Chemistry High School

There are seventeen key nutrients essential for bone health. The ideal intake of calcium is approximately 1.75 g per day. How many atoms of calcium is this?

Answers

Answer 1

Answer:

2.63×10²² atoms

Explanation:

From the question given above, the following data were obtained:

Mass of calcium (Ca) = 1.75 g

Number of atoms of calcium (Ca) =?

From Avogadro's hypothesis,

1 mole of Ca = 6.02×10²³ atoms

Recall:

1 mole of Ca = 40 g

Thus,

40 g of Ca = 6.02×10²³ atoms

Finally, we shall determine the number atoms in 1.75 g of calcium. This can be obtained as follow:

From Avogadro's hypothesis,

40 g of Ca = 6.02×10²³ atoms

Therefore,

1.75 g of Ca = 1.75 × 6.02×10²³ / 40

1.75 g of Ca = 2.63×10²² atoms

Thus, 1.75 g of Ca contains 2.63×10²² atoms.

Related Questions

I need help ASAP please
I will give thanks with Brainlist for correct answer

True or false
(Question on the pic)

Answers

Plastic rod and cloth

Answer:

yes true

Explanation:

based off my common sense as if you were to rub your hands together to warm up, it creates friction creating heat

How many Liters are in 3 grams of O2? *

Answers

That would be 48 grams I believe.

The equation for the synthesis of water is given below.
2
H
2
+
O
2
→
2
H
2
O

How many grams of oxygen gas are needed to produce 36.0 grams of water?

Answers

Answer:

32g grams of oxygen gas is needed to produce 36.0 grams of water

Areas in Mexico and Central America are known as

Answers

They are known as “American Central”

It is known as Mesoamerica.

Which of the following describes wind direction?

How fast the wind is moving
Where the wind is coming from
How strong the wind is
Where the wind is going

Answers

Answer:

where the wind is going

Explanation:

direction is where something is going hope it helps

Answer: number 4 Where the wind is going

Explanation:hope this helps u

Contrast the way the conqueror comes with the way the Pilgrims came (stanzas three and four).

Answers

Answer:

tbh id k i've never read it so if u could send the link I could help you.

Explanation:

HELLP PLEASE
_ Na+Cl 2 -> _NaCl
reactant side number of atoms?
Na = ?
Cl = ?
Product side number of atoms?
Na = ?
Cl = ?
what is the final equation?
_ Na+Cl 2 -> _NaCl

Answers

Answer:

2Na+Cl2 -> 2NaCl

Explanation:

1Na+1Cl 2 -> 1NaCl (i'm assuming they want you to balance it so ill start with 1)

Na = 1

Cl = 2 (it is 2 because it is Cl2, meaning that there are 2; but remember that you cannot change this number only coefficients)

Na = 1

Cl = 1

We need to have 2 Cl on the product side

1Na+1Cl 2 -> 2NaCl

Now we need 2 Na on the reactants side

The final equation is

2Na+Cl2 -> 2NaCl

Now it is balanced

Na = 2

Cl = 2

Na = 2

Cl = 2

Al(s) + NiSO4(aq)
Balance

Answers

Answer:

[tex]2Al(s) + 3NiSO4 --> Al2(SO4)3 + 3Ni[/tex]

Explanation:

This reaction type is a single replacement. The format of a single replacement is:

[tex]A+BC --> B+AC[/tex]

A= Al

B= Ni

C= SO

The coefficient 3 for Ni would become a subscript for AC. After you plug those into the reaction you need to count how many of each are on the left side and try to get the same number on the right side. Both sides must be equal to have a balanced equation.

How many grams of carbon dioxide would 6.0E25 molecules be?

Answers

Answer:

4383.28 g

Explanation:

First we'll need to convert molecules into moles, we can do so using Avogadro's number:

6.0x10²⁵ molecules ÷ 6.023x10²³ molecules/mol = 99.62 moles

Then we will convert 99.62 moles of carbon dioxide (CO₂) into grams, using its molar mass:

99.62 moles CO₂ * 44 g/mol = 4383.28 g

Que cantidad de agua sera necesaria agregar a 25 gramos de sulfato de cobre II para preparar una solución al 15% m/m?

