15 points who can solve help plsss now

15 Points Who Can Solve Help Plsss Now

Answers

Answer 1

Answer:

C. Al and O2

Explanation:

The reactants are the elements or compounds that is becoming the result

So Al and O2

Hope this helps!


Related Questions

a. Write thepossible isomers of C4 HgBr4​

Answers

The four isomers of C4​H9​OH are

As refer to IMAGE 01- Butan−1−ol

As refer to IMAGE 02- Butan−2−ol

As refer to IMAGE 03- 2−methylpropan−2−ol

As refer to IMAGE 04- 2−methylpropan−1−ol

solution

https://www.toppr.com/ask/en-gb/question/write-down-all-isomers-of-c4-h9oh/

Liquids have a definite volume when poured into a container. What does this mean?

Answers

Answer:

A solid has definite volume and definite shape, a gas has neither definite volume nor definite shape, and as said in the question, a liquid has a definite volume but no definite shape.

What this means is that even though liquid molecules can slide past each other and move to fill up the space they are in (this means that liquids have no definite shape), they keep their volume. That is, liquids have consistent, unchanging volume.

Hopefully that's helpful! :)

What are the molecular formulae of the following compounds ?

Hydrochloric acid, sulphuric acid, sodium chloride, glucose, methane. ​

Answers

Let's see

[tex]\\ \sf\longmapsto Hydrochloric\:acid=HCL[/tex]

[tex]\\ \sf\longmapsto Sulphuric\:acid=H_2SO_4[/tex]

[tex]\\ \sf\longmapsto Sodium\: Chloride=NaCl[/tex]

[tex]\\ \sf\longmapsto Glucose=C_6H_12O_6[/tex]

[tex]\\ \sf\longmapsto Methane=CH_4[/tex]

.

Answer:

the molecular formulae of the following compounds are:

Hydrochloric acid: HCl

Sulphuric  acid:[tex]H_2SO_4[/tex]

sodium chloride: NaCl

glucose:[tex]C_6H_{12}O_6[/tex]

methane:[tex]CH_4[/tex]

Explanation:

Examples of errors in colorimetry experiments

Answers

Answer:

The lack of accuracy and underestimation of absorbance readings obtained from the colorimeter can be contributed to many experimental factors. One plausible error is from the imperfection of the absorber, in that it may not completely absorb the stray light passing by the perimeters of the photoresistor.

Explanation:

In practice there are other sources of error, such as environmental effects on photometer and sample, temperature, line voltage fluctuations, vibrations, contamination, or heating of the sample by the photometer. All these factors may impair the measured result, and ways and means are known to test and eliminate them.

two step mole conversions, giving brainliest

Answers

Answer:

Our process will be to change the mass of NO2 to moles by dividing by the molar mass, and then we multiply the number of moles with Avogadro's number (6.02 x 10^23)

Molar mass of NO2 = (14) + (16)x2 = 46g/mol

45.8/46 = 0.99 or just 1 mole when you round it.

Now just multiply the moles with Avogadro's number

1 x (6.02 x 10^23)

= 6.02 x 10^23 molecules of NO2 reside in 45.8g of NO2

what is the nature of the p-o bond in phosphorus pentoxide (p2o5)?

Answers

Answer:

the nature of the bond is covalent.

covalent bonds are bonds between 2 NON-METAL elements. since phosphorus and oxygen are both non-metals, the bond formed between them is covalent.

hope this answers your question!

why do solids maintain their shape whereas fluids do not

Answers

Fluids do not maintain their shape however they cannot be compressed or spread throughout a container

What would be the partial pressure of nitrogen, PN2, in a room in which the total air pressure was 0.987 atm?

Answers

This problem is providing describing a room in which air has a total pressure of 0.987 atm and the partial pressure of nitrogen is asked, turning out to be 0.746 atm.

