An element is an arrangement of atoms in a particular way; True or False?

Answers

Answer 1

Answer:

i think it's true because An element is a substance that is made entirely from one type of atom


Related Questions

How does the arrangement of atoms differ in crystals and glass?

Answers

crystals have well organized arrangement of atoms. non crystals have irregular unorganized arrangement of atoms :)

How does the arrangement of atoms differ in a crystalline and a noncrystalline substance? Crystals have well organized arrangement of atoms. Non crystals have irregular unorganized arrangement of atoms. You just studied 13 terms!

How many m^3 are in 56cm^3?

Answers

Answer:

5.6 × 10-5 m^3

Explanation:

Hope this helps

Element T exists as three isotopes: T-12 (98.90%), T-13 (1.00%) and T-14 (0.10%). Calculate the
average atomic mass of the element T.
Answer choices:
- 12.01 amu
- 11.72 amu
- 1200 amu
- 13 amu

Answers

Answer:

-10.00amu

ok.......... !!!!!

The average atomic mass of the element T is 12.012 amu.

What is average atomic mass?

The average atomic mass is defined as the atoms' weighted average mass in a naturally occurring sample of the element.

It is also defined as the average atomic mass of all naturally occurring isotopes of all elements.

The average atomic mass  can be expressed as

Average atomic mass = f1m1 + f2m2 + f3m3

                                    = 0.989 x 12 + 0.01 x 13 + 0.001 x 14

                                    = 11.868 + 0.13 + 0.014

                                    = 12.012 amu

Thus, the average atomic mass of the element T is 12.012 amu.

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In the following atomic model, where does the strong nuclear force happen?

Answers

Answer:

the strong nuclear force happens in the neuclus

Which of the following statements is true about the arrangement of particles in matter?
B. The particles in aliquid are spread farther apart than the particles in a gas.
A. The particles in a gas are closer together than the particles in a liquid
D. The particles in a solid are spread farther apart than the particles in a liquid
C. The particles in a gas are spread farther apart than the partides in a solid

Answers

Answer:

C. The particles in a gas are spread farther apart than the particles in a solid

Explanation:

Solids are made up of tightly-packed particles that form a rigid shape. Liquids are comprised of loosely connected particles that can slightly move. Gases are made up of fast-moving disconnected particles that are spread far apart.

3 points
What is the energy (Joules) of violet light with a frequency = 3.43 x 10^14
1/s? *
4.54x10^-19 J
1.99x10^-25 J
1.93 x 10^-48 J
O 2.27 x 10^-19 J
Pls help me

Answers

Answer:

4.54x10^-19 J

1.99x10^-25 J

1.93 x 10^-48 J

You heat 51 grams of magnesium over a Bunsen burner for several minutes until it reacts with oxygen in the air. Then you weigh the resulting product and see that it is now 53 grams. How does this happen without breaking the Law of Conservation of Mass?

Answers

Answer:

    The mass was there all along, it was just in the air. The weight of the oxygen from the air is not weighed in the beginning, only at the end as part of the product, making it seem like there is a total mass change.

Which of the following isotopes are NMR inactive?
a. 1H
b. 12C
c. 15N
d. 16o
e. 19F
f. 31P

Answers

Answer:

12C and 16O

Explanation:

Here, we want to select which of the options are NMR inactive. For an isotope to be NMR inactive, then the net nuclear spin is zero.

What this means is that the number of proton present coupled with the number of neutrons are an even number pair.

What we are saying here is that the number of protons is an even number while the number of neutrons too is an even number. So the net nuclear spin in this case is zero.

in the case of oxygen, we have 8 protons and 8 neutrons. This makes the nuclear spin zero and consequently makes the isotope NMR inactive.

Same is in the case of carbon. There are 6 protons and 6 neutrons and this also makes nuclear spin zero .

In all the other isotopes in the question, we have odd number even number or even number odd number pairs of protons and neutrons.

what would happen to the solvent if a reaction was refluxed without a condenser​

Answers

Answer:

Solvent will be lost as gas and not return into the vessel via condensation.

