We can use the same principal we used for the first experiment, Manganese dioxide is not a protein, not an enzyme, it is a catalyst. Due to this, no products are formed, and just as we anticipated, the reaction rate was given a 0. 3. The 3rd experiment is a mixture of 2 mL H2O2 and liver. In this situation, both the substrate (H2O2) and the enzyme (catalase) are present, and
The NMR spectrum does contain impurities including methanol (4.80 ppm), methyl oleate (5.40 ppm), CHCL3 (7.20 ppm), acetone (2.00 ppm), and water (1.60 ppm). The methyl oleate may be present due to incomplete reaction with hydrogen and the CHCL3 may be present due to the contamination of CDCL3 NMR solvent. Acetone was used as a cleaning agent on the apparatus before starting the experiment. The experimental NMR spectrum does match that of an authentic spectrum except the experimental spectrum contains a greater number of peaks due to
4) When naming an ionic compound, which ion is given first? The metal ion is named first 5) Give explanations for the following: a. Argon will not react with any other element It already has a complete number of eight, a full number in its valance shell so it cannot react with itself or another element b. The reaction between sodium chloride gives out a lot of heat and light. The chemical energy of the product is less then the chemical energy of the reactants. This energy is indestructible and is converted to light and heat.
Column 17 is made up of the more reactive gases- the halogens. The noble gases are in column 18. The electrons are the most significant part of an atom. When atoms don’t have the sufficient number of electrons they need in their outer level, they will do whatever they can to get the number they need. The number of protons an atom has is its atomic number.
When atoms bond together they share or transfer electrons to achieve a more stable electron arrangement, often a full outer main level of electrons, like the noble gases. There are three types of strong chemical bonds: 1.__ionic______, 2.____covalent____ and metallic IONIC bonding • Ionic bonding occurs between metals and non-metals • Metal atoms 3. ___lose___ electrons • Non-metal atoms gain electrons • Positive and negative ions are formed Sodium chloride has ionic bonding. [pic] • The sodium ion is positively charged because it has lost a negative electron
The more CO2 produced over this time, the higher the rate of reaction. In this equation, there are 3 possible independent variables: a) changing the size of the marble chips (e.g. large, small, powdered) whilst keeping the mass the same, b) changing the mass of the marble chips whilst keeping the size the same (e.g. all powdered), or c) changing the concentration of the hydrochloric acid. In equation 2, the hydrogen is measured by the loss of mass.
A) Subscripts in the reactants must be conserved in the products. B) Coefficients are used to balance the atoms on both sides. C) The law of conservation of matter must be followed. D) Phases are often shown for each compound but are not critical to balancing an equation. E) All of the above statements (a-d) are true.
Test #2 ANSWERS CHM 101 Part I Multiple Choice (2 points each) 1. Which element is most likely to form three covalent bonds? A) C B) Si C) P D) S E) Se 2. A chemical bond formed when two atoms share two pairs of electrons is a ________ bond; it is best described as ________. A) double; covalent B) double; ionic C) single; covalent D) single; ionic E) triple; covalent 3.
O O O O O O O O I I I O O O O O O I O O O I I O The top three are equally important. The first two on the bottom are of equal importance. I think the bottom right two will be most important (fewer formal charges), then maybe the bottom left structure (maximize bonding), then the top three structures. The order of importance isn’t entirely clear between the last two groups. (Argument between maximize bonding and put negative charge on the more electronegative atom.)
Alkaline Earth Metals IS made up of six elements. It’s the second group on the periodic table. All alkaline earth metals have an oxidation number of +2, making them very reactive. Because of their reactivity, the alkaline metals are not found in nature.All of the Alkaline earth metals except magnesium and strontium have at least one naturally occurring radioisotope Noble Gases is made up of six elements on the periodic table which are in the last group on the periodic table. There are actually now seven elements in the noble gases.