An atom with a mass number of 27 has 14 neutrons. What element is the atom?

Answers

Answer 1

Answer:

aluminum i think

Explanation:


Related Questions

Which of the following is a buffer system?
A. NaCl and NaNO3
B. H2CO3 and KHCO3
C. HCl and NaOH
D. H2O and HCl
E. NaCl and NaOH

Answers

Answer:

B. H2CO3 and KHCO3

Explanation:

The buffer system is a system in which the solution deny for change in the ph level i.e. at the time when the acid is added to it. It can be made either in a weak acid and salt or can be a weak base and its salt. Now when the acid is added to a buffer so the ratio is not impacted due to which it does not change sufficient for pH level

As per the given options, the third one is correct as the H2CO3 denotes a weak acid and the KHCO3 represents the salt. And these two solution does not create any change in the level of pH

Therefore the option B is correct

When 3.0 g of water is warmed from 10.0∘C to 80.0∘C, how much heat energy is needed? Specific heat for water is 4.186Jg(∘C).

Answers

Answer:

Specific heat is the amount of heat energy required to raise the temperature of substance by, the units for specific heat is, each element have particular fixed specific heat.

The heat energy change can be obtained by the formula

Temperature change can be represented by 

If we know the specific heat of substance then we can easily calculate the heat energy change of the substance

13 C4- has _______ electrons.​

Answers

Answer:

10 electrons

Explanation:

What are the best practices for safely handling waste in the lab? Select one or more: Check labels or instructions before any disposal. Always wear appropriate Personal Protective Equipment. Place any paper towels from the clean-up in the trash. Remove gloves for better manipulation of the waste containers

Answers

Answer:

Consult labels or instructions before disposing of it. Always wear the proper personal protective equipment. Put all cleaning paper towels in the trash

Explanation:

Gloves should never be removed when disposing of waste, since these can contain infected fluids or even cultivated microorganisms that are pathogens for our lives and can enter through a lesion of the continuity solution of the epithelium in our hands.

In other words, if there is a wound, and it is contaminated with waste by not wearing gloves, the risk of contracting diseases is much greater.

What mass of aluminum has a total nuclear charge of 3.0 C?Aluminum has atomic number 13. Suppose the aluminum is all of the isotope with 14 neutrons.

Answers

Answer:

The value is [tex]m = 6.48*10^{-5} \ g [/tex]

Explanation:

From the question we are told that

The total nuclear charge is [tex]Q_t = 3.0 \ C[/tex]

The atomic number is [tex]n = 13[/tex]

The number of neutrons is [tex]n = 14[/tex]

Generally the number of protons is mathematically represented as

[tex]N_p = \frac{Q_t}{p}[/tex]

Here p is the charge on a proton with the value [tex]p = 1.60 *10^{-19} \ C[/tex]

=> [tex]N_p = \frac{3}{p}[/tex]

=> [tex]N_p = \frac{3}{1.60 *10^{-19} }[/tex]

=> [tex]N_p = 1.875*10^19 \ protons [/tex]

Generally the number of atoms present is mathematically represented as

[tex]N_a = \frac{N_p}{n }[/tex]

=> [tex]N_a = \frac{ 1.875*10^19}{13}[/tex]

=> [tex]N_a = 1.44*10^{18} \ atoms [/tex]

Generally the number of moles of atom present is mathematically represented as

[tex]N = \frac{N_a}{A_n }[/tex]

Here [tex]A_n[/tex] is the Avogadro's number with a constant value

[tex]A_n = 6.023*10^{23}[/tex]

So

[tex]N = \frac{1.44*10^{18}}{6.023*10^{23} }[/tex]

=> [tex]N = 2.4*10^{-6} \ mol[/tex]

Generally the total mass is mathematically represented as

[tex]m = N * M[/tex]

Here  M is the molar mass of   aluminum with

         [tex]M  =  27 \  g/mol[/tex]

So

        [tex]m  = 2.4*10^{-6}  * 27[/tex]

         [tex]m  = 2.4*10^{-6}  * 27[/tex]

