70 points!!!! will mark the brainliest,
ANSWER ASAP PLS??????????????

70 Points!!!! Will Mark The Brainliest,ANSWER ASAP PLS??????????????

Answers

Answer 1

Answer:

I believe it's A.

Explanation:

Answer 2

Answer:

option C

Explanation:

There are 2 types of changes

Physical change :- The physical properties are changed and its temporary.Chemical change :- The chemical properties are changed and its permanent.

Related Questions

Would a 5-pound bag of iron nails be as dense as a single iron nail?

Answers

Yes. It would be if all the nails are exactly the same.

Answer:

Yes

Explanation:

If you have two pistons in a system, which exerts the larger force?

Answers

Answer:

The larger piston

Explanation:

(i just took the same test)

is there a pattern in how one can predict how many covalent bonds an atom will form?

Answers

Answer:

In molecules, there is a pattern to the number of covalent bonds that different atoms can form. Each block with a number indicates the number of covalent bonds formed by that atom in neutral compound

Explanation:

I don't really know the answer sorry

Heat packs are used to relax muscles. Some heat packs contain iron in a small packet. To
activate this type of heat pack, you need to increase the pressure and introduce oxygen
to create iron(III) oxide which produces the heat needed for muscles to relax. This
reaction in an example of what type of reaction?

Answers

Heat packs are used to relax muscles. This reaction is an example of exothermic reaction.

What is exothermic reaction?

Exothermic reaction is defined as a reaction that is chemical in nature and is characterized by the release of energy in the form of heat and light.

It can also be defined as a thermodynamic process or reaction that releases energy from system to its surroundings.

Endothermic reaction is defined as the chemical reaction in which the reactants absorbs heat energy from the surroundings to form product.  

Endothermic reaction can also be defined as a reaction in which the system absorbs energy from its surroundings in the form of heat.

Being endothermic enables us to live in cooler environments and regulate our body temperatures in order to fight infection.

Thus, heat packs are used to relax muscles. This reaction is an example of exothermic reaction.

To learn more about  exothermic reaction, refer to the link below:

https://brainly.com/question/10373907

#SPJ5

What chemical compound is produced as a result of photosynthesis?
a

Answers

Answer: Specifically, plants use energy from sunlight to react carbon dioxide and water to produce sugar (glucose) and oxygen.

Explanation:

glucose

the overall chemical reaction for photosynthesis is: 6 CO2 + 6 H2O + light → C6H12O6 + 6 O.

Carbon Dioxide + Water + Light yields Glucose + Oxygen

Someone pls help me I will make you brain

Answers

Answer:

the answer is A for this question

A I’m not sure mark me brainliest if I’m right

If you weighed the atoms that appear on the reactant side of the equation, would they have the same mass as the atoms that appear on the product side?

Answers

Answer:

Yes,they will have the same mass.

Explanation:

According to law of  conservation of mass:

'Mass can neither be destroyed nor be created during a chemical reaction'

In a balanced chemical reaction :

Total numbers of atoms on the reactants side are always equal to the total numbers of atoms on the product side.

Total mass of the atoms on the reactant side of the equation is always equal to the total mass of atoms on the product side.

For example:

Number of atoms on reactant side =

=(2)2 Hydrogen atoms + (1)2 Oxygen atoms = 6 atoms

Number of atoms on the product side =

=(2)((2 Hydrogen atoms) + (1 Oxygen atoms)) = 6 atoms

Mass of of reactants = (2)(number of hydrogen atoms)(mass of hydrogen atom) + (1)(number of oxygen atoms)(mass of oxygen atoms)

= (2)(2)(1u)+(1)(2)(16u) = 36u

Mass of products = 2((number of hydrogen atoms)(mass of hydrogen atom)+(number of oxygen atoms)(mass of oxygen atom))

= 2((2)(1u)+(1)(16u)) = 36u

Mass of of reactants = Mass of products = 36u

Someone please help :/
I'm writing a lab report for my chem class on crystalline structures and I have absolutely no idea how to write the introduction. Can someone please direct me on how exactly I should write this?
Thanks!

Answers

Answer:

yes i will help

txt me. down and show what is the. project

Help me figure out these I’ll mark u brainliest
It’s science

Answers

Answer:

1. organic

2. plants

3. algae?

4. oxygen

5. Uses

Regular table salt is sodium chloride, NaCl. It is a bonding of an Na+ ion and a Cl- ion. Which of these ions is bigger?

Answers

Answer:

in the periodic table we can see that the ions of Cl is greater than the ions in Na

Cl- ion is bigger than Na+ ion because of the presence of more number of electrons.

The atomic number of sodium+ ion is 10 means it has 10 number of electrons which can accommodate into 2 shells or orbits while on the hand, chlorine- ion has atomic number 18 means it has 18 number of electrons which can be accommodate into 3 shells or orbit.

