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Melanie obtains a value of 3.238 g/mL for the density of her unknown solution. The actual density of the solution is 1.048 g/mL. What is the % error of Melanie's measurement? Express your response to two digits after the decimal. a. 210.43 b. 354.93 c. 208.97 d. 204.678 - Answer 208.97 208.9695 margin of error +/- 0.05 A student obtains the following data: Mass of empty, dry graduated cylinder: 28.926 g Volume added of NaCl solution: 3.795 mL Mass of graduated cyli...

Density & Graphing - Answer Density of solution (g/mL) = mass of solution (g)/volume of solution (mL) % error = [(experimental-actual)/actual] x 100% = mass solute/(mass solute + mass solvent) x 100mass % solute (%)% State the general rule for working safely in a chemical laboratory. - Answer 1. Chemistry department approved eye protection must be worn at all times in the laboratory. Prescription eyeglasses alone do not provide sufficient protection; such eyeglasses must be cov...

what elements are usually monatomic? - Answer metals, noble gases molecular elements? - Answer made of the same non-metallic element molecular compounds? - Answer made of non-metallic elements what are molecular compounds sometimes called? - Answer covalent compounds molecular compounds have what types of bonds? - Answer covalent bonds are ionic compounds molecules? - Answer no what do ionic compounds usually contain? - Answer metallic ...

(experimental - actual)/(actual) x 100% - Answer Write out the percent error equation (% error) systematic errors - Answer errors that people make over and over and that result in poor decision making density - Answer an intensive property of matter that is calculated as mass/volume or g/mL mass solute/(mass solute + mass solvent) x 100 - Answer Write the mass percent solute equation (mass % solute) false - Answer True or false Sodium chloride soluti...

n - Answer principal quantum number positive integer indicates relative size of orbital. therefore, distance from nucleus higher n=higher energy of shell l - Answer angular momentum 0 to (n-1) determines shape determines subshells l=0 what orbital how many electrons - Answer s orbital can hold two electrons l=1 what orbital where does it first appear how many orbitals per n level how many electrons - Answer p subshell first appears in n=2 3 orbit...

Express the following numbers in scientific notation: a) 28,000,000 b) 0.0002010 c) 18.54 x 10^2 d) 0.8160 x 10^-3 - Answer a) 2.8 x 10^7 b) 2.010 x 10^-4 c) 1.854 x 10^3 d) 8.160 x 10^-2 When you multiply 10E4 x 10E5, you __________ the exponents. - Answer add When you divide 10E6 / 10E2, you ________________ the exponents. - Answer subtract When you have (10E4)^5, you _______________ the exponents. - Answer multiply How many sig figs are there: a) ...

Accuracy - Answer A description of how close a measurement is to the true value of the quantity measured. Precision - Answer a measure of how close a series of measurements are to one another sig figs for addition and subtraction - Answer the result has the same number of decimal places as the measurement with the fewest decimal places sig figs for multiplication and division - Answer the result has the same number of sig figs as the term with the least number of...

Find density given unknown concentration graphy y=mx+b - Answer y is density and x is mass % so sub value of y to find x % water= mass water lost/ mass hydrate times 100 - Answer Molarity - Answer moles/volume in L Lowest energy color - Answer red Smallest electronic transitions - Answer lowest atomic # how to take a proper measurement - - Answer record the measured value plus one estimated digit finding moles - - Answer (total grams) ...

Periodic Law - Answer When the elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties Para magnetism - Answer Unpaired electrons; attracted to a magnetic field Diamagnetism - Answer No unpaired electrons; repelled by a magnetic field Effective Nuclear Charge - Answer Zeff= Z (atomic number)-S (core electrons) Bonding Atomic Radius - Answer One-half of the distance between coval...

(1) Which of the following statements about subatomic particles is TRUE? A) Protons have about the same mass as electrons. B) Neutrons and electrons are found in the nucleus of an atom. C) Protons and neutrons have opposite, but equal in magnitude, charges. D) A neutral atom contains the same number of protons and electrons. E) Electrons make up most of the mass of an atom. - Answer D) A neutral atom contains the same number of protons and electrons. (2) Identify the descrip...

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Where were cats most likely domesticated? - Answer Egypt Where were dogs most likely domesticated? - Answer No exact location What is the progenitor species of the domestic dog? - Answer Wolf During ancient times, dog breeds were valued for their ______________. - Answer Abilities/skills What is the progenitor species of the domestic cat? - Answer African Wildcat Which theory of domestication is best applied to cats? - Answer Self-domestication ...

Progenitor species of the domestic dog? - Answer Wolf In general, during ancient times, dog breeds were valued for their - Answer abilities/skills Most widely accepted reason for the earliest domestication of dogs? - Answer Wolves were attracted to garbage around human settlements. Etc... When were dogs domesticated? - Answer >10,000 years ago What is the human-mediated theory of domestication? - Answer Humans intentionally selected increasingly tame ...

Fish class - Answer Bony What are fishes heat - Answer Ectothermic (relies fully on environment to survive) What do scales do fish - Answer Like armor, like skin and can regrow What protects a fishes gills - Answer operculum What is the lateral line - Answer How they sense the environment Pectoral fins - Answer Think of pecs on our body, balance steering. First fin on stomach Pelvic fin - Answer Think of where pelvis is, second fin on s...

The increased prevalence of genetic disorders among pure bred dogs and cats is due to what? - Answer Inbreeding What are the morphological variations seen among cat breeds attributed to? - Answer Selective breeding Dogs were originally bred for _______________ and more recently for their _______________ . - Answer Function, Form Introduction of new coat colors in the domestic dog were initially brought about by selective breeding by humans. - Answer False Dome...

_______________ is the process by which an animal develops species-specific social behavior and primary social relationships. - Answer Socialization During what period do social behaviors (e.g., play fighting) begin to develop? - Answer Transition Neonates are unable to regulate their own internal body temperature during the first few weeks of life - Answer True What is the best way to warm a chilled puppy? - Answer slowly, with one's body het It is recomme...

During slow freezing of a dairy confection product the temperature declines to about 28 F then increases slightly and remains mostly unchanged for about one hour before declining further. What is taking place in the product during the latent period when the temperature remains unchanged? - Answer ice crystal formation A fresh beef roast is packaged and place in a conventional home freezer for freezing. The freezing process for this roast would be best characterized as ____. - Answer ...

why does the food industry need grades? - Answer - grades assigned by an independent 3rd party - grades facilitate communication of value - seller and buyer far apart - lack trust between each other - official grades facilitate consumer sales *Voluntary paid by the processor *Assigned by official or supervision of gov official commonly used value description - Answer USDA - Prime , Choice , Select , Grade A commonly used value description - Answer USDA - Certif...

Puppy mills are characterized by - Answer all of these Puppies and kittens can safely be separated from their mother as early as 4 weeks of age. - Answer False How many puppy mill puppies are sold annually? - Answer 2 million You can find the following type of animal in shelters: - Answer all of these A good shelter: - Answer offer you assistance after you take your pet home Total dogs should look and perform equally well according to the UKC - Answer...