129 Answered Questions for the topic chem

22h

Can someone help me I’m stumped

So I’m just missing in naming this four compounds, and I’ve gotten them wrong in all my tries.1- CH3CH2CHCH3 | CH2CH3 CH3 |2-... more

1d

Trigonal Bipyramids? Confused.

Which of the following compounds exhibit trigonal bipyramidal electron geometry? Select true if the molecule exhibits trigonal bipyramidal electron geometry. Otherwise, select false. IF5 SF6 KrCl2... more

3d

Can someone help me with these

Draw the structural and condensed formulas of "4-Ethyl-2-hexene" and "3-Isobutyl-1, 4-pentadiene"for "4-Ethyl-2-hexene i put for structural formula H H H H H | | | | ... more

3d

Help can someone check my work

Draw the condensed formulas of 3-hexene and 2-methylbutane3-hexeneCH3CH2CH=CHCH2CH32-methylbutaneCH3|CH3-CH-CH2-CH3 Draw the structural formula of 3-pentyne. What is wrong with this... more

4d

What volume (in mL) of 4.46 M HCl is required to fully react with 19.3 mL of 2.13 M Ca(OH)2?

Consider the following balanced equation.2HCl (aq) + Ca(OH)2 (aq)  2H2O (l) + CaCl2 (aq)

4d

Calculate the amount of heat absorbed (in kJ) when 35.15 g of CO2 reacts.

2Fe3O4 (s) + CO2 (g)  3Fe2O3 (s) + CO (g)     H = 47.2 kJ

4d

If 1.49 grams of NO react, how many grams of NO2 form?

Consider the following balanced reaction.2H+ (aq) + 2NO3- (aq) + NO (g)  3NO2 (g) + H2O (l)

6d

Consider the following balanced chemical equation: 2K3PO4 (aq) + 3MgBr2 (aq) ----> Mg3(PO4)2 (s) + 6KBr (aq)

A 97.17 mL sample of 1.4 M K3PO4 is mixed with 45.24 mL of 0.615 M MgBr2. After reaction, what is the concentration of the excess reactant (in M)?

8d

Hydrogen chloride gas and oxygen react to form water vapor and chlorine gas. What volume of water would be produced by this reaction if 7.7 cm^3 of hydrogen chloride were consumed?

Answer has a unit symbol, and is rounded to the correct number of significant digits.

11d

Using the provided table, determine the enthalpy for the reaction 2 NH₃ (g) + 3 N₂O (g)→ 4 N₂ (g) + 3 H₂O (l)

Substance ∆Hf° (kJ/mol)NH3 (g) -46.2N2O (g) 81.6N2 (g) 0H2O (l) -285.8

17d

The container tells us that con H2SO4 (aq) is 96.0% by mass H2SO4 and has a density of 1.84 g/mL. In carrying out the calculation, assume you are starting with 1.00 L of con H2SO4 (aq).

a) What is the mass of 1.00 L of con H2SO4 (aq)?b) How many grams of H2SO4 are in this 1.00 L of solution? How many moles of H2SO4 is this? c) Calculate the morality of this con H2SO4 solution.d)... more

17d

In two steps, calculate the concentration of a dilute solution made by diluting 6.50 mL of a 7.30 x 10^-5 M stock solution of yellow dye #6 to a volume of 25.00 mL.

a) Calculate the number of moles of yellow dye #6 in 6.50 mL of the stock solution.b) Calculate the concentration of the diluted solution.
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