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3 years ago

Science 20 Chapter 2 Quiz

Chemistry

1 answer:

vichka [17]3 years ago

3 0

Answer:

The starting reactant in a single displacement reaction is a pure element such as solid zinc metal as well as an aqueous compound. Aqueous implies that the compound is water-soluble. The reaction will result in products that include a different pure element as well as a new aqueous solution.

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Jonathan claims that since only humans can read, it must be an inherited trait, passed from human parents to their children. Is

Crank

Jonathan is not correct because it has to be a trait that is learned.

So in that case Jonathan has to say that this is not an inherited trait it is learned by most people.

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3 years ago

Breaking down earths surface

tino4ka555 [31]

☁️ Answer ☁️

Thats called weathering.

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Hope it helps.

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3 years ago

When bonds are (broken/formed) there is a positive energy change.

krek1111 [17]

Answer: Hello i am confused are you asking a question?

Explanation:

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3 years ago

Read 2 more answers

Help in chem please!!!!!!

IgorLugansk [536]

This is a one-step unit analysis problem. Since we are staying in moles, grams of our compound, and thus molar mass, is not needed.

1 mole is equal to 6.022x10²³ particles as given, so:

$1.5x10^{24} particles FeO_{2} (\frac{1mol}{6.022x10^{23}particles } )=2.49 molFeO_{2}$

<h3>Answer:</h3>

2.49 mol

Let me know if you have any questions.

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3 years ago

Under certain conditions, the substance ammonium chloride can be broken down to form ammonia and hydrogen chloride. If 29.4 gram

lina2011 [118]

Answer: 20.0 g of hydrogen chloride must simultaneously be formed

Explanation:

The balanced chemical reaction is :

$NH_4Cl\rightarrow NH_3+HCl$

According to the law of conservation of mass, mass can neither be created nor be destroyed. The mass on reactant side must be equal to the mass on product side.

Thus mass of reactants = mass of products

Given : mass of ammonium chloride = mass of reactants = 29.4 g

mass of ammonia = 9.4 g

mass of products = mass of ammonia + mass of hydrogen chloride

9.4 g +mass of hydrogen chloride = 29.4 g

mass of hydrogen chloride = 20.0 g

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3 years ago