Need help ASAP!!!!!!

Need Help ASAP!!!!!!

Answers

Answer 1

Answer:

option D 17proton ,17electron and 18 neutrons


Related Questions

What does Bromine-80 decays by beta decay to?



Answers

Answer:

beta to Kr-80 or Se-80

Explanation:

sorry if wrong

Which element is shown below? How do you know?

Answers

It’s Neon (Ne). You know because there are 10 protons and the number of protons is equal to the atomic number of an element. (Neon is #10 on the periodic table)

Make a atomic model of carbon-12 in mine craft

(If it's good I'll give a lot of points)

Answers

Here is the atomic model in the picture.

When vectors are added or subtracted, the net force is called the _____.

will give brainliest to whoever gets it right

Answers

Answer:

resultant

Explanation:

How is the atomic mass of an element related to a mole?
O A. The atomic mass, in grams, is the mass of 6.02 x 1023 moles.
O B. The atomic mass, in grams, is the mass of 6.02 x 1023 electrons.
O C. The atomic mass, in grams, is the mass of one mole of atoms.
O D. The atomic mass, in grams, is the mass of one mole of protons.

Answers

Answer:

i the answer to your question should be C

Explanation:

Hope this helps!

The atomic mass of an element related to a mole in grams, is the mass of one mole of atoms. Therefore, option C is correct.

What is an atomic mass ?

An atom's mass is its atomic mass. Although the kilogramme is the SI measure of mass, the unified atomic mass unit, or dalton, is a common way to express atomic mass. An unbound carbon-12 atom in its ground state has a mass of 112 of a Da.

A mass that is one-twelfth the mass of an atom of carbon-12 is known as an atomic mass unit. Any isotope of any element's mass is represented in terms of the carbon-12 reference standard.

The size of an atom is indicated by its atomic mass. Technically speaking, an atom's mass is the total weight of its protons, neutrons, and electrons.

Thus, option C is correct.

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need little help pls

Answers

Answer:

0.354 molal

Explanation:

The molarity (M) or the concentration of a solution is defined as the number of moles of a compound in the solution per liter of solution (mol/L), whereas molality, is defined as the number of moles of a compound in the solution per kg of the compound (mol/kg).

Given that the density of the solution is 1.202 g/mL, which is equivalent to 1.202 kg/L. Since the prefix mili- denotes a factor of one thousandth ( [tex]10^{-3}[/tex] ) and kilo- denotes a factor of one thousand ( [tex]{10}^3[/tex] ),

[tex]1.202 \ \frac{g}{mL} \ = \ 1.202 \ \frac{g}{(10^{-3}) L} \ = \ 1.202 \ \frac{{10}^3g}{L} \ = \ 1.202 \ \frac{kg}{L}[/tex].

To calculate the corresponding molality of the solution, the formula

[tex]Molality \ (mol/kg) \ = \ \frac{Molarity \ (mol/L)}{Density \ (kg/L)}[/tex] is used.

Therefore,

[tex]Molality \ = \ \frac{0.426 \ mol/L}{1.202 \ kg/L} \ = \ 0.354 \ mol/kg \ \ (3 \ s.f.)[/tex]

What is the required mass to prepare a 0.5M potassium chloride solution using 250mL of water

Answers

Molarity - It is defined as number of moles of solute in the given solution.

Molarity = number of moles / Volume of solution

moles = mass / molecular weight

Molecular weight of KCl =( K-39) + (Cl -35.5) = 74.5 g/mole

Volume of soultion = 250 mL = 0.25L

Molarity = 0.5 M

Now ,

Molarity = number of moles / volume of solution

= Mass of KCl / molecular weight of KCl × Volume

0.5 = Mass of KCl / 74.5 × 0.25

Mass of KCl = 0.5 × 74.5 × 0.25 = 9.3125 grams

Hence the mass of KCl required is 9.3125 grams.

13. Which has the largest atomic radius?
A. fluorine B. chlorine C. bromine
D. a bromine anion with a charge of 1-

Answers

Answer:

bromine

Explanation:

How many moles are in 50 g of CO2

Answers

Answer:

1.1 mol

Explanation:

n=m/M, where n is moles, m is mass, and M is molar mass.

