Unfortunately, I'm not doing so well on this chemistry stuff…. Write a molecular equation for the precipitation reaction that occurs (if any) when the following solutions are mixed. If no reaction occurs, write NOREACTION. 1. sodium nitrate and lead (II) acetate Express your answer as a chemical equation. Identify all of the phases in your …

# Category «Science & Mathematics»

## Determine the oxidation state of P in PO3 3-?

The oxidation state of O is -2. Let the oxidation state of P be x. The net charge on the ion is -3. The algebraic sum of the oxidation states of P and O should result in the overall charge on the given species. Thus, x + 3(-2) = -3 x – 6 = -3 …

## What is colloquial divide in math?

Colloquial means: use for ordinary conversation. By this definition, I imagine that someone is meaning: The ordinary division. However, I could be wrong. I don't understand what your question. Are you looking for an informal word that means "divide"? How about "goes into"? 12 divided by 4 = How many times does 4 go into …

## How many permutation of the letters ABCDEFGH contain a.)the string ED?

a: You've got 7 things to arrange: A, B, C, ED, F, G, and H. So 7!. b: Similarly, you've got 6 things to arrange, so 6!. c: Now you've got 5 things to arrange, so 5!. d: Again, 5 things to arrange: 5!. e: This time you've got only 4 things to arrange, because …

## Standard enthalpy of formation?

Hi firefighter, I am french (Boulogne sur mer 62200 – FRANCE) . 2 x (. . F2 (g) + H2 (g) —> 2HF (g) . . . . . . . . . . . . . . . .ΔH°rxn = – 546.6 kJ . . . . . . . . . . . …

## Consider the following reaction at 298 K: C(graphite) + 2H2(g)—> CH4(g) Delta ∆ H = -74..6 kJ?

Calculate the ΔS for the system: Sum of entropy of products – sum of entropy of reactants 186.3 – [2(130.7) + 5.7 ] 186.3 – [ 261.4 + 5.7 ] 186.3 – 267.1 = -80.8 Joules/K Entropy change of surroundings: Since the reaction evolves heat, the entropy change of the surrounding is a positive value. …

## Balanced Equation of aqueous nitric acid and aqueous ammonia react?

Ammonia And Nitric Acid Nitric Acid And Ammonia (1) Balanced equation: HNO3<aq> + NH3<aq>==> NH4NO3<aq> . (2)Ionic: H^+ + NO3^- + N^3- + 3H^+ => NH4^+ + NO3^- .Take care These are the answers you have been looking for: E: Balanced Chemical Equation: HNO3(aq)+NH3(aq)→NH4NO3(aq) F: (Net) Ionic Equation: H+(aq)+NH3(aq)→NH4+(aq) This Site Might Help You. RE: …

## Help with naming in chemistry?

The correct answer for PbO is lead(II) oxide. You have to name with roman numerals how many ion charges. combining chromium (1) and perchlorate together chemical formula 'iso'means 'Isomer' of the substance. Its a branch off a main chain such as an 'OH' group as in , Iso-propyl alcohol for example is i-C3H8O. This is …

## 7 is to 34 as 5 is to ?

32 23 or 32 24 32 29 24.285 divide 34 by 7 then multiply by 5 to get the answer! This is a ratio, right? 24? 7 is to 34 as 5 is to 23. (3+4=7 so 2+3=5). The numbers must be sequential 7:34=5:y 7y=34×5 y=42.5 y=170/7 23 plus 0 and a tree yo 24 …

## Calculate the frequency of the following wave length of electromagnetic radiation.?

6.15 x 1014 s¯1 you dont really need that equation because the equation you were using is to calculate energy in joules. The equation you should use is c = ( wavelength x frequency) (3.0 x 10^ 8 m/s) = ( 337.1) ( frequency) —->> divide most side by 337.1 8.9 x 10^5 Hz or …