I need Help Please !!!!!​

Answer:

Graham's law states that the rate of effusion or of diffusion of a gas is inversely proportional to the square root of its molecular weight. So, rate of diffusion of hydrogen gas is four times faster than oxygen gas.

Explanation:

Answer:

Rate of diffusion of hydrogen is higher than other gases because mass of hydrogen is very small and it diffuses easily.

Explanation:

Answer:

A. Natural Gas is a substance that is a source of hydrocarbons.

Explanation:

Answer:

option A . hope it helps , thanks

the element sodium has 1,000,000 million energy levels. in an electrically neutral sodium atom- there are 3 energy levels.

Answer:

Sodium has 11 electrons. The first two fill the innermost energy level. The second energy level is also full, holding eight electrons and one electron remaining in the outer energy level. It is the number of outer electrons that give an element its chemical properties.

Explanation:

Answer:

No answer choices but Chemical changes are changes in which can't be undone an example would be a rotting food(won't be fresh ever again) or burning paper(ashes are ashes not paper)

Explanation:

Hope this helps :D

Answer:

Explanation:

.

Answer:

For producing 0.55 mole of acetic acid, 0.55 mole of ethanol is required.

Explanation:

The balanced equation for this reaction is

CH3CH2OH + O2 --> CH3COOH + H2O

As we can see in this equation, the ration of number of moles of acetic acid to the number of moles of ethanal is equal to [tex]1 : 1[/tex]

Hence, in order to produce one mole of acetic acid, 1 mole of ethanol is required.

Thus, for producing 0.55 mole of acetic acid, 0.55 mole of ethanol is required.  

Answer:

Any characteristic that can be determined without changing the substance's chemical identity. chemical property: Any characteristic that can be determined only by changing a substance's molecular structure

Explanation:

Answer:

atomic mass

Explanation:

protons and neutrons have mass; electrons do not (or at the very least have negligible mass by comparison)

Answer:

Explanation:

A) 0.150

B) 0.300

C) 0.450

hope it helps:)

Answer:

i think its both objects have to have mass

Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, the correct option is option D.

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.

Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.

So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. For a gravitational field to be generated between two objects, Both objects must have mass.

Therefore, the correct option is option D.

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Answer:

2.9 moles of aluminum sulfate will be produced from the reaction of 5.8 moles of aluminum hydroxide and excess sulfuric acid.

Explanation:

The balanced reaction is:

2 Al(OH)₃ + 3 H₂SO₄ → Al₂(SO₄)₃ + 6 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

Then you can apply the following rule of three: if by reaction stoichiometry 2 moles of Al(OH)₃ produce 1 mole of Al₂(SO₄)₃, then 5.8 moles of Al(OH)₃ how many moles of Al₂(SO₄)₃ will they produce?

[tex]moles of Al_{2} (SO_{4} )_{3} =\frac{5.8moles of Al(OH)_{3} *1 mole of Al_{2} (SO_{4} )_{3}}{2moles of Al(OH)_{3}}[/tex]

moles of Al₂(SO₄)₃= 2.9

2.9 moles of aluminum sulfate will be produced from the reaction of 5.8 moles of aluminum hydroxide and excess sulfuric acid.

Answer:

67

Explanation:

because that right

Answer:

3.26×10⁵ L

Explanation:

From the question given above, the following data were obtained:

Initial volume (V₁) = 3.5×10⁵ L

Initial temperature (T₁) = 27 °C

Initial pressure (P₁) = 101 KPa

Final temperature (T₂) = –10 °C

Final pressure (P₂) = 95 KPa

Final volume (V₂) =?

Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:

T(K) = T(ºC) + 273

Initial temperature (T₁) = 27 °C

Initial temperature (T₁) = 27 °C + 273

Initial temperature (T₁) = 300 K

Final temperature (T₂) = –10 °C

Final temperature (T₂) = –10 °C + 273

Final temperature (T₂) = 263 K

Finally, we shall determine the new volume of the tank. This can be obtained as follow:

Initial volume (V₁) = 3.5×10⁵ L

Initial temperature (T₁) = 300 K

Initial pressure (P₁) = 101 KPa

Final temperature (T₂) = 263 K

Final pressure (P₂) = 95 KPa

Final volume (V₂) =?

