need a top pick for another slide to talk about crystals

Answers

Answer 1

Answer:

tigers eyes

Explanation:


Related Questions

If a boulder sits at rest on top of a mountain what conclusion can be made about the forces acting on the

Answers

A boulder sits at rest on top of a mountain. What conclusion can be made about the forces acting on the boulder? The forces acting on the boulder are balanced (net force equals zero).

If a boulder sits at rest on the top of the mountain , the forces acting on the boulder are zero as it is in the state of rest.

What is a force?

Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.

It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.

The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.

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a screwdriver has a volume of 0.418 cubic centimeters. it also has the mass of 2.3 grams. what is the screwdrivers density

Answers

Answer:

The answer is 5.50 g/cm³

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question we have

[tex]density = \frac{2.3}{0.418} \\ = 5.50239234...[/tex]

We have the final answer as

5.50 g/cm³

Hope this helps you

Answer:

Comets are cosmic snowballs of frozen gases, rock and dust that orbit the Sun. When frozen, they are the size of a small town. When a comet's orbit brings it close to the Sun.

Explanation:

can you guys help me please? I dont get what im supposed to do here.

Answers

density is equal to mass divided by volume

5. What is a hypothesis and how is it used?

Answers

Answer: a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

A hypothesis is used in an experiment to define the relationship between two variables. The purpose of a hypothesis is to find the answer to a question. A formalized hypothesis will force us to think about what results we should look for in an experiment. The first variable is called the independent variable

i hopes this helps :)

True or false igneous rocks can only turn into metamorphic

Answers

Answer:

this is false igneous rocks can turn into either sedimentary rocks and they can be metamorphic

Explanation:

i hope this helps your welcome :)

Answer:

False

Explanation:

Igneous rocks can turn into sedimentary rocks as well as metamorphic.

If a sample of copper is 215g, how many moles of copper atoms are in the sample?

Answers

Answer:

3.38 moles.

Explanation:

The following data were obtained from the question:

Mass of copper (Cu) = 215 g

Number of mole of copper (Cu) =...?

The number of mole of copper (Cu) in 215 g can be obtained as follow:

Mass of copper (Cu) = 215 g

Molar mass of copper (Cu) = 63.55 g/mol

Number of mole of copper (Cu) =...?

Mole = mass /Molar mass

Mole of Cu = 215/63.55

Mole of Cu = 3.38 moles

Therefore, 3.38 moles of copper (Cu) is present in the sample.

Urgent please help!!
Which of these is a chemical property of a substance?
A) texture
B) ductility
C) reactivity
D) conductivity

Answers

Answer:

reactivity

Explanation:

Which statement best describes how entrepreneurship affects a society's
economy?
A. It encourages people to take risks to create new products.
B. It organizes the people who help a business operate.
C. It provides the raw materials needed to produce goods.
D. It supplies businesses with the tools they need to function.

Answers

i would answer a!

entrepreneurship helps introduce new products and ideas to the economy and encourages other companies to become more competitive. answer a sounds like the most accurate :)

hope this helps!

Answer:it’s a

Explanation:cause

Which of the following is not a gas in the Earth's atmosphere? A. oxygen B. carbon dioxide C. sulfur D.nitrogen 1​

Answers

C. sulfur is not a gas in earth’s atmosphere
c hope this helped and good luck

Examples of physical change include?

A. Melting
B. Boiling
C. Freezing
D. All of these are examples of physical change

Answers

Answer:

All of these examples are physical changes.

Explanation:

Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.

19. Chemical properties can be used to
(1) differentiate between two compounds
(2) determine the temperature of a substance
(3) determine the density of a substance
(4) differentiate between two neutrons

Answers

Answer:differentiate between two compounds i think!

Explanation: taking a test!

Answer:(1) differentiate between two compounds

Explanation:

A Chemical property tells us the  characteristics of a particular matter or substance after a  chemical change. This property helps us to differentiate a compound from another or differentiate   elements or substances. Examples of a Chemical property are  acidity, reactivity and heat, etc .

For example to differentiate between Water H2O and  Hydrogen peroxide, H202

Even though they are made up of  oxygen and hydrogen. Hydrogen peroxide  (H2O2), has  more(1) oxygen than water (H2O).

Using Acidity as a chemical property to differentiate these substances

Water, H20  is amphoteric in nature ie having both acidic and basic properties, while H202 is a weak acid.