         [tex]m  = 6.48*10^{-5} \  g [/tex]

The mass of aluminum has a total nuclear charge of 3.0 C is 6.45 * 10⁻⁵ g

Number of protonsNumber of protons = nuclear charge/charge on proton

nuclear charge = 3.0 C

mass of proton = 1.60 * 10⁻¹⁹ C

Number of protons = 3.0/1.60 * 10⁻¹⁹ C

Number of protons = 1.875  * 10¹⁹ protons

Number of atomsNumber of atoms = number of protons /atomic number

atomic number = 13

Number of atoms = 1.875  * 10¹⁹/13

Number of atoms = 1.44 * 10¹⁸ atoms

Number of moles of atomsMoles of atoms = number of atoms / 6.02 * 10²³

moles of atoms =  1.44 * 10¹⁸/ 6.02 * 10²³

moles of atoms = 2.39 * 10⁻⁶ moles

Mass of aluminummass = number of moles * molar mass

molar mass of Aluminum is 27 g

mass of aluminum = 2.39 * 10⁻⁶ * 27

mass of aluminum = 6.45 * 10⁻⁵ g

Therefore, the mass of aluminum has a total nuclear charge of 3.0 C is 6.45 * 10⁻⁵ g

Learn more about nuclear charge and atomic mass at: https://brainly.com/question/14783477

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Aqueous hydrochloric acid HCl will react with solid sodium hydroxide NaOH to produce aqueous sodium chloride NaCl and liquid water H2O. Suppose 9.84 g of hydrochloric acid is mixed with 3.1 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to 2 significant digits.

Answers

Answer:

1.4 g H₂O

Explanation:

In a reaction, the reactants are usually not present in exact stoichiometric amounts, that is, in the proportions indicated by the balanced equation. Frequently a large excess of one reactant is supplied to ensure that the more expensive reactant is completely converted to the desired product. Consequently, some reactant will be left over at the end of the reaction. The reactant used up first in a reaction is called the limiting reagent, because the maximum amount of product formed depends on how much of this reactant was originally present. When this reactant is used up, no more product can be formed.

Which of the following is a homogenous mixture? a. water b. chicken c. raisin bread d. salad

Answers

B and C are ur answers

Materials
80 mL Carbonated Water
80 mL Acetic Acid
(2) Chalk Pieces (CaCO3)
Permanent Marker
*80 mL Tap Water
*Timer (watch, cell phone, internet, etc.)
Note: You must provide the materials listed in *red.
Labware
(3) 250 mL Beakers
Digital Scale
EXERCISE 1: SPELEOLOGY (UNDERSTANDING CAVE FORMATION)
In this exercise, you will observe what happens to chalk in different solutions and compare your observations to what occurs in nature.
1. Do the results of the exercise support your hypothesis? Explain your reasoning.
2. Compare and contrast the reaction of the chalk pieces in each solution.
3. Is this exercise an analog for physical or chemical weathering? Explain your reasoning.
4. Using your observations of the chalk in different solutions, explain how a limestone cave forms.

Answers

Answer:

Limestone caves are formed when acid rain occurs.

Explanation:

When chalk pieces which is made of calcium carbonate react with acetic acid, it produces carbon dioxide, calcium acetate, and water. When calcium carbonate react with Carbonated Water produces calcium bicarbonate. Limestone cave forms when the dissolution of limestone occur when rainwater which is acidic due to the addition of carbondioxide in the air react with limestone. This dissolution removes the lime from the rock and caves are formed.

The chalk has been made up of calcium carbonate. The reaction of calcium carbonate with different solutions results in the formation of varying products.

The reaction of chalk with acetic acid results in the formation of Calcium acetate, with the production of carbon dioxide and water.

The reaction of chalk with carbonated water results in the formation of calcium bicarbonate.

The limestone caves has been formed by the dissociation of limestone with reaction of acid, forming carbon dioxide.

The formation has takes place in the acidic solution, and carbon-dioxide thus the resultant can be due to the acid rain.

For more information about the limestone cave, refer to the link:

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Water that is heated move
PLS HELP !!!

