Empirical gas - Study guides, Class notes & Summaries

AS level OCR Chemistry Exam Questions And Answers (Verified And Updated) Isotopes - answerDifferent atomic forms of the same element. Atoms with the same number of protons but a different number of neutrons Relative atomic mass - answerThe mean mass of an atom of an element, compared to 1/12th of the mass of an atom of carbon-12 Concentration= - answerNumber of moles ÷ Volume One mole - answer6.02×10^23 Number of moles= - answermass ÷ molar mass r.t.p - answer25 ºC 100 kPa (1 atm) ...

Mass spectrometry using lasers to ionise atoms into cations, then measure the abundance and mass using their mass-tocharge ratios Mass to charge ratio the mass of an ion divided by its charge (usually +1 in mass spectrometry) units: m/z relative atomic mass the average mass of an atom of an element relative to 1/12 of an atom of the isotope C-12 relative isotopic mass the relative mass an atom of an isotope relative to 1/12 of the mass of a C-12 atom relative molecular mass the relati...

MTTC Integrated Science Exam Question & Answers 2024. Independent Variable - correct answer The experimental factor that is manipulated; the variable whose effect is being studied. Placed on the x-axis (horizontal) on a graph. Dependent Variable - correct answer The variable that is measured in an experiment. Placed on the y-axis (vertical) on a graph. Scientific theory - correct answer Must be repeatable. Possible to be disproved and capable of change. Sampling and Sample Size - correct ...

Nafi CFEI - CFEI study guide questions and answers 100% a+ pass updated True - answer-probable cause is not needed to obtain an administrative search warrant. A.true B.false Conduction - answer-heat transfer to another body or within a body by direct contact is called: A.conduction. B.convection. C.radiation. D.pyrolysis. True - answer-fuses and circuit breakers provide protection against electrical short circuits, ground/earth faults,and load currents that might be damaging (i.e. O...

SCIN 131 WEEK 4 Exam QUIZ Questions With Answers Latest Graded. A sample of pure lithium carbonate contains 18.8% lithium by mass. What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?  A. 75.2%  B. 18.8%  C. 9.40%  D. 37.6% Feedback: Mass percent discussed in Chapter 6.2. Question 5 of 25 4.0/ 4.0 Points `I have some aliens in my basement who have developed a chemical weapon in an attempt to escape. I was able...

MTTC Integrated Science Exam Question & Answers 2024. Independent Variable - correct answer The experimental factor that is manipulated; the variable whose effect is being studied. Placed on the x-axis (horizontal) on a graph. Dependent Variable - correct answer The variable that is measured in an experiment. Placed on the y-axis (vertical) on a graph. Scientific theory - correct answer Must be repeatable. Possible to be disproved and capable of change. Sampling and Sample Size - correct ...

CHM113 Final Exam Questions With 100% Correct Answers Which of the following is NOT a compound? - answerO2, oxygen is a molecule What is the chemical symbol for the element, copper? - answerCu Which property is a chemical property - answerflammability Which of the following mixtures is heterogeneous? - answergranite Which of the following processes is/are physical changes? Select all that apply - answerwater evaporating, tearing a piece of aluminum in half Which unit is NOT an SI base un...

Isotopes ֎ -:- Atoms of the same elements with different numbers of neutrons and different masses Why do isotopes of the same element have the same chemical properties? ֎ -:- Same number of electrons, number of neutrons has no effect on reactions of an element Relative isotopic mass ֎ -:- Mass of an isotope relative to 1/12th of the mass of an atom of carbon-12 Relative atomic mass ֎ -:- The weighted mean mass of an atom of an element compared with 1/12th of the mass of an atom ...

Experiment for Diffusion? - correct answer 1) HCl placed at one end of the test tube, ammonia solution at the other. 2) Where they meet, a ring of Ammonium Chloride appears. 3) The diagram shows that the ammonia is closer to the ring, showing that ammonia must have travelled faster, showing it's a lighter gas. Experiment for Dilution? - correct answer 1) Put a coloured substance in a solvent e.g food colouring in water. 2) Over ...

CHM113 Final Exam Questions With 100% Correct Answers Which of the following is NOT a compound? - answerO2, oxygen is a molecule What is the chemical symbol for the element, copper? - answerCu Which property is a chemical property - answerflammability Which of the following mixtures is heterogeneous? - answergranite Which of the following processes is/are physical changes? Select all that apply - answerwater evaporating, tearing a piece of aluminum in half Which unit is NOT an SI base un...