between a homogeneous mixture of hydrogen and oxygen in a 2:1 ration and a…

Q: Chemistry : is the science concerned with composition ,structure and properties of matter as well as…

A: According to the definition of Chemistry , this question can be explained as follows

Q: Which of the following elements is a gas at room temperature? bromine carbon helium sodium

A: We have to find out the element from question which is gas at room temperature.