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2 years ago

5

You have the following problems and your friend gives you suggestions .work in pairs and have true conversation .Your prounction

is not so good.

1 answer:

Mrac [35]2 years ago

4 0

Answer:

hananzojsksnslapajzbzjsia

ja

Explanation:

kakaanzm

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A change in an object's speed has a(n) _________ effect on its kinetic energy than a change in its mass = <span>A greater effect.</span>

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3 years ago

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How much work does a 60kg person do in walking up 5m of stairs

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If I’m correct 300 joules

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3 years ago

Energy can come from electricity, but it<br> can also come from water<br> false<br> true

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Mention & reasons why the ability to adapt to change is

s2008m [1.1K]

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The ability to adapt is important because :

1) It helps in the survival of human beings.

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4) It brings transformation in the adapting kind.

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3 years ago

In Lesson 20, a magnesium strip was used to ignite the thermite reaction. When magnesium is placed in a flame from a small blow

nadezda [96]

Answer:

2 electrons will be needed by unbound oxygen in order to fill its 2nd shell.

Explanation:

The chemical reaction between magnesium and oxygen gives magnesium oxide as a product.The reaction is chemically represented as:

$2Mg(s)+O_2(g)\rightarrow 2MgO(s)$

Magnesium is a metal of group-2 with 2 valence electrons.It has atomic number of 12.

$[Mg]=1s^22s^22p^63s^2$

In order to attain noble gas configuration it will loose two electrons.

$[Mg]^{2+}=1s^22s^22p^6$

$Mg\rightarrow Mg^{2+}+2e^-$ ...[1]

Oxygen is a non metal of group-16 with 6 valence electrons..It has atomic number of 8.

$[O]=1s^22s^22p^4$

In order to attain noble gas configuration it will gain two electrons.

$[O]^{2-}=1s^22s^22p^6$

$O+2e^-\rightarrow O^{2-}$ ..[2]

2 electrons will be needed by unbound oxygen in order to fill its 2nd shell.

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3 years ago