So there is one shell more in chlorine ion as compared to sodium ion which make the size of chlorine ion large so we can conclude that chlorine ion is bigger than sodium ion.

Learn more: https://brainly.com/question/25151670

Viết các phương trình phản ứng dưới dạng phân tửvà ion thu gọn trong các trường hợp sau đây:a)CaCl2+ K2CO3b)Zn(OH)2+ KOH 

Answers

God is the answer because he sucks balls respectfully

Boron has two naturally-occurring isotopes. Boron-10 has an abundance of 19.8% and actual mass of 10.013 amu, and boron-11 has an abundance of 80.2% and actual mass of 11.009 amu. What is the average atomic mass for all isotopes of boron?

A 10.0 amu

B 10.5 amu

C 10.511 amu

D 10.812 amu

Answers

Answer:

D) 10.812

Explanation:

Given:

The two isotopes of boron (B).

Boron-10 has an abundance of 19.8% and Boron -11 has an abundance of 80.2%

To find:

The atomic mass of europium.

Solution:

Mass of Boron-10 = 10.013 amu

The percentage abundance of Boron-10 = 19.8%

The fractional abundance of Boron-10 =0.198

Mass of Boron-11 = 11.009 amu

The percentage abundance of Boron-11= 80.2%

The fractional abundance of Boron-11= 0.802

The average atomic mass of Boron = A.M

A.M = Mass of isotope x Fractional abundance of isotope

= 10.013amu x 0.198 +11.009amu x 0.802 = 10.81u

Therefore, D) 10.812 amu is the atomic mass of boron.

Anyone wanna have fun? gvk psad wsq​

Answers

Answer:

Nope im cool to sleep right now

Explanation:

in structural isomers atoms and functional groups join together in different ways. which of the following statements is not correct with respect to structural isomers

Answers

Structural isomerism is based on the existence of different molecular

structures formed by the same elements.

The statement that is not correct with respect to structural isomers is; All

structural isomers show hydrogen bonding.

Reason:

Structural isomers are isomers that have different molecular structures but

the same molecular formula. They are referred to as constitutional isomers

Therefore;

The empirical formula which is obtainable from the molecular formula is the same for structural isomers.The structural formula of structural isomers are differentStructural isomers that are functional isomers have different chemical properties.

However;

Structural isomers that are linkage isomers may not have hydrogen bonding.

Therefore, the statement that is not correct with respect to structural isomers is; All structural isomers show hydrogen bonding.

 

Learn more here:

https://brainly.com/question/12796779

The question options are;

The same empirical formula among structural isomers.

Different physical and chemical properties can be possessed by structural isomers.

Structural isomers have different structural formulas.

Hydrogen bonding is shown in all structural isomers.

All the above statements are correct.

How do animals and plants rely on each other in the prairie? ITS TIMED

There are many decomposers in the prairie that can be used as food sources for first-order consumers.
There is more sunlight in the prairie for plants to grow, and therefore more food sources for animals.
Second-order consumers eat the grass as their food source.
The grass in the prairie provides oxygen, while animals give off carbon dioxide gas.

Answers

Answer:

I would assume its the last one "The grass in the prairie provides oxygen, while animals give off carbon dioxide gas."

Explanation:

The question asks how the animals and plants rely on each other

The plants provide oxygen and food for the animals, and the animals provide carbon dioxide to them.

Hope this helps :D

In the fall, how does the high pressure area
affect the hurricane?

Answers

Answer:

Hurricanes occur when ocean water warms during the spring, summer and early fall.

Explanation:

Warm air just above the water’s surface rises. The rising warm air creates a reduction in pressure at the surface, what meteorologists call a low-pressure area. Because nearby air is at a higher pressure, it will flow into the low-pressure zone.

https://www.sidmartinbio.org/how-does-a-high-pressure-system-affect-a-hurricane/

What is the v if = 8 m and f = 20 Hz?

Answers

Answer:

Explanation:

it is 980

Which statement correctly compares ice and liquid water?
A. Both liquid water and ice have definite shapes.
B. Particles of liquid water have more energy than particles of ice.
C. Liquid water has a lower temperature than ice.
D. Ice has a definite volume, but liquid water does not.

Answers

Answer:

B. Particles of liquid water have more energy than particles of ice.

Explanation:

We can work this out through eliminating the wrong statements.

A. Both liquid water and ice have definite shapes.

This is wrong because, as stated in the question, water is a liquid, and one of the properties of liquids is that they change shape to fit the shape of their container. If it changes shape, it does not have a "definite" shape.

