04/26/23

The most common ion for chromium has a charge of 2+. What element in the same period as chromium has a smaller ionic radius?
The most common ion for chromium has a charge of 2+. What element in the same period as chromium has a smaller ionic radius? bromine  calcium  germanium  manganese  none of the above
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04/26/23

What element in the same group as polonium has a lesser electronegativity?
What element in the same group as polonium has a lesser electronegativity?  oxygen  selenium  sulfur  tellurium  none of the above
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04/25/23

Chemistry 11 grade
What is pH of 2.2x 10^-3 M of NaOH ? What is pOH of 3.6 x10^-4M of H2SO4 ? What is pH of 2.98 x10^-2M of HCl ?Whay is pOH a 6.97 x 10^-5 M of KOH ?
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04/24/23

Stuck on how to solve this

20) What is the volume of a 1.50 M solution if it contains 55 g of ammonium chloride?
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04/24/23

Intro To Chemistry
You have 3 moles of C2H6O. How many moles of carbon are in 3 mol of C2H6O?  moles How many moles of hydrogen are in 3 mol of C2H6O?  moles How many moles of oxygen are in 3 mol of C2H6O?  moles more
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03/23/23

Step by step chemistry

How many mmHg are in 75.7 kpa? Round to 1 decimal place and answer in numbers ONLYHow many torr are in 84.2 mmHg? Round to 1 decimal place and answer in numbers ONLy
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03/22/23

How many moles of carbon disulfide ( CS2 ) are in 47.5 g of the compound?
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03/21/23

A scuba diver ascends too quickly and develops the bends.

A scuba diver ascends too quickly and develops the bends. A nitrogen bubble has formed in the patient's elbow. At a depth of 55 ft,55 ft, where the pressure is 2.66 atm,2.66 atm, the bubble had a... more
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03/08/23

2 Al + 3 CuCl2 → 2 AlCl3 + 3 Cu, If 0.252 moles of copper (II) chloride completely reacts, how many grams of aluminum chloride were produced in the reaction?
(Molar mass of Al = 26.98 g/mol) (Molar mass of AlCl3 = 133.34 g/mol) (Molar mass of CuCl2 = 134.45 g/mol) (Molar mass of Cu = 63.55 g/mol)
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03/06/23

how many grams of H2O will be produced from 68.3 grams of C6H8O7?

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03/06/23

stoichiometry question
Determine the moles if given 36.4g of potassium.
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03/06/23

Stoichiometry Question

Is 6.02x10^23 molecules of carbon monoxide greater than, less than, or equal to 1 mole of carbon dioxide molecules?Is 1 mole carbon monoxide greater than, less than, or equal to1 mole of carbon... more
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03/06/23

4) PCl5 + H2O → H3PO4 +HCl What is the ratio of H2O to H3PO4? How many moles of H3PO4 are produced when12 moles of H2O are fully reacted with PCl5?

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03/05/23

If 28.0 g of NaOH is added to 0.550 L of 1.00 M Ni(NO₃)₂, how many grams of Ni(OH)₂ will be formed in the following precipitation reaction? 2 NaOH(aq) + Ni(NO₃)₂(aq) → Ni(OH)₂ (s) + 2 NaNO₃ (aq)
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03/05/23

What mass of MgBr₂ in grams are in 215 mL of a 0.350 M solution of MgBr₂?
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03/05/23

Given the following reaction: CH4+ 2O2 -> CO2 + 2H2O, How many grams of CO2 will be produced from 15.0 g of CH4 and 114 g of O2? round to 3 significant figures

Given the following reaction: CH4+ 2O2 -> CO2 + 2H2O, How many grams of CO2 will be produced from 15.0 g of CH4 and 114 g of O2? round to 3 significant figures
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03/05/23

A sample of a gas occupies 1810 mL at 319◦C and 740 torr. At what temperature would it occupy 1586.8 mL if the pressure is kept constant? Answer in units of ◦C.
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03/04/23

An unknown weak acid with a concentration of 0.090 M has a pH of 1.80. What is the Ka of the weak acid?
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06/15/21

4NH3 + 5O2 = 4NO + 6H2O How many grams of O2 are needed to completely react with 3.315 moles of NH3?

Grateful for any help given!
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