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givi [52]
4 years ago
9

Pure sodium metal explodes when it makes contact with water, and chlorine, in its natural state, is a deadly, poisonous gas. Whe

n these two chemicals combine, they form a harmless, white powder known as sodium chloride or table salt. Which of the following statements does this information support? A. When substances are chemically combined, the properties of the new substances that are formed are often different from the properties of the original substances. B. Heat must be added in order to change the chemical properties of substances. C. When substances are chemically combined, the properties of the new substances that are formed are the same as the properties of the original substances. D. The properties of substances change during chemical reactions but then later go back to their original condition.
Chemistry
2 answers:
denis23 [38]4 years ago
6 0

Answer:   A.  When substances are chemically combined, the properties of the new substances that are formed are often different from the properties of the original substances.

Explanation:  when sodium metal combines with chlorine gas, it forms a crystalline compound known as Sodium Chloride . Thus a new compound has been formed and it can be observed that the physical properties of the newly formed compound is entirely different from the elemental states.

Thus when 2 or more entities are combined together via the process f aby chemical change or any chemical reaction, it would lead to the formation of the new compound that would have an entirely different segment of properties than the parent elements.

sladkih [1.3K]4 years ago
3 0
The answer is A because the information is stating that when one chemical combined with another chemical, it had new properties which is essentially answer choice A
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Consumers get an idea of the building blocks of foods from ________________ and ________________.
oee [108]

Answer:

Ingredient lists and nutritional facts

Explanation:

The packaged food, a consumer purchases has all its details written on the food package which is also verified by a trusted government institution.

  • <u>Ingredient List </u>

The list tells each ingredient in food product by the food's common or usual name in the descending order by the weight.

  • <u>Nutrition Facts Label </u>

FDA requires this label on most of the packaged foods and the beverages. At top of Nutrition Facts label, there is written total number of the servings in container and serving size of food or drink. Serving size on label is based on amount of the food which people eat typically at one time. Rest of nutrition information on label is based usually on one serving of food or beverage.

7 0
3 years ago
Which statement is the best description of a chemical reaction? the decomposition of particles the combustion of a substance for
Rom4ik [11]
The combustion of a substance forming or breaking bonds mixing two substances.
3 0
3 years ago
Read 2 more answers
Which best includes elements with the most similar chemical properties?
sasho [114]
Usually, elements with more similar properties share the same column on the periodic table.
Therefore, if you look at the periodic table, you can see that Oxygen, Sulfur, and Selenium all share the same column. Therefore, they all have similar properties

Answer: #3 ( O, S, Se )

Hope this helped!!! :D
8 0
3 years ago
Which element would be the most conductive and
Masja [62]
Malleability described the property of physical deformation under some compressive stress; a malleable material could, for example, be hammered into thin sheets. Malleability is generally a property of metallic elements: The atoms of elemental metals in the solid state are held together by a sea of indistinguishable, delocalized electrons. This also partially accounts for the generally high electrical and thermal conductivity of metals.

In any case, only one of the elements listed here is a metal, and that’s copper. Moreover, the other elements (hydrogen, neon, and nitrogen) are gases under standard conditions, and so their malleability wouldn’t even be a sensible consideration.
8 0
3 years ago
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Identify each of the following energy exchanges as primarily heat or work and determine whether the sign of ΔE is positive or ne
spayn [35]

Answer:

ΔE negative,ΔE positive,ΔE positive

Explanation:

Internal energy change of a system is positive when the system acquires energy from outside and internal energy change is negative when energy is being liberated from the system.

a Sweat evaporates from skin,cooling the skin ΔE is negative as heat energy is liberated through evaporation of sweat.

b A balloon expand against an external pressure ΔE  positive because external energy is required to expand the balloon.

c An aqueous chemical reaction mixture is warmed with an external flame ΔE is positive because heat energy is provided by the external flame to warm the aqueous chemical reaction.

7 0
3 years ago
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