What is the atomic mass
of an atom of calcium,
Ca?

Answers

Answer 1
You can obtain the atomic mass of any chemical element by using the periodic table provided below.

The atomic mass is usually listed underneath the chemical symbol. The units associated with molar mass is grams per mole (g/mol).

Therefore, the atomic mass of calcium (Ca) is 40.08 g/mol.

Hope this helps!
What Is The Atomic Massof An Atom Of Calcium,Ca?

Related Questions

A scientist was studying layers of earth in the side of a mountain. In the lower layers, she found fossils of reindeer and polar bears. In the upper layers, she found fossils of coyotes and squirrels. Which conclusion most likely explains the different fossils?
Group of answer choices

The climate was very cold in earlier time periods and became warmer in later time periods

The climate was very hot in earlier time periods and became colder in later time periods.

The climate was wet in earlier time periods and became drier in later time periods.

The climate was dry in earlier time periods and became wetter in later time periods.

Answers

Answer:

The climate was very hot and became colder in later time periods.

Answer:

The climate was very hot in earlier time periods and became colder in later time periods.

A balloon contains 3.20 L of helium. The pressure is reduced to 59.0 kPa, and the
balloon expands to occupy a volume of 5.50 L. What was the initial pressure exerted on
the balloon?

Answers

Answer:

101.4pKa

Explanation:

Given parameters:

Initial Volume of helium  = 3.20L

Final pressure of helium  = 59kPa

Final volume on helium gas = 5.5L

Unknown:

Initial pressure exerted on the balloon = ?

Solution;

To solve this pressure - volume problem, we simply apply the Boyle's law.

It states that "the volume of a fixed mass gas varies inversely as the pressure changes if the temperature is constant".

  Mathematically;

         P1 V1  = P2 V2

Now, insert parameters and solve;

         P1 x 3.2 = 59 x 5.5

          P1  = 101.4pKa

please help question is in photo will give brainiest

Answers

Answer:

D

Explanation:

what process will decrease the level co2 in the atmosphere

Answers

Answer:planting more trees

Explanation:

Trees go through photosynthesis and uses carbon dioxide (CO2) and changes it to oxygen

Photosynthesis

Photosynthesis removes CO2 from the atmosphere and replaces it with O2. Respiration takes O2 from the atmosphere and replaces it with CO2. However, these processes are not in balance.

AYOSOMEONEHELPMEWITHTHESETWOMULTIPLECHOICEQUESTIONS

I’ll give a brainest

Answers

Answer:

b. close to 0 degree celsius

Explanation:

100 g * ( x-0)= 500 g * ( 25-x) , where x is the new temperature reached

if we solve for x , we get 20 degree celsius

i.e. the temperature of ice increases to 5 degree celsius and the temperature of water drops to 5 degree celsius

hope it helps.

Write a balanced chemical equation for the following: magnesium metal is burned in oxygen to produce magnesium oxide.

Answers

A balanced chemical equation for burning Magnesium

2Mg(s)+O₂(g)⇒2MgO(s)

Further explanation

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.

2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product

3. Select the coefficient of the substance with the most complex chemical formula equal to 1

Reaction(syntesis / combination)

Mg(s)+O₂(g)⇒MgO(s)

give coefficient

aMg(s)+bO₂(g)⇒MgO(s)

Mg, left=a, right 1⇒a=1

O,left=2b,right 1⇒2b=1,b=0.5

Mg(s)+0.5O₂(g)⇒MgO(s) x 2

2Mg(s)+O₂(g)⇒2MgO(s)

What can you see in both the Map View and the Cross-Section View?

Answers

Geologic Illustrations. A map shows a bird's eye view looking down at the earth's surface. ... Often a geologic map will indicate both the type of rock and the age of the rock. A cross section shows the surface of the earth (with or without topography or elevation) and a vertical slice of the earth

Why can a solution be classified as a mixture?

Answers

Answer:

A. It is made up of only one substance

Explanation:

Hormones are secreted by glands in the human body. The hormones control different functions of the body by targeting specific organs and controlling the way their cells work. Which organ system is made of these hormone-producing glands?

Answers

Answer:

Bb

Explanation:

Can someone help me with this?-- 15 pts!

2H2 + O2 → 2H2O

At the beginning of the reaction, it is measured that there are 15.0 g of hydrogen (H2) and 97.0 g of oxygen (O2).

