chemistry

Chemical Equation P4O10 + 6H200-> 4H3PO4 can be correctly interpreted as

1 mole P4O10 + 6 moles of H20 react to form 4 moles of H3PO4

what is the mass of ammonia has produced by the reaction of 2.0L of nitrogen gas according to the chemical equation below?

1962 g NH3

In the reaction 2H2 (g) + O2 (g) -> 2H2O (g) assuming conditions of pressure and temperature remain the same, what is the volume ratio of H2 to H2O?

1:1

If deltasfus = 30 J/mol-K and deltaHfus = 6000 J/mol for a certain substance,its melting point is

200k

the air in a person's lungs consists of 0.177mol of gas at 310K and 101.3kpa pressure. What is the volume of the air?

4.5 L

How many grams of oxygen will be produced by the reaction of 10 moles of O3 in the reaction 2O3 -> 3O2?

480 g

In the chemical reaction described by the equation 4Fe + 3O2 -> 2Fe2O3 the mole ratio of iron to iron (III) oxide is

4:2

which of the fooling is correct, balanced form of the equation Fe+ O2 -> Fe2O3?

4Fe + 3O2 => 2Fe2O3

At a winter carnival, a balloon is filled with 500L of helium at a temperature of 273K. What will be the volume of the balloon when it is brought into a warm house 295K?

5.4L

InIn the equation PCl3= 3H2O -> H3PO3 + 3HCl if you have 2 moles of PCl3 what is the theoretical yield of HCl?

6 moles HCl

a scientist warms 26mL of gas at 273K units its volume is 32mL, what is the new temp in celcius?

63 celcius

How many grams of BrCl form when 239.7 g Cl2 react with excess Br2? Br2 = Cl2 -> 2BrCl

780 g

How many grams of Co2 is produced from the combustion of 2.0 mole of methane CH4 + 2O2 -> 2H2o + CO2

88 g CO2

which of the following forms the strongest hydrogen bond? HF HBR H2S HCl

HF

amount of reactant that will run out first

Limiting reactant

the type of forces between Nonpolar molecular is a

London dispersion force

Which of the following equations does not satisfy the law of conservation of mass?

MgCO3 -> Mg + C +3O2

The equation, SrBr2 + (NH4)2Co3 -> SrVO3+ NH4Br will be balanced if the coefficient of which term is changed to 2?

NH4Br

which of the following is most likely to have a high boiling point? H2O CH4 CO2 NaCl

NaCl

The amount produced from conducting an experiment

actual yield

The measured amount of product obtained from a chemical reaction is the

actual yield

According to the law of conservation of mass, the total mass of the reacting substances is...

always equal to the total mass of the products.

(aq)

aqueous solution

the attraction of particles for each other within a liquid is

cohesion

capillary action s the result of

cohesion and adhesion

what kind of reaction is C2H2 + O2 -> CO2+H2O

combustion

according to avogadro's law, 1L of H2(g) and 1L of O2(g) at the same temperature and pressure

contain equal numbers of molecules

In the word equation: iron + copper (II) sulfate -> iron (II) sulfate + copper, which of the following products?

copper & iron (II) sulfate

Hydrogen bonding is a special type of

dipole-dipole force

Gay-Lussac

direct relationship between temp and pressure

The main reason that water contains especially strong hydrogen bonds is that

hydrogen and oxygen differ greatly in electronegativity.

(l)

liquid

If the particles of a sample of matter are attracted o each other but can move past eachother, they are most likely in a state of

liquid

Molar Mass van be used to relate

mass of reactant to moles of reactant, mass of product to moles of product, moles of product to mass of product.

Which of the following is NOT evidence of a chemical reaction

melting

the efficiency of obtaining the amount of product you intent to obtain

percentage yield

Boyle

pressure and volume are inversely proportional

Charles law

shows the proportional relationship between volume and tempt

what kind of chemical reaction results from the interaction between Ca2Si and Cl2?

single displacement

(s)

solid

a sample of matter whose particle are close together but cannot move past each other is

solid

pascal

standard unit of pressure

kelvin

standard unit of temp

triangle

substances are heated

Which of the following is not an explanation of why water rises through the tissues in the stem of a plant: capillary action, cohesion, surface tension, adhesion

surface tension

water forms drops because of

surface tension

Which of the following statements is true for a balanced chemical reaction?

the number of atoms of an element that make up the reactants is equal to the number of atoms of that element that makes up the products.

deltaHvap > deltaHfus

true

avogadro's

two gases in the same conditions will have the same number of particles if they have the same volume

In the reaction: water + energy-> hydrogen gas + oxygen gas, energy is absorbed. True or False?

True

How many moles of air are in 1Lat -23 degrees celsius and 101kPa, R=8.314 LkPa/molK?

0.049mol

calculate the amount of moles of oxygen formed if 1.34 mol H2O2 completely decompose? 2H2O2 -> 2H2O + O2

0.67 mol

during a stay in the mountains, a motorist drank bottled water from a 1L plastic container and capped the the empty bottle. At the end of a drive to the coast (sea level), the bottle was crumpled to a volume of 0.75L. if the air pressure at sea level is 1.15 atm, what was the pressure in the mountains?

0.863 atm

If you have 1.429 mL of H2 gas, the first conversion factor you should use first in the stoichiometric calculation for finding the moles of H2O is?

Density

reactant that is capable of making more product

Excess Reactant

amount you should be able to make considering the quantities of reactant you have

Theoretical yield

the total energy content of a system is its

enthalpy

a gas does not have a set volume because its particles are

essentially independent

The reaction Zn and H4SO4 is not likely to occur. True or False?

false

The theoretical yield is the larger yeild. produced by the reactant that we have the most of

false

(g)

gas

in general ionic compounds have

high boiling points and high melting points

which of the following does NOT describe gasses

high density