many types of animals have internal skeletons a large part of these animals masses located in them bones as an animal grows its skeleton grows a growing animal must increase the size of its bones to do this animal needs lots of calcium an element important to do structure of Bones how can a growing animal get calcium to make new bones tissue? A-by removing calcium from the air B- by consuming food that contains Calcium C- by making calcium from other elements D- by removing calcium from the bones ​

Mass of Oxygen (O₂) : = 88.16 g

Given

Reaction(unbalanced)

C₆H₁₄+ O₂ → CO₂ + H₂0

25 g C₆H₁₄

Required

mass of oxygen (O₂)

Solution

Balanced equation

2C₆H₁₄ + 19O₂ ⇒12 CO₂ + 14 H₂O

mol C₆H₁₄ (MW=86,18 g/mol) :

= mass : MW

= 25 g : 86.18 g/mol

= 0.29

From the equation, mol ratio of C₆H₁₄ : O₂ = 2 : 19, so mol O₂ :

= 19/2 x mol C₆H₁₄

= 19/2 x 0.29

= 2.755

Mass O₂(MW=32 g/mol) :

= 2.755 x 32

= 88.16 g

If an electric circuit has an expected current of 80 amps. An electrician measures the current in the circuit at 120 amps, the statement that provides a possible explanation for this observation is that there is not enough voltage in the circuit.

The third option is correct.

An electrical circuit is described as a network consisting of a closed loop, giving a return path for the current.  

It is a known fact that  the electrical energy in any circuit is given by the product of the current and voltage and if the current is higher than expected it means that the voltage is not enough to keep the current at the expected level.

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Answer: d

Explanation: i took the test

Answer:

A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density ( is this it )

Answer:

[H⁺] = 3.98×10⁻⁷ M

Explanation:

Given data:

pH of blood = 6.40

Hydrogen ion concentration = ?

Solution:

Formula:

pH = - log[H⁺]

by rearranging this formula,

[H⁺] =  10⁻(pH) or [H⁺] = antilog (-pH)

By putting values,

[H⁺] = 10 ⁻⁶°⁴⁰

[H⁺] = 3.98×10⁻⁷ M

Answer:

[tex]m=25.20gNO[/tex]

Explanation:

Hello!

In this case, since the STP conditions are known as 273.15 K of temperature and 1.00 atm of pressure, we can use the ideal gas equation to compute the moles of NO gas first:

[tex]PV=nRT\\\\n=\frac{PV}{RT}=\frac{1.00atm*18.82L}{0.08206\frac{atm*L}{mol*K}*273.15K}=0.8396molNO[/tex]

Next, since the molar mass of NO is 30.01 g/mol the resulting mass in grams is:

[tex]m=0.8396 molNO*\frac{30.01gNO}{1molNO}\\\\m=25.20gNO[/tex]

Which has four significant figures.

Best regards!

Answer:

Assuming it was collected from the atmosphere it would be virtually nothing

Explanation:

hydrogen makes up 0.000055% of the atmosphere while oxygen makes up 23 percent. 20/400000 cm^3 of hydrogen

Answer:

i am not sure if we are talking about the same thing but here let me try.....

Explanation:

To explain the observed behavior of transition metal complexes (such as how colors arise), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It allows us to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.

CFT focuses on the nonbonding electrons on the central metal ion in coordination complexes not on the metal-ligand bonds. Like valence bond theory, CFT tells only part of the story of the behavior of complexes. However, it tells the part that valence bond theory does not. In its pure form, CFT ignores any covalent bonding between ligands and metal ions. Both the ligand and the metal are treated as infinitesimally small point charges.

All electrons are negative, so the electrons donated from the ligands will repel the electrons of the central metal. Let us consider the behavior of the electrons in the unhybridized d orbitals in an octahedral complex. The five d orbitals consist of lobe-shaped regions and are arranged in space,  In an octahedral complex, the six ligands coordinate along the axes.

To explain observed behavior of transition metal complexes a model involving electrostatic interactions between  electrons from ligands and the electrons in  unhybridized d orbitals of  central metal atom has been developed. This electrostatic model is crystal field theory (CFT).

The transition metals are defined as the elements  in which atoms are present whose d-sub-shell is partially filled .Due to which they give rise to cations with an incomplete d-sub-shell.

They are also defined as the elements which are present in the d-block of the periodic table, which includes groups from three to twelve.These elements are called transition elements as they show a transition between highly electro-positive group 1 and highly electro-negative group 17 elements.

They have characteristic properties due to which they can exist in variable oxidation states , form colored complexes and have catalytic properties as well.These elements are all technologically very important.

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hope this helps

Explanation:

a prolong storm will occur

that's what I found

Answer:

Yes! The above answer is correct.

Adding to it, your answer is option A.

Answer:

Sticks to the stigma

Answer:

$8.05

Explanation:

Answer:

Erosion and deposition

Answer:

Tides

Explanation:

just did it:)

Answer:

starch: A soft white chemical made by all green plants. It’s a relatively long molecule made from linking together a lot of smaller, identical building blocks — all of them glucose, a simple sugar. Plants and animals use glucose as an energy source. Plants store that glucose, in the form of starch, as a reserve supply of energy.

Explanation:

Answer:

[tex]m=7.24x10^3g[/tex]

Explanation:

Hello!