In such a case, we can start by looking at the provided table, which shows the composition of dry air in mass basis, which means we must convert the composition of nitrogen to mole fraction by knowing that the average molar mass of air is 28.9647 g/mol, and thus, we infer that the mole fraction of nitrogen in air is about 0.755 according to:

[tex]x_{N_2}=\frac{0.781*14.0067g/mol*2}{28.9647g/mol} =0.755[/tex]

Then, we recall the Dalton's law version that relates total pressure, partial pressure and mole fraction written for nitrogen:

[tex]P_{N_2}=x_{N_2}P[/tex]

Finally, we plug in the previously calculated mole fraction and the total pressure of air to obtain:

[tex]P_{N_2}=0.755*0.987 atm\\\\P_{N_2}=0.746atm[/tex]

Learn more:

(Gas laws) https://brainly.com/question/8511562(Dalton's law) https://brainly.com/question/14119417

BRAINLIEST TO FIRST RIGHT ANSWER

Students were investigating heat transfer by conduction and they set up the simple experiment you see here. They utilized three spoons made of different materials: the specific heat capacity of each material was recorded in the students' data table. Each spoon was placed in a pot of hot (90°C) water and a pat of butter was placed on the handle of each spoon. The butter melted first on the tin spoon and in about the same amount of time on the plastic and wood spoons. Based on the data table and the experimental results select ALL of the conclusions that are appropriate.

A) Conduction occurred more readily in the tin due to its lower specific heat
capacity

B) Heat transfer via conduction occurred from the hot water to the spoons
and then to the butter,

C) When in contact with hot water, there was no transfer of kinetic energy
through the wood or plastic

D) The atoms in the tin spoon vibrated and collided at a greater rate thon
those in the wood or plastic spoons

E) In all three cases energy s transferred from the faster moving hot water
molecules to the slower moving molecules in the spoon​

Answers

Answer:

the Answer is A B D

Explanation:

the cunduction in the spoons are equal to all the following answers

Conduction occurred more readily in the tin due to its lower specific heat capacity, Heat transfer via conduction occurred from the hot water to the spoons and then to the butter, The atoms in the tin spoon vibrated and collided at a greater rate thon those in the wood or plastic spoons. Thus option A,B, D are correct.

What is specific heat ?

Specific heat can be measured as the quantity of heat required to increase the temperature of one gram of a substance by one degree Celsius.

The units of specific heat  are represented as calories or joules per gram per Celsius degree such as the specific heat of water is 1 calorie  per gram per Celsius degree

Specific heat capacity= Heat quantity/ mass × change in temperature.

If Q is the quantity of heat in joules, M is the mass of substance heated,

If ∆O is the change in temperature in Kelvin, Then Q= MC∆O, C is a constant called Specific heat capacity. Therefore, making C the subject of formula:

C= Q /M∆O

Thus option A,B, D are correct.

Learn more about specific heat, here:

https://brainly.com/question/15177263

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Do cells have atoms?

Answers

Answer:

Ye? everything is made up of atoms so sure

What are the most of the elements in the periodic table

Answers

Answer:

Most of the elements in the periodic table are metals.

Hope that helps. x

Answer:

Here is your answer,mate!

Explanation:

Metals are the most of the elements in the periodic table.

Identify the subatomic particles in strontium-82 and rubidium-82. Then, explain what type of nuclear decay is most likely to convert strontium-82 to rubidium-82.

Answers

We can convert strontium-82 to rubidium-82 by positron emission.

The three main fundamental subatomic particles in an atom are;

ProtonsNeutronsElectrons

In a neutral atom, the number of protons is always equal to the number of electrons.

In strontium-82, there are 44 neutrons, 38 electrons and 38 protons. In rubidium-82, there are 45 neutrons, 37 electrons and 37 protons. We can convert  strontium-82 to rubidium-82 by positron emission.

Learn more about positron emission: https://brainly.com/question/11594309

Which example accurately describes a solution?

Answers

Typical examples of solutions are

Alcoholic beverage (ethanol in water)Gasoline

What is a solution?

