CHEMISTRY MIDDLE SCHOOL

Why is water considered a renewable resource?

Answers

Answer 1
Answer:

Answer:

Water is a renewable resource because it evaporates out of the oceans to clouds, which generate rain falling on the land. The water then runs into rivers and dams where it is used and the waste is partially cleaned before it makes its route to the sea, where the cycle begins again.
Answer 2
Answer:

Sample Response: Sunlight is always available in nature for us to use and it cannot be used up.

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1) What is the mass of 5.24 moles of Fe504-7H2O?

Answers

Answer:

Ok; first of all, you must correct the Molecular Formula; FeSO4•7H20

So, work out the Molar Mass;,

(4x18)O+ 55.? Iron + 32 Sulphur, PLUS

(7x 18) H2O = 1 molar mass.

Now, take that times 5.24, show your work & check the Mol. Weights, I am going by memory.

Oxygen

Explanation:

How is Earth like a magnet

Answers

Earth's magnetic field is mostly caused by electric currents in the liquid outer core, which is composed of conductive, molten iron. Loops of currents in the constantly moving, liquid iron create magnetic fields. From afar, the Earth looks like a big magnet with a north and south pole like any other magnet.
Earth's magnetic field is mostly caused by electric currents in the liquid outer core, which is composed of conductive, molten iron. Loops of currents in the constantly moving, liquid iron create magnetic fields. From afar, the Earth looks like a big magnet with a north and south pole like any other magnet.

An ionic compound is formed when there is a reaction between the elementsa) strontium and chlorine
b)hydrogen and chlorine
c)nitrogen and oxygen
d)sulfur and oxygen

Answers

Ionic compounds are formed between a metal and non-metal. An ionic compound can be formed between strontium and chlorine and the compound is called strontium chloride.

What is ionic compound?

Ionic compounds are formed by losing an electron from an electropositive element to an electronegative element. Thus between a metal and non-metal.

Ionic bonds are the strongest bond and it creates partial charges in the compound since the bonded electrons are attractively pulled towards the more electronegative element in the bond and thus the metal ions gets a positive charge and nonmetal gets a negative charge.

Covalent bonds are formed by sharing electrons between two nonmetals. Hydrogen and chlorine forms the covalent compound HCl. Similarly, nitrogen and oxygen always forms covalent bonds.

Sulfur and oxygen are comparable in electronegativities and thus forms a covalent bond. Therefore, the elements which forms an ionic compound are strontium and chlorine forming strontium chloride. Hence, option A is correct.

To find more about ionic compounds, refer the link below:

brainly.com/question/17217225

#SPJ5

Answer:

strontium and chlorine

Explanation:

From which layer of the atmosphere do particles of air escape into space?

will give brainly

Answers

Answer: The layer from where particles of air escape into space is exosphere.

Explanation:

The atmosphere is divided into layers. There are 5 main layers of atmosphere, which are: Troposphere, Stratosphere, Mesosphere, Thermosphere and Exosphere.

  1. Troposphere is the lowest layer of the atmosphere where most of the weather occurs.
  2. Then comes the Stratosphere which is about 50 km above the Earth's surface. It contains most of the ozone which is present in the atmosphere.
  3. Then comes the Mesosphere which starts from 50 km and extends upto 85 km from the Earth's surface.
  4. Then comes the Thermosphere which starts from 90 km and extends to between 500 km and 1,000 km.
  5. Exosphere is the last layer of the atmosphere, through which anything escapes the atmosphere to space. This layer extends upto 10,000 km from the Earth's surface.

Hence, the layer from where particles of air escape into space is exosphere.

Answer:

Exosphere

Explanation:

I took the k12 test.

What is the molecular mass of HCI

Answers

Answer:

36.46 g/mol

pls mark brainlest

What is the color of the indicator thymol blue in a solution that has a pH of 11?(1) red (3) pink

(2) blue (4) yellow

Answers

Answer is (2) - blue.


Thymol blue is a pH indicator which 3 colors according to the pH.


Thymol blue shows red color at below pH than 1.2 and shows yellow color at the pH between 2.8 and 8.0. For the pH above 9.6, thymol blue shows blue color.


Hence, the thymol blue has 2 pH ranges as 1.2 - 2.8 and 8.0 - 9.6.


Since, pH = 11 is above the pH = 9.6, thymol blue shows blue color.
The answer would be blue. This is because red indicates 1-2, pink is 3, and yellow is 6.
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