TiCl2 Ionic or Covalent bond
Is TiCl2 ionic or covalent bond?One is metal and another is nonmetal, but the difference in EN value is 1.5 (less than 1.7).So what we need to look at in order to tell this is ionic or covalent?
If a reaction causes 25.0 g of water to decrease temperature by 4.7 C at constant pressure, what is the change in enthalpy for the reaction? (The specific heat capacity of water is 4.184 J/g oC).
If a reaction causes 25.0 g of water to decrease temperature by 4.7 oC at constant pressure, what is the change in enthalpy for the reaction? (The specific heat capacity of water is 4.184 J/g oC).... more
If a reaction causes 20.0 mL of water to increase temperature by 10.0 oC at constant pressure, what would be the change in temperature if 60.0 mL of water were used instead?
If a reaction causes 20.0 mL of water to increase temperature by 10.0 oC at constant pressure, what would be the change in temperature if 60.0 mL of water were used instead? Assume change in... more
Complete the equation to show how pyridine, C5H5N , acts as a Brønsted-Lowry base in water.equation: C5H5N+H2O↽−−⇀
Complete and balance the equations according to acid and base behavior in water. Phases are optional.HNO3(aq)−→−−H2O
Barium reacts with hydrochloric acid in a similar fashion to magnesium. Write the balanced molecular equation for the reaction of barium with hydrochloric acid. Include phases.molecular equation
What is the mass in grams of NO that can be formed from 6.56 moles of NO₂ in the reaction below? 3 NO₂ (g) + H₂O (g) → 2 HNO₃ (g) + NO (g)
How many moles of nitrogen gas is produced if 3.16 moles of copper(II) oxide were reacted with excess ammonia in the following chemical reaction? 2 NH₃(g) + 3 CuO (s) → 3 Cu(s) + N₂(g) + 3 H₂O(g)
How many moles of ammonia would be required to react exactly with 0.342 moles of copper(II) oxide in the following chemical reaction? 2 NH₃(g) + 3 CuO(s) → 3 Cu(s) + N₂(g) + 3 H₂O(g)
Complete and balance the molecular equation for the reaction of aqueous iron(III) nitrate, Fe(NO3)3 , and aqueous lithium hydroxide, LiOH. Include physical states.
Complete and balance the molecular equation for the reaction of aqueous iron(III) nitrate, , and aqueous lithium hydroxide, Include physical states.molecular equation: Fe(NO3)3(aq)+LiOH(aq)⟶Enter... more
An aqueous magnesium chloride solution is made by dissolving 5.78 moles of MgCl2 in sufficient water so that the final volume of the solution is 2.30 L . Calculate the molarity of the MgCl2 ... more
A 3.0 L cylinder is heated from an initial temperature of 273 K at a pressure of 105 kPa
A 3.0 L cylinder is heated from an initial temperature of 273 K at a pressure of 105 kPa to a final temperature of Assuming the amount of gas and the volume remain the same, what is the pressure... more
finding mass when reaction has stopped
A 21.5 g sample of nickel was treated with excess silver nitrate solution to produce silver metal and nickel(II) nitrate. The reaction was stopped before all the nickel reacted, and 36.5 g of solid... more
17.85 g of Mg undergoes the following reaction, what is the %s yield if 6.76 g of magnesium nitride is produced? 3 Mg(s)+N2(g)—->Mg 3 N 2 (s)
42.7 mL of aqueous 0.255 M Pb(NO3)
42.7 mL of aqueous 0.255 M Pb(NO3)2 is mixed with 21.7 of mL of 0..415 M NaCl. The equation for the precipitate reaction is Pb(NO3)2 (aq) + 2NaCl(aq)—->PbCl 2 (s)+2 NaNO 3 (aq) The concentration... more
Enthalpy of formation
A scientist measures the standard enthalpy change for the following reaction to be -220.4 kJ :2H2O2(l)2H2O(l) + O2(g)Based on this value and the standard enthalpies of formation for the other... more
I need help with the questions
1.) Which gas—hydrogen (H2) or oxygen (O2)—diffuses faster and at what relative rate? Both gases have the same temperature and pressure. (Round the relative rate to the nearest whole number.)2.) A... more
This is a Chemistry problem I cannot figure out
A researcher is studying the effects of bleach on blue food dye, C37H34N2O9S3Na2 (792.86 g/mol). (a) Water is added to 0.200 g of the dye until the volume is 500. mL. What is the molarity of the... more
I need someone to help me on this question
I've gotten some answers but I have no idea how I got them. A chemist prepares a chemical reaction between aluminum nitrate and sodium hydroxide. The chemist uses 100.0 mL of each solution in the... more
Is the sample at constant mass? (chemical calculation)
A student working on this lab found the mass of their sample after the first heating to be 30.6057 g. The student heated the sample again for 5 minutes, cooled it, and then found the mass of the... more
What mass of octane is consumed by the reaction of 4.0 of oxygen gas?
A major component of gasoline is octane C8H18 When octane is burned in air, it chemically reacts with oxygen gas O2 to produce carbon dioxide CO2 and water H2O.What mass of octane is consumed by... more
The average distance from the sun to Earth is 150,000,000 km. If the sun burned out (or blew up), how long would it take the light from this event to reach Earth (in MINUTES)? Use the speed of... more
I have a question what creates energy cellular respiration or Photosynthesis?