A solution can be defined as a mixture (homogeneous) of two or more substances typically a solute in a solvent, the solvent is usually in greater quantity and the substance or substances present in lesser amounts are the solutes.

Other good examples of a solution

Common examples of solutions are  sugar in water and salt in water solutions, soda water,

Furthermore, solutions can be homogenous or heterogenous

Learn more about solutions here:

https://brainly.com/question/2626617

What state of matter has a defined volume but undefined shape?

Question 6 options:

gases

liquids

solids and liquids

liquids and gases

Answers

Answer:

Liquids

Explanation:

They have a certain volume but they take the shape of their container

Which atom has the largest atomic radius? *
1.Cl
2.F
3.I

Answers

Answer: 2

Explanation:I think

Which model of the atom is thought to be true?

A. Protons, electrons, and neutrons are evenly distributed throughout the volume of the atom.
B. The nucleus is made of protons, electrons, and neutrons.
C. Electrons are distributed around the nucleus and occupy almost all the volume of the atom.
D. The nucleus is made of electrons and protons.

Answers

Its A. Explanation:I just know

How many moles are in 1.93 x 10^24 atoms of gold

Answers

Answer:

We know that 1 mole equals to 6.02 x 10^23 atoms (which is Avogadro's number), so to get to atoms from moles, you would divide the atoms of gold by Avogadro's number

(1.93 x 10^24) / (6.02 x 10^23)

= 3.2 mol of gold (rounded)

It measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 3.21 moles of gold are in 1.93 x 10²⁴atoms of gold.

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. Mole is directly proportional to the given number of atoms.

Given number of atoms of gold= 1.93 x 10²⁴atoms

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

Mole of gold =given number of atoms of gold ÷ 6.022×10²³(Avogadro number)

Substituting all the given values, we get

Mole of gold = 1.93 x 10²⁴atoms ÷ 6.022×10²³(Avogadro number)

Moles of gold=3.21 moles of gold

Therefore, 3.21 moles of gold are in 1.93 x 10²⁴atoms of gold.

To know more about mole, here:

https://brainly.com/question/15209553

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Select the correct answer.
In which situation is chemical energy being converted to another form of energy?
A.
a lamp plugged into the electric grid
B.
a fluttering flag
C.
a floating wooden log
D.
a burning candle

Answers

D Burning a candle Please mark me brain list


A 24.81-g sample of a gaseous compound containing only carbon, oxygen, and chlorine is determined to contain 3.01 g C, 4.00 g O, and 17.81
g Cl. What is this compound's percent composition?

Answers

Explanation:

getting the empirical formula

For carbon

3.01/12 = 0.2508

For oxygen

4/16 = 0.25

For Cl

17.81/35.5= 0.501

0.2508 ÷ 0.25 = 1.0032

0.25 ÷ 0.25 = 1

0.501 ÷ 0.25 = 2.004

Empirical formula of the compound = CCl20

Molar mass = (1×12) + (2×35.5) + (1×16)

= 12 + 71 + 16

= 99g/mol

percentage composition= 24.81/99 × 100

= 25.06%

A 24.81-g sample of a gaseous compound containing only carbon, oxygen, and chlorine is determined to contain 3.01 g C, 4.00 g O, and 17.81 g Cl. the compound's percent composition is  25.06%.

What are the application of carbon ?

The impure form of carbon is Amorphous which is used for the manufacture of car batteries and dry cells, ink and paints; So the majority element of carbon is present in charcoal, so these are used as fuel.

Graphite is derivative form of carbon used as a lubricant in heavy industrial machinery, making pencil leads, these carbon are used in the production of steel.

