04/11/21

A city started with a population of 16,000, and it grew at the rate of 7% per year. The current population is 27,490. How many years did it take to reach this size
growth and decay for algebra 2
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04/11/21

When finding pH of acidic buffer solution using Ka, why do we use the salt concentration in the Ka equation?

for example when CH3COOH and CH3COONa are used to make a buffer solution, why we use the [CH3COO-] of the salt in the Ka equation of the acid? isn't the [CH3COO-] from acid not the same... more
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04/11/21

to obtain pure lead
1.     To obtain pure lead, lead (II) sulfide is burned in an atmosphere of pure oxygen. The products of the reaction are lead and sulfur trioxide (SO3). Write a balanced chemical equation for this... more
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04/10/21

How do you solve for volume to volume conversions and empirical formula?
Determine the molecular formula of the compound with an empirical formula of CH and a molar mass of 78.110 g/mol.
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04/10/21

How do you solve for volume to volume conversions and empirical formula?
2. Ammonia is often formed by reacting nitrogen and hydrogen gases. How many liters of ammonia gas can be formed from 24.5 L of hydrogen gas at STP?                            N2(g)  +  3... more
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04/10/21

How do you solve for volume to volume conversions and empirical formula?
1. The combustion of propane gas produces carbon dioxide and water vapor.                     C3H8(g)  +  5 O2(g)  →  3 CO2(g)  +  4 H2O(g)(A) What volume of oxygen is required to completely... more
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04/10/21

dissolved oxygen
Two samples were collected simultaneously at the same spot in a river for dissolved oxygen analysis. One sample was fixed immediately after collection, and the other was treated later in the... more
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04/10/21

How many grams of oxygen and grams of hydrogen are produced from the decomposition of 10.0 grams water? (write the equation and balance) H2O → H2 + O2
How many grams of oxygen and grams of hydrogen are produced from the decomposition of 10.0 grams water? (write the equation and balance)    H2O →  H2 + O2Please look at my profile. I have more... more
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04/10/21

When magnesium reacts with copper (II) chloride, how many grams of copper are produced from 50.6 grams of magnesium? (finish the equation and balance) Mg + CuCl2 🡪 MgCl2 + Cu
 When magnesium reacts with copper (II) chloride, how many grams of copper are produced from 50.6 grams of magnesium? (finish the equation and... more
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04/10/21

Calculate the number of grams of product, given the synthesis reaction between aluminum with 6.0 mols of oxygen. (finish the equation and balance) Al + O2 —> Al2O3

This is basic Stoichiometry. I need help please, i would be really grateful for a response, I am very confused.
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04/10/21

Calculate the mass of carbon dioxide produced from the combustion of 11.2 g of C4H6. (finish the equation and balance) C4H6 + O2 —-> CO2 + H2O
Need help please Calculate the mass of carbon dioxide produced from the combustion of 11.2 g of C4H6. (finish the equation and balance)               C4H6  +   O2 🡪   CO2 +  H2O
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04/10/21

If 201 g Fe2O3 is reacted with excess CO, what mass of CO2 will be produced? Fe2O3(s) + 3CO(g) → 3CO2(g) + 2Fe(s)
I need help ASAP
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04/10/21

A flashbulb of volume 2.40 mL contains O2(g) at a pressure of 2.30 atm and a temperature of 18.0 °C. How many grams of O2(g) does the flashbulb contain? g

A flashbulb of volume 2.40 mL contains O2(g) at a pressure of 2.30 atm and a temperature of 18.0 °C. How many grams of O2(g) does the flashbulb contain?     g   
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04/09/21

2 H2 + O2 → 2 H2O How many grams of water can be formed from 5.96 moles of oxygen gas?
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04/09/21

If 4.8 mol H2O2 decomposes, what volume of oxygen will be produced? (assume the density of oxygen is 1.429 g/L)

2H2O2 (aq) --> 2H2O (I) + O2 (g)
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04/09/21

A container of gas is initially at 0.500 atm and 45 ˚C. What will the pressure be at 225 ˚C?

Show work
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04/09/21

Determine the pressure change when a constant volume of gas at 1.50 atm is heated from 30.0 ˚C to 45.0 ˚C.

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04/08/21

What mass in grams of NaN3 is required to produce 50.2 L of N2 gas (density = 1.25 g/L) according to the balanced chemical reaction: 2NaN3(s) > 2Na(s) + 3N2(g)
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04/08/21

chem help please
f a 0.738 g block of sodium is placed in excess water, heat and a gas are produced. If the gas is at 276oC and the atmospheric pressure that day is 0.927 atm, how many milliliters of gas is produced?
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04/07/21

Give an expression to represent the area of a rectangle whose side lengths are represented by (2x−16)/2x and 2x(x+4)/(x−8)
State any restrictions.  (Hint:A=l⋅w)
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04/06/21

If 8 coins weigh 32 ounces, how many coins weigh 88 ounces? (a) 22 coins (b) 128 coins (c) 4 coins (d) 352 coins (e) 64 coins
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04/06/21

chemistry gas laws
What is the volume of a 4.31-mol sample of methane gas at 38.50 degrees Celsius and 0.983 atm?
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04/06/21

Gas Laws Assessment

A sample of gas at 28.60 degrees Celsius and 698.2 mmHg occupies a volume of 36.75 Liters. What volume would it occupy at 52.43 degrees Celsius and 754.0 mmHg?
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04/06/21

Stoichiometey problem
The balanced equation is 3H2 + N2 —> 2NH3If you need to make 2.00g of the NH3, what would be the mass of the reactants needed? The reactants are H2 and N2
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04/05/21

The reaction of phosphorus with chlorine to make phosphorus trichloride has a yield of 78%. in order to produce 512 g of phosphorus trichloride how many grams of phosphorus will you need?
P4 + 6Cl2 —> 4PCl3 512.00g 147.90g 656.00g 591.60g 137.50g
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