Chemistry

The second period contains__(how many) elements

8

Where does the energy come from in a nuclear fission reaction

A diagram in a chemistry book shows an atom of Uranium-235 being bombarded by a neutron. In the diagram this produces a U-236 atom which splits into a Barium-141 atom, a Krypton-92 atom, and three neu

Which element has greater electron affinity and why

1- Cl or Br, why? 2- O or F, why? 3- Na or Si, why? 4- K or Na, why?-1Cldown the group electro negativity decreases in 17th group with fluorine as exception 2Obecause of its small size the incomin

Which of the following situations would result in the fastest reaction between the same two reactants

a) a solution of low concentration at a high temperature b) a solution of low concentration at a low temperature b) a solution of high concentration at a high temperature d) a solution of high concent

Chemistry homework help?! Ten points best answer!

Please show your work and answer for the following. Best answer gets the ten points immediately. 1. The gas-phase decomposition of SO2Cl2 = SO2 + Cl2 is first order in SO2Cl2. At 600 K, the half-life

Chemistry equation help

Im having some trouble with this.Could you please explain it? Carbon-14, a beta emitter, forms from the bombardment of nitrogen-14 with a neutron. Write balanced nuclear equations for the formation o

What is the freezing point of 0.1% zinc chloride solution, dissociating 80%

molecular weight of zinc chloride is 136 & freezing point of molar solution of non-electrolyte is -1.86 degree Celsius.-First we calculate the number of moles of Zn Cl2 in order to have the molarity

What is the pH of a 0.1 M solution of each of the following salts

The question goes: What is the pH of a 0.1 M solution of each of the following salts?Before you begin, estimate the pH (neutral, acidic or basic). a.MgF2 b.(NH4)2SO4 c.MgCl2 d.KCH3CO2 If someone c

Could someone explain this bonding and anti-bonding concept to me really quick???10pts

If the x-axis is the direction of approach of two atoms, indicate which of the following orbital combinations will result in both bonding and antibonding orbitals: (i) s and px; (ii) pz and pz; (i

How to balance this redox equation? PLEASE HELP!!!

For the equation Ag + NO3 -  Ag + + NO(Note: This reaction takes place in an acidic solution.) Step 1: What substance is reduced? Step 2:What substance is oxidized? Step 3: What is the half reacti

Chemistry problem??????????

What would be the concentration of a solution formed when 1.00 g of NaCl are dissolved in water to make 100.0 mL of solution?-Im assuming you mean concentration in molarity, correct? first convert 1

What kind of reaction occurs when the entropy change of an endothermic reaction is negative

spontaneous reversible irreversible nonspontaneous at equilibrium 2. Which of the following represents an increase in entropy? someone arranging a deck of cards in order from aces (low) to kings (hig

Pressure question??!!!!

At 0.00°C and 1.00 atm pressure, a sample of gas occupies 30.3 mL. If the temperature is increased to 30.0°C and the entire gas sample is transferred to a 30.0 mL container, what will be the gas press

Is Fe(s) the standard state of Iron

Im checking because I need to know if in this equation, the Hf of the two reactants are equal to zero. 4Fe(s) + 3O2(g)2Fe2O3(s)-Yes.

If 1.000 kg of compound contains 124.8 grams of C, by mass, the percentage of carbon in this compound is:

a) 124.8% b) 1.248% c) 12.48% d) Insufficient information is provided to correctly calculate this answer. e) None of the above are correct.-124.8g / 1000g x 100% = 12.48%, C