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A chemical compound requires 8 ounces of Chemical A and 12 ounces of Chemical B. A mixture contains 24 ounces of Chemical A and 30 ounces of Chemical B. How can you fix the mixture to make the chemical compound?
Since 8x3=24 and since 12x3=36 you need to add 6oz of chemical B to have 24oz of chemical A and 36oz of chemical B. Take 1/3 of the total mixture...
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Are there changes in the physical and chemical properties of a substance when it undergoes a physical change? Is the same true for chemical changes?
...i.e.. solid to liquid, liquid to gas...and vice versa. And certainly, , mass per unit volume, changes markedly upon a phase change between a condensed phase, solid or liquid, and...
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Which of these changes involved a physical change and not a chemical change?
Chemical change is characterized by the making and breaking of strong chemical bonds, and the formation of new substances. Clearly, during the fermentation, sugars reacted chemically to give carbon dioxide...
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State the difference between a physical change and a chemical change, and list three indications that a chemical change has occurred. Which indication is most suggestive of a chemical reaction?
Physical changes are changes in the formation or state of molecules and atoms. The arrangement of the molecules and atoms is different after the change but the chemical composition of...
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Ammonium chloride and sodium oxide are mixed in a boiling tube and then heated.
Write balanced equation based on the chemical reaction described. State the chemical test if necessary?
$2NH_4Cl + Na_2O(s) rarr 2NaCl(s)+2NH_3(g)uarr +H_2O(l)$ This is simply an acid base reaction.......i.e. $O^(2-) + 2H^+ rarr H_2O(l)$ Ammonium is the carrier for the acidium ion, $H^+$..... And the...
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What is a balanced chemical equation, including physical state symbols, for the combustion of gaseous ethane into gaseous carbon dioxide and gaseous water?
So two questions: is mass balanced?; is charge balanced? If you like you can double the equation to eliminate the half-integral coefficient; the mass transfer, the is still the same....
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A chemical reaction is a process that changes some chemical substances into others. What is involved in the process of forming these new chemical substances?
Chemical change is characterized by the formation of new substances, and the making and breaking of strong chemical bonds. Usually this is signalled by a colour change, though some few...
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Is a change of the state (or phase) of matter a physical or chemical change?
A phase change does not involve changing the identity or makeup of that species. When you take solid ice and melt it (add enough energy to it) it changes to...
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Calculate the change in enthalpy $( DeltaH)$ for the chemical reaction modeled by this chemical equation: $H_2 + Cl_2 rarr 2HCl$
Is energy entering or leaving the system? How do you know? What happens to the covalent bonds during this reaction?
And I don't know offhand how they measured the enthalpy change for the reaction, $H_2(g)+Cl_2(g)rarr2HCl(g)+Delta$ but such a measurement could conceivably be done and no doubt has been done....
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How does isomeric butane differ in physical properties?
So we take the formula $C_4H_10$.......there are two ways which the carbon chain may be connected...... $"H"_3"CCH"_2"CH"_2"CH"_3$ $"n-butane"$, whose normal boiling point is $-1$ $""^@C$. $"H"_3"C(CH"_3")CH"_2"CH"_3$ $"isobutane"$, whose normal boiling...
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