Which of the following changes are classified as physical changes?

-dissolving sugar in hot tea
-petrifying wood
-cutting an apple into smaller pieces
-carving wood
-Oburning wood

Answers

Answer 1
A i think............................

Related Questions

How does Earth's rotation affect ocean currents?

Lesson 2.09

Question 9 options:

It causes them to flow in a curved path


It has no affect


It causes them to flow from east to west


It causes them to flow from north to south

Answers

Answer:

Our planet's rotation produces a force on all bodies moving relative to theEarth. ... The force, called the "Coriolis effect," causes the direction of winds and ocean currents to be deflected.

Explanation:

Earth's rotation affect ocean currents because: A. It causes them to flow in a curved path.

What is Earth rotation?

Earth rotation can be defined as the amount of time that is taken by planet Earth to complete its spinning movement about an orbital axis.

This ultimately implies that, Earth rotation refers to the time taken by earth to rotate once on its axis. Also, a spinning movement of the Earth on its axis takes approximately 24 hours to complete with respect to the Sun and it result in an effect called Coriolis.

In conclusion, Earth's rotation affect ocean currents because it causes them to flow in a curved path due to Coriolis effect.

Read more on Coriolis effect here: https://brainly.com/question/22699603

What is the role of an electron in an atom?
Electrons live inside the nucleus and carry a neutral charge.
Electrons circle the nucleus and have a positive charge.
O Electrons determine the reactivity of an atom.
Electrons act like a glue to hold the nucleus together

Answers

Answer

Electrons live inside the nucleus and carry a neutral charge.

Explanation:

if I have a +2 oxidation number do I give up or accept electrons?​

Answers

Answer:

I will give up the electrons

Explanation:

Consider the following rules:

1. An atom loses electrons if its oxidation number is positive.

2. An atom gains electrons if its oxidation number is negative.

3. An atom neither gains nor loses electrons if its atomic number is zero.

As I have an oxidation number [tex]+2[/tex] that is oxidation number is positive, so, I will give up electrons.

1) how can you make a solution more concentrated

Answers

Explanation:

solvent bc when you remove it it becomes more concentrate

When iron (iii) oxide, Fe2O3, and aluminum are heated together at a high temperature, iron (Fe) and aluminum oxide (Al2O3) is formed
1.What is the meaning of the symbol (iii) in iron (iii) oxide?

2.Write a balanced equation for this reaction

Answers

The three percenters, also styled 3 percenters, 3%ers and III%ers are American and Canadian far-right anti-government.


Temperatures in the upper atmosphere (thermosphere) reach 1500°C (2700°F), yet it does not produce
enough heat to burn you. Why?

Answers

if im not mistaken its because the ozone layer

It’s bc of the ozone layer

explain why temperature is not as hot during the summer when a city is on a body of water (for example San Diego vs. Imperial Valley).

Answers

Answer:

because the water brings a cool breeze when the wind blows

Explanation:

How many grams of silver are present in 15.0 g of silver sulfate?

Answers

Answer:

4676.985 .  grams of silver present in 15.0g of silver sulfate              

2 points
2.7 x 10-2 grams of Pb(C2H302)4 are dissolved to make 3.5 mL of
solution. What is the molarity?
Your Answer

Answers

Answer:

The molarity is 0.0174 [tex]\frac{moles}{liter}[/tex]

Explanation:

Molarity (M) or Molar Concentration is the number of moles of solute that are dissolved in a certain volume.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution.

[tex]Molarity=\frac{number of moles of solute}{volume of solution}[/tex]

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

In this case, being the molar mass of compound Pb(C₂H₃O₂)₄ equal to 443.38 g / mol, then the following rule of three can be applied: if 443.38 grams are contained in 1 mol, 2.7*10⁻² grams in how many moles they are present?

[tex]amount of moles=\frac{2.7*10^{-2} grams*1 mol}{443.38 grams}[/tex]

amount of moles= 6.09*10⁻⁵ moles

Being 1,000 mL= 1 L, then 3.5 mL= 3.5*10⁻³ L

So:

[tex]Molarity=\frac{6.09*10^{-5} moles}{3.5*10^{-3} L}[/tex]

Solving:

Molarity=0.0174 [tex]\frac{moles}{liter}[/tex]

The molarity is 0.0174 [tex]\frac{moles}{liter}[/tex]

The domain level divides
organisms based on the
differences between
eukaryotes and
prokaryotes. Eukaryotes
have a nucleus in their
cells. Which BEST describes
prokaryotes?
A. Prokaryotes are nonliving things.
B. Prokaryotes do NOT have a nucleus.
C. Prokaryotes include all plant life.
D. Prokaryotes cannot reproduce.