M of CO2 = 12.01+16.00+16.00 = 44.01g/mol

n=50g/44.01g/mol

n = 1.13610543 mol

n ≈ 1.1 mol

Hope that helps

How many theoretical plates produce a chromatography peak eluting at 12.83 min with a width at half-height of 8.7 s

Answers

Answer-Figure P38.63a
is a three-dimensional sketch of a birefringent crystal. The dotted lines illustrate how a thin, parallefaced slab of material could be cut from the larger specimen with the crystal’s optic axis parallel to the faces of the plate.”


Sorry if it’s it correct

How many K are in 32 o C?

Answers

Answer:

273.15 Kelvins

Explanation:

Hope this helps !!!

If you add the same amount of heat to two different substances, will they both change phase?

Answers

Answer:

It depends on their melting and/or their boiling points, because the heat provides the particles with kinetic energy to break the electrosatic bonds in the substances, which can differ in strength

Explanation:

Which element(s) would you expect to behave similarly to Gadolinium? What properties of would you expect to be the same, what would be different?

Answers

The elements in the lanthanide series are similar to gadolinium.

The periodic table is arranged in groups and periods. Elements in the same group have similar properties. At the bottom row of the periodic table lies a group of elements that have unique properties called the lanthanides. This is where Gadolinium belongs.

The elements in the lanthanide series such as europium and terbium are similar to gadolinium. The lanthanides are similar in chemical reactivity and appearance. However, the density of the metals differ because it increases with increase in atomic number.

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How is a mixture different from a compound?

Answers

Answer:

A compound is something like atoms coming together as a team, and a mixture is 2 or more substances mixing together.

Explanation:

I think a compound is something that is permanently together and a mixture is something you mix yourself ❤️

Heart, 5 stars, Brainiest, and 40 coins if right! Answer needed ASAP

Which statement describes what happens when Bret runs up a flight of stairs?
A. His kinetic energy is destroyed.
B. His potential energy decreases.
C. His kinetic energy is converted into potential energy.
D. His potential energy is converted into kinetic energy.

Answers

Answer:

His kinetic energy is converted into potential energy.

Explanation:

Nitric oxide (NO) from car exhaust is a primary air pollutant. Calculate the equilibrium constant for the reaction
N2(g) + O2(g) equilibrium reaction arrow 2 NO(g)
at 25°C using the data listed in the supporting materials.


Calculate the equilibrium constant at 1496°C, which is a typical temperature inside the cylinders of a car's engine after it has been running for some time. (Assume that both ΔrH° and ΔrS° are temperature independent.)

Answers

This problem is asking for the equilibrium constant at two different temperatures by describing the chemical equilibrium between gaseous nitrogen, oxygen and nitrogen monoxide at 25 °C and 1496 °C as the room temperature and the typical temperature inside the cylinders of a car's engine respectively:

N₂(g) + O₂(g) ⇄ 2 NO(g)

Thus, the calculated equilibrium constants turned out to be 6.19x10⁻³¹ and 9.87x10⁻⁵ at the aforementioned temperatures, respectively, according to the following work:

There is a relationship between the Gibbs free energy, enthalpy and entropy of the reaction, which leads to the equilibrium constant as shown below:

[tex]\Delta _rG=\Delta _rH-T\Delta _rS\\\\\Delta _rG=-RT ln(K)[/tex]

Which means we can calculate the enthalpy and entropy of reaction and subsequently the Gibbs free energy and equilibrium constant. In such a way, we calculate these two as follows, according to the enthalpies of formation and standard entropies of N₂(g), O₂(g) and NO(g) since these are assumed constant along the temperature range:

[tex]\Delta _rH=2*90.25 kJ/mol - (0 kJ/mol+0 kJ/mol)=180.5kJ/mol\\\\\Delta _rS=2*(0.211 kJ/mol*K)-(0.192kJ/mol*K+0.205kJ/mol*K)=0.025kJ/mol*K[/tex]

Then, we calculate the Gibbs free energy of reaction at both 25 °C and 1496 °C:

[tex]\Delta _rG_{25\°C}=180.5-(25+298.15)*0.025=172.42kJ/mol\\\\\Delta _rG_{1496\°C}=180.5-(1496+298.15)*0.025=135.65kJ/mol[/tex]

