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What is STP in chemistry?

How do you use the HendersonHasselbalch to calculate the pH of a buffer solution that is .50 M in #NH_3# and . 20 M in #NH_4Cl#?

How do you find the length of the missing side given a=19 b=? c=26?

What is the pressure (atm) of 3.5 moles of helium at 50 °C in a rigid container whose volume is 25.0 L?

How do you solve #6x^2  7x + 2 = 0# using the quadratic formula?

How do you solve #4=(5z+2)/3#?

How many moles of #ZnCl# are in 100 mL of 0.300 M solution?

How do you solve #3x^2  8x + 5 = 0 # using the quadratic formula?

How do you solve for y: in # 3y = ab#?

A container with a volume of #7 L# contains a gas with a temperature of #420^o K#. If the temperature of the gas changes to #300 ^o K# without any change in pressure, what must the container's new volume be?

How many molecules of water are there in 36 grams of #H_2O#?

What is the #[OH^]# in a solution that has a #[H_3O]=1.0*10^6# #M#?

If an atom contains 12 protons and 10 neutrons, what's its mass number?

With a 0.5 M solution, many moles of NaCI would there be in 1,000 mL?

How many atoms are present in 48.60 g of Mg?

How is a Celsius temperature reading converted to a Kelvin temperature?

How do you solve #3.4/x=2.17/7.7#?

How many silver atoms are there in 4.01 g of silver?

Solid magnesium has a specific heat of 1.01 J/g°C. How much heat is given off by a 20.0 gram sample of magnesium when it cools from 70.0°C to 50.0°C?

How do you solve #2x^2  5x  3 = 0# using the quadratic formula?

How do you solve the inequality #2x  8< 7#?

What volume is needed to store 0.80 moles of helium gas at 204.6 kPa and 300 K?

What is the molar mass of #NH_3#?

What is the volume of 19.87 mol of ammonium chloride (#NH_4Cl#) at STP?

The pH of a solution is 8.7, what is the pOH?

How do you determine the molar mass of #Fe_2O_3#?

How do you solve # 12 + 3x = 30#?

A pendulum swings back and forth with a period of 0.5 s. What is the length of the pendulum arm?

If #3 L# of a gas at room temperature exerts a pressure of #15 kPa# on its container, what pressure will the gas exert if the container's volume changes to #5 L#?

What is the H+ concentration (in molarity) of a solution with a pOH of 6.7?

A textbook weighs 58.8 N on Earth. What is the mass of the textbook?

How do you solve #m  1 1/2 =  5/4#?

How do you solve #x − 6 = 11#?

How do you solve #4y+13=37#?

What is the amount of heat liberated (in kJ) from 327 g of mercury when it cools from 77.8°C to 12.0°C?

An #HCl# solution has a concentration of #3.26 * 10^2# #M#. What is the pH of this solution?

What is the total number of grams of #NaI# needed to make 1.0 liter of a 0.010 M solution?

How do you solve #n^24=77#?

A foam material has a density of #175# #g##/L#. What is its density in units of #lb##/ft^3#?

How many #"g"# of water are required to be mixed with #"11.75 g"# of #HgCl# in order to make a #"0.01 m"# solution?

A mixture of two gases has a total pressure of 6.7 atm. If one gas has a partial pressure of 4.1 atm, what is the partial pressure of the other gas?

What is the molar mass of sodium oxygen oxalate #Na_2C_2O_4#?

A solution contains 225 g of glucose, #C_6H_12O_6#, dissolved in enough water to make 0.825 L of solution. What is the molarity of the solution?

How many moles of sodium nitrate, #NaNO_3#, would be produced from the complete reaction of 253g sodium chromate, #Na_2CrO_4#?

How do you figure out how many Valence electrons is in an atom?

62% of what is 89.3?

What volume (in liters) does 2.895 moles of oxygen occupy at STP?

How do you convert 100 mm Hg to Pa?

How do you convert 16.2 ft to m?

The density of mercury metal is 13.6 g/mL. What is the mass of 3.55 mL of the metal?

How many moles is 135 L of ammonia gas at STP?

What is the power of a kitchen blender can perform 3750 joules of work in 15 seconds?

What is the molar mass of copper(l) nitrate, #Cu(NO_3)_2#?

A solution has #[H^+] = 2.0 * 10^5# #M#. How do you find the pOH of this solution?

You have 1.25 L of oxygen gas at STP. What is its mass?

Sam ran 63,756 feet in 70 minutes. What is Sam's rate in miles per hour?

What is 480 cm as m?

The mass number of a chromium atom is 52 and it has 24 protons. How many neutrons does this atom have?

Abdul runs 7 miles in 80 minutes. At the same rate, how many miles would he run in 64 minutes?

If #7/5 L# of a gas at room temperature exerts a pressure of #6 kPa# on its container, what pressure will the gas exert if the container's volume changes to #2/3 L#?

A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is it density?

What is the boiling point (in °C) of a 1.56 m aqueous solution of #CaCl_2#?

What is the reciprocal of #3#?

If #9 L# of a gas at room temperature exerts a pressure of #12 kPa# on its container, what pressure will the gas exert if the container's volume changes to #4 L#?

A certain shade of blue has a frequency of #7.32 * 10^14# #Hz#. What is the energy of exactly one photon of this light?

How do you convert #5.3 * 10^25# molecules of #CO_2# to moles?

How do you solve for x: # 3(2x)=12#?

What is the difference of #9.47.9#?

What is the density of sulfuric acid if 35.4 mL of the acid weighs 65.14 g?

How do you solve #14x=3x2#?

What is the mass, in grams, of 15 L of #O_2# at STP?

How do you solve #10x^211x6=0#?

How do you balance #PbSO_4 → PbSO_3 + O_2#?

How many grams of sodium hydroxide are needed to completely neutralize 25.0 grams of sulfuric acid?

What is the molality of a solution in which 2.3 g #O_2# gas dissolved in 355 g of water?

If #2.4*10^5# #L# of gas is at #180# #mmHg#, what is the pressure when the gas is compressed to #1.8*10^3# #L# at constant temperature?

If #12 L# of a gas at room temperature exerts a pressure of #64 kPa# on its container, what pressure will the gas exert if the container's volume changes to #24 L#?

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