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3 years ago

Activity 7: Crossword Puzzle

Chemistry

1 answer:

Ivenika [448]3 years ago

4 0

Answer:

Across

2. Conduction.

3. Plates

4. Convection

5. Subduction

7. Earthquake

Down

1. Radioactive

6. Radiation

8. Sink

9. Slabpull

The clues are;

Across:

2. air molecules come in contact with warmer molecules

3. crust are made up of puzzle - like landmass called_____

4. rising and falling movement of material in the mantle

5. when tectonic plates push with each other

7. it is the result of movement of earth's plate

Down:

1. elements that play a vital role in Earth's internal heat

6. least important mode of heat transport

8. warm material rise; cool material______

9. heats build up underneath the crust

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A wave with a short wavelength passes a certain point more times per second than another wave with a longer wavelength. The wave

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Answer: Lower frequency

Explanation:

Frequency is the space in between two parts of a wave

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3 years ago

Which of the following best describes the particles that make up lightning and the particles that make up the water in a bottle?

Blizzard [7]

Answer:

Those in lightning are charged and those in water are not charged.

Explanation:

The particles in lightning differs from those in a water in that water molecules are neutral and those of lightning are charged.

Lightning is made up of charged ions or particles that have either lost or gained electrons.

Lightning is produced as a burst or discharge of charged particles that are imbalanced withing the clouds.

Water molecules are made up of hydrogen and oxygen atoms which forms molecules held together by strong intermolecular and interatomic bonds.

Due to the sharing of electrons that has made this bonding possible, there is a net charge balance which leads to a neutrality.

Water is electrostatically neutral and not charged.

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3 years ago

Read 2 more answers

Which of the following is an exothermic reaction?

agasfer [191]

The answer is <span>B) an explosion

An </span>exothermic reaction is a chemical reaction that is caused by heat and light.

Have a good day! =)

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4 years ago

What mass of chromium would be produced from the reaction of 57.0 g of potassium with 199 g of chromium(II) bromide according to

fredd [130]

Answer:

Mass of Chromium produced = 37.91 grams

Explanation:

2K + CrBr₂ → 2KBr + Cr

2mole 1 mole 1 mole

mass of Potassium = 57.0 grams

molar mass of Potassium = 39.1 g/mol

no of moles of Potassium = 57.0 / 39.1 = 1.458 moles

mass of CrBr₂= 199 grams

molar mass of CrBr₂ = 211.8 gram/mole

no of moles of CrBr₂ = 199 / 211.8 = 0.939 mole

From chemical equation

1 mole of CrBr₂ = 2 moles of K

∴ 0.939 moles of CrBr₂ = ?

⇒ 0.939 x 2/1 = 1.878 moles of K

1.878 moles of K is needed, but there is 1.458 moles of K. So, Potassium is completed first during the reaction . Hence, Potassium is limiting reagent. and CrBr₂ is excess reagent .

From chemical equation

2 moles of K = 1 mole of Cr

∴ 1.458 moles of K = ?

⇒ 1.458 x 1/ 2 = 0.729 moles of Cr

no of moles of Cr formed = 0.729 moles

molar mass of Cr = 52.0 g/mol

mass of one mole of Cr = 52.0 grams

mass of 0.729 moles of Cr = 52.0 x 0.729 = 37.908 grams

mass of Chromium produced = 37.91 grams

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3 years ago

CCC Structure and Function Why is the arrangement of the constituent atoms or

ozzi

Since the atoms or molecules in a solid do not translate hence, the structures of solids usually described in terms of the positions of the constituent atoms rather than their motion.

<h3>States of matter</h3>

There are three state of matter which are;

Solid
Liquid
Gas

In a solid, atoms or molecules retain their positions and do not translate, hence, the structure of atoms or molecules are most important in determining the structure of a solid.

Also, the fact that the atoms or molecules in a solid can only vibrate or rotate explains why the structures of solids usually described in terms of the positions of the constituent atoms rather than their motion.

Learn more about the states of matter: brainly.com/question/9402776

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3 years ago