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kotegsom [21]
4 years ago
3

Drag each statement to the correct location on the chart. Classify the sentences based on the chemical reactions they describe.

When a clam shell (CaCO3) is heated, carbon dioxide (CO2) is given off and a white powder, calcium oxide (CaO), forms.> Nitrogen pentoxide (N2O5) is an unstable gas that changes to nitrogen dioxide (NO2) and oxygen (O2) at room temperature. Sodium (Na) reacts with chlorine (Cl) to give sodium chloride (NaCl). Zinc (Zn) metal reacts with copper sulfate (Cu2SO4) to give zinc sulfate (ZnSO4) and copper (Cu). A strip of magnesium (Mg) burns brightly in oxygen (O2) to form a white powder, magnesium oxide (MgO). On heating iron ore (Fe2O3) with carbon (C), we get iron (Fe) and carbon dioxide (CO2).
Chemistry
1 answer:
bagirrra123 [75]4 years ago
6 0

Answer:

Synthesis-

3. Sodium (Na) reacts with chlorine (Cl) to give sodium chloride (NaCl).

6. On heating iron ore (Fe2O3) with carbon (C), we get iron (Fe) and carbon dioxide (CO2).

5. A strip of magnesium (Mg) burns brightly in oxygen (O2) to form a white powder, magnesium oxide (MgO).

Decomposition -

1. When a clam shell (CaCO3) is heated,carbon dioxide (CO2) is given off and a white powder, calcium oxide (CaO), forms.

2. 'Nitrogen pentoxide (N2O5) is an unstable gas that changes to nitrogen dioxide (NO2) and oxygen (O2) at room temperature.

Replacement -

4. Zinc (Zn) metal reacts with copper sulfate (Cu2SO4) to give zinc

sulfate (ZnSO4) and copper (Cu).

Explanation:

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Answer:

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Explanation:

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7 0
3 years ago
You are performing a titration of a triprotic acid, when you spill water on your lab notebook. you can read that: pka 1 = 1.40,
eimsori [14]
According to the PH formula:
PH= Pka +㏒ [strong base/weak acid]
when we have PH at the first equivalence =3.35 and the Pka1 = 1.4
So, by substitution, we can get the value of ㏒[strong base / weak acid]
3.35 = 1.4 + ㏒[strong base/ weak acid]
∴㏒[strong base/weak acid] = 3.35-1.4 = 1.95 
to get the Pka2 we will substitute with the value of ㏒[strong base/ weak acid] and the value of PH of the second equivalence point
∴Pk2 = PH2 - ㏒[strong base/ weak acid]
          = 7.55 - 1.95 = 5.6 
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3 years ago
If the age of the middle layer of a rock sample is between 600 million years and 1 billion years, which of the following could b
Varvara68 [4.7K]

200 million year to 550 million years old

6 0
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Convert 20 cals to J
zimovet [89]

Answer: 83.68 J

Explanation:

1 cal=4.184 J

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20cals=83.68 J

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