help help help pls pls pls​

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:

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:

I would go with C

Explanation:

Because if in a group of scientists, the people that are educated with different experiences will be helpful to invent a new thing by giving their own ideas and mixing them.

Hope i got to be Helpful!

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:

B

Explanation:

Answer:

A. By their texture

Explanation:

Rocks can be classified their texture.

Answer:

ok

Explanation:

I accutly don't know the answer sorry

Answer:

7.5031055900621

Explanation:

D= M/V

Answer: The coefficient  in front of sodium hydroxide is 2.

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

the balanced reaction between sodium hydroxide and copper (II) sulphate is :

[tex]2NaOH+CuSO_4\rightarrow Na_2SO_4+Cu(OH)_2[/tex]

Thus the coefficient  in front of sodium hydroxide is 2.

Answer:

constant speed or a horizontal line is an rest

Explanation:

Answer:

(C) Ultraviolet Radiation

Explanation:

Answer:

The correct answer is ( C- ultraviolet radiation )

Explanation:

Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10nm (with a corresponding frequency around 30 PHz) to 400 nm (750 THz), shorter than that of visible light, but longer than X-rays.

The equation that has been following the law of conservation has been [tex]\rm H_2\;+\;Cl_2\;\rightarrow\;2\;HCl[/tex]. Thus, option D is correct.

The law of conservation of mass states that in a chemical equation, the atoms of reactants and atoms of products for each elements are equal.

In the given reactions,

A. [tex]\rm H_2\;+\;Cl_2\;\rightarrow\;HCl[/tex]

The equation has 2 atoms of hydrogen and chlorine at reactant side, while 1 atom on product side. Thus, the equation does not follow the law of conservation.

B. [tex]\rm H_2\;+\;O_2\;\rightarrow\;H_2O[/tex]

The equation has 2 atoms of hydrogen and oxygen at reactant side, while 1 atom on product side. Thus, the equation does not follow the law of conservation.

C. [tex]\rm H_2\;+\;O_2\;\rightarrow\;2\;H_2O[/tex]

The equation has 2 atoms of hydrogen and oxygen at reactant side, while 2 atoms of oxygen and 4 atoms of hydrogen on product side. Since, the equation has imbalanced hydrogen it does not follow the law of conservation.

D. [tex]\rm H_2\;+\;Cl_2\;\rightarrow\;2\;HCl[/tex]

The reaction has 2 atoms of hydrogen and chlorine at reactant side, and 2 atom of each on product side. Thus, the equation does follow the law of conservation.

The equation that has been following the law of conservation has been [tex]\rm H_2\;+\;Cl_2\;\rightarrow\;2\;HCl[/tex]. Thus, option D is correct.

For more information about the conservation of mass, refer to the link:

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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.

Hope this helped!

Answer:

urm is that an answer lol

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:

20 grams

Explanation:

40g= 300

x = 150

cross multiply, 40*150/300

6000/300= 20g

Answer:

B. By dissolving 2 moles of the compound in 1 L of water.

Answer:

b

Explanation:

a pe x :)

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

Answer:

Model D

Explanation:

Bohr's Model has a planetary look. Where the electrons are in an orbit.

Answer:

The answer is model D

Answer:

chemical reaction

Explanation:

i think i have tried

Answer:

The substance's heat changes.

Explanation:

Substances can be made to change phases by fluctuating the temperature, the pressure, or both.

Answer:

yes air pollution can affect a plants health

Explanation:

Answer:

y

Explanation:

Answer:

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Explanation:

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: mass

Explanation: the protons and neutrons make up the nucleus and nearly the entire mass of the atom

Answer:

Chemical change

Explanation:

Hi again. The lactose in the milk is converted to lactic acid by microbes. It has turned into a new substance that is irreversable.