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# daniela

• ### HELPPP!!!!!!!!!?

Write a reaction showing how HF and NaF buffer would neutralize added NaOH.

• ### help me plz?

The mass percent of sodium chloride in seawater is 3.5%. How many liters of seawater must be evaporated to obtain 522.8 g of sodium chloride. The density of seawater is 1.026 g/mL.

• ### What is the value of the equilibrium constant at this temperature? Express your answer to three significant figures.?

Consider this reaction:

CO(g)+H2O(g)⇌CO2(g)+H2(g)

An equilibrium mixture of this reaction at a certain temperature was found to have [CO]= 0.0253 M , [H2O]= 0.0145 M , [CO2]= 0.205 M , and [H2]= 0.0324 M .

Determine the volume of 0.250 M KOH solution required to neutralize each sample of sulfuric acid. The neutralization reaction is:

H2SO4(aq)+2KOH(aq)→ K2SO4(aq)+2H2O(l)

1)15 mL of 0.250 M H2SO4

2)170 mL of 0.140 M H2SO4

3)55 mL of 0.100 M H2SO4

• ### A 5.0 L sample of a 5.3 M NaCl solution is diluted to 75 L .?

What is the molarity of the diluted solution?

• ### Determine the theoretical yield of C when each of the following amounts of A and B are allowed to react in the generic reaction: 2A+3B→2C?

3 molA ; 3 molB

5 molA; 6 molB

• ### Determine the theoretical yield of C when each of the following amounts of A and B are allowed to react in the generic reaction: 2A+3B→2C?

4 molA; 5 molB

For the reaction shown, calculate how many moles of NH3 form when each amount of reactant completely reacts.

3N2H4(l)→4NH3(g)+N2(g)

Chemistry2 months ago
• ### Calculate the mass of water produced when 8.75 g of butane reacts with excess oxygen.?

Butane, C4H10, reacts with oxygen, O2, to form water, H2O, and carbon dioxide, CO2, as shown in the following chemical equation:

2C4H10(g)+13O2(g)→10H2O(g)+8CO2(g)

The coefficients in this equation represent mole ratios. Notice that the coefficient for water (10) is five times that of butane (2). Thus, the number of moles of water produced is five times the number of moles of butane that react.

Also, notice that the coefficient for butane (2) is one-fourth the coefficient of carbon dioxide (8). Thus, the number of moles of butane that react is one-fourth the number of moles of carbon dioxide that you produce.

But be careful! If you are given the mass of a compound, you must first convert to moles before applying these ratios.

ANSWER THREE SIGNIFICANT FIGURES AND INCLUDE APPROPRIATE UNITS.

• ### Hydrochloric acid can dissolve solid iron according to the following reaction. Fe(s)+2HCl(aq)→FeCl2(aq)+H2(g)?

What minimum mass of HCl in grams would you need to dissolve a 3.0 g iron bar on a padlock?

question 2. How much H2 would be produced by the complete reaction of the iron bar?

help.

Chemistry2 months ago

help.

HELP.

• ### List the number of each type of atom on the left side of the equation 2C6H14(l)+19O2(g)→12CO2(g)+14H2O(g)?

enter your number separated by commas

Chemistry2 months ago
• ### PCI3 !HELP?

Calculate the mass percent composition of each constituent element in phosphorus trichloride.

Chemistry2 months ago