Answers

Answer:

141.7 de Agua deben ser adicionados para preparar la solución deseada

Explanation:

El %m/m se define como la masa de soluto (En este caso, sulfato de cobre) en 100g de solución (Sulfato de cobre + Agua):

%m/m = Masa soluto / Masa soluto + Masa Agua *100

Reemplazando con los datos del problema:

15%m/m: 25g CuSO₄ / (25g CuSO₄ + Xg H₂O) * 100

0.15 = 25 /(25+X)

3.75 + 0.15X = 25

0.15X = 21.25

X = 141.7 de Agua deben ser adicionados para preparar la solución deseada

Which of the following is not an example for electroplating? A Tin cans for storing food
B Chromium used on bath taps to get shiny appearance
C Copper used for making electrical wires
D To protect iron objects used in machineries, from corrosion
If you answer you will get brainiest
Please answer and thank

Answers

Answer:

C. Copper used for making electrical wires

Explanation:

When a coating of a particular metal is applied on another metal, the process is termed as electroplating. The process is carried by the process of electro-deposition. This process is carried on in order to enhance the quality of the objects manufactured. The coating helps in resistance and provides an attractive appearance to the object.

Option C. is not an example of electrocoating because on the copper wires no other metal coating is done. In all the other three options, coating has been done on the object.

What group on the periodic table has the fewest valance electrons

Answers

Answer:

Alkali metals

Explanation:

The lowest number of valence electrons is found in the alkali metals (group 1), which have only one valence electron per atom.

Answer:

Alkali metals:) im 100% sure because i just got done learning everything in the periodic table:)

Explanation:

A candle burning is an example of _____.

Answers

Answer:

The burning of a candle is both a physical and a chemical change.

Explanation:

Plz mark brainliest thanks

A chemical reaction.

What tools and technology
predict weather changes?

Answers

Answer:

Observational data collected by doppler radar, radiosondes, weather satellites, buoys and other instruments are fed into computerized NWS numerical forecast models. The models use equations, along with new and past weather data, to provide forecast guidance to our meteorologists

i need help guysssss

Answers

Answer:

Explanation:

It increases fast.

The 2nd one so B,A the thing increases

a car motor running as a car travels down the road.
Kinetic Energy
Potential Energy

Answers

Answer:

kinetic energy

Explanation:

force is used

(Pleaseeee help me) List 3 things you should talk about in a good conclusion?

Answers

1) It recaps where you’ve been.
Throughout your essay, you’ve shared experiences, skills and knowledge that have driven you toward who you are today. In your conclusion, remind the admissions team about how all those different elements work in combination to make you a unique candidate for their program.
2) It recaps where you are.
This is an aspect applicants often forget to include. You are at a crucial junction between the past and the future, and this program you’re applying to is the bridge. Recap why this program is an important stepping stone in your career path and how it’s a good fit for you personally.
3) It recaps where you are going.
Most importantly, you must tell the admissions team what your long-term career goal is. The more specific you can be, the better (even if you aren’t 100% sure, it’s best to come off as confident that you know what you want!). For example, rather than just recapping that you want to become a doctor, you can share additional sub-goals, such as wanting to be a doctor who works in low-income, inner city hospitals since you volunteered at those types of facilities before. Or perhaps you plan to go back to the country where you grew up and work as a surgeon there since they are in such short supply.
Bring It Together
Once we bring all three of those elements together, you can see how they link together to form one, solid conclusion. Ideally, your conclusion should be about 4-6 sentences long — not too short but not a long ramble. Below is an example showing how fusing the past (1), present (2) and future (3) together can end your essay on a strong note.

Answer:

easy, beging sentenice(dont judge spelling), refer to quotes, final thoughts

Explanation:

what is the number of neutrons in the element Nickel?