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Calculate the maximum mass of potassium sulfate, K2SO4, that could be formed when 4.9 g of sulfuric acid reacts with excess potassium hydroxide.

H2SO4 + 2KOH → K2SO4 + 2H2O

Answers

Answer:

From 4.9 g of sulfuric acid 8.175 g of potassium sulfate is formed.

Explanation:

Given data:

Mass of H₂SO₄ = 4.9 g

Mass of K₂SO₄ formed = ?

Solution:

Chemical reaction:

H₂SO₄ + 2KOH    →    K₂SO₄ + 2H₂O

Number of moles of H₂SO₄:

Number of moles = mass/ molar mass

Number of moles = 4.9 g/ 98.1 g/mol

Number of moles = 0.05 mol

Now we will compare the moles of  H₂SO₄ with  K₂SO₄ .

                       H₂SO₄         :             K₂SO₄

                            1             :                  1

                       0.05           :             0.05

Mass of K₂SO₄:

Mass = number of moles × molar mass

Mass = 0.05 mol × 174.3 g/mol

Mass = 8.715 g

Thus, from 4.9 g of sulfuric acid 8.175 g of potassium sulfate is formed.

How many molecules are in 1.35 mol of CS2

Answers

Answer:

There are  there are 8.13-10^25

Explanation:

N(CS2)= 1.35* (times) 6.02-10^ 25= 3.13-10^25 molecules

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 8.12×10²³ molecules are in 1.35 mole of CS[tex]_2[/tex].

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample. There are so many formula for calculating mole.

we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number

number of atoms/molecules=number of moles × 6.022×10²³(Avogadro number)

number of moles of CS[tex]_2[/tex] =  1.35 mol

Substituting all the given values in the above equation, we get

number of atoms/molecules= 1.35 × 6.022×10²³

number of atoms/molecules=8.12×10²³ molecules

Therefore, 8.12×10²³ molecules are in 1.35 mole of CS[tex]_2[/tex].

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Can anyone explain to me how I solve 3x10^8 / 3.82x10^-7
I know the answer due to referring to the key but I'm not sure how they got it. Answer was 7.85x10^14

Answers

Answer:

You have to do this on a calculator. So when you put it in the calculator you will get 7.85x10^14.

3x10^8 is the speed of light. 3.82x10^-7 is the number in the question.

You can solve it like this

3x10^8

------------------        

3.82x10^7                  

But you would do this on a calculator.

The rows in the periodic table are called periods.
What is true about elements in the same period?

Answers

Answer:

elements in the same period have the same number of shells

the period number the element is in, that is the number of shells it has.

who Organized elements into four groups based on propertie

Answers

The answer to this is Mendeleev

which 2 statements describe a mixture?
1. It includes atoms of different elements.
2. Its parts can be separated using physical means.
3. It can result from chemical bonding.
4. It is a pure substance.

Answers

Answer:

It's parts can be separated using physical means.It is a pure substance.

Metamorphic means “________________.”
A}to turn into rock
B]to make into minerals
C]to change form
D]to press down

Answers

C) To change form

In Greek metamorphic means 'to change form ' . Hence the answer to this question will be ;

C) To change form

43. Why is the geometric structure of a molecule
important, especially for biological molecules?

Answers

Answer:

Structure is particularly important for biological molecules because a slight change in the structure of a large bio molecules like nucleic acids, proteins, enzymes, carbohydrates and lipid molecules can completely destroy its usefulness to a cell and may even change the cell from a normal one to a cancerous one.

Answer:

A slight change can change the molecule’s usefulness to the cell.

Explanation:

please anyone help me with this ​

Answers

Answer:

matter is anything that takes up space while elements are subtanxes that can  be broken down


Which iron pot has the least thermal energy?
A. A5 kg pot at 130°C
B. A 2 kg pot at 120°C
C. A 5kg pot at 25°C
D. A 2 kg pot at 25°C

Answers

Answer: D. A 2 kg pot at 25C.

Explanation:

what is chemistry about ​

Answers

Answer:

Explanation:

Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything.

Answer:

its the science that deals with the properties, composition, and structure of substances like elements and compounds, the transformations they undergo, and the energy that is released or absorbed during these processes

anwser this ASAP please

Answers

Answer:

Its D :)

Or not i haven't done this in a while-

which element has an atom with the following composition? 24 protons, 28 neutrons and 24 electrons.