What is the theoretical yield for the water that will be produced in the reaction? (M H2O = 18.0 g/mol; M CH4 = 16.0 g/mol)

2.73 x 101 g H2O
1.34 x 102 g H2O
1.08 x 102 g H2O
5.38 x 100 g H2O

Answers

Answer:

1.08 x 10^2 gm of H2O

Explanation:

number of moles of O2 = 97g /32 g/moles = 3.03 moles

3.03 moles of O2 produces 6.06 moles of H2O

amount of water produced = 6.06 mol x 18 g /mol = 109.08 g = 1.08 x 10^2 g

water in a plate disappear after some hour when it is kept in the sun why​

Answers

Answer:

This happened because of evaporation, the sun evaporated the water.

Answer:

Because if you place the plate filled with water in the sun then a small amount of water will be dried up by the sun's heat.

What level of ecological organization so all the owls in a certain area represent?

Answers

The owls in the certain area located in the picture represent a population, they are formed up as a small group of animals representing a small species.

The level of ecological organization that all owls in a given area represent is the population of owls in a given area.

What is ecology?

In ecology, the organism, population, community, ecosystem, and biosphere are among the levels of organization. A population is a collection of creatures from the same species that coexist in one location and communicate with one another.

Researchers in the field of ecology focus on five major levels: organism, population, community, ecosystem, and biosphere. These levels are sometimes studied separately and other times they overlap. Let's examine each stage one by one.

The owls in the particular location shown in the image are a population; they are made up of a few individuals representing a single small species.

To learn more about Ecology refer to:

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Which of the following instruments is a combination of a percussion and a stringed instrument?

A) saxophone

B) piano

C) oboe

D) tambourine

Answers

Answer:B

Explanation:

Which of the following is a INCORRECT ionic compound formula?
MgO
Na20
MgCl
NaCl

Answers

Answer:

Na2O

explanation.

Ionic bonds refers to complete transfer of electrons from one atom to another

PLEASE, PLEASE HELP ME!!!

4 Fe + 3 02 --------------- 2 Fe2 O3

In this chemical equation, why is the number of atoms the same on each side of the arrow?

Chemical reactions reduce matter but create energy.
Chemical reactions produce new matter.
Matter cannot be created or destroyed.

Answers

Answer:

Matter cannot be created or destroyed.

Explanation:

According to law of conservation of matter, Matter can neither be created nor destroyed. It just gets converted into other forms.

So, It's important to equalize the no. of moles on either side of the chemical reaction.

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

~AnonymousHelper1807

Identify the isotope that has atoms with 28 neutrons, 23 protons, and 23 electrons

A. ^28 Ni
B. ^23 V
C. ^23 Mn
D. ^51 Sb
E. ^51 V

Answers

Answer:

E. ^51 V

Atomic number (number of protons in the nucleus): 23

Atomic symbol (on the periodic table of the elements): V

Atomic weight (average mass of the atom): 50.9415

Density: grams per cubic centimeter

Phase at room temperature: Solid

Melting point: 3,470 degrees Fahrenheit (1,910 degrees Celsius)

Boiling point: 6,165 F (3,407 C)

Number of isotopes (atoms of the same element with a different number of neutrons): 2; one stable V-51; one radioactive V-50

Most common isotopes: V-51 (99.75 percent natural abundance)

what is mass in grams of 175 mL of salt water with a density of 1.30 g/cm3

Answers

Answer:

Answer: 227.5 grams

Explanation:

Answer:

227.5

Explanation:

Acellus

Read the hypothesis below. Hypothesis: if a steel surface is wet with water, then the friction will be reduced, which question best matches the hypothesis ???

Answers

Answer:

how will water affect the force of friction

90% sure

Which element rarely reacts because it has 8 electrons in its outer shell?
A. Bromine
B. Xenon
C. Arsenic
D. Potassium

Answers

Answer:

B. Xenon

Explanation:

A.P.E.X

According to the electronic configuration,the element which rarely reacts is xenon as it has 8 electrons in it's valence shell.

What is electronic configuration?

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

Learn more about electronic configuration,here:

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What is the energy (in joules) and the wavelength (in meters) of the line in the spectrum of hydrogen that represents the movement of an electron from Bohr orbit with n = 3 to the orbit with n = 5?

Answers

15 I think because of what you ask I’m a college student so yea

Which statement best describes the physical properties of solid, liquid, and gas fuels?

-Solids and liquids decompose and transform into non-flammable vapors when exposed to their ignition point.
-The vapors produced by decomposed fuels combust into flames when heated to their flammable point.
Which statement best describes the physical properties of solid, liquid, and gas fuels? -Liquid fuels take longer to ignite than solid or gas fuels.
-Liquid fuels require the least amount of time to ignite.

