Draw the Lewis dot structure for Mg2+. Show the charge. To change the symbol of an atom, double-click on the atom and enter the letter of the new atom.

Solution

Homework

6 months ago

View Answer

Question:

# Question: Laboratory Assignment Laboratory Techniques Desk No.- Date, lab Sec. Identify the Technique Icon, at left, for each of the Technique Icon... | Laboratory Assignment Laboratory Techniques | | | | --- | --- | --- | | Date | Lab Sec. | Name | | Identify the Technique Icon, at left, for each of the following techniques. | | | | Technique Icon | Description of technique | | | 1. | To dispense chemicals, read the label at least twice before removing any chemical from the reagent bottle. | | | 2. | Water or glycerol should be applied to the glass tubing and the hole in the rubber stopper before inserting the glass tubing. | | | 3. | A centrifuge should be balanced with an even number of centrifuges/test tubes, placed across the outer hole one another, with equal volumes of liquid. | | | 4. | The volume of a liquid or solution in calibrated volumetric glassware should be read using all-certain digits (from the labeled calibration marks on the glassware) plus one uncertain digit (the last digit that is the best estimate between the calibration marks)—that is, to the correct number of significant digits. | | | 5. | The bowl of the funnel for gravity filtration should be always less than two-thirds full. | | | 6. | To dispense a liquid from a paper, first draw the liquid into the pipet 2-3 cm above the calibration mark with a pipet bath and then use the index finger to control its flow. | | | 7. | The suction created for the vacuum filtration of a precipitate is applied with an aspirator in which the water faucet is fully open. | | | 8. | To prepare a solution, always add the solid reagent or more concentrated solution to a volumetric flask that is already approximately one-third full with solvent. | | | 9. | While dispensing titrant from a burst, the stopcock should be operated with the left hand (if right-handed) and the Erlenmeyer flask should be swirled with the right hand. | | | 10. | To heat a solid to high temperature in the absence of air, place the solid in a crucible and fully cover the crucible with the crucible lid. | | | 11. | Information on the properties and disposal of chemicals can be found in the stockroom or online from the MSDS collection. | | | 12. | A burst should be raised with several 3- to 5-mL portions of titrant before being filled. | | | 13. | Glassware is clean when no water droplets cling to the inner wall of the vessel. | | | 14. | For heating a liquid in a test tube, the test tube should be less than one-third full, moved continuously in and out of the "cool" flame at a 45° angle, mostly near the top of the liquid. | | | 15. | The volume of a liquid should be read at the bottom of the meniscus. | | | 16. | Small quantities of liquids in test tubes are best be heated (safely) in a hot water bath with the heat source being either a hot plate or a direct flame. | | | 17. | All chemicals must be properly disposed—either according to the Experimental Procedure or the laboratory institution. | | | 18. | Never place reagents directly onto the weighing pan of a balance—always use weighing paper, a beaker, or some other container. | | | 19. | A hot plate (not an open flame) is the heat source for heating or evaporating flammable liquids. | | Laboratory Techniques 4.1

The diameter of a circle measures 24 mm. What is the circumference of the circle? Use 3.14 for π, and do not round your answer.

Your arm's phalanges are (blank) to your humerus. Please explain. A. Proximal B. Distal C. Superficial D. Superior

How much is 350 mL in ounces?

The radius is on the thumb side, and the ulna is on the pinky side.

Determine whether the following equation represents a linear or non-linear function. Provide steps if possible. 2x+3y=9xy

Draw the major product of this reaction. Ignore inorganic byproducts. Assume that the water side product is continuously removed to drive the reaction toward products. Draw the product of the reaction shown below. Use wedge and dash bonds to indicate stereochemistry where appropriate. Ignore inorganic byproducts.

Express $0.02 \overline{2}$ as a fraction.

Is 1 dL the same as 100 mL?

