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eimsori [14]
3 years ago
14

Which of these statements does not describe a carbon atom? A. Carbon is a metallic element. B. Carbon has four valence electrons

. C. Carbon has a total of six electrons. D. Carbon forms bonds with many different types of atoms.
Chemistry
2 answers:
jarptica [38.1K]3 years ago
5 0

the answer is a :)))))))))))))))))))))))))))))))))))))))))))

andrezito [222]3 years ago
3 0
A carbon atom is not a metallic element.  Its location on the periodic table indicates that it is a non metal since the further right something is on the periodic table, the less metallic that element is.

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A chemist can determine the mass of K in a sample of known mass that consists of either pure K2O or pure K2O2. From this informa
Arte-miy333 [17]

Yes , the chemist can answer if the compound in K2O or K2O2

The chemical formula and composition of both the compounds is entirely different. The compound K2O2 has an additional molecule of oxygen than K2O and hence will have have higher molecular mass.

In the compound K2O

molecular mass= 2x 39+16 =94

mass ratio of K in compound= 78/94 = 0.830

In the compound K2O2

molecular mass= 2x 39+16X2 =110

mass ratio of K in compound= 78/110 = 0.710

and hence by the required ratio while extracting K , the chemist may know if the compound is K20 or K2O2

If the ratio is anything different from 0.830 and 0.710 then the compund will be something different

#SPJ9

5 0
2 years ago
Which symbol represents an atom in the ground state with the most stable valence electron figuration
Vikki [24]
The most stable electron configuration helium has.

He
3 0
4 years ago
Classify which compounds will dissolve in water and which ones will not dissolve in water.
vredina [299]

Answer:

Dissolves in water: Acetone, 1-propanol, Methanol

Do not dissolve in water: Hexane, Decane

Explanation:

From the principle that like dissolves like,polar substances will dissolve in polar solutions, while non-polar substances will dissolve in non-polar substances.

Water is a polar solution, therefore, polar substances will dissolve in it.From the given options:

Acetone is a polar molecule, therefore, it will dissolve in water.

1-propanol is a polar molecule, therefore, it will dissolve in water.

Hexane is a non-polar molecule, therefore, it will not dissolve in water.

Methanol is a polar molecule, therefore, it will dissolve in water.

Decane is a non-polar molecule, therefore, it will not dissolve in water

6 0
3 years ago
Which example best demonstrates the relationship between temperature and pressure? bubbles forming in dough when it is heated bu
Margaret [11]
I think the correct answer from the choices listed above is the first option. The best example that demonstrates the relationship between temperature and pressure would be that <span>bubbles forming in dough when it is heated. Hope this answers the question.</span>
8 0
3 years ago
What is the enthalpy for the following reaction? overall: C + 1/2O2→CO
telo118 [61]

Answer:

ΔH°(f) = -110.5 Kj/mole (exothermic)

Explanation:

C + 1/2O₂ => CO

This is asking for the 'Standard Heat of Formation (ΔH°(f)* for carbon monoxide (CO). Values for many compounds can be found in the appendix of most college general chemistry text books. From Ebbing & Gammon, 11th edition, General Chemistry, Appendix C, page 8A.

*Standard Heat of Formation by definition is the heat gained or lost on formation of a substance (compound) from its basic elements in standard state.

The ΔH°(f) values as indicated are found in the appendix of most college chemistry texts. By choosing any compound, one can determine the standard heat of formation equation for the substance of interest. For example, consider Magnesium Carbonate; MgCO₃(s).The basic standard states of each element is found in the Appendix on Thermodynamic Properties for Substances at 25°C & 1 atm. having  ΔH°(f) values = 0.00 Kj/mole. All elements in standard state have a 0 Kj/mol. See appendix and note that under the ΔH°(f) symbol some substances have 0.00 Kj/mol values. The associated element will be in basic standard state,

Standard Heat of Formation Equation for formation of Magnesium Carbonate;

Mg°(s) + C°(gpt)* + 3/2O₂(g) => MgCO₃(s) ; ΔH°(f) = -1111.7 Kj/mole

* gpt => graphite

4 0
3 years ago
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