Define the following terms: Homogenous mixture Empirical formula Cathode ray Exp

Question

Define the following terms: Homogenous mixture Empirical formula Cathode ray Explain the state of matter and what are the difference between compound and mixture with examples? If the temperature was 325.5 degree C then what is the temperature in degree F and K, try to select the right option from below: Is this sentence correct or not: The electron has a charge and it's has no mass than other atom contents? Write the chemical formula for the following compounds: Calculate the number of grams for AlCl_3 resulted when hydrochloric acid reacted with aluminum hydroxide, suppose the amount of aluminum hydroxide is 45.267g? How many molecules in the product compound produced by the equation below, use the data given (5.0 ml, and 1.27 g/ml)? 2NH_3 + H_3PO_4 rightarrow (NH_4)_2HPO_4

Explanation / Answer

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Homogenueos Mixture: A mixture is a combination of two or more substances that are not chemically united and do not exist in fixed proportions to each other. Most natural substances are mixtures. A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions.

Empirical Formula: The empirical formula is the simplest formula for a compound. A molecular formula is the same as or a multiple of the empirical formula, and is based on the actual number of atoms of each type in the compound. For example, if the empirical formula of a compound is C3H8 , its molecular formula may be C3H8 , C6H16 , etc. An empirical formula is often calculated from elemental composition data. The weight percentage of each of the elements present in the compound is given by this elemental composition.

Cathode Ray: Cathode rays (also called an electron beam or e-beam) are streams of electrons observed in vacuum tubes. If an evacuated glass tube is equipped with two electrodes and a voltage is applied, the glass opposite of the negative electrode is observed to glow, due to electrons emitted from and travelling perpendicular to the cathode (the electrode connected to the negative terminal of the voltage supply). They were first observed in 1869 by German physicist Johann Hittorf, and were named in 1876 by Eugen Goldstein Kathodenstrahlen, or cathode rays.

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