P₁V₁ / T₁ = P₂V₂ / T₂

101 × 3.5×10⁵ / 300 = 95 × V₂ / 263

117833.333 = 95 × V₂ / 263

Cross multiply

95 × V₂ = 117833.333 × 263

95 × V₂ = 30990166.6

Divide both side by 95

V₂ = 30990166.6 / 95

V₂ = 3.26×10⁵ L

Thus, the new volume of the tank is 3.26×10⁵ L

Answer:

B

Explanation:

And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This allows the water molecule to become attracted to many other different types of molecules.

Answer:

I believe it's B

Explanation:

Water can dissolve with any that's why it's universal and can dissolve substancrs more than any other Liquid.

please give me brainliest!

hope this helps

Answer:

Ps5

Explanation:

Answer:

well the answer to that is  climate change

Explanation:

because with climate change the temperature and hot and cold it is depending on where you live

Answer:

Mg(s) + 2NaF (aq) —> MgF₂ (aq) + 2Na(s)

Explanation:

Magnesium => Mg

Sodium fluoride => NaF

Magnesium fluoride => MgF₂

Sodium metal => Na

The equation can be written as:

Mg + NaF —> MgF₂ + Na

Thus, the above equation can be balance as illustrated below:

Mg + NaF —> MgF₂ + Na

There are 2 atoms of F on the right side and 1 atom on the left side. It can be balance by writing 2 before NaF as shown below:

Mg + 2NaF —> MgF₂ + Na

There are 2 atoms of Na on the left side and 1 atom on the right side. It can be balance by writing 2 before Na as shown below:

Mg + 2NaF —> MgF₂ + 2Na

Mg(s) + 2NaF (aq) —> MgF₂ (aq) + 2Na(s)

Now, the equation is balanced.

Answer:

26

Explanation:

Answer:

A variety of household products are hazardous. Motor oil, pesticides, oil-based paints, mothballs, flea collars, weed killers, and some household cleaners

Answer:

Its yellow

Explanation:

When i took the unit practice test it said the correct answer was yellow sooooo

The component of white light that bends the least under refraction by a glass prism is red.

White lights usually have 7 components which include red, orange, yellow, green, blue, and violet.

When light rays pass from one medium to another, is bends due to a difference in the density of the media. This is called refraction.

The components of white light bend when they pass through a glass prism. The extent of bending of each component is dependent on the wavelength of each color.

Red light has the longest wavelength and is thus refracted the least while violet with the shortest wavelength is refracted the most.

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1.4 g Co(OH)₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Unit 0

Atomic Structure

Aqueous Solutions

Stoichiometry

Step 1: Define

[RxN - Balanced] CoCl₂ + 2NaOH → 2NaCl + Co(OH)₂

[Given] 10.0 mL, 1.5 M CoCl₂

[Solve] grams Co(OH)₂

Step 2: Identify Conversions

[Base 10] 1000 mL = 1 L

[RxN] 1 mol CoCl₂ → 1 mol Co(OH)₂

[PT] Molar Mass of Co - 58.93 g/mol

[PT] Molar Mass of O - 16.00 g/mol

[PT] Molar Mass of H - 1.01 g/mol

Molar Mass of Co(OH)₂ - 58.93 + 2(16.00) + 2(1.01) = 92.95 g/mol

Step 3: Stoich

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs as our lowest.

