Molecular cloud - Study guides, Class notes & Summaries

ACS Chemistry Final Exam 182 Questions with Verified Answers Layout of an element (mass # & atomic #) - CORRECT ANSWER atomic number = - CORRECT ANSWER # of protons mass number = - CORRECT ANSWER # of protons + neutrons the number of protons in a neutral atom will equal the - CORRECT ANSWER # of electrons how to find the correct number of neutrons - CORRECT ANSWER mass number - atomic number Forms of the same elements that differ in amount of neutrons - CORRECT ANSWER isotopes...

___________makes up 21% of earth's atmosphere (by volume) and is the second most abundant gas in the air we breathe. - ️️oxygen ___________makes up 78% of earth's atmosphere (by volume) and is therefore the most abundant gas in the air we breathe. - ️️Nitrogen A cumulonimbus cloud is most likely to form in a(n) ___________ atmosphere. - ️️unstable A weather _________ (watch or warning) means that a significant weather hazard is imminent or is already occurring, and there exists ...

change of state from solid -> liquid -> gas ________ energy - requires energy needed to phase change from solid --> liquid --> gas comes from: - the surroundings when phases change from solid --> liquid --> gas, interactions are _______ between molecules - overcome change of state from gas --> liquid --> solid ______ energy - releases what happens to the energy from a phase change from gas --> liquid --> solid? -released to surroundings when phases change fro...

What were the early ideas of how the Sun shines? Why were these ideas incorrect? Why does the Sun shine? - Answer-Chemical burning was what humans thought made the sun shine. However, if this was true- the sun would be like a campfire that would need a fuel source and to be "fed" periodically. The Sun shines due to nuclear fusion Be able to name the Sun's layers from inside to outside and be able to know the importance of each layer (e.g. what type of light does the chromosphere emit?) -...

Luminosity - The total amount of power a star emits into space that's measured in watts. Apparent Brightness - Amount of starlight that actually reaches Earth HR Diagram - is a graphical tool that astronomers use to classify stars according to their luminosity, spectral type, color, temperature and evolutionary stage. Stars in the stable phase of hydrogen burning lie along the Main Sequence according to their mass. OBAFGKM - Oh Be A Fine Girl Kiss Me Main Sequence - the vast majorit...

the age of the Earth is: a. 4.56 million years b. 3.5 billion years c. 4.56 billion years d. 14 billion years correct answers c. 4.56 billion years your semester at sea take an unexpected turn when the ship's captain decides to teach you a lesson by throwing all the navigation equipment overboard. Thankfully, your mom purchased you a nice chronometer wristwatch when you graduated high school in Greenwich, England. Always wanting to know when it's a good time to call mum, one of your ma...

Intermolecular forces - ANSWER- non bonding forces - found BETWEEN molecules - influence the energy physical properties of the substances Physical properties examples - ANSWERboiling point, melting point, solubility, color, odor, etc. T/F: stronger intermolecular forces correlate to a higher boiling point - ANSWERTrue Kinetic energy - ANSWER- provides the energy needed to overcome intermolecular forces What is kinetic energy associated with? - ANSWERThe random motion of particles...

Which reaction requires the most energy? A. N(g) → N+(g) + e - B. N+(g) → N2+(g) + e - C. F(g) → F+(g) + e - D. F+(g) → F2+(g) + e - - Answer-D. F+(g) → F2+(g) + e - Fluorine has a higher effective nuclear charge than Nitrogen - so it is harder to remove an electron (takes more energy because the electron is more strongly attracted by the nucleus). Effective nuclear charge is the same for F and F+ because the number of protons and core electrons are not changed. However, when t...

Chem 210 Exam 1 Questions & Answers(Graded A+) Intermolecular forces - ANSWER- non bonding forces - found BETWEEN molecules - influence the energy physical properties of the substances Physical properties examples - ANSWERboiling point, melting point, solubility, color, odor, etc. T/F: stronger intermolecular forces correlate to a higher boiling point - ANSWERTrue Kinetic energy - ANSWER- provides the energy needed to overcome intermolecular forces What is kinetic energy ass...

AQA 2023 AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry questions and answers verified What is the equation linking mass moles and MR? Mass=moles * MR What is the definition of Ar (relative atomic mass)? The average mass of an atom of an element compared to the mass of one twelfth of carbon 12. What does Mr stand for? Relative molecular mass Define relative isotopic mass. The mass of an isotope of an element compared to the mass of one twelfth of the mass of carbon 12 ...