Answer to: Determine whether the statement is a pure substance or mixture. List all of the different phases present: a bromine liquid and its vapor...
Is carbon dioxide gas a substance or a mixture? Explain. A mixture of carbon and sulfur has a mass of 9.0 g. Complete combustion with excess O2 gives 29.7 g of a mixture of CO2 and SO2. 2.4 g of a compound of carbon, hydrogen and oxygen gave on combu...
Its vapor can form explosive mixture with air. Its explosion limit is 2.0% to 12% (by volume). It belongs to a moderate explosive hazardous material and flammable, low toxic substance. The toxicity of its vapors is twice as high as ethanol while oral administration causes the opposite ...
• Compound- A substance composed of two or more elements that are chemically bonded to form a new substance with different properties. • Example 1- Water. Water’s chemical formula is H2O. • Mixture- a combination of substances in which ...
A‘catalyst’ is a substance that accelerates a chemical reaction, and within a catalytic converter, there are two types of catalyst. The first is a reduction catalyst which uses platinum and rhodium within the honeycomb to reduce NOx emissions. NOx is produced by nitrogen oxide and nitrogen dio...
Hydrazine, N2H4, a substance used as rocket fuel, reacts with oxygen as follows: N2H4(l)+O2(g)-->NO2(g)+H2O(g) How many grams of oxygen are needed to react with 150 g of hydrazine? What is the limiting reacta...
The invention provides a method for preparing a 1-benzotriazolylcarbonate ester of a water-soluble and non-peptidic polymer by reacting a terminal hydroxyl group of a water-soluble and non-peptidic polymer with di(1-benzotriazolyl)carbonate in the presen
The solubility of a substance is the amount of the substance or solute that will give a saturated solution with a specific amount of solvent, that is, when the maximum amount of solute that can be dissolved in that solvent has been attained. The solubilities of different substan...
Whereas the total content of SCFAs at 48 h was lower than that at 24 h, which might attribute to the metabolism of gut microbes or substance transformation (Fu et al., 2018, Geirnaert et al., 2017). GOS greatly promoted the production of acetate, but rarely in production of other ...
The allergen used for immunotherapy may be a single allergenic substance or a mixture of such substances, for example a mixture of proteins. It may be a partially or fully purified extract, such as a pollen extract, a recombinant protein, a hypoallergen or peptide derived therefrom. For exampl...