Answers edited by Jarni Renz
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Question #54da7

Question #1bdae

A wood fire burns at 260 °C. What is the temperature in Fahrenheit?

Question #1830f

Question #1aa06

Question #8994e

1.91 g H2 is allowed to react with 9.86 g N2, producing 1.74 g NH3.
What is the theoretical yield in grams for this reaction under the given conditions?
Express your answer to three significant figures and include the appropriate units.

How do you balance #NH_3(g) + O_2(g) > N_2(g) + H_2O(g)#?

What mass of #"potassium chlorate"# is necessary to generate a #5.5*g# mass of oxygen gas?

Use the tabulated density of water at 17 degrees celsius to calculate the theoretical mass of water (in grams) that should be delivered by a #"10.00 mL"# pipet? Density of water at #17^@ "C"# #=# #"0.998778 g/mL"#

Question #c65e7

Question #a0976

In the reaction #2NaOH+H_2SO_4 > 2H_2O+Na_2SO_4#, how many grams of sodium sulfate will be formed if you start with 200.0 grams of sodium hydroxide and you have an excess of sulfuric acid?

The combustion of butane, #C_4H_10#, produces carbon dioxide water. When one sample of butane was burned, 4.46 grams of water was formed. How many grams of oxygen gas were consumed?

Question #b5376

What was the heat lost from the system if #"5.25 g"# of water was cooled from #64.8^@ "C"# to #5.5^@ "C"#? #C_P = "4.184 J/g"^@ "C"#

An object with a mass of #120 g# is dropped into #800 mL# of water at #0^@C#. If the object cools by #30 ^@C# and the water warms by #5 ^@C#, what is the specific heat of the material that the object is made of?

Question #f16a3

Aluminum sulfate, #Al_2(SO_4)_3#, decomposes to form aluminum oxide, #Al_2O_3#, and sulfur trioxide, #SO_3#. How do you write the balanced equation for this reaction?

How do you prove #cosx= 1/(cosxsinx tanx)#?

How many grams of #CuSO_4# are present in 652 mL of .250 M #CuSO_4# solution?

How to simplify #6.2 times 10^3 + 4.5 times 10^2 # in scientific notation?

Question #71843

If 0,5kg of dextrose is dissolved in 600ml of water to produce a solution with a final volumeof 1000ml what is the percentage w/w strength of the solution?

Question #c87b5

Question #115aa

Question #d0f0e

How do you simplify each expression using positive exponents #m^3 n^6 p^0#?

How do we represent the heat evolved in exothermic reactions?

The density of platinum is #21.5# #g##/##cm^3# at 25°C. What is the volume of 79.5 g of platinum at this temperature?

Question #41282

How do you use PEMDAS to simplify #4(96)^2#?

Question #719a9

How do you solve #x = y + 3# and #2x + y = 9# using substitution?

Question #1cb20

How do you solve #7x+30 =5#?

Sharon purchased land in 1970 for $40,000. That land increased in value approximately 3% per year. In 2005 Sharon decided to sell the land. How much could she reasonably ask as a selling price?

Question #425b9

Question #55b04

What is the density of a piece of wood that has a mass of #25.0# #g# and a volume of #29.4# #cm^3#?

Question #292bf

The annual interest rate of Erika's savings account is 6.4%, and simple interest is calculated quarterly. What is the periodic interest rate of Erika's account?

How do you solve #4y  1/10 = 3y + 4/5#?

Question #89a6e

An astronaut with a mass of #85 kg# is floating in space. If the astronaut throws an object with a mass of #20 kg# at a speed of #5/8 m/s#, how much will his speed change by?

How to simplify #(2times10^4) (3times10^2)# in scientific notation?

Question #449b7

Question #a1c07

How do we represent the #"sulfate ion"#?

Question #06d81

Question #fb855

Question #3dbe1

Question #e7eb1

How do you write #0.045# in scientific notation?

Question #e7d7a

What is the volume of a solution that has a specific gravity of 1.2 and a mass of 185 g?

Question #8d154

In the reaction #4Fe + 3O_2 > 2Fe_2O_3#, how many grams of #Fe_2O_3# are produced from #73.2g# #Fe#?