Brittany M.

03/09/24

If an atom has 7 protons, 8 neutrons and 4 electrons, what is the atom’s atomic symbol?

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10/16/23

Determine the molar enthalpy (in kJ/mol) for the reaction 4 NH₃ (g) + 5 O₂ (g) → 4 NO (g) + 6 H₂O (g).

Using the equations N₂ (g) + O₂ (g) → 2 NO (g) ∆H° = 180.6 kJ/mol N₂ (g) + 3 H₂ (g) → 2 NH₃ (g) ∆H° = -91.8 kJ/mol 2 H₂ (g) + O₂ (g) → 2 H₂O (g) ∆H° = -483.7 kJ/mol Determine the molar enthalpy... more

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Chemistry

06/01/23

General Chemistry Question

The normal freezing point of benzene (C6H6) is 5.5 °C. If 29.53 grams of the nonvolatile nonelectrolyte 5-bromo-2-naphthoic acid (C11H7BrO2), are dissolved in 170.8 grams of benzene, what is the... more

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Chemistry

11/29/22

A 25.0 mL solution of HCl is neutralized with 12.2 mL of 0.240 M Ba(OH)₂. What is the concentration of the original HCl solution?

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Chemistry

10/22/22

How many mL of 0.0850 M NaOH are needed to titrate each of the following solutions to the equivalence point?

a. 50.0 mL of a solution that contains 1.85 g of HCl per liter of solution

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Chemistry Statistics Biostatistics

10/21/22

how are detection limits related to standard deviations and why does this relationship exist?

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Chemistry

05/22/22

Can somebody please answer is question

If 38.3 L of 0.666 M KOH is required to completely neutralize 21.5 L of a CH3COOH solution, what is the molarity of the acetic acid solution? ______M

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Chemistry

05/07/22

the tutor did not show up

My tutor did not show up. will i be charged

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Chemistry

03/02/22

Chemistry question

How many grams of ZnCl2 be produced from 30 grams of Zn and 13.0 grams of CuCl2? And what is the limiting reactant

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Chemistry Biochemistry Organic Chemistry

10/26/20

Titration: Back Titration

36.8 mL of 1.92 M perchloric acid is added to 43.3 mL of sodium hydroxide, and the resulting solution is found to be acidic.26.7 mL of 0.693 M barium hydroxide is required to reach neutrality.What... more

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Physical Science

09/04/20

Conversion Practice

Ok I have been explained how to do this but I still can't understand. How correctly convert between units of the metric system. Like explain it for dummies. Because I still don't understand it.

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Physical Science

09/04/20

What is the volume (in cm3) of iron would be needed to balance a 2.20 cm3 sample of lead on a two-pan laboratory balance?

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Chemistry

09/03/20

Rearrange the following equation to solve for c: 35A/5c = 2R/10M

A. c = 35AM/RB. c = R/35AMC. c = 35R/10AMD. c = 2R/35AM

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Chemistry

05/21/20

Which solution is more concentrated?

1.05 x 10-5M or 1.05 x 104M

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Chemistry Biochemistry Organic Chemistry

05/20/20

A bottle of Bourbon Whiskey contains 250.ml of liquid and 42% alcohol (C2H5OH). assuming density = 1.05g/ml, will the whiskey freeze if put into a -20.0 degree celsius freezer?

can someone please explain.

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Chemistry

05/15/20

4. How much water should be added to 50 mL of 12 M hydrochloric acid to produce a 4.0 M solution?

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Chemistry

05/14/20

How to solve for the answer

I would like to get help on how to solve this problem. What is the H3O+ of a solution with a pH of 1.8?

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Chemistry

05/14/20

For any acidic or basic salts, complete the chemical equations that show how those substances react with water.

HCO3- +HO⇋ AndH8C4H4O- + HO⇋

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Chemistry

05/14/20

EMERGENCY HELP PLEASE

23. Calculate the equilibrium constant for the following reaction at 655 K. HCN(g) + 2 H2(g) → CH3NH2(g) ΔH° = -158 kJ; ΔS°= -219.9 J/K a) 39.9 b)... more

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Chemistry

05/14/20

If 300 of a NaOH solution are required to neutralize 50 mL of a 6 M H3PO4 solution, what is the concentration of the NaOH solution?

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Chemistry

05/14/20

Acid Base PH, POH

A solution contains 0.00568 M HCl. Determine the [H3O^+] for the solution.Determine the [OH^−].Determine the pH value for the solution.

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Chemistry

05/14/20

Determine the concentration of [OH–] ions in an aqueous solution where the pH = 5.22

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Chemistry

05/13/20

In an experiment, 225 mL of wet hydrogen gas is collected over water at 27 degrees Celsius and a barometric pressure of 748 torr. How many grams of Zn have been consumed?

The vapor pressure of water at 27 degrees Celsius is 26.74 torr.Zn (s) + H2SO4 (aq) yeilds ZnSo4 (aq) + H2 (g)

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Science Chemistry

04/16/20

Which of the following elements has the highest ionization energy? a. Ba b. Ca c. Cl d. Ne

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Chemistry

04/01/20

Consider the balanced equation for the following reaction: 13O2(g) + 2C4H10(g) → 8CO2(g) + 10H2O(l)

Determine the theoretical yield of CO2(g) in grams if the percent yield of CO2(g) is 68.0% and 3.64 moles of CO2(g) forms.(question didn't fit)

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If an atom has 7 protons, 8 neutrons and 4 electrons, what is the atom’s atomic symbol?

Determine the molar enthalpy (in kJ/mol) for the reaction 4 NH₃ (g) + 5 O₂ (g) → 4 NO (g) + 6 H₂O (g).