And finally, the equilibrium constants derived from the general Gibbs equation and Gibbs free energies of reaction:

[tex]K=exp(-\frac{\Delta _rG}{RT} )\\\\K_{25\°C}=exp[-\frac{172420 J/mol}{(8.3145\frac{J}{mol*K})(298.15K)} ]=6.19x10^{-31}\\\\K_{1496\°C}=exp[-\frac{135650J/mol}{(8.3145\frac{J}{mol*K})(1769K)} ]=9.87x10^{-5}[/tex]

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How many moles in 44.7 kg of carbon dioxide

Answers

Answer:

What is the number of moles of carbon present in 44 grams of carbon dioxide? One. 44 grams is a mole of carbon dioxide and there is one carbon atom in CO 2 so there is one mole of carbon. That’s how chemistry works.

Explanation:

What is the number of moles of carbon present in 44 grams of carbon dioxide? One. 44 grams is a mole of carbon dioxide and there is one carbon atom in CO 2 so there is one mole of carbon. That’s how chemistry works.

Why was the war in Peru difficult?

Answers

Answer:

in contrast, peru and Bolivia entered the war hindered by numerous domestic fractures and by an economic and insititutional backwardness that nearly prevented the two countries from fighting the war at all

How do plants use the energy from the sunlight?

Answers

Answer:

Hey mate....

Explanation:

This is ur answer....

Plants use a process called photosynthesis to make food. During photosynthesis, plants trap light energy with their leaves. Plants use the energy of the sun to change water and carbon dioxide into a sugar called glucose. Starch is stored in seeds and other plant parts as a food source.

Hope it helps!

Brainliest pls!

Follow me! :)

Answer:

Plants use photosynthesis to convert sun light into their own food to consume. Green plants use this light energy to change water and carbon dioxide into oxygen and nutrients called sugars. The plants use some of the sugars and store the rest. The oxygen is released into the air.

The ion of aluminum is

Al+

Al2-


Al2+


Al3+


Al3-

Answers

Answer:

A13+

Explanation:

I took a test that had this question.

pa help po science po​​

Answers

Answer:

1. molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere

2. A

3. D

4. C

5. C

6. C

7. C

8. B

9. Sorry I don't know :(

10. B

11. A

12. C

13. Sorry :((

14. C

15. a

16. d

Sorry I don't know the rest.. I hope this helps though!!

I figured it out no problem

Answers

Answer:

good job ;0

Explanation:

Thank you kind sir your a god beyond my eyes

I need the skeleton equation for the following sentence!

Carbon dioxide gas and solid calcium oxide are produced in the decomposition of solid calcium carbonate.

Answers

Answer:

A. CaCO(s)+SO(g)+O(g) --> CaSO(s)+CO(g)

A. CaCO(s)+SO(g)+O(g) --> CaSO(s)+CO(g)

if one gram of sulphur dioxide contains x molecules what will be the number of molecules in 1g of methane

Answers

The ratio of molecules in sulphur dioxide and methane will be the same as the ratio of their moles. So, first of all we should find out the number of moles of sulphur dioxide in 1 gram of sulphur dioxide in 1 gram of sulphur dioxide, and the number of moles of methane in 1 gram of methane. This can be done as follows :

(i) The molecular formula of sulphur dioxide is [tex]SO_{2}[/tex]

So, [tex]1[/tex]  mole of [tex]SO_{2}[/tex] = [tex]Mass[/tex] [tex]of[/tex] [tex]2'O'[/tex]

[tex]=32+2*16[/tex]

[tex]= 64[/tex] grams

Now, [tex]64g[/tex] of sulphur dioxide [tex]= 1[/tex] mole

So, [tex]1g[/tex] of sulphur dioxide = [tex]\frac{1}{64}[/tex] mole

Thus, we have [tex]\frac{1}{64}[/tex] mole of sulphur dioxide and it contains molecules in it. Now, since equal moles of all the substance contain equal number of molecules, therefore, [tex]\frac{1}{64}[/tex] mole of methane will also contain x molecules of methane.