Answers

Answer:

B. Prokaryotes do NOT have a nucleus.

How many moles are there in 3.9 grams of potassium

Answers

Answer:0.025576559594663 mole.

Explanation:

the substance that can not be further decomposed by ordinary chemical means is
A.water
B.gold
C.sugar
D.air​

Answers

It’s between c and a

What energy associated with light that allows us
to see colors on the ROYGBIV spectrum?

Answers

Answer:

Visible light waves let you see the world around you. The different frequencies of visible light are experienced by people as the colors of the rainbow.

Explanation:

Neon is used in lighting advertising displays.

Which statement can be applied to an atom of neon?

A The atom has the same electron arrangement as Cl– ion.
B The atom has two more electrons than an atom of oxygen.
C The atom has the same number of outer electrons as an atom of helium.
D The atom has the same number of electrons as a Ca2+ ion.

Answers

Answer:

B. The atom has two more electrons than an atom of oxygen.

Explanation:

In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.

Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.

Oxygen has a total number of eight (8) electrons while neon has total number of ten (10) electrons. Therefore, an atom of oxygen is able to gain (receive) two (2) more electrons in order to have the same electron arrangements as the noble gas i.e an atom of neon with an atomic number of 10.

This ultimately implies that, an [tex] O^{2-} [/tex] atom contains the same number of electrons as an atom of neon.

Hence, a neon atom has two more electrons than an atom of oxygen.

Additionally, Neon is used in lighting advertising displays.

A confined quantity of a gas has a pressure of 2.50 atm and a temperature of -22⁰C. What is the new pressure if the temperature is increased to 22⁰C?
a. 2.1 atm
b. 2.5 atm
c. 2.94 atm
d. 3.41 atm

Answers

Answer:

C Ian sure2.94atm

Explanation:

I am low student

What is the name of Br6F10 ?

Answers

Answer:

isopropyl alcohol

Explanation:

HOPE IT HELPS YOU

Water boils at 100°C. What is that temperature on the Kelvin scale? 333 K 213 K 373 K 325 K​

Answers

Your answer is C It’s 373 K

Answer:

I can confirm that 100 degrees Celsius is 373 degreed Kelvin

Explanation:

To be exact, 100°C = 373.15°K, but rounding down would then give us 373.

You have two samples, one is calcite and the other is halite.
How would you differentiate between without using any equipment?
A- Colour
B- Specific gravity
C- Hardness
D- Cleavage

Answers

Answer:

c

Explanation:

You can differentiate between calcite and halite without using any measuring equipment based on: C. Hardness.

What is a mineral?

A mineral can be defined as a form of naturally occurring, inorganic solid substance that is typically characterized by a crystal structure.

The properties of a mineral.

In Science, the properties that can be used to identify and differentiate two or more minerals include the following:

LusterStreakHardness

In conclusion, hardness is a mineral property that can be used to differentiate between calcite and halite without using any measuring equipment.

Read more on hardness here: https://brainly.com/question/24333064

who is princess tianas best friend, if you can get her name right then ill give you brainliest

Answers

Answer:

Oo i think her name is Tiana..... ❤️❤️

Answer:

Charlotte La Bouff

Explanation:

"Lottie" if you will

What other substance (besides salt) could you sprinkle over ice to affect how fast it melts? Describe how you would test the substance's impact on the melting time of ice. Predict the results of such a test.

Answers

Answer:

See explanation

Explanation:

Salt makes ice to melt faster than it usual. Sugar is another substance that influences the melting time of ice.

If i have a sample of pure ice and another sample of ice treated with sugar. I have to maintain the both initially at 0 degrees temperature and have a stop clock to measure the melting time.

I will ultimately notice that the sample of ice treated with sugar will melt faster than the pure sample of ice due to the presence of an impurity.

2C3H7OH + 9O2 -> 6CO2 + 8H2O

How Many Moles of CO2 can be produced by reacting 6 moles of C3H7OH with oxygen?