Answers

Answer:

it moves faster when heated

Answer:

the answer is faster

Explanation:

why because water moves faster when heated

Can you help me answer the question ?

Answers

the answer is vacuole

wich element is likely to be the most reactive? bromine (Br) chlorine (Cl) fluorine (F) iodine (I)

Answers

most reactive among them is fluorine because it is the most electronegative element

Answer:

fluorine (F)

Explanation:

I took the test on edge

How many sig figs are in 340.0 mL

Answers

Answer:

4

Explanation:

there is a decimal place present. so you would take away any zeros before the number.

Answer:

4 i think

Explanation:

What determines the shape and function of a protein?

Answers

The function is determined by shape. The protein is determined by its primary structure which is the sequence of amino acids.
Amino acid sequence is determined by nucleotides in the gene (DNA)

The shape and function of a protein are primarily determined by its three-dimensional structure, which is a result of its primary, secondary, tertiary, and quaternary structures.

Primary Structure: The primary structure of a protein is the linear sequence of amino acids that make up the polypeptide chain. The sequence is dictated by the genetic information encoded in the DNA of the gene that corresponds to the protein. Each amino acid in the sequence is represented by a specific codon in the DNA, and this sequence of amino acids forms the backbone of the protein.

Secondary Structure: The secondary structure refers to the local spatial arrangement of the polypeptide backbone, which is stabilized by hydrogen bonds between amino acids. The two most common secondary structures are alpha-helices and beta-sheets. These structures are important for the stability and folding of the protein.

Tertiary Structure: The tertiary structure is the three-dimensional folding of the entire polypeptide chain, including the secondary structure elements. Various interactions, such as hydrogen bonds, disulfide bridges, ionic interactions, hydrophobic interactions, and van der Waals forces, play a crucial role in stabilizing the tertiary structure. This folding brings distant parts of the polypeptide chain close together, contributing to the unique shape of the protein.

Quaternary Structure: Some proteins are composed of multiple polypeptide subunits, and the way these subunits come together forms the quaternary structure of the protein. The interactions between the individual subunits contribute to the overall structure and function of the complex protein assembly.

Learn more about protein from the link given below.

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What ions are present in an aqueous solution of NiCl2?

Answers

Answer:

Ni²⁺ and Cl⁻ ions

Explanation:

NiCl₂ is an ionic compound which is composed by 2 chloride ions (Cl⁻) and 1 nickel (II) ion (Ni²⁺). It dissociates in water as follows:

NiCl₂ ⇒ Ni²⁺ + 2 Cl⁻

Therefore, in an aqueous solution of NiCl₂ will be present Ni²⁺ ions and Cl⁻ ions.


What is heat?
O Fire
O Hot
O Energy
O Potential

Answers

Answer:

Energy

Explanation:

Heat is a form of energy.

During which change of state do atoms lose energy?

A. Sublimation
B. Freezing
C. Boiling
D. Melting


If you answer my question Thank You, If I don't thank you in time!

Answers

The answer is A. I know because I know.
The answer to your question is A, Sublimation.

when the temperature of a sample of liquid increases , what else increases ?

Answers

Answer:

Its kinetic energy.

Explanation:

In a liquid, the molecules are so close together that there is very little empty space. A liquid also has a definite volume, because molecules in a liquid do not break away from the attractive forces. The molecules can, however, move past one another freely, and so a liquid can flow, can be poured, and assumes the shape of its container.

An increase in the temperature of a liquid causes an increase in the average speed of its molecules. As the temperature of a liquid increases, the molecules move faster thereby increasing the liquid's kinetic energy.

What is the mass of a block that measures 6.7cm x 6.8cm x4.3cm and has a density of 22.29g/cm³

Answers

Answer:

4366.8 grams or 4.4 kg

Explanation:

Density = Mass / Volume

Mass = Density x Volume

M = 6.7 x 6.8 x 4.3 x 22.29

M = 4366.8 g

Best Regards!