Answers

Answer:

I did not understand

i donot know it is correct

(i think 2 one is the best)

Explanation:

What is a chemical formula?

Answers

Answer:

A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus and minus signs.

Explanation:

Why can't you squeeze a sealed plastic syringe that is completely filled with water??

Answers

Answer:

Water has less compressibility. When you squeeze it, it has no place to escape.

Explanation:

NEED ASAP PLS!!

What important contribution did Einstein make concerning the relationship between energy and matter?
a.) A small amount of matter can be changed into a huge amount of energy
b.) A small amount of energy is created when large amounts of matter is changed
c.) The creation of energy will result in matter
d.) Matter can never be created

Answers

Answer: It is a

Explanation:

When HNO3 and Au are mixed together, what do you expect to happen, and why?

No reaction, because Au is above H on the activity series and they cannot react
No reaction, because Au is lower on the activity series and cannot replace H
They form Au(NO3)2 and H2, because Au is more reactive and able to replace H
They form Au(NO3)2 and H2, because they trade places in a double replacement reaction

Answers

Answer:

B

Explanation:

There can be no reaction because Au is above H on the activity series and cannot react.

Answer: B is correct

Explanation: I took the quiz

If you have a mole of boron and a mole of carbon would they have the same number of
atoms in each mole? Please help ❤️

Answers

Answer:. that contains the same number of entities as there are atoms in 12 g of carbon-12. ... the same as the mass of one mole of the compound in grams. • Skill 3-1 Calculate the ... Molar mass has units of grams per mole (g/mol). Concept 3. ... of moles to mass: •We can do the reverse with 1/M, and convert any mass in grams to.

Explanation:

The number of atoms in a mole of boron and carbon is required.

A mole of carbon and a mole of boron have the same number of atoms.

The unit of amount of substance is called mole.

[tex]1\ \text{mole}=6.022\times 10^{23}\ \text{atoms, molecules, ions, or electrons}[/tex]

So, 1 mole of any element, whether it be carbon or boron has the same number of atoms which is [tex]6.022\times 10^{23}[/tex].

Learn more:

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https://brainly.com/question/1731823

Which of the following elements has the lowest ionic radius?

Answers

Answer:Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest. So the asnwer is helium

Explanation:

How to draw a covalent bonding plz help ppl

Answers

Explanation:

A single covalent bond is made up of 2 electrons (one from each atom). It is represented with a single line.

Each line is represented as one dot and one cross (. x)

A double covalent bond is made up of 4 electrons (2 from each atom). It is represented using 2 lines. As dot and cross, it will be represented with 2 dots and 2 crosses.

A triple covalent bond is made up of 6 electrons (3 from each atom). It is represented using 3 lines. As dot and cross, it will be represented with 3 dots and 3 crosses.

Know the number of electron (s) needed by the atom to have noble gas configuration / stable (Key: You should know your electron arrangement / group number / Refer to table provided)*.

Groups and the number of electrons needed for atoms to have noble gas configuration or have full outer shell(s).

Group 4: Four (4) electrons needed for the outer shell to become full / noble gas configuration;

Group 5: Three (3) electrons needed by the atom to have a full outer shell / noble gas configuration;

Group 6: Two (2) electrons needed

Group 7: One (1) electron needed

what does wavelength refer to?

Answers

Answer:

Wavelength, distance between corresponding points of two consecutive waves. ... Wavelength is usually denoted by the Greek letter lambda (λ); it is equal to the speed (v) of a wave train in a medium divided by its frequency (f): λ = v/f.

Explanation:

how do i do this question please help me

Answers

Answer:

3

Explanation:

The reaction is given as:

           H₂S   +   O₂   →  SO₂    +    H₂O

Let us balance the chemical equation.

 We take some letters and we use them as the coefficient to balance the equation;

          aH₂S   +   bO₂   →  cSO₂    +    dH₂O

Now,

  Conserving H;

         2a  = 2d

 Conserving S;

         a = c

 Conserving O;

        2b  = 2c + d  

Let a  = 1, d  = 1, c  = 1, b  = [tex]\frac{3}{2}[/tex]  and multiply through by 2;

    a = 2, b  = 3, c  = 2 and d = 2

So, the balanced reaction equation is given as;

    2H₂S   +   3O₂   →  2SO₂    +    2H₂O

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