Please help!!! Question 1 to 8

Answer:

This is not a true solution because the colloidal dispersion is not completely homogeneous, and it does not have uniform properties throughout.

Explanation:

hope i helped

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what is the chemical formula of ( methane ) ??

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Answer:

[tex]CH_4[/tex]

Explanation:

Methane is a chemical compound with the formula CH4. ( One atom of carbon and four atoms of hydrogen).

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OAmalOHopeO

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Answer:

hugsvsbsbbsnjsjsnsbsbbzbd

Answer:

3-4. I think we should research the topic, and make a assumption based on what you learned.

5-6.There are times when a scientist is unable to answer his own question. If he has taken good notes, another scientist may come along later and use his notes to find the answer. Every year there is new knowledge. The scientific method is a step-by-step process.

7-8.The final step of the scientific process is to report your results. Scientists generally report their results in scientific journals, where each report has been checked over and verified by other scientists in a process called peer review.

9-10. I don't know this one.

Answer:

On the placement of hydrogen and helium in the periodic system

H1=1

He2=2

Answer:

50000 g

Explanation:

1 kilogram (kg) is equal to 1000 grams (g).

1 kg = 1000 g

The mass m in grams (g) is equal to the mass m in kilograms (kg) times 1000:

m(g) = m(kg) × 1000

Answer:

The elements boron, silicon, germanium, arsenic, antimony, and tellurium separate the metals from the nonmetals in the periodic table. These elements, called metalloids or sometimes semimetals, exhibit properties characteristic of both metals and nonmetals.

Elements: Oxygen

Answer:

Dehydrogenation is the process by which hydrogen is removed from an organic compound to form a new chemical (e.g., to convert saturated into unsaturated compounds).

Answer:

Heterogenous

Explanation: Because its not one uniform thing.

The term that best describes Max's bowl of cereal is a heterogeneous mixture.

A heterogeneous mixture is a chemical term that refers to those mixtures in which its components can be distinguished with the naked eye.

One of the distinctive characteristics of heterogeneous mixtures is that the substances that compose them retain their properties and can be separated by physical procedures such as:

According to the above, Max's bowl is an example of a heterogeneous mixture because milk and cereals can be distinguished with the naked eye and these can be separated using a physical procedure.

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Answer:

Lysosomes are predominantly found in eukaryotic animal cells and are responsible for breaking down cellular debris

Explanation:

Answer:

A salt that is dissolved in water is called a solute

Once you have dissolved the salt - you have a solution

The water is called the solvent

Explanation:

We have that When salt dissolves completely into water the water is called a Solvent

it is important to not that once the salt compound comes into water it breaks down the molecule apart the Na on one hand and the Cl on the other hand

Once the NaCl is dissolved in to the H_2O it is known as a solute of salt

And when When salt dissolves completely into water the water is called a Solvent

Therefore

When salt dissolves completely into water the water is called a Solvent

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Explanation:

the atomic number is the number of protons in the atom

Answer:

Jupiter.

Explanation:

Jupiter has the fastest axial rotation time (day) in the list of answers, based on the fact that its day is only 10 hours long.

Answer:

Kc =[tex]\frac{[8.326x10-3]^{1} }{[1.113x10-2]^{1}[1.490x10-2]^{1} }[/tex]

Kc = 50.2059

Explanation:

1. Balance the equation

2. Use the Kc formula

Remember that pure substances, like H2 are not included on the Kc formula

The value of the equilibrium constant Kc of the reaction at the temperature of the vessel is 0.05.

Calculation,

The balanced chemical equation is given as,

                      [tex]2H_{2}O[/tex]             +         [tex]2CO[/tex]            →            [tex]2H_{2}[/tex]       +     [tex]2CO_{2}[/tex]

At t=0          1.113×[tex]10^{-2}[/tex]                 1.490×[tex]10^{-2}[/tex]                                         0

At [tex]t=t_{eq}[/tex] 1.113×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex]   1.490×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex]            8.326×[tex]10^{-3}[/tex]  

The number of moles of [tex]H_{2}O[/tex] at equilibrium  =  1.113×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex]

The number of moles of [tex]CO[/tex] at equilibrium  = 1.490×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex]

The number of moles of  [tex]CO_{2}[/tex]   at equilibrium =   8.326×[tex]10^{-3}[/tex]  

Equilibrium constant is calculated bt ratio of product of concentration of reactant by product.

