Posted in Chemistry

Please login to view the answer

Login
Join us

Related Questions

Posted in Chemistry

________ energy is being changed into _____ __ energy?

Please login to view the answer

Login
Join us

Posted in Chemistry

Which would conduct electricity well in solution: a strong electrolyte, a weak electrolyte, both types of electrolytes, or neither type of electrolyte?

Please login to view the answer

Login
Join us

Posted in Chemistry

Describe how surface area affects the rate of a reaction.

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

Which substance is the reducing agent in this reaction? 2KMnO4+3Na2SO3+H2O→2MnO2+3Na2SO4+2KOH

Please login to view the answer

Login
Join us

Posted in Chemistry

Determine how many moles of Ba(OH)2 are required to completely neutralize 0.432 mole of HC2H3O2.

Please login to view the answer

Login
Join us

Posted in Chemistry

1.15 g of a metallic element reacts with 300 cm3 of oxygen at 298 K and 1 atm pressure, to form an oxide which contains O2– ions. What could be the identity of the metal? A calcium B magnesium C potassium D sodium

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

Indicate whether the following are acidic, basic, or neutral solution A. [H2O+]=6.0×10^-12 B. [H3O+]=1.4×10^-9 C. [OH-]=5.0×10^-12 D. {OH-]=3.5×10^-10

Please login to view the answer

Login
Join us

Posted in Chemistry

Which statement best explains why a carbon atom can bond easily with other atoms? It is an ion. It is an organic element. It has four valence electrons. It forms hydrogen bonds.

Please login to view the answer

Login
Join us

Posted in Chemistry

Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride: S(g) + 3F2(g) ->SF6(g) If 50 g S is allowed to react as completely as possible with 105.0g F2(g), what mass of the excess reactant is left.

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

In the following reaction, how many grams of oxygen will react with 10.47 grams of benzene (C6H6)? 2C6H6 + 15O2 12CO2 + 6H2O The molar mass of benzene is 78.1074 grams and that of O2 is 32 grams.

Please login to view the answer

Login
Join us

Posted in Chemistry

Which of the following statements is true about catalysts? and Why? a. Catalysts slow down the rate of chemical reactions b. All catalysts are enzymes c. Catalysts are used up during a chemical reaction d. Catalysts lower the activation energy of a chemical reaction

Please login to view the answer

Login
Join us

Posted in Chemistry

You carefully weigh out 14.00 g of CaCO3 powder and add it to 56.70 g of HCl solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 64.96 g . The relevant equation is CaCO3(s)+2HCl(aq)→H2O(l)+CO2(g)+CaCl2(aq) Assuming no other reactions take place, what mass of CO2 was produced in this reaction?

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

Which of the following are most likely to form a metallic bond? several gold atoms copper and chlorine magnesium and chlorine several chlorine atoms

Please login to view the answer

Login
Join us

Posted in Chemistry

Which compound contains only nonpolar covalent bonds? O2 CO2 H2O NO3

Please login to view the answer

Login
Join us

Posted in Chemistry

Which shows the correct relationship? A.) Eo cell > 0 = nonspontaneous reaction B.) Eo cell > 0 = spontaneous reaction C.) Eo cell = 0 = nonspontaneous reaction D.) Eo cell

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

Monel metal is a corrosion-resistant copper-nickel alloy used in the electronics industry. A particular alloy with a density of 8.80 g/cm3 and containing 0.073% Si by mass is used to make a rectangular plate that is 15.0 cm long, 12.5 cm wide, and 2.50mm thick and has a 2.50-cm-diameter hole drilled through its center such that the height of the hole is 2.50mm . The silicon in the plate is a mixture of naturally occurring isotopes. One of the those isotopes is silicon-30, which has an atomic mass of 29.97376 amu and a percent natural abundance of 3.10% How many silicon-30 atoms are found in this plate? Express your answer numerically using two significant figures.

Please login to view the answer

Login
Join us

Posted in Chemistry

Which of the following statements about ionization energy is true? A. In a period, elements farther to the right generally have lower ionization energies than elements on the left. B. Elements toward the bottom of a group periodic table generally have higher ionization energies than elements at the top of the group. C. Ionization energy is the amount of energy used to add an electron to an atom. D. Potassium has a lower ionization energy than sodium.

Please login to view the answer

Login
Join us

Posted in Chemistry

Draw a complete Lewis structure for the conjugate acid of nitromethane that shows all bonds, unshared electron pairs, and minimized formal charges, where appropriate.

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

An unknown compound contains only carbon, hydrogen, and oxygen (CxHyOz). Combustion of 2.50g of this compound produced 3.67g of carbon dioxide and 1.50g of water. How many moles of carbon, C, were in the original sample?

Please login to view the answer

Login
Join us

Posted in Chemistry

What kind of bond does these have? 1.tap water 2.distilled water 3.sugar 4.salt 5.salt in distilled water 6.sugar in distilled water

Please login to view the answer

Login
Join us

Posted in Chemistry

A teacher makes the following statement. “Gasoline boils at a relatively low temperature (about 150°C). The kerosene is removed at around 200°C, followed by diesel oil at 300°C and fuel oil at around 370°C.” What topic is the teacher most likely talking about? a. distillation of a mixture b. filtration of a pure substance c.evaporation of a mixture d. sorting of a pure substance

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

Which of the following ions would represent the ion of an element from Group 2A? A. X2- B. Y3+ C. Z+ D. A2+

Please login to view the answer

Login
Join us

Posted in Chemistry

Which contributes to the dissolution of sugar in water? a. the dissociation of an ionic compound in water b. a strong pull of water molecules on an ionic compound c. the dissociation of a polar covalent compound in water d. a strong pull of water molecules on a polar covalent compound

Please login to view the answer

Login
Join us

Posted in Chemistry

What is the mass of 5.05×1021 platinum atoms?

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

Which of the following statements about the use of nuclear energy is true? a. Nuclear energy cannot be used safely. b. Nuclear fusion has no known useful applications. c. Nuclear fission is currently more useful for producing energy than nuclear fusion. d. Nuclear fusion has fewer safety risks than nuclear fission.

Please login to view the answer

Login
Join us

Posted in Chemistry

Which statement best characterizes chemical reactions? They always occur very quickly. Their rates vary significantly. Their rates are always slow. They rarely occur in the natural environment.

Please login to view the answer

Login
Join us

Posted in Chemistry

Identify the group of elements that corresponds to the following generalized electron configuration: [noble gas]ns 2 (n−1)d 2

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Chemistry

An unknown or changeable quantity is called a(n)…

Please login to view the answer

Login
Join us

Posted in Chemistry

Which of these is a property of a substance that is composed of atoms that are held together by ionic bonds? It can be shaped into wires. It has a low melting point. It conducts electricity when in solid form. It conducts electricity when it is dissolved in water.

Please login to view the answer

Login
Join us

Posted in Chemistry

Which fat is most likely a solid at room temperature? one that is saturated one that is unsaturated one with double bonds one that contains no hydrogen

Please login to view the answer

Login
Join us

Online Tutors To Help You