As a heavy metal ball rolls down a hill, it goes faster and faster. Which statement is true?

Answer:

Electrolytic cleaning is a method of removing soil, scale or corrosion products from a metal surface by subjecting it as an electrode to an electric current in an electrolytic bath. It is a form of electroplating that can be applied to all electric conductive materials.

Answer: 0.113 moles of NaCl are created as a result of decomposing 12 grams of [tex]NaClO_3[/tex].

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]   

[tex]\text{Moles of} NaClO_3=\frac{12g}{106.5g/mol}=0.113moles[/tex]

The balanced chemical equation for decomposition of [tex]NaClO_3[/tex] is:

[tex]2NaClO_3\rightarrow 2NaCl+3O_2[/tex]  

According to stoichiometry :

2 moles of [tex]NaClO_3[/tex] give = 2 moles of [tex]NaCl[/tex]

Thus 0.113 moles of [tex]NaClO_3[/tex] give =[tex]\frac{2}{2}\times 0.113=0.113moles[/tex]  of [tex]NaCl[/tex]

Thus 0.113 moles of NaCl are created as a result of decomposing 12 grams of [tex]NaClO_3[/tex].

Answer:

Fluorite

What is Fluorite? Fluorite is an important industrial mineral composed of calcium and fluorine (CaF2). It is used in a wide variety of chemical, metallurgical, and ceramic processes

Explanation:

In balancing chemical equations, the law of conservation of matter must be strictly obeyed.

By the virtue of this, the following steps are usually taken:

Answer:

the answer would be 3 4 2 1

Explanation:

Answer:

B) 1.183

Explanation:

To convert from grams (mass) to moles, we need to divide by the atomic mass (amu)..

The amu of [tex]CO_{2}[/tex]  is 44.008

52.06/44.08 = 1.182966733

This can be rounded to 1.1830 moles of CO2

1.183 moles of carbon dioxide are there in 52.06 g of carbon dioxide.

Explanation:

Given :

The 52.06 grams of carbon dioxide.

To find :

The moles of carbon dioxide.

Solution:

The mass of carbon dioxide = 52.06 g

The molar mass of carbon dioxide = 44.01 g/mol

The moles of carbon dioxide:

[tex]=\frac{52.06 g}{44.01 g/mol}=1.183 mol[/tex]

1.183 moles of carbon dioxide are there in 52.06 g of carbon dioxide.

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Answer: a. Millimeter

Explanation:

A paperclip is a small device or instrument that can be used to hold the papers or stack of papers together. The length of the paperclip can be measured using millimeter. It is equal to the thousands of meters. The millimeter is a dimension which is used to measure the very small length objects which have visible scale distances and length.

Decimeter can be used to measure the length of the object smaller than paperclips. Meter and kilometers are used for objects and distances larger than paperclip.

Answer:

first and the last one hope this helps

Explanation:

Answer:

15.12g

Explanation:

Given parameters:

Number of moles  = 0.4moles

Unknown:

Mass of the compound  = ?

Solution:

To solve this problem;

   Mass  = number of moles x molar mass

 Molar mass of NaBH₄   = 23 + 10.8 + 4(1)  = 37.8g/mol

 Mass of the compound  = 0.4 x 37.8  = 15.12g

Answer:

The answer is 15.12 g but if you are taking this test on ck12 make sure you round it to 15 like it says on the directions :) good luck

Answer:

B hope it helps

Explanation:

Answer:

C)0.19 mol/L .

Explanation:

Hello!

In this case, since the chemical reaction between sodium hydroxide and sulfuric acid is:

[tex]H_2SO_4+2NaOH\rightarrow Na_2SO_4+2H_2O[/tex]

Whereas a 1:2 mole ratio is seen between the acid and the base, we can write:

[tex]2*M_{acid}V_{acid}=M_{base}V_{base}[/tex]

In such a way, we solve for the concentration of base and plug in to obtain:

[tex]M_{base}=\frac{2*M_{acid}V_{acid}}{V_{base}} \\\\M_{base}=\frac{2*0.13mol/L*14.9mL}{20mL} \\\\M_{base}=0.19mol/L[/tex]

Thus, the answer is C)0.19 mol/L

Best regards!

Answer:

H₂SO₄

have a great day

Answer:

Explanation:

The chemical formula for Sulfuric acid​ is H₂SO₄

Answer:

D. CH3CH2COO- for CH3CH2COOH; H2PO4 - for H3PO4.

Explanation:

Hello!

In this case, since the ionization of a weak acid produces a conjugate acid, molecule to which the leaving H⁺ is added to, and a conjugate base, everything that remains after the withdrawal of the H⁺, we can note down the ionization of each acid down below:

[tex]CH_3CH_2COOH\rightleftharpoons CH_3CH_2COO^-+H^+\\\\H_3PO_4\rightleftharpoons H^++H_2PO_4^-[/tex]

Thus, we notice that the answer is D. CH3CH2COO- for CH3CH2COOH; H2PO4 - for H3PO4 because the phosphoric acid is most likely to ionize to dihydrogen phosphate ions rather than phosphate, or hydrogen phosphate ions it undergoes a stepwise ionization in which the first step is the predominant one.

