Describe the characteristics that identify a sample of matter as being a substance.

1 answer:

6 0

No matter how big or little a material is, its properties remain the same. Size, form, color, and mass are the qualities that distinguish a material from non-substances. All of these qualities, including size, shape, color, and mass, can be seen and measured. Some characteristics are physical, while others are chemical. Physical characteristics include mass, volume, density, and color. Viscosity and solubility are examples of chemical qualities.

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How many moles of CO2 are produced when 3.3 moles of C2H2 react

xxTIMURxx [149]

To solve this exercise you need to know that to create CO₂ with C₂H₂ is necessary to have oxygen. So, the following balanced equation represents the reaction:
2C₂H₂(g) + 5O₂(g) → 4CO₂(g) + 2H₂O(g)

Notice that 2 moles of C₂H₂ form 4 moles of CO₂, so if 3.3 moles of C₂H₂ react, how many moles of CO2 would be produced?
2 moles of C₂H₂ -------4 moles of CO₂
3.3 moles of C₂H₂--------x moles of CO₂
x=6.6 moles of CO₂ produced.

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3 years ago

Which statement describes a chemical property that many elements might share?

nata0808 [166]

ANSWER:

I think its B.

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10. Air is a homogenous mixture of gases. Oxygen is 20% by volume of air typically. What

raketka [301]

Answer:

893 moles