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3 years ago

The combination of gases that surrounds and protects the earth is known as

Chemistry

2 answers:

MissTica3 years ago

8 0

Answer : Atmosphere.

Explanation : The combination of gases that surrounds and protects the earth is known as Atmosphere.

An atmosphere is defined as a layer or a set of multiple layers of gases surrounding a planet or other material body, which is held in place by the gravity of that body.

It acts as an envelope of air around the earth and protects the earth from the harmful ultraviolet rays coming from the sun. Air in the atmosphere contains high amount of nitrogen which is 78.09 percent, oxygen is 20.95 percent, argon is 0.9 percent argon, carbon dioxide is 0.04 percent there is also small amounts of other gases.

Lunna [17]3 years ago

5 0

The combination of gases that surround and protect the Earth is the ATmosphere

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Holding temperature and pressure constant, what is the most important feature in determining the phase of a given organic compou

Leni [432]

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3 years ago

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The density of aluminum is 2.70 g/cm'. If the volume of a piece of aluminum is 90.4 cm', what is

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Answer:

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Explanation:

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3 years ago

What type of reaction occurs when you combine copper (II) chloride whit sodium hydroxide?

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3 years ago

Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: Zn2+, Ni4+, F-

hram777 [196]

Ionic compounds are formed between oppositely charged ions.

A binary ionic compound is composed of ions of two different elements - one of which is a positive ion(metal), and the other is negative ion (nonmetal).

To write the empirical formula of binary ionic compound we must remember that one ion should be positive and other ion should be negative, then only the correct formula should be written. To write the empirical formula the charges of opposite ions should be criss-crossed.

First empirical formula of binary ionic compound is written between $Zn^{2+} (Positive ion)and F^{-} (Negative ion)$

First Formula would be $ZnF_{2}$

Second empirical formula is between $Zn^{2+}(Positive ion) and O^{2-}(Negative ion)$

Second Formula would be $Zn_{2}O_{2}$

Note : When the subscript are same they get cancel out, so $Zn_{2}O_{2}$ would be written as $ZnO$

Third empirical formula is between $Ni^{4+}(Positive ion) and F^{-}(Negative ion)$

Third Formula would be : $NiF_{4}$

Forth empirical formula is between $Ni^{4+}(Positive ion)and O^{2-}(negative ion)$

Forth Formula would be : $Ni_{2}O_{4}$ or $NiO_{2}$

Note- The subscript will be simplified and the formula will be written as $NiO_{2}$ .

The empirical formula of four binary ionic compounds are : $ZnF_{2}, ZnO, NiF_{4},NiO_{2}$

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3 years ago

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A jogger with a mass of 60 kg is moving at 2 m/s. What is the jogger's kinetic energy?

ziro4ka [17]

Answer:

Ke = mgv

Explanation:

(60)(9.81)(2) =1177.2 joules persecond or Watts.

1.177 kilowatts

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4 years ago