Which model is based on Bohr's quantum model?

Model A
Model B
Model C
Model D

Answer:

Protium

Explanation:

The hydrogen atom is the simplest of all atoms: it consists of a single proton and a single electron. In addition to the most common form of the hydrogen atom that is called protium, two other isotopes of hydrogen exist deuterium and tritium.

Answer: Hydrogen is a atom of the chemical element hydrogen.

Explanation:

Answer:

Rows and columns.

Explanation:

Each atom gives up some of its electrons to create a kind of sea of these randomly moving charged particles. It's these free-flowing electrons that make metals conductive.

Answer:

Calculate the number of moles of oxygen required to react exactly with 4.30 ... How many moles of NH3 can be made from 2.00 moles of Nz if you have excess Hz? ... 10. How many grams of water are made when 3.00 moles of butanol is combusted? ... If 50.0 g of calcium oxide were produced, how many grams of calcium ...

Answer:

41.44 g

Explanation:

First of all, we must put down the equation of the reaction;

[tex]CaO + H2O ----->Ca(OH)2[/tex]

Number of moles of CaO = 33g/56 g/mol = 0.59 moles

Number of moles of H20 = 10g/18 g/mol = 0.56 moles

Since the reaction is in 1:1 mole ration, H2O is the limiting reactant

Hence;

mass of Ca(OH)2 produced = 0.56 moles * 74 g/mol = 41.44 g

Answer:

Nitrogen gas is the limiting reactant

Hydrogen gas is the excess reactant

The theoretical yield is 425 g of ammonia

Explanation:

Equation of reaction: 3H2 + N2 ---> 2NH3

From the equation of reaction, 3 moles of hydrogen gas reacts with 1 mole of nitrogen to produce 2 moles of ammonia gas.

Molar mass of hydrogen gas = 2.0 g

Molar mass of nitrogen gas = 14.0 g

Molar mass of ammonia gas = 17.0 g

Number of moles of hydrogen gas in 250 g = 250/2 = 125 moles

Number of moles of nitrogen gas in 175 g = 175/14 = 12.5 moles

Mole ratio of Hydrogen to Oxygen = 125/12.5 = 10 : 1

Therefore, nitrogen gas is the limiting reactant.

Hydrogen gas is the excess reactant

14 g of nitrogen gas produces 17 × 2 g of ammonia = 34 g of ammonia

175 g will produce (34 × 175)/14 = 425 g of ammonia

Therefore the theoretical yield is 425 g of ammonia

Explanation:

carbon has 1 less electron energy shell than silicon

Carbon has 1 less electron energy shell than silicon. Hence, option A is correct.

An atom is any particle of matter which contains at least one proton.

Carbon is a nonmetal but silicon is a metalloid. Carbon and silicon belong to the same group (group 14) of the periodic table. And have four electrons in the outer energy level. Both occur in two oxidation states, +2 and +4.

Hence, option A is correct.

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Answer:

46.839728  grams of water

Explanation:

1 mole is equal to 1 moles H2O, or 18.01528 grams

18.01528 times 2.6 = 46.839728

There are 46.839728  grams h20 in 2.60 mol of the compound

Answer:

The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. ... The diagram is used by biologists to determine the probability of an offspring having a particular genotype.

Explanation:

in biology it predicts the possible offspring provided the features of the mother or father

Answer:

4.457 × 10²⁴ molecules H₂S

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

252.3 g H₂S

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of H - 1.01 g/mol

Molar Mass of S - 32.07 g/mol

Molar Mass of H₂S - 2(1.01) + 32.07 = 34.09 g/mol

Step 3: Convert

[tex]252.3 \ g \ H_2S(\frac{1 \ mol \ H_2S}{34.09 \ g \ H_2S} )(\frac{6.022 \cdot 10^{23} \ molecules \ H_2S}{1 \ mol \ H_2S} )[/tex] = 4.45688 × 10²⁴ molecules H₂S

Step 4: Check

We are given 4 sig figs. Follow sig fig rules and round.

4.45688 × 10²⁴ molecules H₂S ≈ 4.457 × 10²⁴ molecules H₂S

Answer:

[tex]\boxed {\boxed {\sf 4.457*10^{24} \ molecules \ H_2S}}[/tex]

Explanation:

First, find the molar mass of H₂S

Use the Periodic Table to find the mass of hydrogen and sulfur.

To find the molar mass of H₂S, multiply the molar mass of the elements by the number of atoms of the element.

Add.

Next, find the number of moles in the sample (252.3 g)  Use the ratio of grams to moles.

