Will mark brainliest. Anyone willing to do this?

Besides building teeth and bones, calcium also keeps your blood and muscles moving and helps your nerves send messages from your brain to the rest of your body. Your body can't make calcium, so you need to get it from food or supplements. While you're pregnant, try to get at least 1,000 mg of calcium every day.

Calcium is a vital mineral. Your body uses it to build strong bones and teeth. calcium is also needed for your heart and other muscles to function properly

Answer:

40 - 20 = 20

20/4 = 5m/s

The difference in velocity divided by the rate = acceleration.

Answer:

N=5.47×10^23

Explanation:

n=

[tex]n = \frac{m }{ar} [/tex]

N=n×la

Answer:

It would be B

Explanation:

Answer:

air pressure is the air around you  that ahs weight and it presses everytime you touch , wind speeds is the amount of wind formedin weather

Explanation:

Answer: The greater the difference in pressure, the faster the winds. When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure

Explanation: Hope this helps :)

Answer:0.025576559594663 mole.

Explanation:

Answer:

5.8125*10^-3

the moles in Fe2O3 are 0.93/(56*2 + 16*3) = 5.8125*10^-3

Answer:

It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs.

Explanation:

Answer:

Explanation:

The muscle that is contracted, it allows the lungs to fill with air through diaphragm muscle.

Hope it helped you.

Answer:

Explanation:

f i did this in my class

Answer:

3 rd

Explanation:

yes answer is 3 you can go with it

Answer:

B. X= Elements, Y= Compounds

Explanation:

An element is a substance that is made up of only one type of atom. The atoms of an element can combine together chemically to form a molecule but can still exist as an individual atom e.g. Hydrogen atom; H can form molecule H2. Since only one atom makes up an element, its electrons act independently.

Compounds, on the other hand, are substances that are made up of more than one type of atom chemically combined. A compound can only exist as a molecule because it always contains more than one atom bonded together. However, since more than one atom are involved in the chemical bond that holds them together, electrons are shared with other atoms. Example of a compound is H20 containing atoms of hydrogen and oxygen that are chemically combined.

Answer:

The molarity is 0.0174 [tex]\frac{moles}{liter}[/tex]

Explanation:

Molarity (M) or Molar Concentration is the number of moles of solute that are dissolved in a certain volume.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution.

[tex]Molarity=\frac{number of moles of solute}{volume of solution}[/tex]

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

In this case, being the molar mass of compound Pb(C₂H₃O₂)₄ equal to 443.38 g / mol, then the following rule of three can be applied: if 443.38 grams are contained in 1 mol, 2.7*10⁻² grams in how many moles they are present?

[tex]amount of moles=\frac{2.7*10^{-2} grams*1 mol}{443.38 grams}[/tex]

amount of moles= 6.09*10⁻⁵ moles

Being 1,000 mL= 1 L, then 3.5 mL= 3.5*10⁻³ L

So:

[tex]Molarity=\frac{6.09*10^{-5} moles}{3.5*10^{-3} L}[/tex]

Solving:

Molarity=0.0174 [tex]\frac{moles}{liter}[/tex]

The molarity is 0.0174 [tex]\frac{moles}{liter}[/tex]

Answer:

B. The atom has two more electrons than an atom of oxygen.

Explanation:

In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.

Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.

Oxygen has a total number of eight (8) electrons while neon has total number of ten (10) electrons. Therefore, an atom of oxygen is able to gain (receive) two (2) more electrons in order to have the same electron arrangements as the noble gas i.e an atom of neon with an atomic number of 10.

This ultimately implies that, an [tex] O^{2-} [/tex] atom contains the same number of electrons as an atom of neon.

Hence, a neon atom has two more electrons than an atom of oxygen.

Additionally, Neon is used in lighting advertising displays.

5.00 mol O₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

3.01 × 10²⁴ atoms O₂

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

4.99834 mol O₂ ≈ 5.00 mol O₂

Answer:

i did this assignment today, so u and i might be classmates :3 answer is shown below in 'explanation.'