The element X has three naturally occurring isotopes. The isotopic masses (amu) and % abundances of the isotopes are given in the table below. Calculate the average atomic mass of the element in amu. PLEASE HELP ASAP THANK YOU SO MUCH

Answers

Answer:

162.35 amu

Explanation:

Let A represent isotope X-159

Let B represent isotope X-163

Let C represent isotope X-164

The following data were obtained from the question:

Isotope >>> Abundance >>> Mass no

A >>>>>>>> 30.60 >>>>>>>> 159.37

B >>>>>>>> 15.79 >>>>>>>>> 162.79

C >>>>>>>> 53.61 >>>>>>>>> 163.92

Average Atomic mass =.?

The average atomic mass of element X can be obtained as follow:

Average atomic mass = [(mass of A × A%)/100] + [(mass of B × B%)/100] + [(mass of C × C%)/100]

= [(159.37 × 30.60)/100] + [(162.79 × 15.79)/100] + [(163.92 × 53.61)/100]

= 48.77 + 25.70 + 87.88

= 162.35 amu

Therefore, the average atomic mass of element X is 162.35 amu

The charge on the cobalt ion in the salt CoO is ________.

Answers

Answer:

The charge of cobalt in the salt is + 2.

Explanation:

The charge of the salt = 0 . This is because it is neutral.

Charge of cobalt = ?

Charge of oxygen = -2 (This is a constant value, it is -2 only in peroxides)

Charge of salt = Charge of cobalt + Charge of oxygen

0 = x + (-2)

x = + 2

The charge of cobalt in the salt is + 2.

Can you answer both questions please??

Answers

The air we breathe is a mixture and for number 10th they are elements.

How many grams are there in 1.00x10 24 molecules of BCI3

Answers

Answer:

194.569 g

Explanation:

6.022×10^23 molecules = 117.17 g

1 molecules = 117.17/ 6.022×10^23

So, 1×10^24 molecules = (117.17×1×10^24)/(6.022×10^23)= 194.569 g

Suppose you are given samples of pentane, 2,2-dimethylpropane, 2-methylbutane and hexane. how you would go about determining which substance had the highest boiling point.​

Answers

Answer:

Addiction

Explanation:

Determine the equilibrium expression for the following reaction:
2NaHCO3(s)⇋Na2CO3(s)+H2O(g)+CO2(g)

Answers

Answer:

K = [Na2CO3] [H2O] [CO2] / [NaHCO3]²

Explanation:

2NaHCO3(s)⇋Na2CO3 (s) + H2O(g) + CO2(g)

To write an expression for equilibrium constant, K, for the above reaction, it is important that we have an idea of what equilibrium constant is all about and how we can determine it.

Equilibrium constant for a reaction is simply defined as the ratio of the concentration of the product raised to their coefficient to the concentration of the reactant raised to their coefficient.

Thus the expression for the equilibrium constant for the above equation can be written as follow:

K = [Na2CO3] [H2O] [CO2] / [NaHCO3]²

an element has atomic number and mass number 13 and 27 respectively. what are the number of electrons protons and neutrons in one atom of the element​

Answers

Answer:

the number of electrons is 13 and neutrons is 14

A diprotic acid, H₂A, has Ka1 = 3.4 × 10⁻⁴ and Ka2 = 6.7 × 10⁻⁹. What is the pH of a 0.18 M solution of H₂A?

Answers

Answer:

pH = 2.10

Explanation:

We name an acid as diprotic because it can release two protons:

H₂A  +  H₂O  ⇄  H₃O⁺   + HA⁻     Ka₁

HA⁻  +  H₂O  ⇄  H₃O⁺   + A⁻²      Ka₂

We propose the mass balance:

Analytical concentration = [H₂A] +  [HA⁻]  + [A⁻²]

As Ka₂ is so small, we avoid the [A⁻²] so:

0.18 M = [H₂A] +  [HA⁻]

But we can not avoid the HA⁻, because the Ka₁. Ka₁'s expression is:

Ka₁ = [H₃O⁺] . [HA⁻] / [H₂A]

We propose the charge balance:

[H₃O⁺] = [HA⁻] + [A⁻²] + [OH⁻]