Which best describes traits controlled by multiple alleles? A. Traits expressed by two genes B. Traits influenced by genes along with environmental factors C. Traits controlled by three or more different forms of a gene D. Traits inherited from both parents

Question: Question 11/12 A company started the year with $\$ 10,000$ of Inventory. Purchases for resale during the year were $\$ 20,000$. Inventory on... Question 11/12 A company started the year with $\$ 10,000$ of inventory. Purchases for resale during the year were $\$ 20,000$. Inventory on December 31 is $\$ 5,000$. What's the cost of goods sold? $\$ 5,000$ $\$ 10,000$ $\$ 25,000$ $\$ 30,000$ $\$ 35,000$ Question 12/12 A company sells 10,000 shares of previously authorized stock at the par value of $\$ 10$ per share. What's the correct entry to record the transaction? Debit cash $\$ 10,000$, credit capital stock $\$ 10,000$ Debit capital stock $\$ 100,000$, credit cash $\$ 100,000$ Debit cash $\$ 100,000$, credit capita 11 stock $\$ 100,000$ Debit cash $\$ 100,000$, credit treasury stock $\$ 100,000$ Debit cash $\$ 10$, credit capital stock $\$ 10$

# Q5.1. Which of the following is FALSE? - If a genetic disease reduces fertility and the allele that causes the disease offers no other advantage, the allele will likely eventually disappear, due to natural selection. - Natural selection does not favor individuals who are homozygous for the sickle-cell allele, because these individuals typically die before they are old enough to reproduce. - Individuals who are heterozygous $\boldsymbol{H b A} / \boldsymbol{H b S}$ are protected from malaria, and this is why sickle-cell disease persists in wetter, mosquito-prone regions in Africa. - In regions where malaria does not occur, individuals who are heterozygous $\boldsymbol{H b A} / \boldsymbol{H b S}$ have a fitness advantage over those who are homozygous for the normal hemoglobin allele (HbA). ## Q5.2. AFTER malaria is cured, the frequency of the $\boldsymbol{H b S}$ allele should decrease in regions with lots of mosquitoes because: - People will no longer die from sickle-cell disease in these regions. - Having one copy of the $\boldsymbol{H b S}$ allele will no longer be advantageous in these regions. - Natural selection will no longer act on the $\boldsymbol{H b S}$ allele at all in these regions. - All alleles associated with genetic diseases eventually disappear.

# To convert 180 seconds to minutes, which proportion should you use? | Percent | | | --- | --- | | 60 seconds | | | 180 seconds | | | 1 minute | | | 60 seconds | | | x | | | 1 minute | | | 60 seconds | | | 1 minute | | | x | | | 60 seconds | | | 1 minute | |

How much is 1000 ml in oz?

How many tablespoons is 30 mL?

How much is 30 mL in ounces?

What is the height in meters of a person who is 5'4"?

How many cups are equivalent to 100 grams?

Calculate the present value of a $\$ 10,000$ perpetuity at a 6 percent discount rate. Calculate the future value of an annuity of $\$ 5,000$ each year for eight years, deposited at 6 percent.

Convert 49° Celsius to degrees Fahrenheit using the following formula: F = {C+32 O A. 506.5°F OB. 196.2°F C. 94.6°F OD. 2237°F O E. 120.2°F

What is the conversion of 63°F to °C?

| Fill in the table for the ion of copper: | | | | | | | --- | --- | --- | --- | --- | --- | | Symbol | Ion Charge | Number of Electrons in Ion | Number of Protons in Ion | | | | Cu | | | | | |

Is density an intensive or extensive physical property? A. Density is considered an intensive property of matter because it does not depend on the amount of matter. As the mass of a substance increases, the volume will also increase proportionally. B. Density is considered an extensive property of matter because the mass and volume change for a given sample of the same substance. C. Density is considered an extensive property of matter because it does not depend on the amount of matter. As the mass of a substance increases, the volume will also increase proportionally. D. Density is considered an intensive property of matter because the mass and volume change for a given sample of the same substance.

# Unit 35 Quiz: Puerto Rico: Places to see ## Instructions Refer to the previous activity to answer the following question. Puerto Rico is about the size of what U.S. state? California Conneticut New York

The patient has a temperature of 38.6°C. Convert to Fahrenheit: 38.6°C = _______°F