The names and chemical formulae of some chemical compounds are written in the first two columns of the table below. Each compound is soluble in water. Imagine that a few tenths of a mole of each compound is dissolved in a liter of water. Then, write down in the third column of the table the chemical formula of the major chemical species that will be present in this solution. For example, you know water itself will be present, so you can begin each list with the chemical formula for water (H₂O). Note: "major" chemical species are those present in concentrations greater than 10-6 mol/L. compound sucrose nickel(II) chloride sodium nitrate formula C12 H₂2 011 NiC1₂ NaNO3 major species present when dissolved in water U 0 0 X U 0,0 S

Think about the situation where you are investigating the relationship of study time vs. exam grade.a. Which variable would be on the x-axis (and why)?b. Which variable would be on the y-axis (and why)?c. Would you expect the slope to be positive or negative (and Why)? 2) Contrast and compare interpolation with extrapolation. Which is “safer” to use and why?3) Look up how “the best fit straight line” is constructed. The term “Least squares” should be in your explanation.4) If I plot some data and end up with a r2 of (-) 0.99, is my plot useless? Explain.

Calculate the mass in grams of each sample 4.8×1025 O3 molecules to g Express your answer using two significant figures.

Value Number of sig figs 301.50 0.0500 2650 7.560 x 1023

(b) Manuel is driving at a constant speed. He then slows down to pass an accident. After passing it, he goes back to his original speed and continues driving at that speed. Speed Speed Speed Speed Time Time Time Time Explanation Check

online practice top 3

Can I get research question examples In chemistry lab

Discuss the language demands included in the lesson on mixing substances in a 5th-grade classroom by Identifying key vocabulary terms students must know in order to master the learning objectives for the lesson based on the below standard and learning objective. Standard Conduct an investigation to determine whether the mixing of two or more substances results in new substances. Learning Objective Given a variety of substances and safety equipment in a classroom setting, students will be able to conduct an experiment to mix two or more substances and observe the results. They will be able to correctly identify whether a new substance has been formed as a result of the mixing, based on observable changes such as color change, formation of a precipitate, or change in temperature, with at least 80% accuracy.

Please someone can help me with chemistry homework Thank you

A particular beer is 6.50 % ethanol by volume (C2H6O). If a single bottle of beer contains 750.0 mL of beer, what mass, in g of ethanol (C2 H6O), is present in the bottle? The density of ethanol is 0.789 g ethanol/mL ethanol.