A sample of helium - Study guides, Class notes & Summaries

Question 1 Correct 5.00 points out of 5.00 Talc is a mineral with low conductivity for heat and electricity which is not attacked by acid. It is used in talcum powder and face powder. Suppose a sample of talc weighs 13.65 g with a density of 1.75 g/cm3 in mineral oil. If this same sample of talc in air weighs 35.97 g, assuming no volume change, what is the density of the talc sample in air? Select one: A. 2.44 g/cm3 B. 2.82 g/cm3 C. 1.61 g/cm3 D. 4.61 g/cm3 E. 2.63 g/cm3 Question 2...

Exam 4 Chemistry 113 Exam Exam With 100% Correct Answers 2024 Boyle's Law: what quantity relating pressure P and volume V is constant? - answerP X V A 12-liter tank contains helium gas pressurized to 160 What size tank would be needed to contain this same amount of helium at atmospheric pressure (1 atm)? - answerP1V1=P2V2 P1 = 160 V1= 12 P2= 1 V= ? 160(12)=(1)(?) =1920 How many 3-liter balloons could the 12-L helium tank pressurized to 160 Atm fill? Keep in mind that an "exhauste...

TMC Practice Exam A + B Missed Questions A 52 year-old post-operative cholecystectomy patient's breath sounds become more coarse upon completion of postural drainage with percussion. The respiratory therapist should recommend: A. Continuing the therapy until breath sounds improve. B. administering dornase alpha. C. administering albuterol therapy. D. deep breathing and coughing to clear secretions. - D. deep breathing and coughing to clear secretions. See Patient Assessment ...

A positively charged subatomic particle found in the atomic nucleus. - Answer-Proton An electrically neutral subatomic particle found in the atomic nucleus. - Answer-Neutron Any subatomic particle found in an atomic nucleus. Another name for either proton or neutron. - Answer-Nucleon The attractive force between all nucleons, effective only at very short distances. - Answer-Strong Nuclear Force The number of protons in the atomic nucleus of each atom of a given element. - Answer-Atomic Nu...

CUMULATIVE EXAM CHEMISTRY FINAL EXAM NEWEST ACTUAL EXAM COMPLETE 140 QUESTIONS AND CORREC DETAILED ANSWERS (VERIFIED ANSWERS)| ALREADY GRADED A+ A kitten's normal body temperature is 102ºF. Express this temperature in Cº. - ANSWER-38.9ºC Which of the following is a chemical change? - ANSWER-Frying an egg A radioisotope has a half-life of 4 days. How much of a 20-gram sample of this radioisotope remains at the end of 16 day time period. - ANSWER-1.25 gram The formula for ammoniu...

The name of the State Agency responsible for enforcing pollution control laws in Texas is – a. Texas Water Development Board b. Texas Water Commission c. Texas Section of EPA d. Texas Commission on Environmental Quality e. Texas Water Resource and Conservation Commission 2. The term pathogenic means – a. Aerobic Bacteria b. Anaerobic Bacteria c. Fecal Matter d. Coliform Bacteria e. Capable of Causing Disease 3. The minimum separation between sewer lines and potable water lin...

If 2,000 atoms of 206Pb are found in a mineral sample, the how many helium atoms were produced?16,000 Mount Fuji and Mount St. Helens in the western United States are examples of__________Stratovolcanoes The color of a mineral's powder is known as_______streak Which of the following pairs does NOT go together?Phyllite, High-grade metamorphism Pumice and scoria are easily identifiable because of their_________ texturesVesicular The first minerals to crystallize as a magma cools tend t...

Exam 4 Chemistry 113 Exam Exam With 100% Correct Answers 2024 Boyle's Law: what quantity relating pressure P and volume V is constant? - answerP X V A 12-liter tank contains helium gas pressurized to 160 What size tank would be needed to contain this same amount of helium at atmospheric pressure (1 atm)? - answerP1V1=P2V2 P1 = 160 V1= 12 P2= 1 V= ? 160(12)=(1)(?) =1920 How many 3-liter balloons could the 12-L helium tank pressurized to 160 Atm fill? Keep in mind that an "exhauste...

1. Question: Dry ice (carbon dioxide) changes from a solid to a gas at –78.5°C. What is this temperature in °F? 2. Question: The state of matter for an object that has both definite volume and definite shape is 3. Question: In 1828, the diameter of the U.S. dime was changed to approximately 18 mm. What is this diameter when expressed in nanometers? 4. Question: A piece of antimony with a mass of 17.41 g is submerged in 46.3 cm3 of water in a graduated cylinder. The water level increases t...

CHEM 209 Quiz 3 Latest Update with Verified Solutions Provide a diagram illustrating the key components of a GC instrument. Answer: Reservoir for Mobile Phase (pressurized helium cylinder) -> Oven -> Sample Injector (micro-syringe) -> Stationary Phase (column) -> Detector (thermal conductor or flame ionization detector) -> Readout (computer) What variables are typically plotted on the x- and y- axes of (a) a chromatogram and (b) a calibration curve? a. x: time, y...