Explanation:

Reflux is a technique used in chemistry to boil a particular solvent and convert the gas formed back into liquid by condensation. This technique allows a solvent to be heated at a regulated temperature but for a prolonged period of time than it would normally take place.

The reflux procedure makes use of a reflux CONDENSER, which is an apparatus that allows vapour from the heating/boiling to flow back into the reaction vessel. The CONDENSER functions to prevent the loss of the SOLVENT as vapour by providing a cooling effect on the vapour.

Therefore, if a reaction was refluxed without a condenser, THE SOLVENT WILL BE LOST AS VAPOUR

You left a glass full of water by a window in your house in the morning. Three hours later you walk by the glass, and the water level is significantly lower than it was in the morning. You have made the observation that the water level in the cup is lower. Then, you ask the following question: “Why is the water level in the cup lower?” What is a possible hypothesis you could make?

Answers

“If a glass of full water is placed by a window and 3 hours go by, then the water in the cup will be lower because the water will evaporate.”

Explain why some people use the term decimal system as a synonym for the metric system?

Answers

Answer:

The term Decimal is coined from the word Decimus. Decimus is a Latin word which means ‘tenth’.

The Decimal system is a system of numbering that is based on multiples of tens. It is flexible and easy to convert from one metric to another.

The preference of the term over the Metric System is because the word Metric is related more to the measurement of lengths if we looked at the origin of the word which is French.

Cheers!  

If a horse is at a stop and then starts running is the horse accelerating or decelerating?

Answers

Answer:

accelerating

Explanation:

technically, there is no such thing as deceleration, just negative acceleration.

The horse is accelerating.

Determine the number of mm in 14.3cm

Answers

Answer:

143 mm . covert it an determine an individual percentage .

PLEASE HELP ME, I HAVE NO IDEA HOW TO DO THIS :(

Answers

Lol . same here. If u get any ideas please let me know

Answer:

See the picture you have to write like this

Consider the following balanced equation:3Ca(NO3)2(aq) + 2Na3PO4(aq) → Ca3(PO4)2(s) + 6NaNO3(aq)If 24.2 moles of Na3PO4(aq) reacts with an excess of Ca(NO3)2(aq) to produce 50.6 moles of NaNO3(aq), what is the percent yield of the reaction?

Answers

Answer:

69.7% is percent yield

Explanation:

Based on the reaction:

3Ca(NO3)2(aq) + 2Na3PO4(aq) → Ca3(PO4)2(s) + 6NaNO3(aq)

2 moles of Na3PO4 react producing 6 moles of NaNO3.

As 24.2 moles of Na3PO4 react, theoretical moles of NaNO3 produced are:

24.2 moles Na3PO4 * (6 moles NaNO3 / 2 moles Na3PO4) =

72.6 moles of NaNO3

As there are produced 50.6 moles of NaNO3, percent yield is:

50.6 moles NaNO3 / 72.6 moles NaNO3 =

69.7% is percent yield

Which common item is made from copper?

soap
coins
baby powder
colored pencils

Answers

Coins just like pennies

Answer:

coins

Explanation:

(01.04 LC)
What phase of matter has particles that are held together but can flow past each
other and takes the shape of a container, filling it from the bottom up? (3 points)
1) Gas
2) Liquid
3) Plasma
4) Solid

Answers

the answer is liquid ! hope this helped :)

Use the clues you highlighted to choose the best
meaning of beat in this sentence.
Highlight the context clues that help you choose
the best meaning of the word beat.
Our family beat a retreat back to the sofa as if chased by
enemy soldiers
- "The All-American Slurp."
Lensey Namioka
O defeated
O mixed
hurried
musical rhythm

Answers

Answer:

hurried

Explanation:

because they retreated back to the couch so hurried.

Answer:

c

Explanation:

You estimate that you sent 135 texts last week but when you get the bill, it was actually 175. Calculate the percent error

Answers

Answer: -40

Explanation: Percent error is calculated by subtracting the value you actually recieved from the literature value (175 in your case)  SO your answer should be 135-175=-40.