As we did not consider the A⁻², we can miss the term and if

Kw = H⁺ . OH⁻

We replace Kw/H⁺ = OH⁻. So the new equation is:

[H₃O⁺] = [HA⁻] + Kw / [H₃O⁺]

The acid is so concentrated, so we can avoid the term with the Kw, so:

[H₃O⁺] = [HA⁻]

In the mass balance we would have:

0.18 M = [H₂A]

We replace at Ka₁

Ka₁ = [H₃O⁺] . [HA⁻] / [H₂A]

Ka1 . 0.18 / [H₃O⁺] = [HA⁻]

We replace at the charge balance:

[H₃O⁺] = Ka1 . 0.18 / [H₃O⁺]

[H₃O⁺]² = 3.4×10⁻⁴  . 0.18

[H₃O⁺] = √(3.4×10⁻⁴  . 0.18)

[H₃O⁺] = 7.82×10⁻³

- log [H₃O⁺] = pH → - log 7.82×10⁻³

pH = 2.10

Following are the calculation to the pH:

For First ionization:

[tex][H^+] = (K_{a1} \times C)^{\frac{1}{2}}[/tex]

where

C = initial concentration of acid [tex]= 0.18\ M[/tex]

[tex][H^{+}] = (3.4 \times 10^{-4} \times 0.18 \ M)^{\frac{1}{2}}\\[/tex]

[tex][H^{+}] = 0.007\ M[/tex]

For Second ionization:

[tex][H^{+}] = K_{a2} \\\\[/tex]

[tex][ H^{+} ] = 6.7 \times 10^{-9}\ M \\[/tex]

[tex]Total [H^{+}] = 0.007\ M + 6.7 \times 10^{-9}\ M\\\\Total [H^{+}] = 0.007 \ M[/tex]

[tex]pH = -\log[H^+] \\\\pH = -\log(0.007 \ M)\\\\pH = 2.15[/tex]

Therefore, the pH is "2.15".

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What is the volume of a sample of matter with a density of 6 and a mass of 6 cm3?

Answers

Answer:

We have the final answer as

1.0 cm³

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

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

From the question

mass = 6 g

density = 6 g/cm³

It's volume is

[tex]volume = \frac{6}{6} = 1 \\ [/tex]

We have the final answer as

1.0 cm³

Hope this helps you

5400 L to KL
With work??

Answers

Answer:

5.4KL

Explanation:

Divide by 1000

A decomposition occurs when you open a can or bottle of soda. Carbonic acid,H2CO3, is in carbonated beverages. It decomposes into carbon dioxide and water. If you leave an open soda can out for a long time, it loses its fizz. Which equation represents the balanced chemical equation for this reaction?

Answers

Answer:

H₂CO₃ (aq) → CO₂ (g) + H₂O (l)

Explanation:

Step 1: Write out unbalanced decomposition equation

H₂CO₃ (aq) → CO₂ (g) + H₂O (l)

Step 2: Balance equation

We see that we have 3 oxygens on both sides of the reaction.

We also see that we have 1 carbon on both sides of the reaction.

We also see that we have 2 hydrogens on both sides of the reaction.

Therefore, the chemical equation is balanced.

An octagonal pyramid ... how many faces are there, how many vertices and how many edges? A triangular prism ... how many faces are there, how many vertices and how many edges? a triangular pyramid ... how many faces are there, how many vertices and how many edges?​

Answers

Answer:

Hi Harshadvani!! These are the answers you need:

Octagonal Pyramid:

Faces - Eight (8)

Vertices - Nine (9)

Edges - Sixteen (16)

Triangular Prism:

Faces - Five (5)

Vertices - Three (3)

Edges - Eight (8)

Triangular Pyramid:

Faces - Four (4)

Vertices - Four (4)

Edges - Six (6)

Hope it helps!!

Thanks!!!☺✨

Answer:

hey there

An octagonal pyramid

8

9

16

A triangular prism

5

3

8

a triangular pyramid

4

4

6

need further explanation???

text me on the comments

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