07/04/18

The pH reading of a sample of each substance is given. Calculate the hydrogen ion concentration of the substance. (Give your answers in scientific notation, cor
for 5.4 ph value
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07/04/18

he pH reading of a sample of each substance is given. Calculate the hydrogen ion concentration of the substance. (Give your answers in scientific notation, corr
write in scientific notation
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07/03/18

After a 65% reduction, you purchase a new washer for $175. What was the original price?
I need to know the original price before the discount 
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07/02/18

Physical Science Math
Bismuth and fluorine react to form bismuth fluoride. If 417.96 g of bismuth reacts completely with 113.99 g of fluorine, how many grams of bismuth fluoride are formed?
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07/01/18

Cameron saved $375 towards the purchase of a smart phone. If the smart phone costs $659, how much more money does Cameron need to save
hey guys, i need a answer and a equation for this, can u help me
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07/01/18

If Daniela bought 12 identical rechargeable batteries for $60, what is the cost of each battery
i need a equation for this, please
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07/01/18

jessica, bob and ravi have atotal of $120 in their wallets. Bob has three times what Ravi has. Ravi has 410 less than jessica. How much do they have in their wa
math wod problem  
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06/30/18

What is the molar mass of Pb(SO4)2? Explain how you calculated this value.
Also, how do you figure out the molar mass? My lesson does a really bad job of trying to explain it. 
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06/29/18

Physical Science Math
A volume of helium occupies 1.0 L at a pressure of 98.0 kPa. What is the new volume if the pressure drops to 86.2 kPa? Show work.
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06/29/18

If 3x + 2 / x is equal to 7 then find 9 x square minus 4 / x square
This question was quite different for my ability
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06/28/18

Aspirin Synthesis Lab - What chemicals are present in each step?
Aspirin is prepared from salicylic acid via an esterification reaction, which involves forming an ester (ASA) from an alcohol (salicylic acid) and carboxylic acid derivative (acetic anhydride), in... more
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06/28/18

Gas Laws Math
6. A container holding a gas at 500atm is held at 298K (room temperature). What is the pressure of the gas in the container when it is heated to 1000K? 7. Why is the situation in #6 dangerous?
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06/28/18

Gas Laws Math
The pressure of a gas trapped inside a 10ml test tubeis originally 1atm. When the pressure on the tube is increased to 5atm, what will be the volume of gas trapped inside the cube?
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06/27/18

true or false When something is soluble, it dissolves and forms an aqueous solution which we represent with (aq)
true or false when somethign is soluble it deissolves and forms an aqueous solution which we repreesent with (aq)
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06/25/18

7 free throws for every 3 free throws that she misses If she missed 27 free throws at her last practice how many free throws did she make
please helpppppppppppppppppppppppppp
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06/25/18

What will be the actual area of the entire deck? Use 3.14 for π. Round your answer to the nearest hundredth of a square foot. Explain how you found your answer.
I need help since day one and need it now really bad.
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06/25/18

a yogurt cost 35p. how many yogurts can be bought for three pounds
its for my math questions
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06/24/18

2NaN3 —> 2Na + 3N2 If you have 32 g of NaN3 using the equation above, determine...
2NaN3 —> 2Na + 3N2 If you have 32 g of NaN3 using the equation above, determine: A.) What is the limiting reactant? B.) How many moles of Na and N2 will be produced? C.) What is the percent... more
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06/18/18

An important formula from chemistry is PV=nrt PV=nrt . Solve the formula for t.
for advanced geo 
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06/18/18

Z is jointly proportional to x^2 and y^2 . If z = 48 when x= 7 and y = 3 , find z when x= 6 and y = 8
What is z
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06/18/18

Andy has $14 more than Jack. Jack has $21. Solve the equation A – 14 = 21 to determine how much money Andy has.
 i need help pls
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06/18/18

A crown made of alloy of gold and silver has a volume of 60cm3and mass of 1050g.find mass of gold if density of gold is 19.3g/cm3 while of silver is 10.5g/cm3
Find mass of gold if density of gold is 19.3g/cm3,while that of silver is 10.5g/cm3
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06/05/18

A solution is prepared by dissolving 100.00g sucrose (mm of sucrose = 343g) in 50g water. The volume of the resulting solution is 52mL. Calculate the ff.
A) Molarity B) Molality C) Mole fraction  D) mass % E) density of the solution
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06/05/18

A solution is made of 2.00g sucrose in 100.00g H2O (molecular weight of sucrose is 342g/mol). Calculate the a.) boiling point and b.) freezing point of the solu
I really need help...
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06/02/18

Hess's law problem. Please help.
5. Using the following data and Hess’s law, calculate the standard heat of formation (ΔHof) for the compound, ICl (g), in KJ/mol: Cl2 (g) → 2 Cl (g) ΔHorxn = 242.3 KJ I2 (g) → 2 I (g) ΔHorxn =... more
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