Which solution has the lower freezing point in each of the following pairs? (a) 11.0 g of CH3OH in 100. g of H2O or 22.0 g of CH3CH2OH in 200. g of H2O? CH3OH/H2O CH3CH2OH/H2O Both solutions have the same freezing point. (b) 20.0 g of H2O in 1.00 kg of CH3OH or 20.0 g of CH3CH2OH in 1.00 kg of CH3OH? H2O/CH3OH CH3CH2OH/CH3OH Both solutions have the same freezing point.

Answers

Answer:

See explanation

Explanation:

(a)

From the data provided;

Mass of methanol =11.0 g

Mass of solvent (H2O) =100 g = 0.1 kg

Molar mass of CH3OH =32.04 g/mol

Number of moles of solute = 0.343 mol

molality(m) of methanol = 3.43 m

Also,

Mass of ethanol =22.0 g

Mass of solvent (H2O) =200 g = 0.2 kg

Molar mass of C2H5OH =46.068 g/mol

Number of moles of solute = 0.477 mol

molality(m) of ethanol= 2.38 m

The greater the concentration of a solution, the higher the freezing point of solvent will be depressed. Therefore, higher molality, leader to a greater decrease of the freezing point.

Therefore, the freezing point of methanol CH3OH/H2O is lower than the freezing point of ethanol.

b)

Mass of solvent = 1 kg

Mass of water = 20g or 0.02 Kg

Molar mass of water = 18 gmol-1

Number of moles of solute = 20g/18 gmol-1 = 1.11 moles

Molality= 1.11 moles/1 kg = 1.11 m

Also;

Mass of ethanol = 20 g = 0.02 kg

Mass of solvent = 1.00 Kg

Molar mass of solute = 46 gmol-1

Number of moles of solute = 20g/ 46 gmol-1 = 0.43 moles

Molality= 0.43 moles/ 1 kg = 0.43 m

The greater the concentration of a solution, the higher the freezing point of solvent will be depressed. Therefore, higher molality, leader to a greater decrease of the freezing point.

Therefore, the freezing point of water H2O/CH3OH is lower than the freezing point of ethanol.

Determine the number of protons (p) and electrons (e) in Mg2.
A) 10 p, 12 e
B) 12 p, 12 e
C) 12 p. 10 e
D) 12 p. 14 e
E) 10 p, 10 e

Answers

C) 12protons 10 electrons

Look at the list of wealthy Americans under the heading “Half a Billion Back of M'Kinley."
What were the two most common industries of the business leaders on
this list?
manufacturing and carpets
banking and railroads
o jewelry and transportation

Answers

Answer:

banking and railroads

Explanation:

The  two most common industries of the business leaders on this list are banking and railroads.

What are industries?

Industry is a group of productive enterprises or organizations that produce or supply goods, services, or sources of income. In economics, industries are generally classified as primary, secondary, tertiary, and quaternary; secondary industries are further classified as heavy and light.

Primary industry sector of a nation’s economy includes agriculture, forestry, fishing, mining, quarrying, and the extraction of minerals. It may be divided into two categories: genetic industry, including the production of raw materials that may be increased by human intervention in the production process; and extractive industry, including the production of exhaustible raw materials that cannot be augmented through cultivation.

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A running track measures 1056 ft per lap. To run 15.0 km, how many laps should you run?

Answers

Answer:

46.6 laps

Explanation:

Step 1: Given data

Length of the lap (l): 1056 ftTotal distance to be run (d): 15.0 km

Step 2: Convert "l" to km

We will use the conversion factor 1 km = 3280.84 ft.

1056 ft × (1 km / 3280.84 ft) = 0.3219 km

Step 3: Calculate the number of laps that you should run

We will use the following expression.

laps = d/l

laps = 15.0 km/(0.3219 km/lap)

laps = 46.6 laps

how do you tell if an chemical eqaution is unbalanced

Answers

A balanced equation is an equation in which the number of atoms of all the molecules is equal on both sides of the equation is known as a balanced chemical equation. Law of conservation of mass governs the balancing of a chemical equation.
-byjus.com
The way you can tell if an equation is unbalanced is by looking at the number of atoms in each formula on each side

Ex: Cu + Cl -> CuCl2 = unbalanced
Cu + 2Cl -> CuCl2 = balanced

Miss White wants to make a (decidedly not poisoned) apple pie. The recipe she is
using asks for a specific mass of apples, but Miss White doesn't have a balance, so
finding mass directly will be difficult. What she DOES have is a graduated cylinder,
which she uses to find that her apples have a volume of 786,3 ml. She also knows
that her apples have a density of around 0.98 g/ml. What is the mass of Miss
White's apples? Please round your answer to 0.01 grams.

