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Lostsunrise [7]
3 years ago
15

Can someone help me ????

Chemistry
2 answers:
agasfer [191]3 years ago
7 0

Answer:

\boxed {\boxed {\sf Cobalt, Iron, and \  Copper}}

Explanation:

The Stock System states that In a chemical formula or equation, some metals need a roman numeral after their symbol. If a metal has <u>multiple oxidation states</u>, it needs a roman numeral.

Use the Periodic Table to see the oxidation states for each metal.

  • Cobalt (Co): +3, +2
  • Lithium (Li): +1
  • Barium (Ba): +2
  • Iron (Fe): +3, +2
  • Copper (Cu): +2, +1
  • Potassium (K): +1

We can see that <u>cobalt, iron, and copper</u> have more than one oxidation state, so they would require a roman numeral.

Alexandra [31]3 years ago
4 0

Answer:

B) Lithium

C) Barium

F) Potassium

Explanation:

All of the above are Inorganic Compounds.

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Qué es la hidrólisis​
gregori [183]

Answer:

Explanation:    es una reacción química entre una molécula de agua y otra macromolécula, en la cual la molécula de agua se divide y rompe uno o más enlaces químicos y sus átomos pasan a formar unión de otra especie química.

8 0
3 years ago
Read 2 more answers
Which reactions are single displacement reactions? 2NaBr + CaF2 → 2NaF + CaBr2 SnO2 + 2H2 → Sn + 2H2O 4Na + O2 → 2Na2O 2KClO3 →
r-ruslan [8.4K]

Answer : The correct options are, SnO_2+2H_2\rightarrow Sn+2H_2O and 2Al+6HCl\rightarrow 2AlCl_3+3H_2

Explanation :

Single displacement reaction : It is a type of chemical reaction in which the more reactive element displaces the less reactive element.

Option A reaction : 2NaBr+CaF_2\rightarrow 2NaF+CaBr_2

It is an example of double displacement reaction because in this reaction a positive cation and a negative anion of the two reactants exchange their places to form two new products.

Option B reaction : SnO_2+2H_2\rightarrow Sn+2H_2O

It is an example of single displacement reaction.

Option C reaction : 4Na+O_2\rightarrow 2Na_2O

It is an example of combination reaction because in this reaction two reactants react to give a single product.

Option D reaction : 2KClO_3\rightarrow 2KCl+3O_2

It is an example of decomposition reaction because in this reaction a single reactant decomposes into two or more products.

Option E reaction : 2Al+6HCl\rightarrow 2AlCl_3+3H_2

It is an example of single displacement reaction because in this reaction the most react element, aluminium displaces the less reactive element, hydrogen.

Hence, the options B and E are single displacement reactions.

5 0
3 years ago
Which substance has a high melting point and conducts electricity in the liquid phase
ELEN [110]
It is true that substances that have a high melting point and conduct electricity in the liquid phase are ionic substances, and if one of your options is NaCl, then that is the correct answer.
8 0
3 years ago
Read 2 more answers
When placed in a freezer , liquid water turns into ice . What best describes this change ?
GREYUIT [131]

Answer:

Freezing

Explanation:

liquid changing to a solid = Freezing

4 0
3 years ago
Read 2 more answers
Show calculations for determining the mass of sugar in an 8 oz sample of soft drinks.​
poizon [28]

Answer:

m_{sugar}=23.7g\ sugar

Explanation:

Hello,

In this case, we can first compute the volume of the sample in mL from the ounces:

8oz*\frac{29.5735mL}{1oz} =236.6mL

Thus, with the volume of the sample, we can compute the amount of sugar given the 10 g of sugar per 100 mL of soft drink as shown below:

m_{sugar}=236.6mL*\frac{10g\ sugar}{100mL}\\ \\m_{sugar}=23.7g\ sugar

Best regards.

7 0
3 years ago
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