How many protons are in an atom of carbon with 7 neutrons? a) 6 b) 7 c) 12.01 d) 13 e) None of the above

QUESTION Q Which of the following is true concerning mass number? ANSWER Using mass number notation, we can identify the number of protons. electrons.and neutrons. Isotopes differ in their numbers of electrons. The mass number is equal to the number of protons. Thus, the mass number of Helium is 2. The mass of electrons contributes significantly to mass number. IDONT KNOWYET

Problem 19. (1 point) Elements of alkali metal typically are highly reactive bond with two atoms of oxygen form cations with a charge of +2 are monatomic gases

Question 6 (10 points) Calculate the final temperature when 23.4 grams of water at 75 degrees C is mixed with 2.45 grams of iron at 2.6 degrees C. The specific heat of water is 4.184J/gC and the specific heat of iron is 0.45J/gC Show your work

All the elements present in the same group of the periodic table have the same __ number of valence electrons number of energy levels number of electrons number of neutrons

Which of these equations correctly expresses the self-ionization of water? H_(2)O+H_(3)O^+rightarrow H_(2)O+OH^- H_(2)O+H_(2)Orightarrow 2OH^- H_(2)O+H_(2)Orightarrow 2H_(3)O^- H_(2)O+H_(2)Orightarrow H_(3)O^++OH^-

Which molecule contains a total of three carbon atoms? A 2-methylpropane B 2-methylbutane C propane D butane

A dihydroxy alcohol that is made from ethane is A ethanol B glycerol C ethylene glycol D ethane

Compounds which have the same molecular formula but different molecular structures are called A isomers B isotopes C allotropes D homologs.

2Fe_(2)O_(3)(s)+3C(s)arrow 4Fe(s)+3CO_(2)(g) Calculate the mass of iron produced from the complete reaction of 64.0 grams of iron (III)oxide. 89.5 g Fe 22.48 Fe 11.2 g Fe 44.88 Fe 107 g Fe

Hot Questions

When you balance the Separate Water simulation how many individual oxygen atoms do you need on the products side to complete the balanced equation? 1 2 3 4

Determine which type of property each statement describes by typing "physical or "chemical" in the blank. Hydrogen is a colorless tasteless, and odorless gas. $\square $ Hydrogen is very combustible in the presence of oxygen. $\square $ Hydrogen is very reactive with most elements. $\square $ Hydrogen is the least dense of all elements. $\square $

Which of the following is an empirical formula? $C_{3}H_{6}$ $C_{3}H_{8}$ CH $C_{2}H_{4}$

Which of the following has the most mass per mole? Oxygen Nitrogen Carbon Potassium

What is the electron configuration for oxygen, O? $1s^{2}2s^{2}2p^{3}$ $1s^{2}2s^{2}2p^{6}3s^{2}$ $1s^{2}2s^{2}2p^{4}$ $1s^{2}2s^{2}2p^{6}3s^{2}$

Gasoline, paints, thinners solvents, natural gas acetylene are all examples of potential: A. Toxic hazards. B. Flammable hazards. C. Combustible hazards. D. All of the above. E. None of the above.

Trans fats and partially hydrogenated oils are the same thing. False True

Is this compound ionic or covalent? $NO_{2}$ ionic covalent

(b) $H_{3}C-CH-CH_{2}-CH_{2}-CH_{3}\\ H_{2}C-CH_{3}$ 2-Ethylpentane Spell out the full name of the compound. The correct name is $\square $

Question 2 (Multiple Choice Worln 2 Points) (05.01 LC) Which of the following groups have seven valence electrons and are very reactive? Column 1 alkali metals Column 2 alkaline earth metals Column 17 halogens Column 18 noble gases