11/15/20

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?

11/15/20

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

11/15/20

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

11/15/20

chemistry question

Complete the equation to show how pyridine, C5H5N , acts as a Brønsted-Lowry base in water.equation: C5H5N+H2O↽−−⇀

11/15/20

chemistry question

Complete and balance the equations according to acid and base behavior in water. Phases are optional.HNO3(aq)−→−−H2O

11/15/20

molecular equation

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

11/14/20

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

11/14/20

chemistry question

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

11/14/20

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

11/13/20

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

11/10/20

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

11/10/20

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

11/06/20

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

11/06/20

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

11/06/20

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

10/01/20

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

09/28/20

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

09/28/20

Dimensional Analysis

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

12/16/19

Science Homework

I have a question what creates energy cellular respiration or Photosynthesis?

12/16/19

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