B. Particles of liquid water have more energy than particles of ice.

This is correct, and here is why. There are 3 states of matter: solid, liquid and gas. As you apply heat energy to an object at each state, the particles receive more energy and can move around more (this is kinetic energy). In the case of liquid (water) and solid (ice), particles in solids do not have much energy and stay in rigid formations. They do vibrate slightly, but only on the spot (this is what gives solids "definite" shapes). On the other hand, particles in liquids have more energy than particles in solids, which means that they can move more (more kinetic ENERGY) and do not stay in formations (this is why they do not have "definite" shapes). Therefore, particles in liquids (water) have more energy than particles in solids (ice), and this statement is correct.

C. Liquid water has a lower temperature than ice.

This is wrong because liquids have more energy than solids. As explained earlier, the reason why particles in liquids have more energy is because more HEAT energy has been applied to them. In the same way, solids have less energy because less HEAT energy has been applied to them. Less heat means a lower temperature. (Also you can use common sense for this one, ice feels colder than liquid water, right?)

D. Ice has a definite volume, but liquid water does not.

This is wrong because of the law of conservation of mass. This law states that particles (or matter or volume) cannot be created or destroyed. When ice melts and becomes liquid water, it has not lost volume: the particles have just gained more energy. This question is most likely there to confuse you, because all substances have definite volumes.

I hope this helps!

A central atom is found to have one double bond, one single bond, and one non-bonding pair of electrons. how many electron domains does the central atom have?

Answers

Answer:

A central atom is found to have one double bond, one single bond, and one non-bonding pair of electrons

A 1.044 g sample contains only vitamin C (C6H8O6) and sucralose (C12H19Cl3O8). When the sample is dissolved in water to a total volume of 33.0 mL, the osmotic pressure of the solution is 3.69 atm at 295 K. What is the mass percent of vitamin C and sucralose in the sample?​

Answers

Answer:

Refer the attachment for answer..

hope it helps you..

Hòa tan hoàn toàn 1,93 gam hỗn hợp 2 kim loại Fe và Al vào dd HCl dư, sau phản ứng thu được m gam muối và 1,456 lít khí H2 ở đktc. Giá trị của m là:

Answers

Answer:

Sorry pal! Didn't understand your language.  

:(

Explanation:

A container contains three gases. If the partial pressure of carbon dioxide is 0.50 atm, the partial pressure of nitrogen is 0.30 atm, and the partial pressure of methane is 0.40 atm, what’s the total pressure inside the container?

Answers

Answer:

1.20 atm

Explanation:

A container contains three gases. If the partial pressure of carbon dioxide is 0.50 atm, the partial pressure of nitrogen is 0.30 atm, and the partial pressure of methane is 0.40 atm, what’s the total pressure inside the container?

Do not let chemistry questions SCARE you!  The TOTAL means

ADD THEM UP.

You can do this without a scientific calculator :-)

0.50 +0.30 + 0.40 = 1.20 atm

What is 40g of calcium and 71 g of chlorine

Answers

The answer is 111g of calcium chloride

how many barr bodies are found in a normal human female nucleus

Answers

Answer:

One Barr body

Explanation:

Question 4 (2 points)
(02.04 MC)
Jackson is making dinner and is trying to dissolve salt into a pot of water. The salt is dissolving slowly. What should Jackson do to speed up the
rate of dissolving? (2 points)
O.
Ob
Oc
He should put larger salt particles in the water.
He should hear the water to a higher temperature.
He should completely stop stirring the pot of water.
He should slow down the speed he is stirring the pot
Od
Question 5 (2 points)
(02.04 MC
ribed below

Answers

Answer:

B. He should heat the water to a higher temperature.

Explanation:

Tiny particles that make up water and salt vibrate at higher speeds in hotter temperatures, which mixes the salt and water faster. This causes salt to dissolve much faster.

how much mass is in a proton

Answers

Answer:

1.673 x 10^-27 kg

Explanation:

1.67262 × 10−27 kg, which is 1,836 times the mass of an electron

* What element has an electron configuration of
1s2 2s2 2p6 3s2 3p6 4s2 and which block is it in? Use the periodic table.

Answers

Answer:

phosphorus

Explanation:

wants to help?
it's agriculture science not chemistry​

Answers

Answer:

the jamaians need food to survive

Explanation:

d. Period 3 element with 6 valence electrons

Answers

Answer:

Sulfur is an element is Period 3 with 6 valence electrons.

Which phrase describes the thermal energy of a sample of matter?

O A. The total kinetic energy of the particles of matter
B. The kinetic energy of the slowest particles of matter
O C. The average kinetic energy of the particles of matter
O D. The temperature of the fastest particles of matter

Answers

The answer is A: The total kinetic energy of the particles of matter. I hope this helps

Answer:

O A. The total kinetic energy of the particles of matter

Explanation:

I got it right on assignment. (°ω°)

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