Answers

Chromium - 28

The amount of protons is equal to the atomic number and this can always be used to identify the element

hello~i will really appreciate it if you answer all this♡


1.How many valence electrons do noble gases like Ne,Ar and Kr have?

a.1.
b.2
c.6
d.7

2.The following describe ionic bonding,EXCEPT____.

a.It involves the transfer of electrons.

b.It involves sharing of electrons.

c.atoms either gain or lose electrons.

d.It is a bond between a metal and a non-metal.

3.Which of the following pairs of atoms is most likely to form a covalent compound?

a.C,O
b.Na,O
c.Mg,Br
d.Ba,CI

4.Which of the following is a metal?

a.O
b.S
c.K
d.C

5.Which is not a type of a chemical bonding?

a. Polar bonding
b.Metallic bonding
c.ionic bonding
d.covalent

||. A. Use Lewis structures to show . the transfer of electrons in the given combinations.

1.K +Br
2.Ba + I
3.Be + O
4.Na + S
5.AI + F

B.What ionic charge will the following elements have?PLEASE JUSTIFY YOUR ANSWER.

1. Group 2A
2. Group 5A
3.Group 6A

C.Predict whether the bonding in the oxides of the following elements is covalent or ionic.EXPLAIN YOUR ANSWER.

1.Aluminum
2.Magnesium
3.Phosphorus
4.silicon
5.sodium

|||. Write the electron configuration of the following elements.

1. Ti
2. V
3. Se
4. Ag
5. Zr

thank you!
to your hardwork★

Answers

Explanation:

1)Noble gases have stable valence electron of 2 and 8.

2)B- ionic compounds do not require sharing of electron.

3)B- sodium and oxygen will likely form a covalent compound.

4) C- potassium

5) A- polar bonding

6)

Which are examples of harmful mutations? Check all that apply. One that causes a person to have a light patch of hair color one that changes a mouse's eye shape but not its eyesight O one that allows a moth to blend into its environment one that reduces a bean plant's ability to make food one that increases the plants susceptibility to disease

Answers

Answer:

one that reduces a bean plant's ability to make food

one that increases the plants susceptibility to disease

Explanation:

Genetic mutation refers to the changes in the arrangement of the bases that make up a gene. This sudden change may have positive or negative consequences for the individual specie.

Some genetic mutations actually alter a gene's sequence of bases but do not alter the function of the particular protein that the gene in question makes.

The two options chosen in the answer shows situations in which a genetic mutation causes harm to the organism involved.

Answer:

2, 4, and 5

Explanation:

What do you think is the difference between an "open" system & a "closed" system?

Answers

Answer:

Hope it help you

Stayhomestaysafe

Plz mark my answer brainliest✍️✍️

Explanation:

There are three types of systems in thermodynamics: open, closed, and isolated. An open system can exchange both energy and matter with its surroundings. ... A closed system, on the other hand, can exchange only energy with its surroundings, not matter.

REAL NAME - SHRESTH DUBEY

Help fast I have a few left

Answers

Answer: A

Explanation: 0.00624 x 10^8

All you have to do is move the . 8 units left

This gives you 624000.0

6. In our modern times, the atom can be subdivided into
A.) protons and electrons, only

B.) protons and neutrons, only

C.) protons, neutrons, and electrons, only

D.) neutrons and electrons, only

Answers

Answer:

C.) protons, neutrons, and electrons, only

Explanation:

According to the modern atomic theory, we can distinguish 2 parts in an atom:

The nucleus, where is the majority of the mass of the atom, that is, protons and neutronsThe external shell, where are the electrons.

In a neutral atom, there are the same number of protons (positive charges) as electrons (negative charges).

state two advantages of parallel over series connection in table form?​

Answers

Advantages of parallel combination over series combination are:

1) In parallel combination each appliance gets the full voltage.

2) If one appliance is switched on/of others are not affected.

3) The parallel circuit divide the current through the appliances. Each appliance gets proper current depending on its resistance.

4) In a parallel combination it is very easy to connect or disconnect a new appliance without affecting the working of other appliances.

choose what you like!

Note that there are also some disadvantages to using parallel connections over series connections, such as increased complexity in wiring and the need for additional safety measures when working with high voltage circuits. The choice between series and parallel connections depends on the specific requirements of the circuit and the devices being used.

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