06/22/19

PV=nRT I would greatly appreciate it thank you in advance :)

P V N Ta) 7.74x10^3 Pa 11.7mL ? mol 25° Cb) ? atm 43.0mL 0.435mol 223° Kc) 467torr ... more
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06/22/19

Hg2O(s) -> Hg(l) + O2 (g) (unbalanced)

Calculate the volume of oxygen gas, measured at 30.0C and 725 torr that can be produced from complete decomposition of 8.94 grams of mercury(II) oxide. Answer has to be in Liters (L)
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06/22/19

Chemistry, Acid-Base Titration
.0500 L of HCl are placed in an Erlenmeyer Flask. 40.05 mL of 0.250M NaOH are added to the buret to reach the end point. What is the concentration of HCl in the Erlenmeyer Flask?
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06/22/19

Chemistry homework of PV=NRT
Complete the following: P V n T a) 7.74x10^3 Pa 12.8mL ? Mol 25° Cb) ? atm 43.0mL ... more
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06/22/19

Chem homework of PV=nRT
Complete the following : P(atm). V(L). N(mol). T 1) 5.52 ? 2.00 155° C2) 0.300 2.21 ? 155° K3) 4.47 25.0 ... more
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06/22/19

Chemistry homework

The method used by joesph priestly to produce oxygen made use of the thermal decomposition of mercury (II) oxide: HgO(s)->Hg(l)+O2 (unbalanced)calculate the volume of oxygen gas measured at 30.0... more
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06/21/19

Chemistry homework

A ballon is filled to a volume of of 7.10 x 10^2 mL at a temperature of 24.0 degrees C. The ballon is then cooled at constant pressure to a temperature of 1.37 x 10^2 K. What is the final volume of... more
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06/21/19

What is the maximum Mass that can be produce from a mixture of 2.00*10³g N2 and 8.00*10⁴g H2
How can will find the maximum Mass of ammonia
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06/20/19

What is the double replacement reaction for sodium phosphide and Na2O
What is the double replacement reaction for sodium phosphide and Na2O
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06/20/19

Frequency in Hz

What would be the frequency (in Hz) of the photon emitted by a He+ ion, if it relaxed from the n = 3 energy state to the n = 2 energy state?
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06/20/19

Atomic Orbitals

Give an allowable set of quantum numbers for a 3s electron. What is the maximum number of 3s electrons that can be present in an atom? n ________ l ________ ml ________ ms ________Maximum number... more
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06/19/19

How many grams of H2 are needed to react with 2.15 g of N2?
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06/19/19

Solve for "x". M=xY
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06/19/19

what is the final answer?
A 95.13 g piece of metal is submerged in a graduated cylinder, causing the water level to rise from 38.838 mL to 61.019 mL. What is the density of the metal?
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06/18/19

Supercritical CO2 for staining a brain with OsO4?
I'm trying to stain a whole mouse brain with OsO4 for imaging with electron microscopy, and I'm wondering about using supercritical CO2 to facilitate the staining.Any insight into whether this... more
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06/18/19

the time required in years for an amount of Sr 90 whose half life is 28 year to be reduced by 75%
the time required in years for an amount of Sr 90 whose half life is 28 year to be reduced by 75%
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06/18/19

Stochiometry question.
Use the below equation, how many grams of lithium nitrate is required to produce 250g of lithium sulfate?Pb(SO4)2 + 4LiNO3 = Pb(NO3)4 + 2Li2SO4
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06/18/19

help me please i don't understand

The pressure of a gas 𝑃 varies inversely with its volume 𝑉. The pressure of 80 𝐿 of a gas is 7 psi. Write the variation equation for the situation. What is its pressure when the same gas is... more
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06/17/19

Many theories regarding the structure of the atom have been proposed over the course of time. Which of the following persons first suggested that the nucleus contains positively charged protons?
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06/17/19

how to solve this question
how many moles each of sodium acetate and acetic would you add to make a 2L solution of 0.04M acetate/acetic acid buffer
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06/16/19

Formula for this please
If 16.8 L of carbon dioxide gas is produced at STP in the following reaction, how many grams of methane (CH4) were burned?
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06/16/19

If 6g of Magnesium is allowed to react with 20 g of oxygen, what mass of magnesium oxide will be produced in the reaction?
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06/16/19

The half-life for the radioactive decay of calcium-47 is 4.5 d. If a sample has an activity of 5.0 Ci after 27 d , what was the initial activity of the sample?
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06/15/19

What mass of NaCrO2 can be obtained from the reaction of 7.40 g Cr(OH)3 with 7.60 g NaOH in this reaction Cr(OH)3+ NaOH->NaCrO2+2H2O what is the limiting reactant
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06/15/19

Cr(OH)3+NaOH -> NaCrO2+ 2H2O how many grams of NaCrO2 can be produced from 83.3g of Cr(OH)3
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