05/25/21

Highschool Chemistry Question

How many milliliters of 0.108 M KOH must be used neutralize completely 20.0 mL of 0.142 M H3PO4 (aq) solution? 1 H3PO4 (aq) + 3 KOH (aq) → 3 H2O (l) + 1 K3PO4 (aq)

05/10/21

You are planning an experiment that requires 0.137 mol of nitrogen monoxide gas (NO). What volume would you need at STP? Answer in units of L.

You are planning an experiment that requires 0.137 mol of nitrogen monoxide gas (NO). What volume would you need at STP? Answer in units of L.

which of the following gives the relative size of Ka and pH of a 0.10 M solution of HEX3(aq)?

HEX3(aq) + H2O(l) ⇌ H3O+(aq) + EX3−(aq)∆Go = +47 kJ/molrxnThe reaction between the acid HEX3(aq) and water is shown above. Based on the chemical equation and the value of ∆Go given above, which of... more

05/07/21

use conversion factors to perform the following conversions

how many moles of hydrogen are in 65.78 grams of water?

05/06/21

general chemistry 1

When methanol, CH3OH, is burned in the presence of oxygen gas, O2, a large amount of heat energy is released. For this reason, it is often used as a fuel in high performance racing cars. The... more

Complete the following reaction:

Complete the following reaction:HCO3-1 +HPO4-2 -->

04/22/21

What is the [OH-1] concentration if the pH is 11.32?

1.) 2.68 x 10-42.) 0.0021 M3.) 4.79 x 10-9 M4.) 1 x 10-14 M5.) 7.00 x 10-14 M

04/22/21

Which molecule has the highest boiling point?

Br2 Cl2 H2 F2 I2

04/22/21

Teacher never explains his work

In the reaction below, how many moles of A2 will be used to produced 2.45 mol of XA?a. Balance the chemical equation:   XY₃ +   A₂ →   XA +  Y2Ab.    moles A2

04/21/21

ASAP answer please with all steps

ASAP answer please with all steps 8.0 mL of 0.10 M HCl is titrated with 0.10 M NaOH. Perform the following calculations pH of the acid before any NaOH is added Volume of 0.10 M NaOH needed to... more

04/21/21

ASAP answer please with all steps

ASAP answer please with all stepsTo make a buffered solution of HX and NaX with a pH of 6.11, what mass of NaX (MM 130.5 g/mol) must be added to 250.0 mL of a 1.0 M solution of HX?Ka of HX is 1.72... more

04/21/21

ASAP answer please with all steps

To make a buffered solution of HX and NaX with a pH of 6.11, what mass of NaX (MM 130.5 g/mol) must be added to 250.0 mL of a 1.0 M solution of HX?

04/21/21

Calculate ΔG° Given Cell Reaction, Ec+(–Ea)

Use the standard reduction potentials located in the 'Tables' linked above to calculate the standard free energy change in kJ for the reaction:Ni²+ (aq) + 2Cr²+ (aq) → Ni(s) + 2Cr³+ (aq)_______kJK... more

04/19/21

Find the molarity of 1.15 g KF in 150 mL of water

04/19/21

Determine the rate law, including the values of the orders and rate law constant, for the following reaction using the experimental data provided.

A+B yields productsTrial 1 A-0.10M B-0.20M rate- 1.2 x 10^-2 m/mintrial 2 A-0.10M B- 0.40M rate-4.8 x 10^-2 m/mintrial 3 A- 0.20M B-0.40M rate-9.6 x 10^-2 M/min

04/19/21

At 22 °C, an excess amount of a generic metal hydroxide, M(OH)2, is mixed with pure water.

The resulting equilibrium solution has a pH of 10.26.  What is the 𝐾sp of the salt at 22 °C?Ksp= ?

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