Answers

Answer:

Up to [tex]18\; \rm mol[/tex] [tex]\rm CO_2[/tex].

Explanation:

The equation for this reaction: [tex]2\; \rm C_3 H_7 OH + 9\; O_2 \to 6\; CO_2 + 8\; H_2O[/tex] is indeed balanced.

Notice that the coefficient of [tex]\rm C_3 H_7 OH[/tex] is [tex]2[/tex] while that of [tex]\rm CO_2[/tex] is [tex]6[/tex].

Therefore, each unit of this reaction would consume [tex]2[/tex] units of [tex]\rm C_3H_7OH[/tex] while producing [tex]6[/tex] units of [tex]\rm CO_2[/tex]. In other words, this reaction would produce three times as much [tex]\rm CO_2\![/tex] as it consumes [tex]\rm C_3H_7OH\![/tex].

If all that [tex]6\; \rm mol[/tex] of [tex]\rm C_3H_7OH[/tex] molecules are actually consumed through this reaction, three times as many [tex]\rm CO_2[/tex] molecules would be produced. That corresponds to [tex]3 \times 6\; \rm mol = 18\; \rm mol[/tex] of [tex]\rm CO_2\![/tex] molecules.

Draw a model to represent the physical property of metals known as ductility, or the ability to be drawn into a wire.

Answers

The model that represents the physical property of metals known as ductility can be seen in the image attached below.

Metals are substances that are good conductors of heat and electricity.

The term ductility is a characteristic of metal and it explains the ability of metals to be drawn into wire. it implies that metal materials can be hammered and beaten into tiny sheets of wires.

The model in the image attached below shows how gold which is metal is drawn into wires.

Learn more about metals here:

https://brainly.com/question/25090336?referrer=searchResults


Give 2 Examples of gasses

Answers

oxygen, carbon dioxide

energy traveling as electromagnetic waves

Radiant

Thermal

Chemical

Mechanical

Answers

Radiant anisishwiwjwkwodixjbx

4) Complete the following statement: Different elements...
A) Must have a mass number of at least 18.
B) Have more electrons than protons.
C) Have the same number of protons.
D) Have different numbers or protons.

Answers

Have a different number of protons
D.) Have different numbers of protons.

BRAINLIEST!

How do the ions in metals behave?

a They are negatively charged.

b They are repelled by electrons.

c They are attracted to each other.

d They are repelled by each other.

Answers

Answer:

attracted towards each other

Explanation:

hope u like the ans

Answer:

The ions in metal behavior by repelled by electro

How many electrons are being shared between the two carbon atoms in the covalent compound ethyne? Ethyne has the structure: H−C≡C−H

Answers

Answer:

Three lines between the carbon atoms in the Lewis structure represent three covalent bonds. Each covalent bond is a shared pair of electrons, hence there are six electrons being shared between the carbon atoms in ethyne.

The number of electrons that are being shared between the two carbon atoms in the covalent compound ethyne is six.

What are covalent bonds?

Covalent bond are formed by the sharing of electrons between two atoms.

In ethyne molecule two carbon atoms are present and between two carbon atoms three covalent bonds are present. And each covalent bond is formed by the sharing of two electrons. So three covalent bonds are formed by the sharing of 6 electrons.

Hence in ethyne 6 electrons are being shared.

To know more about covalent bond, visit the below link:

https://brainly.com/question/12732708

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why would a pregnant mother need more calcium than a woman her age that is not pregnant?​

Answers

Besides building teeth and bones, calcium also keeps your blood and muscles moving and helps your nerves send messages from your brain to the rest of your body. Your body can't make calcium, so you need to get it from food or supplements. While you're pregnant, try to get at least 1,000 mg of calcium every day.

Calcium is a vital mineral. Your body uses it to build strong bones and teeth. calcium is also needed for your heart and other muscles to function properly

If grasshoppers were removed from this food web which organism Would suffer the most birds or Baboon your answer please help thanks

Answers

Answer:

baboon po

Explanation:

basta yan anwer hope helpa

Answer:

birds for sure

Explanation:

cause baboons have another eating source

What is the chemical formula for Tetrasulfur pentoxide?

Answers

Answer:

S 4 O 5

Explanation:

the 4 and 5 are little

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