What is the purpose of a database schema? A) To manage the database operations B) To define the structure and relationships of database objects C) To store user data D) To perform queries

Part E Write balanced complete ionic equation for NaOH(aq)+ HC,H,O2 (aq)→H,O(1) + NaC, H,O2 (aq). Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣΦ x" O That's not quite right. Please check your formatting and try again No credit lost. Try again. Submit Previous Answers Request Answer Part F Write balanced net ionic equation for NAOH(aq) | HC,H,O, (aq) H,O(1) i NaC, H,O, (aq). Express your answer as a chemical equation. Identify all of the phases in your answer.

What constitutes a 'reference material', and why does its utilization play a criticalrole in the chemical analysis of food products? Provide examples.

6. Suppose you have a mixture of water and your 2-bromo-2-methylbutane product in a separatory funnel. Use densities to predict which phase will be the top layer in the funnel. a. 2-bromo-2-methylbutane (organic phase) b. water (aqueous phase) c. there would only be one phase since the substances are miscible

You are creating a standard curve for a protein experiment. You have to stock solution of BS a and would like to obtain dilutions. Explain how you would create a 1:1000 dilution of your protein stock solution.

The process whereby chemical treatment is used to temporarily prevent decomposition is most completely defined as:   Disinfection Restoration Public health measures Preservation

Based on the data below, which explanation BEST explains what state of matter the compound being dissolved was? Measurement Initial Condition Final Conditions Effect Temperature 30°C 40°C Rate of dissolving decreaser Pressure 1.0 atm 2.0 atm Rate of dissolving increased The compound was a gas because the change in pressure increased the rate of dissolution. The compound was a gas because the increase in temperature caused the rate of dissolution to increase. The compound was a solid because the increase in temperature caused the rate of dissolution to increase. The compound was a solid because the change in pressure increased the rate of dissolution.

Which of the following methods is not an appropriate method for purifying a solid under normal laboratory conditions? sublimation Ochromatography distillation recrystallization

Refer to Figure 1 and answer the following questions: (i) (ii) Pictograms are symbols used in Global Harmonized System (GHS) to make hazard communication more effective. Use one key word to describe the meaning of Pictogram 1, 3, 4, 8 respectively. Provide an example of chemical compound for each. Assign relevant pictograms to the following activities. Activity 1: Heating sodium chloride with concentrated sulfuric acid Activity 2: Preparing aqueous sodium borohydride in a closed glass vessel Activity 3: Adding diethylene glycol to potassium permanganate solid 1 4 2 5 3 6 th 7 8 9 Figure 1. Pictograms under GHS system.

In order to avoid the possibility of 2-hour delays this winter, EKU will be stockpiling de-icing salts to help keep the roads and sidewalks clear. Facility Services has been quoted the following prices:  K2SO4: $5.35/kg MgSO4: $4.55/kg Which salt provides a better value? Support your answer with a calculation.