Is it physically possible to separate table salt, sodium chloride, NaCl (a white soiled that is water soluble), from table sugar, sucrose, C12H22O11 (a white solid that is water soluble)? Explain your reasoning.
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Is it physically possible to separate table salt, sodium chloride, NaCl (a white soiled that is water soluble), from table sugar, sucrose, C12H22O11 (a white solid that is water soluble)? Explain your reasoning.
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- Which of these statements are qualitative? Which are quantitative? Explain your choice in each case. (a) Sodium is a silvery-white metal. (b) Aluminum melts at 660 C. (c) Carbon makes up about 23% of the human body by mass. (d) Pure carbon occurs in different forms: graphite, diamond, and fullerenes.Consider Molecule X, which is found in all living cells. This single-strand nucleic acid folds into a compact shape and forms a large complex with about 80 proteins. This complex is responsible for synthesizing new proteins in a living cell. What is the name of X? Your answer should be one word, or a short two- or three-word phrase. Spelling counts. Note: if there is more than one possible answer, separate each answer with a comma. ☐ ×2. Explain the difference between (a) nanoscience and nanotechnology (b) nanomaterial and nanoparticle
- we have four potatoes. Two are connected by a string, so they're tied together. Two are just sitting there near one another, but aren't connected and are free to roll around. Which of these potato pairs would the N2 represent, and why?d) Which of the following substances can be considered chemically pure? ● ● Air ● Apple juice Brass Seawater ● A bar of 24-karat goldThe German chemist Fritz Haber proposed paying off the reparations imposed against Germany after World War I by extracting gold from seawater. Given the following data, what was the dollar amount of the gold that could have been extracted from 3.0 m3 of seawater? The price of gold at the time was $0.68 per gram of gold. Gold occurs in seawater to the extent of 5.15 x 1011 atoms per gram of seawater. The density of seawater is 1.03 g/cm3.
- In a lab, you are asked to determine the identity of 4 unknown compounds, A, B, C, and D. These compounds are ethane, ethanol, ethyl ethanoate, and ethanoic acid, but you don't know which is which. Using the table of physical properties below, identify each compound and justify your reasoning.Suppose the metallic paper clips (which contain iron) had been replaced by magnesium or nickel. Would using a magnet as a method of separation have worked?The formula for lactose is C12H22O11, and the monohydrate is C12H22O11H2O. What is the percent by weight of lactose in lactose monohydrate? If you weigh 2.500 g of lactose monohydrate, how many grams of lactose are present?
- A new compound has the empirical formula GaCl2. Thissurprises some chemists who, based on the position of gallium in the periodic table, expect a chloride of gallium to have the formula GaCl3 or possibly GaCl. They suggest that the “GaCl2” is really Ga[GaCl4], in which the bracketed group behaves as a unit with a -1 charge. Suggest experiments to test this hypothesisWrite balanced complete ionic equation for CaS(aq) +CdCl2 (aq) → CdS(s) + CaCl (aq). Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣφ You have already submitted thinWhat is the chemical composition of crystals? More so, what vegetables and type of crystals may be found in these vegetables?