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4 years ago

Mg metal is placed in HCl and a gas is liberated. This is an example of a

Chemistry

1 answer:

Dafna1 [17]4 years ago

8 0

Answer:

The answer to your question is: b) Chemical property

Explanation:

Physical property: is when matter changes is physical state but it does not change its composition. For example, evaporation, condensation, sublimation, solidification, etc.

Chemical property, is when matter changes its composition because the reactants forms products.

In this question we have:

Mg + HCl ⇒ MgCl₂ + H₂↑

In this reaction, there are Mg and HCl, and after the reaction MgCl₂ and H₂ so, there was a change, and this reaction is a chemical change.

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Which neutral element has the following electron configuration? 1 s^2 2s^2 2 p^6 3 s^2 3 p^41s 2 2s 2 2p 6 3s 2

Orlov [11]

Sulfur, written as S.

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3 years ago

If you have 1.4 grams of silver (Ag), how many moles of silver do you have?

creativ13 [48]

Answer: There are 0.0129 moles of silver present in 1.4 grams of silver (Ag).

Explanation:

Given: Mass of silver = 1.4 g

Number of moles is the mass of substance divided by its molar mass.

As molar mass of silver is 107.86 g/mol. Therefore, moles of silver are calculated as follows.

$No. of moles = \frac{mass}{molar mass}\\= \frac{1.4 g}{107.86 g/mol}\\= 0.0129 mol$

Thus, we can conclude that there are 0.0129 moles of silver present in 1.4 grams of silver (Ag).

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3 years ago

A gas is contained in a horizontal cylinder with a moveable piston of cross-sectional area 0.33\text{ m}^20.33 m 2 . The region

-BARSIC- [3]

Answer:

0.02 m

Explanation:

∆U = q + w

w = ∆U - q = (1380 - 2040) J = -660 J

w = -p∆V = -pA∆h

∆h = -w/(pA)

p = 1 bar × (100000 Pa/1 bar) = 100000 Pa

∆h = -(-660 J)/(100000 Pa×0.33 m²) = 0.02 m

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3 years ago

Im Stuck on this question for My Science homework

yarga [219]

Answer:

it's not clear

Explanation:

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3 years ago

Which layer of the sun is responsible for producing the light shown in the picture above? Radiative zone Convective zone Photosp

victus00 [196]

Answer:

Answer Expert Verified

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3 years ago

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