4. RAČUN Flashcards

1
Q

Mjerna jedinica za množinu tvari? [n]

A

mol

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2
Q

Mjerna jedinica za molarnu masu? [M]

A

g/mol

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3
Q

Avogardova konstanta i drugi naziv za nju?

A

6,022x10^23, Loschmidtov broj

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4
Q

Koliko iznosi standardni molarni volumen plina?

A

22, 4 dm^3/mol

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5
Q

Što je unificirana atomska jedinica mase? [u]

A

1/12 mase atoma izotopa ugljika 12C, iznosi 1,6605x10-24g

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6
Q

Kako se izračunava relativna atomska masa?

A

Ar(X)= ma(X)/u

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7
Q

Kako se izračunava relativna molekulska masa?

A

Mr(XY)=Ar(X)+Ar(Y)

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8
Q

Kako se izračunava masa formulske jedinke ili molekule?

A

mf(XY)=Mr(XY)xu

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9
Q

Što je molarna masa? [M]

A

Isto što i Mr ili Ar samo sa mjernom jedinicom g/mol.

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10
Q

Što je mol?

A

Količina uzorka koji sadrži onoliko jedinki koliko ima atoma u 0,012kg ugljika C12.

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11
Q

Koji su standardni uvjeti?

A

t=0°C, p=101 325 Pa

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12
Q

Kako se računa maseni udio?

A

w(A,AxB)= x x Ar(A)/Mr(AxB)

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13
Q

Što je empirijska formula?

A

Najmanji omjer broja atoma ili iona u nekom spoju.

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14
Q

U kojim su spojevima empirijska i molekulska formula jednake?

A

H20, NH3, CH4

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15
Q

Kako se zove zakon o očuvanju mase?

A

Lavoisierov zakon

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16
Q

Što je mjerodavni reaktant?

A

Onaj koji proizvodi najmanju količinu produkta i potpuno se troši u reakciji.