What i

Chemistry:

Collect information regarding periodical development of fundamental

particles and structure of atom with different atomic models and display

then information Chart.

Answer:

B

Explanation:

Answer:

C. The behavior of an organism is not influenced by either its heredity or its environment.

Answer:

One mole of H2O is made up of 2 moles of Hydrogen atoms and 1 mode of Oxygen atom. Mass of two moles of Hydrogen atoms = 2x1 g/mol. Mass of one mole of water = 2 g/mol + 16 g/mol = 18/ mol.

Explanation:

I majored in Chemistry

Answer:

Ecosystem services are indispensable to the wellbeing of all people, everywhere in the world. They include provisioning, regulating, and cultural services that directly affect people, and supporting services needed to maintain the other services.

Ecosystem provides water and air which are essential for survival on earth without the presence of these essential things life on earth could not exist.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

Learn more about ecosystem,here:

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Answer:

V = 12.5 L

Explanation:

Given data:

Volume of NO = 15.0 L

Temperature and pressure = standard

Volume of nitrogen gas produced = ?

Solution:

Chemical equation:

6NO + 4NH₃    →     5N₂ + 6 H₂O

Number of moles of NO:

PV = nRT

n = PV/RT

n = 1 atm × 15.0 L / 0.0821 atm.L /mol.K × 273.15 K

n = 15.0 atm.L / 22.43 atm.L /mol

n = 0.67 mol

now we will compare the moles of No and nitrogen gas.

              NO           :         N₂

               6             :          5

              0.67         :         5/6×0.67 = 0.56

Volume of nitrogen gas:

 PV = nRT

1 atm × V = 0.56 mol ×  0.0821 atm.L /mol.K × 273.15 K

V = 12.5 atm.L / 1 atm

V = 12.5 L

Answer:

cats, ants, spiders, elephants, porcupine, tiger, kangaroo, and ostrich. Mosses, hornworts, liverworts, lycophyte, seed plants, pteridophytes, and archaeopteridales.

Explanation:

Explanation:

Moles of N2 = 35.0g / (28g/mol) = 1.25mol

Moles of H2 = 60.0g / (2g/mol) = 30.0mol

Since 1.25mol * 3 < 30.0mol, nitrogen is limiting.

Moles of NH3 = 1.25mol * 2 = 2.50mol.

Mass of NH3 = 2.50mol * (17g/mol) = 42.5g.

30.0mol - 1.25mol * 3 = 26.25mol.

Excess mass of H2

= 26.25mol * (2g/mol) = 52.5g.

The atomic mass of the metal.(M) = 51 g/mol

Given

32% of oxygen

Required

the atomic mass of the metal.​

Solution

An oxide of trivalent metal : M₂O₃(Ar O = 16 g/mol)

The molar mass of metal oxide = 2M+16.3=2M+48

32% of oxygen, then :

32% x 2M+48 = 48

0.32(2M+48)=48

0.64M+15.36=48

0.64M=32.64

M=51

Answer:

25

Explanation:

fing the highest common factor

pime factorisation:

125=5×5×5

150=2×3×5×5

225=3×3×5×5

find the common numbers in all prime numbers

》5×5=25

Answer:

B.

to contain the genetic information of an organism

Explanation:

The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus.

Answer:

Second order

Explanation:

We could obtain the order of reaction by looking at the table very closely.

Now notice that in experiment 1 and 2, the concentration of [OH^-] was held constant while the concentration of [S8] was varied.  So we have;

a situation in which the rate of reaction was tripled;

0.3/0.1 = 2.10/0.699

3^1 = 3^1

Therefore the order of reaction with respect to  [S8] is 1.

For [OH^-], we have to look at experiment 2 and 3 where the concentration of [S8] was held constant;

x/0.01 = 4.19/2.10

x/0.01 = 2

x = 2 * 0.01

x = 0.02

So we have;

0.02/0.01 = 2^1

2^1 = 2^1

The order of reaction with respect to  [OH^-] = 1

So we have the overall rate law as;

Rate = k[S8]^1  [OH^-] ^1

Overall order of reaction = 1 + 1 = 2

Therefore the reaction is second order.

Answer:

zinc metal (ZN) is an element

Answer: Molecules contain two or more atoms and are held together by covalent bonds, whereas compounds are held together by ionic bonds. Two or more elements bonded together through ionic attraction. Compounds contain two or more atoms and are held together by ionic bonds, whereas molecules are held together by covalent bonds.

Explanation:

Answer:

Plants and animals have different cell types, one is a autotroph and one is a heterotroph, plants can use photosynthesis and animals cannot.

Explanation:

Answer:

c is your answer

Explanation:

So, 53.49 g (M) of NH4Cl N H 4 C l contains 14.01 g (m) of N . So, the mass percent of nitrogen in NH4Cl N H 4 C l is 26.19%.

Answer:

 i really dont know

Explanation:

Answer:

Answer: The answer is 0.0054314469917931, I'm pretty sure.

The empirical formula of the compound is called the formula unit in chemistry. In 1.5 moles of magnesium bromide, [tex]9.03\times 10^{23}[/tex] formula units are present.

Moles are the measuring units of the molecules, atoms, and other particles of the chemistry. Formula units of any substance can be estimated as the product of the moles and the Avogadros number.

The number of the moles present of the magnesium bromide is 1.5 mol and the value Avogadro number is [tex]6.02 \times 10^{23}.[/tex]

If 1 mole of the substance contains [tex]6.02 \times 10^{23}[/tex] formula units, then, formula units in 1.5 moles are:

[tex]\begin{aligned} & = 1.5 \times 6.02 \times 10 ^{23}\\\\& = 9.03 \times 10^{23} \end{aligned}[/tex]

Therefore, [tex]9.03 \times 10^{23}[/tex] formula units are present in 1.5 moles of magnesium bromide.

Learn more about formula units here:

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Answer:

B) When the tilt of the Earth causes the sun’s energy/light to be spread out over a larger area, temperatures are ______warmer______ causing _____Summer_______ to occur.

Answer:

The amount of each element in the reactants equals the amount of each element in the products.

For the well balanced equation of photosynthesis

Answer:

There are four categories of byproduct material: Radioactive material that results from the fissioning, or splitting apart, of enriched uranium or plutonium in nuclear reactors. Examples include cobalt-60, cesium-137 and iridium-192. Tailings or waste produced by processing uranium or thorium from ore.

^ tap to see the full pic

Explanation:

you make use of the formulas

amount(mol) = number of particles ÷ 6.02 × 10^23

and

mass(g) = amount(mol) × molar mass

Answer:

D. Earthquake

Explanation:

I think earthquake because the question is asking for SLOW changes and an earthquake is kind of a sudden change...so yeah.

Hope this helps :D

Answer:

I think it the second one adding external weight or the third one

Explanation:

I could never. im more like the last one

I'm really sorry if this was no help

Answer:

solid and liquid state respectively

Answer:

A - solid, liquid

Explanation:

ur welcome