the states that the total energy of the universe is constant. When heat exits the system during a process, the enthalpy change is The process is said to be is the technological process of measuring the heat released or absorbed during a chemical or physical process. The diagram to the right illustrates a

For the following reaction, 32.7 grams of zinc oxide are allowed to react with 6.36 grams of water. Zinc oxide(s)+water----zinc hydroxide(aq) , what is the maximum mass of zinc hydroxide that can be formed?  what is the formula for the limiting reagent? what mass of the excess reagent remains after the reaction is complete?

You send off a soil sample what is the soil CEC and Base Saturation Element PPM MW Al +3 Ca Y2 Mg x2 360 27 240 40 220 24 180 39 Na 170 23 15 1

A mass spectrometer is being used to separate common oxygen-16 from the much rarer oxygen-18, taken from a sample of old glacial ice. (The relative abundance of these oxygen isotopes is related to climatic temperature at the time the ice was deposited.) The ratio of the masses of these two ions is 16 to 18, the mass of oxygen-16 is 2.66 ✕ 10−26 kg, and they are singly charged and travel at 7.40 ✕ 106 m/s in a 1.40 T magnetic field. What is the separation (in m) between their paths when they hit a target after traversing a semicircle?

Each sketch below shows three objects with an electric charge. In each case, decide whether there is a net force acting on the object outlined in green. If there is a net force, decide whether it pushes the green-ring object to the left or right. Then select the appropriate button under the sketch. For example, if there is a net force pushing the green-ring object in the first sketch to the left, select the left button under the first sketch. If there is no net force on the green-ring object in the second sketch, select the middle button under the second sketch. And so on. I Don't Know Submit X ✪ n tv © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center Acce A zoom

Please help me solve this answer (this is my last attempt, so it cant be wrong)

Answer the questions in the table below about the shape of the phosgene (COCI₂) molecule. How many electron groups are around the central carbon atom? Note: one "electron group" means one lone pair, one single bond, one double bond, or one triple bond. What phrase best describes the arrangement of these electron groups around the central carbon atom? (You may need to use the scrollbar to see all the choices.) 0 (choose one) X Ś

What volume (in mL) of 15.921 ppt K+ (39.0983), with a density of 1.01 is needed to provide 8.31 x10-4 g of potassium ion? Show all needed work on your scratch paper.

Answer both questions please it wouldn't hurt 1) For the following write out the Ksp expression: Note: If the ion doesn't have a superscript add in "1" and start with the cation then the anion.   Example of format: CuCl2 (s)   Ksp = [Cu^2+]^1[Cl^1-]^2   (a) CaF2 (s)   Ksp = []^[]^   (b) Al2S3 (s)   Ksp = []^[]^[]^ 2)  Calculate the silver ion, of a solution prepared by dissolving 1.00 g of silver nitrate and 10.0 g of KCN in sufficient water to make 1.00L. Kf = 1.00 x 1021   Ag+(aq) + 2 CN- (aq) ↔ [Ag(CN)2]- (s)

Use the acidity model pH = −log[H+], where acidity (pH) is a measure of the hydrogen ion concentration [H+] (measured in moles of hydrogen per liter) of a solution.Find the pH when [H+] = 4.7 × 10−5. (Round your answer to two decimal places.)pH =