took the test and got the answer right
Answer: The correct answer is C) 3.33 grams
Explanation: 1/8 of the initial 10 grams is a little more than 1 gram, while 1/16 of 10 grams is a little more than 1/2 gram. The only answer that falls in that range is 1.00 gram. Use the integrated rate equation: ln(g0/gt) = kt, also ln(2) = kt1/2. Therefore k = (0.693)/36 min = 0.0193 min-1. In addition to the specific chemical properties that distinguish different chemical classifications, chemicals can exist in several phases. For the most part, the chemical classifications are independent of these bulk phase classifications; however, some more exotic phases are incompatible with certain chemical properties. A phase is a set of states of a chemical system that have similar bulk structural properties, over a range of conditions, such as pressure or temperature. Physical properties, such as density and refractive index tend to fall within values characteristic of the phase. The phase of matter is defined by the phase transition, which is when energy put into or taken out of the system goes into rearranging the structure of the system, instead of changing the bulk conditions.
Sometimes the distinction between phases can be continuous instead of having a discrete boundary' in this case the matter is considered to be in a supercritical state. When three states meet based on the conditions, it is known as a triple point and since this is invariant, it is a convenient way to define a set of conditions.
The most familiar examples of phases are solids, liquids, and gases. Many substances exhibit multiple solid phases. For example, there are three phases of solid iron (alpha, gamma, and delta) that vary based on temperature and pressure. A principal difference between solid phases is the crystal structure, or arrangement, of the atoms. Another phase commonly encountered in the study of chemistry is the aqueous phase, which is the state of substances dissolved in aqueous solution (that is, in water).
Answer: mass of reactants
Explanation: According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
Reactants of a chemical reaction is defined as the substances which take part in a chemical reaction and undergoes a chemical change. Reactants are written on left side of the arrow.Products are defined as the substance which are formed at the end of the chemical reaction.Products are written on the right side of the arrow.
Mass of Carbon = 12 g
Mas of Oxygen = 32 g
Mass of Carbon dioxide = 12+2(16)= 44 g
Thus mass of products is equal to mass of reactants in a balanced chemical equation.
Pure substances that have properties entirely different from the atoms that make it up are called compounds. All compounds are made up of molecules, but not all the molecules are compounds. Compounds are composed of more than one mixture of atoms. An example of this is Hydrogen Gas, it is a molecule but it is not a compound because it is only made of only one element. But when Hydrogen is mixed with Oxygen, it forms water, which is now a compound because of the mixture of two hydrogen and one oxygen atoms.
Answer:The correct answer is option b.
The equilibrium constant expression is given as:
The acid dissociation constant is product of equilibrium constant and concentration of water.
Hence,from the given options the correct answer is option b.
Electronic configuration is defined as the distribution of electrons in the energy levels around an atomic nucleus.
Atomic number helps in determining the electronic distribution of an atom. We write electronic configuration according to Aufbau's principle in which shells are arranged in increasing energy levels.
Aluminium (Al) is a p block element and its atomic number is 13.
Electronic configuration of aluminium is .
Excite state is achieved when the electron moves to a higher energy level.The 3s electron moves to 3p orbital so that it can form three bonds.
Thus Electronic configuration of aluminium in an excited state is .
How does the law of conservation of mass apply to this reaction: C2H4 + O2 → H2O + CO2?