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How do we represent the heat evolved in exothermic reactions?

Question #54da7

Question #b5376

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#?

How do you write #0.045# in scientific notation?

Question #c65e7

Question #115aa

Question #449b7

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?

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

Question #1aa06

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"#

Question #d0f0e

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

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

Question #71843

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

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.

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 #06d81

Question #1bdae

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 #8994e

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?

Question #719a9

Question #292bf

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

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

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

Question #a0976

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

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

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

Question #f16a3

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?

Question #8d154

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?

Question #41282

Question #3dbe1

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

Question #89a6e

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

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

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?

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

Question #e7eb1

Question #1cb20

Question #1830f

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

Question #c87b5

Question #55b04

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 #425b9

Question #fb855

Question #a1c07

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 #e7d7a