08/10/22

How many grams of NaN3 will make 4.0 gal of nitrogen gas

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01/11/22

What's the answer to this question? Steps?
A 20.0 mL sample of ammonia was titrated with 12.6 mL of 0.25 mol/L HCl. What was the initial concentration of the ammonia? A) 0.16mol/L B) 0.097mol/L C) 0.25mol/L D) none of these
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01/11/22

S   +   6 HNO3 →  H2SO4  +  6 NO2  +   2 H2O
S   +   6 HNO3 →  H2SO4  +  6 NO2  +   2 H2OIn the above equation, how many grams of water can be made when 13.6 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more
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01/11/22

What is the pH of a 0.350 M solution of lithium citrate? (Ka Citric Acid = 7.4 x 10-4)
I'm struggling to answer this one. Would appreciate a simple explanation if possible.
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01/10/22

Can someone please help me with this Chemistry question

Magnesium metal reacts with hydrochloric acid according to the following equation:Mg (s) + 2HCl (aq) ---> MgCl2 (aq) + H2 (g)When 0.425 grams of magnesium was added to 150.0 mL of 1.00 M HCl in... more
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01/09/22

Chemistry Doubt -

In the gold foil experiment, how did Rutherford know that Radium emitted alpha particles only? Radioactive elements can emit any radiations right? So how did he know that they were only alpha... more
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01/06/22

solubility and precipitation
Consider each of the following aqueous solutions being mixed. Based on solubility rules, determine whether a reaction will occur or not. If a reaction will occur: a. Write a complete balanced... more
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12/28/21

Select the conjugated pairs
Select the conjugated pairs NH4+ + OH- ————>NH3 + O2HCan we say NH3 is a base and NH4 is conjugate acid?
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10/13/21

Calculate the number of: a) grams of chlorine in 18 g PbCl2 b) grams of chlorine in 18 g PbCl2
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09/21/21

Calculate the number of grams

Calculate the number of grams of xenon in 5.697g of the compound xenon tetrafluoride.
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09/19/21

General Chemistry HW
How many moles of CaCO3 are there in an antacid tablet containing 0.500 g CaCO3? ______ mol CaCO3How many formula units of CaCO3 are in this tablet?_______ formula units
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09/14/21

Balance equation

Complete the following equations and balance ∆A.       Na2CO3·10H2O →        B. MgSO4·7H2O → 
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09/14/21

What was the mass of the anhydrous salt?
A hydrate of aluminium chloride, AlCl3 X H2O was used. Empty crucible - 15.807gCrucible + hydrate 17.061gCrucible + content after 1st heat ... more
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09/14/21

The rate constant for a reaction is measured as a function of time. A plot is created by graphing ln(k) on the y-axis and 1/T on the x-axis, and a best fit line with a slope of -98,535 K is obtained.
Based on this data what is the activation energy of this reaction (in kJ/mol)?R= 8.314 J/(K mol)Enter your value with three significant figures.
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09/12/21

Recall Planck's constant equals
Recall Planck's constant equals 6.63 × 10−34 J·s and the speed of light is 3.00 × 108 m/s. Calculate the wavelength (in nm) of a photon emitted by a hydrogen atom when its electron drops from... more
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09/10/21

Calculate the pH
Calculate the pH of a 0.35 M solution of sodium carbonate (Na2CO3). For H2CO3 Ka1 = 4.46 x 10-7 and Ka2 = 4.69 x 10-11.
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