1.39425 g Co(OH)₂ ≈ 1.4 g Co(OH)₂

Answer:

1.4 g Co(OH)₂

Explanation:

Molar mass of Co(OH)₂ = (58.9 + 16.0×2 + 1.0×2) g/mol = 92.9 g/mol

According to the given equation, mole ratio CoCl₂ : Co(OH)₂ = 1 : 1

No. of moles of CoCl₂ reacted = (1.5 mol/L) × (10.0/1000 mol) = 0.015 mol

No. of moles of Co(OH)₂ precipitated = 0.015 mol

Mass of Co(OH)₂ precipitated = (0.015 mol) × (92.9 g/mol) = 1.39 g / 1.4g

====

OR:

(1.5 mol CoCl₂ / 1000 mL CoCl₂ solution) × (10.0 mL CoCl₂ solution) × (1 mol Co(OH)₂ / 1 mol CoCl₂) × (92.9 g Co(OH)₂ / 1 mol Co(OH)₂)

= 1.39 g Co(OH)₂ / 1.4 g Co(OH)₂

Answer:

Chemical change

Explanation:

There are types of changes in nature namely: physical change and chemical change. A physical change is a change that does not alter the chemical composition of the substances involved, hence, no new substances are formed. On the other hand, a chemical change changes the chemical composition of the involved substances to form new substances.

Based on the definition of the types of changes below, the equation depicted in this question is a CHEMICAL CHANGE because it involves a rearrangement of the atoms of each element in the reactants to produce new sets of products with a new chemical formula.

C17H17ON3(s) + 2C4H6O3(l) → C21H21O5N(s) + 2C2H4O2(l)

Answer:

It is possible she could get one.

Explanation:

To solve this problem we need to convert 98.3 kilometers/hour to miles/hour.

In other words, we convert km to mi, to do so we multiply 98.3 km by a conversion factor, putting the unit we want to have in the numerator, and the unit we want to convert in the denominator:

Given that the little old lady is doing 61 miles/hour, she could get a speeding ticket.

Answer:

The answer is "164.2726 g "

Explanation:

Equation:

The molar weight of

The mol in

The molar weight of

The moles in

The ratio in the equation is 3:1 so,   limits reaction  the ratio is 3:1 therefore,  0.392456 mol of were reacted

The molar mass of the

[tex]mass= mol \times Molar \ Weight[/tex]

         [tex]= 418.576 \times 0.392456 \\\\= 164.2726 \ g \ of \ Ag_3PO_4[/tex]

Answer:

3.384364 time 10^24 atoms

Explanation:

multiply by avogadro's number

Answer:

The answer for 10 times 20 is 200

Explanation:

Why... Because what is 1 times 2=2 so add the left over zero I'm that your answer!

Answer:

NaCl, H2O

Explanation:

Compounds are substances that contain atoms of two or more different elements.

Answer: [tex]H_2O_2\rightarrow H_2+O_2[/tex]

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical equation for showing hydrogen peroxide decomposing into hydrogen and oxygen is:

[tex]H_2O_2\rightarrow H_2+O_2[/tex]

Answer:

Condensed equation:  [tex]3K_2CrO_4(aq)+2Fe(NO_3)_3(aq)\rightarrow Fe_2(CrO_4)_3(s)+6KNO_3(aq)[/tex]

Complete ionic equation : [tex]6K^+(aq)+3CrO_4^-(aq)+2Fe^{2+}(aq)+6NO_3^-(aq)\rightarrow Fe_2(CrO_4)_3(s)+6K^+(aq)+6NO_3^-(aq)[/tex]

Net ionic equation :   [tex]3CrO_4^-(aq)+2Fe^{2+}(aq)\rightarrow Fe_2(CrO_4)_3(s)[/tex]

 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 chemical equation is:

[tex]3K_2CrO_4(aq)+2Fe(NO_3)_3(aq)\rightarrow Fe_2(CrO_4)_3(s)+6KNO_3(aq)[/tex]

Condensed equation : [tex]3K_2CrO_4(aq)+2Fe(NO_3)_3(aq)\rightarrow Fe_2(CrO_4)_3(s)+6KNO_3(aq)[/tex]

Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.

[tex]6K^+(aq)+3CrO_4^-(aq)+2Fe^{2+}(aq)+6NO_3^-(aq)\rightarrow Fe_2(CrO_4)_3(s)+6K^+(aq)+6NO_3^-(aq)[/tex]

Net ionic equation : In the net ionic equations, we are not include the spectator ions in the equations.  Spectator ions are the ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

[tex]3CrO_4^-(aq)+2Fe^{2+}(aq)\rightarrow Fe_2(CrO_4)_3(s)[/tex]