[tex]252.3 / g * \frac{1 \ mol \ H_2S}{34.086 \ g }[/tex]

Multiply. The grams will cancel each other out.

[tex]\frac{252.3 / mol }{34.086 \ }=7.40186587 \ mol[/tex]

Finally, found the number of molecules using Avogadro's number (There are 6.022*10²³ molecules in 1 mole).

[tex]7.40186587 \ mol \ H_2S*\frac{6.022*10^{23} molecules \ H_2S}{1 \ mol \ H_2S}[/tex]

Multiply. The mole (mol) will cancel each other out.

[tex]7.40186587*{6.022*10^{23}\ molecules \ H_2S} = 4.45740363 *10^{24} \ molecules \ H_2S[/tex]

Round to the correct number of significant figures. The sample had 4 sig figs (2, 5, 2, 3), so round to 4 sig figs.

[tex]4.457*10^{24} \ molecules \ H_2S[/tex]

There are about 4.457 * 10²⁴ molecules of H₂S

Answer:

The object Genesis sees is black.

Explanation:

The color an object reflects represents what the object's color is. For example, if a block reflects blue light, then only blue light is sent to our eyes, and hence we see the block as blue.

If an object absorbs all visible light waves, then, that means there's no visible light reflected, and we cannot see any color the object has. Hence, it is black in our eyes.

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Answer:

I think its digestive

Explanation:

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Answer:

6.83 × 10^–2 mol NO

Explanation:

The number of moles of nitric oxide NO produced from a reaction if its mass is 2.05 is equal to 0.0683 mol.

A mole is represented by the symbol mol and can be defined as a scientific unit that is used to measure the amount of the substance. The substance can commonly be chemical entities but they are individually distinct.

A mole of the substance can be used to evaluate a large number of constituent particles. The amount of substance can be measured in terms of chemical entities of a substance in a sample.

The number of elementary units in 1 mole of a substance is equal to 6.023×10²³ which is called Avogadro’s constant.

Given,  the mass of the Nitric oxide, NO = 2.05 g

The mass of one mole of Nitric oxide, NO = 30 g

We can calculate moles of the substance as, n = Mass/molar mass

Then, the number of moles of Nitric oxide, NO = 2.05/30 = 0.0683 mol

Therefore, the number of moles of Nitric oxide, NO is 0.0683 mol.

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Answer:

An anion has more electrons than protons, consequently giving it a net negative charge .

hope it helps!

Answer:

yes air pollution can affect a plants health

Explanation:

Answer:

fitness. the ability of an organism to survive and reproduce in its environment. adaptation. the inherited characteristic that increases an organism's chance of survival.

An inherited characteristic of an organism is called a heredity.

The term heredity refers to the genetic heritage passed down by our biological parents. It is the transmission of traits from one generation to another generation. These traits can be physical, such as eye colour, blood type or a disease, or behavioral.

Heredity is also called biological inheritance, is the exiting of of traits from parents to their offspring either through asexual reproduction or sexual reproduction.

Heredity is a process in which organisms develop characteristics from their parents. These characteristics are called traits. Inheritance is the transmission of information from one generation of individuals to the next.

Thus, An inherited characteristic of an organism is called a heredity.

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Explanation:

Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. In nature, crystals can form when liquid rock, called magma, cools.

Answer: Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. In nature, crystals can form when liquid rock, called magma, cools.

Explanation: Can i have BrainLiest

Answer:

about 12 pounds

Explanation:

Answer:

10.91 pounds

Explanation:

That is because an object or person on the moon would weigh 16.5% its weight on earth.

Answer:

One Valence Electron

Explanation:

It is classified as an alkali metal. Potassium atoms have 19 electrons and 19 protons with one valence electron in the outer shell. Potassium is considered chemically similar to sodium, the alkali metal above it on the periodic table. Under standard conditions potassium is a soft silvery-white metal.

Answer:

It must be a part of a eukaryote

Explanation:

Eukaryotic cells are larger than prokaryotic cells and have a “true” nucleus, membrane-bound organelles, and rod-shaped chromosomes. The nucleus houses the cell's DNA and directs the synthesis of proteins and ribosomes.

Answer:

7.5031055900621

Explanation:

D= M/V

Answer:

1.34 moles SO₂(g)

Explanation:

At STP 1 mole of any gas occupies 22.4 Liters. So, for 30 Liters ...

moles SO₂(g) = 30L/22.4L·mol⁻¹ = 1.34 moles SO₂(g)

Answer:

Ca-197

Ga-135

Cu-128

Fe-126

Br-114