K = [tex][H_{2}O]^{2}[/tex]×[tex][CO]^{2}[/tex]/[tex][CO_{2}]^{2}[/tex]

K =( 1.113×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex] )∧2× (1.490×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex])∧2/(8.326×[tex]10^{-3}[/tex])∧2

K = 0.049 ≈ 0.05

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Answer:

d cause it is

Explanation:

To do this, just take the given miles and multiply it with the ratio of molecules in the chemical equation to get your answer.

Answer:

MedlinePlus Drugs Information

Explanation:

Promethazine is in a class of medication called phenothiazines

Answer:

c i think

Explanation:

the statements that are applicable are the ones that mention HCl being a limiting reactant, or the one that includes that the maximum amount of Cl gas that can be produced is 1.74g

Answer:

38.0644 cm^2

Explanation:

Answer:

true

Explanation:

I believe that is the correct answer (if right brainiest plz)

Answer:

Precise

Explanation:

hope it helps!!!!!!!!

Answer:  A, 1.98x10^24 atoms of H

Explanation:  39.0 g of sulfur = (79.0g/32.1 g/mole) = 2.46 moles S

The balanced equation promises we'll get 2 moles H2O for every 3 moles  ofS, a molar ratio of (2 moles H2O)/(3 moles S)

(2.46 moles S)*[(2 moles H2O)/(3 moles S)] = 1.64 moles H2O

(1.64 moles H2O)*(6.02x10^23 molecules H2)/mole H2O)*(2 H atoms/H2O molecule) =  1.97x10^24 atoms of H

Answer:

d

Explanation:

it just makes alot of sense and you got this

Oxygen is a gas that belongs to the chalcogen family and is a reactive non-metal. It is an element, molecule, or pure substance. Thus, option A is correct.

A pure substance is defined as a substance that cannot be physically separated into its constituent particles. They are known to have a definite and constant chemical composition. It can be a molecule, element, or compound.

An element is atomic species that cannot be broken into simple sub-particles by chemical processes. On the other hand, if an atomic element bonds to the same or different atom it forms a molecule.

Oxygen gas is an element composed of two atoms of oxygen and is a molecule as the two atoms are linked chemically. It is also a pure substance as it contains the same element.

Therefore, option A. oxygen gas is a pure substance, an element, and a molecule.

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Explanation:

It is the total mass of protons and neutrons in an individual atom or isotope. Since, Atomic Mass is total mass of protons and neutrons in an individual atom or isotope and not the actual weight of an Atom.

this means that it exists in the form of isotopes and is generally in fraction.

Answer:

55/350

Explanation:

because the answer is in the middle of 50and 400

Answer:

in a 1 Liter flask at 850 K, the equilibrium concentration of NH3 is measured as 0.12 M. Given that ammonia decomposes according to the reaction

2 NH3(g) ⇌ N2(g) + 3 H2(g),

what is Kc for the reaction?

a. 0.16

b. 12.00

c. 1.44

d. 6.22

e. 0.75

The response is 12.00 (b). Using the equation Kc = [N2][H2]3/[NH3]2, we can find the equilibrium constant Kc for the reaction 2 NH3(g) N2(g) + 3 H2(g).

In this instance, the capacity of the flask is 1 litre, and the equilibrium concentration of NH3 is 0.12 M. Therefore, using the reaction's stoichiometry, it is possible to determine the equilibrium concentrations of N2 and H2.

Since 2 moles of NH3 break down into 1 mole of N2 and 3 moles of H2, the equilibrium concentrations of N2 and H2 are 0.06 M and 0.18 M, respectively. As a result, the equilibrium constant Kc = [N2][H2]3/[NH3]2 = (0.06)(0.18)3/0.122 = 12.00 may be computed.

Therefore, b. 12.00 is the right response. You should be aware that the equilibrium constant Kc is a value that is temperature-dependent and is only applicable at the specified temperature. As a result, Kc will have a varied value depending on the temperature. The temperature in this instance is 850 K, and the Kc value is 12.00.  

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