Answers

Answer:

Number of Protons, 28. Number of Neutrons, 31. Number of Electrons, 28

Explanation:

N/A

answer: nickel element has 30 neutrons

If the moon is full on January 16, on approximately what date will it be full in February?
A. February 10
B. February 22
C. February 1
D. February 12

Answers

Answer:

February 12th.

Explanation:

Trust me.

the correct answer is c

How many moles of water are
in 1.23x1018 water molecules?

Answers

Answer:

0.20 times 10(-5)

Explanation:

how can a magnet attract an apple

Answers

The apple is diamagnetic or paramagnetic which causes it to attract to the magnet

In an ecosystem, which of the fcHlowing is NOT a trait of living organisms?

Contains DNA

Can reproduce

Made of cells with membrane

Responds to stimuli

Answers

Answer:

responds to a stimuli or made of cells with membrane

Explanation

What is the name of this nuclear process ?

Answers

Answer:

Fission

Explanation:

Which set up would correctly complete the work for determining how many moles of NaOH will be produced if 10.5 grams of water (H2O) is used?

Answers

Answer:

B: 2 mol NaOH/2 mol H2O

Explanation:

The reaction equation is;

H2SO4 + 2NaOH = Na2SO4 + 2H20

Now, to know how many moles of NaOH will be produced for 10.5 grams of water (H2O) used, and since the molar mass of H2O is 18.02 g/mol and number of moles attached to H2O and NaOH in the reaction are both 2 we will have;

10.5g H2O × 1 mol H2O/18.02 g H2O × 2 mol NaOH/2 mol H2O

Thus correct answer is option B

how do i get my skin perfect without expensive products? I'm asking bc my face and neck have been massively breaking out with pimples and sweat bumbs. i can go out in public its so bad plsss help

Answers

Answer:

if you are a teen then its pretty normal as during the age of adolescent sweat gland become active and pimples take place on you face , no need to worry at this your face will become beautiful again .

but if you are above 25 then it is a time to worry , you should consult a doctor or you can use alovera jel or any other home remedies. :)

What is the chemical reaction taking place?

Answers

Answer: Synthesis (of phosphorous and oxygen to form tetraphosphorous decaoxide)

Explanation:

what is the coefficient in this chemical formula? 3C6H12O6
A. 12

B. 18

C. 3

D. 6

Answers

The answer is C. hope this helped!!!

What does the poitof incidence mean?

Answers

Answer:

Point of incidence: The point on the surface where the incident ray strikes the surface is called the point of incidence. Reflected ray: The ray of light that bounces back from the surface of an object is called a reflected ray of light.

Explanation:

Which change in pH represents a hundredfold increase in the concentration of hydronium ions

in a solution?

(1) pH 1 to 2

(2) pH 1 to 3

(3) pH 2 to 1

(4) pH 3 to 1

Answers

Answer:(4) pH 3 to 1

Explanation:

im 95% sure its the right answer

Can skin help animals see?

Answers

To be honest No not at all

Answer:

Explanation:

Skin is the layer of usually soft, flexible outer tissue covering the body of a vertebrate animal, with three main functions: protection, regulation, and sensation. Other animal coverings, such as the arthropod exoskeleton, have different developmental origin, structure and chemical composition.

Other Questions

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The four new hires have been thwarted in their attempts to have the company invest more in marketing and customer service instead of investing in technological research, and they blame the senior executives for being hard-headed. The conflict episodes are being viewed by both sides as personal attacks rather than attempts to resolve the problem. The conflict at NewTel appears to be a Multiple Choice relationship conflict. task-related conflict. constructive conflict. legal conflict. 40 POINTS GOD HELP ME PLEASEWhat is the scale factor? What evidence in the text indicates that culture affects manjiros life? All the students pulled out their pens. They placed them on their desks.Ruth's pen was different. Each of her writing instruments has their capsdestroyed by nervous chewing.Change their pens to his or her pen.Change their desks to his or her desk.o Change their caps to its cap.o No change is necessary. Dont get confused! The terms immigrant and emigrant can refer to the same person. 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