(ii) Molecular formula of methan is [tex]CH_{4}[/tex]

So, 1 mole of [tex]CH_{4}[/tex]  = Mass of C + Mass of 4 H

[tex]=12+4*12[/tex]

Now, 16g of methane = 1 mole

So, 1 g of mathane = [tex]\frac{1}{16}[/tex] mole

We know that:

[tex]\frac{1}{64}[/tex] mole of methane contains = x molecules

So, [tex]\frac{1}{16}[/tex]  mole of contains will contain =[tex]\frac{x*64}{16}[/tex] molecules

=[tex]4x[/tex] molecules

The density of crystalline cl2 at 160K is 2.02g/cm3. calculate the molar volumes

Answers

molar volumes of the density of crystalline is 60

The molar volume (Vm) is the volume occupied by one mole of a chemical element or chemical compound at standard temperature and pressure (STP). The molar volume of Cl₂ is 35.10 cm³/mol.

One mole of any gas has a defined volume when it is at a particular temperature and pressure. The relationship between molar mass and molar volume is direct and inverse, respectively.

Two gases have equal molecules if their volumes are the same at a given temperature and pressure. A gas's volume is directly proportional to the number of moles it contains. One mole of any gas takes up 22.4 L of space at STP.

The expression used to calculate molar volume is:

Molar volume = Molar mass / Density

The molar mass of Cl₂ = 70.906 g/mol

Molar volume = 70.906 / 2.02

Molar volume = 35.10 cm³/mol

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Producers are the most numerous group in an ecosystem. Why?
-------------------------------------------------------------------------------------------------
Producers produce food energy for themselves and all the other levels. ⬜

Soil and temperature conditions in an ecosystem always favor producers. ⬜

As energy flows through the ecosystem, some energy is added at each step. ⬜

There is more room for small organisms than there is for large ones. ⬜

Answers

Answer:

The primary producer uses some of that energy. Because we lose energy each time we move up a trophic level, we have more producers than consumers, more herbivores than carnivores, more primary consumers than secondary consumers. See this Socratic answer for more detail.

Explanation:

Answer:

Producers produce food energy for themselves and all the other levels

Explanation:

Nitrogen H2 has :

a)Double bonds

b)Bounded by 6 electrons

c) The bond is ionic

d) Can forms der Waals bonds

e) B& d​

Answers

Answer:

the bond is ionic

Explanation:

what is the element found in all living matter.

Answers

Answer:

There are four elements that are found in all living animals, that are:

Oxygen (O)

Carbon (C)

Hydrogen (H)

Nitrogen (N).



How much heat must be added to a 8.21 g sample of gold to increase its temperature from the tempe
75.3°C to 83.1°C? The specific heat of gold is 0.13 J/gºC

Answers

Answer:

Q= ms∆T

Where, m is mass of substance

S is specific heat

∆T is temperature change

As in question , m=8.21 ,s=0.13 ,∆T =6.2

So, Q = 8.21×0.13×6.2=6.61 J

Consider a box divided in half. One side is filled with 1 mol Ne at 300. Kelvin, and the other is filled with 1 mol Rn at 300. Kelvin. A small hole is opened in the divider between the sides, allowing the gases to mix. Suppose it takes 4.0 minutes for the Rn pressure to equilibrate between the two sides. How long (min) will it take the Ne pressure to equilibrate? Enter your answer to 1 decimal place.

Answers

It will take the Ne gas approximately 1.2 s to equilibrate between the two sides.

We know that the time taken for a gas to diffuse is dependent on the molar mass of the gas. This is one of the interpretations of Graham's law of diffusion in gases. Thus, Let;

t1 = time taken for Rn to equilibrate = 4.0 s

t2 = time taken for Ne to equilibrate = ?