The empirical formula, For carbon 3.01/12 = 0.2508

For oxygen 4/16 = 0.25, For Cl 17.81/35.5= 0.501, 0.2508 ÷ 0.25 = 1.0032

0.25 ÷ 0.25 = 1

0.501 ÷ 0.25 = 2.004

Empirical formula of the compound = CCl20

Then the Molar mass = (1×12) + (2×35.5) + (1×16)

= 12 + 71 + 16

= 99g/mol

percentage composition= 24.81/99 × 100

= 25.06%

Learn more about carbon, here:

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Which subatomic particles have a positive charge and are located in the nucleus?
a. neutrons
b. atoms
c. electrons
d. protons

Answers

Answer: protons

Explanation:

a) Neutrons are located in the nucleus but have a negative charge.

b) Atoms are not subatomic particles but are rather made of subatomic particles.

c) Electrons are subatomic particles with a negative charge that are located outside of the nucleus.

d) Protons are subatomic particles that are located in the nucleus and have a positive charge.

carbondiooxide does not support in burning but mg burs in it why.?​

Answers

To keep burning, fires require oxygen. Carbon dioxide is used in certain fire extinguishers to put out flames. Explanation: Because magnesium is higher on the reactivity scale than carbon, it is more reactive and eliminates oxygen from carbon dioxide (to give carbon and magnesium oxide).

PLEASE HELP I DON´T KNOW WHAT THE DIFFERENCE BETTWEEN THE TWO IS!


What is the difference between a product and a reactant.

Answers

Answer:

A reactant is a substance that is present at the start of a chemical reaction. A product is a substance that is present at the end of a chemical reaction.

Explanation:

How far do you think a plate can move in one day?

Answers

Over a meter, I’d guess

B. Number the digestive process in the correct sequence. Write A-E on the blank 21. Food moves into the small intestine. 22. Food is stored and further broken down by acid and powerful enzymes 23. Your saliva helps break down what you're eating and turn it into chemicals called enzymes. 24..Food moves through your esophagus. 25. Anything left in the small intestine moves into the large intestine​

Answers

Answer:

21. D (Food moves into the small intestine.)

22. C (Food is stored and further broken down by acid and powerful enzymes.)

23. A (Your saliva helps break down what you're eating and turn it into chemicals called enzymes.)

24. B (...Food moves through your esophagus.)

25. E (Anything left in the small intestine moves into the large intestine.)

Explanation:

Food first enters the mouth where it is chewed and broken down by salivary amylase. Then, it is swallowed, moving down the esophagus to the stomach where it is stored and further broken down by acids and enzymes. And, these broken down food molecules moves into the large intestine.

Part A
What question is being asked through this scientific investigation?
(I didn’t know what subject so sorry, also only answer if u have an answer.)

Answers

pretty sure it’s to see whether carbon dioxide is formed in each bottle so if it does form then the balloon would expand

Answer:

How will the ingredients effect the fermentation of each bottle? What will happen to the bottles and balloons when fermentation occurs?

Explanation:

report the elements half life. if we start with 100g of your element (platinum) how long will it take to have 6.26g?

Answers

Answer:

did u get the answer yet

Explanation:

Why do some atoms form chemical bonds while others do not?

Answers

Answer:

Atoms of these elements have full outer electron shells. These atoms are stable and very rarely form bonds with other atoms. If the electronegativity values between two atoms are comparable, they may still form chemical bonds to increase the stability of their valence electron shell

Explanation:

Fill in the blank:
A correctly written hypothesis uses an ____ ______ statement

Answers

Answer:

a theory of a experiment and the experiment acts like a judge determining if the hypothesis is right or wrong from the final test result

Explanation:

How long is a sunflower seed? Select the best estimate.
15 meters
15 kilometers
15 millilmeters
15 centimeters

Answers

Answer:

15 millimeters

Explanation:

the other answer choices are too large.

Answer:

15 millimeters

Explanation:

The other options are too long.

21. Which of the following is the best way to clean up an acid spill?
A. Wash down the acid spill with plenty of water.
B. Wipe up the acid spill with paper towel.
C. Spread sawdust on the acid spill to absorb it.
D. Neutralize the acid spill with a base; then wash it with plenty of water.
T1

Answers

The answer is D
If wrong then sorry
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