Answers

So you have to multiply 786,3 times 0.98 to get the mass the mass is 770.57 if u round its 770.6 or 771

Using the mmoles of (35)-2,2,-dibromo-3,4-dimethylpentane calculated earlier and the molecular weight of the product (962 g/mol). Predict the theoretical 1 0096 yield of the product in grams. Round to the hundredths place.

Answers

Answer:

The yield of the product in gram is [tex]\mathsf{{w_P}=0.26 \ gram}[/tex]

Explanation:

Given that:

the molecular mass weight of the product = 96.2 g/mol

the molecular mass of the reagent (3S)-2,2,-dibromo-3,4-dimethylpentane is 257.997 g

given that the millimoles of the reagent = 2,7 millimoles = [tex]2.7 \times 10^{-3} \ moles[/tex]

We know that:

Number of moles = mass/molar mass

Then:

[tex]2.7 \times 10^{-3} = \dfrac{ mass}{257.997}[/tex]

[tex]mass = 2.7 \times 10^{-3} \times 257.997[/tex]

mass = 0.697

Theoretical yield = (number of moles of the product/ number of moles of reactant) × 100

i.e

Theoretical yield = [tex]\dfrac{n_P}{n_R}\times 100\%[/tex]

where;

[tex]n_P = \dfrac{w_P}{m_P}[/tex]    and [tex]n_R = \dfrac{w_R}{m_R}[/tex]

Theoretical yield = [tex]\dfrac{(\dfrac{w_P}{m_P})}{(\dfrac{w_R}{m_R})} \times 100\%[/tex]

Given that the theoretical yield = 100%

Then:

[tex]100\% =\dfrac{(\dfrac{w_P}{m_P})}{(\dfrac{w_R}{m_R})} \times 100\%[/tex]

[tex]\dfrac{w_P}{m_P}=\dfrac{w_R}{m_R}[/tex]

[tex]{w_P}=\dfrac{w_R \times m_P}{m_R}[/tex]

where,

[tex]w_P[/tex] = derived weight of the product

[tex]m_P =[/tex]the molecular mass of the derived product

[tex]m_R =[/tex] the molecular mass of the reagent

[tex]w_R[/tex] = weight in a gram of the reagent

[tex]{w_P}=\dfrac{w_R \times m_P}{m_R}[/tex]

[tex]{w_P}=\dfrac{0.697 \times 96.2}{257.997}[/tex]

[tex]\mathsf{{w_P}=0.26 \ gram}[/tex]

how do isotope of the same element differ?

Answers

Answer:

isotope of the same element differ

Explanation:

isotope is one of two or more forms of the same chemical element. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number.

Which of the following would be a good solvent choice when preparing your sample for 1H NMR?
a. CD2C12
b. СНЗОН
c. More than one of the answer choices
d. CH2C12
e. None of the answer choices
f. CD3OD

Answers

Answer:

e. None of the answer choices

Explanation:

The solvents used for 1HNMR analysis are chloroform D (CDCl3), and acetone D6 (CD3COCD3) and deuterium oxide (D2O). And here any of these three nans are listed in the given option so that we can say that none of the answers are correct. so correct answer is e. None of the answer choices

Which best justifies the accuracy of the claim?

Answers

Answer:

A

Explanation:

the 2nd artical is against global warming while the first one uses scientific evidence

Not divisible
O atom
O compound
O mixture
O solution

Answers

Answer:

mixture or atom

Explanation:

I HOPE IT WILL HELP YOU

Explanation:

and ,answer is mixture.

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