Explanation:

the roller coaster assignment: force: 160 newtons. distance: 40 m high. time: 10 sec. work: 6400. average speed: 4 km.

for the whale assignment: force: 800 newtons. Distance: 10 meters. time: 3.5 seconds. work: 8,000 J. Average speed: 2.85

for the car: force: 1400 newtons. Distance: 800 m. time: 40 minutes. work: 1,120,000. average speed: 20.

moving company: force: 600. Distance: 80 m. time: 50 min. work: 48,000. average speed: 1.6.

I hope this is correct, bc i got 100% !! :3

Answer: I just added this so you can give the other person brainly

Answer

Electrons live inside the nucleus and carry a neutral charge.

Explanation:

Answer:

Three lines between the carbon atoms in the Lewis structure represent three covalent bonds. Each covalent bond is a shared pair of electrons, hence there are six electrons being shared between the carbon atoms in ethyne.

The number of electrons that are being shared between the two carbon atoms in the covalent compound ethyne is six.

Covalent bond are formed by the sharing of electrons between two atoms.

In ethyne molecule two carbon atoms are present and between two carbon atoms three covalent bonds are present. And each covalent bond is formed by the sharing of two electrons. So three covalent bonds are formed by the sharing of 6 electrons.

Hence in ethyne 6 electrons are being shared.

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Answer:

The rain containing excess of acid I called acid rain

Answer:

acid rain

Explanation:

Thats literally what its called

Answer:

answer this and ill answer that

Explanation:

during a heating or cooling process, how are changes in enthalpy and temperature related?​

Answer:

isopropyl alcohol

Explanation:

HOPE IT HELPS YOU

Answer:

The volume of 8.625 g of sulphur dioxide at RTP is approximately 3,230.84 cm³

Explanation:

The question requires the determination of the volume occupied by the gas based on the molar volume of a gas at STP

The given parameters of the sulphur dioxide, SO₂, gas are;

The mass of the given SO₂ gas = 8.625 g

The molar mass of SO₂ = 64.07 g/mol

The number of moles, 'n', in the given sample of SO₂ gas = Mass of SO₂/(Molar Mass of SO₂)

∴ The number of moles of SO₂ in the gas sample = 8.625 g/(64.07 g/mol) ≈ 0.134618386 moles

The molar volume of a gas at RTP is approximately 24 dm³/mole

24 dm³ = 24,000 cm³

∴ The molar volume of a gas at RTP is approximately 24,000 cm³/mole

The volume occupied by a gas at RTP = (The number of moles of the gas) × (The Molar Volume of a gas at RTP)

∴ The volume occupied by the 8.625 g of SO₂ gas at RTP = 0.134618386 moles × 24,000 cm³/mole ≈ 3,230.84 cm³

The volume occupied by the 8.625 g of SO₂ gas at RTP ≈ 3,230.84 cm³.

Answer:Yes

Explanation:  Matter is everything around you.

Explanation:

solvent bc when you remove it it becomes more concentrate

Answer:

guhhh

Explanation:

Answer:

c

Explanation:

You can differentiate between calcite and halite without using any measuring equipment based on: C. Hardness.

A mineral can be defined as a form of naturally occurring, inorganic solid substance that is typically characterized by a crystal structure.

In Science, the properties that can be used to identify and differentiate two or more minerals include the following:

In conclusion, hardness is a mineral property that can be used to differentiate between calcite and halite without using any measuring equipment.

Read more on hardness here: https://brainly.com/question/24333064

Answer:

what are you supposed to answer???

Explanation:

The model that represents the physical property of metals known as ductility can be seen in the image attached below.

Metals are substances that are good conductors of heat and electricity.

The term ductility is a characteristic of metal and it explains the ability of metals to be drawn into wire. it implies that metal materials can be hammered and beaten into tiny sheets of wires.

The model in the image attached below shows how gold which is metal is drawn into wires.

Learn more about metals here:

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