What observations give evidence that a chemical reaction has happened

The chemical equation below shows the formation of ammonia from nitrogen and hydrogen gases. N2 + H2 NH3 However, the equation shown is not balanced. Which of the following particle …

Enthalpy change for the reaction 4h gives 2h2

Asked by admin @ 29/08/2021 in Science viewed by 288 persons

Enthalpy change for the reaction, 4H(g)→2H2(g) is –869.6kJ The dissociation energy of H – H bond is

Give an example of a double displacement reaction

Asked by admin @ 26/08/2021 in Chemistry viewed by 318 persons

List 10 examples of double displacement reaction

What is exothermic and endothermic reaction give example

Asked by admin @ 24/08/2021 in Chemistry viewed by 375 persons

Define define exothermic and endothermic reaction give one example each of the chemical equation

Rusting of iron is a chemical change give reason

Asked by admin @ 17/08/2021 in Chemistry viewed by 325 persons

Why is rusting of iron considered a chemical change

Burning of paper is a chemical change give reason

Asked by admin @ 17/08/2021 in Science viewed by 300 persons

Burning of paper is a chemical change. Give reason

Advanced technology gives us conclusive evidence of past events

Asked by admin @ 17/08/2021 in English viewed by 314 persons

describe how advanced technology gives us conclusive evidence of past events. long ans from ch discovering tut the saga continues

Give an example of combination reaction which is exothermic

Asked by admin @ 13/08/2021 in Science viewed by 335 persons

Give one example of combination reaction which is also exothermic

Direct combination reaction of sulphur dioxide with water gives

Asked by admin @ 13/08/2021 in Chemistry viewed by 332 persons

Direct combination reaction of Sulphur dioxide with water gives

Alkene gives which of the following reaction

Asked by admin @ 10/08/2021 in Physics viewed by 354 persons

23. Alkene gives which of the following reactions ? (A) Addition reaction(B) Substitution reaction(C) Both (A) and (B)(D) None of these

What happens chemically when quicklime is added to water

Asked by admin @ 10/08/2021 in Chemistry viewed by 314 persons

What happens chemically when quick lime is added to water filled in a bucket

Discuss sn2 mechanism of methyl bromide using aqueous koh

Asked by admin @ 17/08/2021 in Chemistry viewed by 2194 persons

Comparing lactose percentage between whole milk and powdered milk

Asked by admin @ 23/08/2021 in Chemistry viewed by 1932 persons

Lewl letpa

Asked by maham237 @ 12/01/2021 in Chemistry viewed by 1570 persons

50 examples of unbalanced chemical equations with answers

Asked by admin @ 29/08/2021 in Chemistry viewed by 1399 persons

Chromium metal is immersed in an aqueous solution of cobalt(ii) chloride.

Asked by maham237 @ 23/12/2020 in Chemistry viewed by 1327 persons

Prepare a chart giving detailed information of carbon compounds

Asked by admin @ 23/08/2021 in Chemistry viewed by 1290 persons

Which 1 mole sample has the least entropy

Asked by maham237 @ 14/01/2021 in Chemistry viewed by 1275 persons

If you are given the assignment to cut raw poultry

Asked by maham237 @ 01/12/2020 in Chemistry viewed by 1256 persons

Effect of succinic acid on cst of phenol water system

Asked by admin @ 05/08/2021 in Chemistry viewed by 1255 persons

The reaction between aluminium powder and anhydrous barium nitrate

Asked by maham237 @ 09/01/2021 in Chemistry viewed by 1229 persons

Cnh4 lewis structure

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2 3 dihydroxypropanal

Asked by maham237 @ 05/01/2021 in Chemistry viewed by 1052 persons

Select true statements about the pentose phosphate pathway

Asked by maham237 @ 20/02/2021 in Chemistry viewed by 1042 persons

Crossword puzzle on carbon and its compounds class 10

Asked by admin @ 23/08/2021 in Chemistry viewed by 1013 persons

Ionic bond calculator

Asked by maham237 @ 23/02/2021 in Chemistry viewed by 991 persons