M1 = molar mass of Rn = 222g/mol

M2 = molar mass of Ne = 20 g/mol

Using

t1/t2 = √M1/M2

4/t2 = √222/20

4/t2 = 3.33

t2 = 4/3.33

t2 = 1.2 seconds

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Which of the following could be a reasonable estimate forthe distance between her house and the hospital?O 1.7 x 102 metersO 1.8 x 103 metersO 1.7 x 10-3 metersO 1.8 x 10-2 meters 1 Answer: Can function as a main verb; formed by adding -ing to the base verb a. present participle c. gerund b. past participle d. infinitive2 Answer: Formed with the word TO together with a base verb a. present participle c. gerund b. past participle d. infinitive3 Answer: Functions as a noun; formed by adding -ing to the base verb a. present participle c. gerund b. past participle d. infinitive4 Answer: Can function as an adjective; usually formed by adding -ed to the base verb a. present participle c. gerund b. past participle d. infinitive5 Answer: Select the letter of the term in the following list that identifies the underlined word or words in the sentence: Some tourists enjoy sketching foreign scenes. a. present participle c. gerund b. past participle d. infinitive6 Answer: Select the letter of the term in the following list that identifies the underlined word or words in the sentence: Matthew got out his canvas and oils and got ready to paint. a. present participle c. gerund b. past participle d. infinitive7 Answer: Select the letter of the term in the following list that identifies the underlined word or words in the sentence: Painting can be a relaxing hobby. a. present participle c. gerund b. past participle d. infinitive8 Answer: Select the letter of the term in the following list that identifies the underlined word or words in the sentence: The swaying motion of the trees was hard to suggest on canvas. a. present participle c. gerund b. past participle d. infinitive9 Answer: Select the letter of the term in the following list that identifies the underlined word or words in the sentence: Dabbing paint onto his brush, the artist set to work on a new painting. a. present participle c. gerund b. past participle d. infinitive10 Answer: Select the letter of the term in the following list that identifies the underlined word or words in the sentence: Overwhelmed, Micaela stared at the beautiful portrait. a. present participle c. gerund b. past participle d. infinitive11 Answer: Select the letter of the term in the following list that identifies the underlined word or words in the sentence: This watercolor, completed in 1924, is exceptionally well done. a. present participle c. gerund b. past participle d. infinitive12 Answer: Select the letter of the term that identifies each underlined phrase: The statue erected here honors a former mayor of the city. a. participial phrase c. infinitive phrase b. gerund phrase d. prepositional phrase13 Answer: Select the letter of the term that identifies each underlined phrase: Sculpting in stone requires skill and patience. a. participial phrase c. infinitive phrase b. gerund phrase d. prepositional phrase14 Answer: Select the letter of the term that identifies each underlined phrase: That sculptor has donated much of his work to the museum. a. participial phrase c. infinitive phrase b. gerund phrase d. prepositional phrase15 Answer: Select the letter of the term that identifies each underlined phrase: To see the famous statues of Italy has always been one of Gil's dreams. a. participial phrase c. infinitive phrase b. gerund phrase d. prepositional phrase16 Answer: Select the letter of the term that identifies each underlined phrase: This statue, made of marble, was sculpted by the great Michelangelo. a. participial phrase c. infinitive phrase b. gerund phrase d. prepositional phrase17 Answer: Select the letter of the term that identifies each underlined phrase: Our fine arts instructor very much enjoys teaching us about sculpture. a. participial phrase c. infinitive phrase b. gerund phrase d. prepositional phrase18 Answer: Select the letter of the term that identifies how the underlined word or phrase functions in the sentence: Those women are hooking rugs with complex designs. a. subject c. adjective b. direct object d. part of a verb phrase19 Answer: Select the letter of the term that identifies how the underlined word or phrase functions in the sentence: Dyeing the yarn for the rugs is a tedious and messy process. a. subject c. adjective b. direct object d. part of a verb phrase20 Answer: Select the letter of the term that identifies how the underlined word or phrase functions in the sentence: Abdul wants to show us his antique rugs. a. subject c. adjective b. direct object d. part of a verb phrase Ten minus three tenths of n One major change brought on by the internet is targeting ads that are generated bywhat consumers search for online.TrueFalse Background information: This passage is from a testimony before a House of Representatives committee. China has invested heavily in new technologies. . . . Russia has shown that it is not afraid to target the United States in contested domains like cyberspace and still shows a continued interest in regional hegemony [dominance]. Iran continues to advance its nuclear and ballistic missile programs and to support destabilizing proxy groups in the Middle East in an effort to threaten its regional neighbors. We also face challenges from North Korea, a country with the ambition to be capable of striking the U. S. Homeland. "US Secretary of Defense Lloyd Austin, May 27, 2021 Which statement best summarizes the passage? The US faces multiple national security threats. The US military needs to invest in new technologies. China and Russia feel threatened by Iran and North Korea. Iran and North Korea are not considered national security threats. 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