In this case, since 6.00x10²³ atoms of any element is related to one mole of atoms via the Avogadro's number, and the molar mass of xenon is 131.3 g/mol, we obtain the following mass in grams of xenon:

[tex]m=3.32x10^{25}atoms*\frac{1mol}{6.022x10^{23}atoms}* \frac{131.3g}{1mol} \\\\m=7.24x10^3g[/tex]

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The number of grams of Magnesium oxide= 106 g

Given

2.63 moles of Magnesium oxide

Required

mass of Magnesium oxide

Solution

The mole is the number of particles contained in a substance

1 mol = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

Mol = mass : Molar mass

Mass of Magnesium oxide(MgO, MW=40.304 g/mol) :

= mol x MW

= 2.63 x 40.304

= 106 g

Answer:

1- Mass and type of material

2- Type of material

3- Temperature

Answer:

1_ Mass and type of material.

2_ Type of material.

3_ Temperature

Explanation: Got it right on the test:)

Answer:

Oppositely charged particles attract each other. This attractive force is often referred to as an electrostatic force. An ionic bond is the electrostatic force that holds ions together in an ionic compound.

Explanation:

Hope this helps :)

Answer:

Clouds

Explanation:

Because I just got it right

Answer:

search it up

Explanation:

Answer:

1.7 g N₂

Explanation:

In order to convert moles of nitrogen gas (N₂) to grams, we'll use its molar mass:

0.060 only has two significant digits, so the reported answer should have two significant digits as well. Meaning the answer is 1.7 g.

7. D. 668 joules

8. B. 3 grams

Given

2 grams of water

6768 joules of energy

Required

Energy

Mass of water

Solution

The heat to change the phase can be formulated :

Q = m.Lf (melting/freezing)

Q = m.Lv (vaporization/condensation)

Lf=latent heat of fusion

Lv=latent heat of vaporization

7. phase change (ice to water)⇒Heat of fusion water=334 J/g

Q = 2 g x 334 J/g

Q = 668 J

8. phase change(water to vapor)⇒heat of vaporization water=2260 J/g

6768 J = m x 2260 J/g

m = 3 g

Answer: The acceleration of the ball is 200 m/s².

Explanation:

Force:

Force is the push or pull on an object with mass that causes it to change velocity or to accelerate.

Force represents as a vector, which means it has both magnitude and direction.

Given:

Mass of metal ball = 0.025 kg

Force           = 5 N

To Find:

Acceleration, = ?

Solution:

Formula:

The Earth moves faster than the planets that are farther from the Sun.

3.67 mol Al

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

2.21 × 10²⁴ atoms Al

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.

3.66988 mol Al ≈ 3.67 mol Al

Answer:

C Because im in 3rd grade and just did the test

Explanation:

im smart im in third grade but your doing this in college

Answer:

answer is c: In codominance, both alleles are expressed in the offspring; in incomplete dominance, the offspring demonstrate an intermediate form of the alleles from the parents.

Explanation:

Answer:

Mass = 1257.71 ×10²³ g

Explanation:

Given data:

Number of molecules of C₃H₆ = 180 molecules

Atomic mass of C = 12.01 amu/atom

Atomic mass of H = 1.008 amu/atom

Mass of C₃H₆ = ?

Solution:

1 mole contain 6.022×10²³ molecules

180 molecules × 1 mol  / 6.022×10²³ molecules

29.89×10²³  mol

Mass of C₃H₆:

Mass = number of moles × molar mass

Molar mass = 12.01×3 + 1.008×6 = 42.078 g/mol

Mass = 29.89×10²³  mol × 42.078 g/mol

Mass = 1257.71 ×10²³ g

Answer:

the Ans is 2

Explanation:

marks as BRAINLY

In calcium hydroxide, there are total 6 atoms are present. 2 calcium atoms, 2 oxygen atoms and 2 hydrogen atoms are present in calcium hydroxide molecule.

An inorganic substance having the chemical formula Ca(OH)2 is calcium hydroxide. It is created when quicklime is combined or slaked with water and is a colorless crystal or white powder. It goes by a variety of names, including pickled lime, hydrated lime, caustic lime, builders' lime, and slaked lime.

A white powder without any smell is calcium hydroxide. It is applied in commercial contexts such sewage treatment, paper manufacturing, building, and food processing. It can be used in dentistry and medicine. In root canal fillings, for instance, calcium hydroxide is frequently used.

Calcium oxide is converted to calcium hydroxide, sometimes known as slaked lime, or Ca(OH)2. A little percentage of it dissolves when combined with water, creating a substance known as lime water.

Thus, In calcium hydroxide, there are total 6 atoms are present.

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Answer:

Weathering

Explanation:

can l be the brainliest

Answer:

3.72

Explanation:

Given data:

Mass of object = 82.2 g

Volume of water = 25.0 mL

Volume of water + object = 47.1 mL

Density of object = ?

Solution:

Volume of object:

Volume of object = (Volume of water + object)  - Volume of water

Volume of object = 47.1 mL -   25.0 mL

Volume of object = 22.1 mL

Density of object:

d = 82.2 g/ 22.1 mL

d = 3.72 g/mL

Answer:

45.24

Explanation:

10.24+35=25.24