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a pencil is 7.5 inches long. If there are 2.54 cm in one inch, how long is this pencil in...
what is the mass of a solution that has a density of 0.775 g/ml and a volume of 50.0 mL?
balance the following equation ___N2 + __H3----)___NH3
What will be the molarity of a solution if 3.50g of sodium hydroxide, NaOH are dissolved in water to make...
what are three components of public opinion and what do they describe?
is the stability of a nucleus determined by the ratio of electrons to protons?
Explain what is happening at the nanoscale during energy generation?
MgNH4PO4.6H2O loses H2O stepwise as it is heated. between 40C and 60C the monohydrate (MgNH4PO4.H2O) is formed and above 100C...
an object with a mass of 7.5 g raises the level of water in a graduated cylinder from 25.1 mL...
which of the following best represents a single replacement reaction? 2Fe(s)+3H2SO4(aq)-->Fe(SO4)3(aq)+3H2(g) Ba(OH)2(aq)+2HNO3(aq)-->Ba(NO3)2(aq)+2H2O(I) 3MnO2(s)-->Mn3O4(s)+O2(g) 2Al(s)+3cl2(g)-->2AlCl3(s)
A certain amount of chlorine gas was placed inside a cylinder with a movable piston at one end. The initial...
the atoms inside of a _________ are not allowed to move around too much.
How is conductivity of a substance related to the number of ions in that substance?
what do the superscript and the subscript in the notation 40/19K represent?
7. Which of the following is not found in the following substance? ...
An unknown compound contains only C, H, and O. Combustion of 5.10 g of this compound produced 12.0 g of...
We are located about 28,000 light-years from the galactic center and we orbit the center once every 230 milliion years....
What is the difference between a base unit and a derived unit?
What volume of alcohol (d = 0.800 g/mL) is needed to obtain 320. g of alcohol
1.Calculate the mass and volume of oxygen released when 29.4g potassium chlorate (KCLO(small3)) decomposes to form potassium chloride and oxygen 2.consider...
how many grams of NO2 are theoretically produced if we start with 3.7 moles of S and 4.9 moles of...
What are three ways pure substances behave when interacting with other pure substances?
for each of the following sets of elements, label each as either noble gases, halogens, alkali metals, alkaline earth metals,...
true or false: the volumes of one mole of diffrent solid and liquid substances are the same
The mass in grams of 6.0 mol of hydrogen gas (contains H2)
if 22 ml of water containing 0.03 mol of HCl is mixed with 38 ml of water containing 0.03 mol...
what is the temperature of a gas if 5.0 moles of the gad occupy a 10 liter container at a...
what mass in grams of calcium nitrate , is present in 400.0 mL of a 0.150 M solution?
When a 6.00-g sample of RbBr is dissolved in water in a calorimeter that has a total heat capacity of...
How can the physical properties of metals be modified?
Vinegar is typically 4.95% acetic acid by volume. How much vinegar in mL must be present in order to have 0.0753 liters of acetic acid?
How many moles are in a sample having 9.1541 multiplied by 1017 particles
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