Select all the true statements.Two different substances can be composed of different chemical elements.Two different substances with crystal structures can be composed of the same chemical elements in the same ratio and also have the same arrangements of atoms.Molecules of two different substances can be composed of the same chemical elements but have different numbers of atoms.Submit

Two substances can be composed of the same chemical elements and still be different.The molecules represented below are all composed of carbon and hydrogen. But each kind of molecule makes up a different substance. These substances are different because their molecules have different numbers of carbon atoms and hydrogen atoms.First, select the model of a molecule composed of two carbon atoms and six hydrogen atoms.HCethane propene ethyne Next, select the chemical formula for the substance composed of these molecules.C2H6C2H2C3H6Submit

Two substances with crystal structures can be different even if the substances contain the same chemical elements in the same ratio. These substances have the same composition, but they are different because their atoms are arranged in different ways.Select the two models that represent substances with the same chemical formula but different arrangements of atoms.CSngraphite beta tin alpha tin Submit

According to the modern atomic theory:Question 6Select one:a.Chemical reactions do not change the way the atoms are combined in compounds.b.Chemical compounds consist of atoms combined in specific ratios.c.All matter is not composed of atoms.d.The atoms of a given element are the same as atoms of all other elements.

Which of the following is true about compounds?1 pointthey can be physically separated into their component elementsthey have compositions that varythey have properties to those of their component elementsthey are substances made of two or more elements bonded together

Which of the following statements is true?A mixture has two types of particle chemically bonded together.A pure substance is made of two or more substances that are not chemically joined.You can change the proportion of substances in a mixture.