Best regards!

Answer:

Sr + 02 Right arrow.2Sr0

Answer:

b

Explanation:

Answer:

Ba(NO₃)₂  +  Na₂SO₄   →  BaSO₄ + 2NaNO₃

q = 3.93 kJ

ΔH_{rxn} =  26.2 kJ/mole

Exothermic

Explanation:

Given that:

The Volume of Ba (NO₃)₂ = 100.0 mL

The molarity of Ba (NO₃)₂ = 1.50 M

The volume of Na₂SO₄ = 100.0 mL

The molarity of Na₂SO₄ = 1.50 M

From the above, the total volume of solution = 200.0 mL

Density of solution = 1 g/mL

The balanced equation can be written as:

Ba(NO₃)₂  +  Na₂SO₄   →  BaSO₄ + 2NaNO₃

We know that:

Density = mass/volume

Thus;

the mass of the solution = density × volume

= 200 × 1

= 200 g

Temperature change ΔT = T₂ - T₁

ΔT = (29.7 - 25)° C

ΔT = 4.7° C

Heat capacity c = 4.184 J/gK

∴

The amount of heat lost or gained q = m× c×ΔT

q = 200 × 4.184 × 4.7

q = 3932.96 J

q = 3.93 kJ

From the above information, we can determine the number of moles of Ba(NO₃)₂ and  Na₂SO₄

For Ba(NO₃)₂

number of moles = 0.10 × 1.50

= 0.15

For Na₂SO₄

number of moles = 0.10 × 1.50

= 0.15

∴

ΔH_{rxn} = q/number of moles

ΔH_{rxn} = 3.93/0.15

ΔH_{rxn} =  26.2 kJ/mole

From the reaction, we will notice that the temperature increased. This significantly implies that heat is evolved from the reaction. As such, the reaction is exothermic.

Answer:

The Industrial Revolution was a period of great industrialization that began in the late 18th century in Britain, leading to massive population growth and agricultural innovations, which laid the foundation for increased productivity, both with increased labor and a larger market for the products. There was a revolution in the production methods of the textile industry, especially with the advent of the steam engine and urban development, the influx of people from the countryside to the cities meant that there was an abundance of labor, which laid the foundation for the industrial cities of the nineteenth century.  The steam engine was also used in the new generation of transport, in locomotives and steamships. With the advent of steel as a building material along with a series of new discoveries in communication technology in the second half of the 19th century, the tone was set for the continued technological development of the 20th century.

Answer:

Follows are the solution to the given points:

Explanation:

Answer:

isopropanol + oxygen Right arrow. carbon dioxide + water + heat

Explanation:

Word equation:

isopropanol + oxygen    →   carbon dioxide + water + heat

Chemical equation:

2C₃H₇OH  + 9O₂       →     6CO₂ + 8H₂O + Heat

The given reaction is combustion of isopropanol. Isopropanol burn in the presence of oxygen and produced carbon dioxide and water. Heat is also produced in this reaction.

The given reaction also follow the law of conservation of mass. There are equal number of moles of each element on both side of reaction equation thus mass remain conserved.

isopropanol + oxygen Right arrow. carbon dioxide + water + heat

The following information should be considered:

Word equation:

isopropanol + oxygen    →   carbon dioxide + water + heat

Chemical equation:

[tex]2C_3H_7OH + 9O_2 \rightarrow 6CO_2 + 8H_2O + Heat[/tex]  

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Answer: NAOH

Explanation:

Answer:

In this practical, students explore the formation of esters through the ability of different alcohols to react with organic acids. Together, the class can quickly produce a range of esters on a test tube scale, with a variety of interesting smells to sample and compare

The pictured ester can be prepared by the combination of ethanol and propionic Acid. The name of the ester in the picture will be ethyl propanoate.

Chemicals called esters are created when an oxoacid reacts with a hydroxyl molecule, such as alcohol or phenol. Esters are widely used. The fatty acid esters of glycerol are the majority of naturally occurring fats and oils.

When an ester reacts with either an amine or alcohol, the reaction is referred to as aminolysis; when an ester reacts with water, it is referred to as hydrolysis of ester. Esters are primarily utilized in flavorings and fragrances, but they can also be employed as solvents in the chemical industry.

Therefore, ethanol and propionic acid can be combined to create the ester shown.

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The question is incomplete. Your most probably complete question is given below:

The image of the ester is attached below

Answer:

A. Warning

Explanation:

Out of all said choices, the best choice would be warning since it would fit the sentence the most.

"A Warning notifies you that danger is present." compared to:

"A Hazard notifies you that danger is present."

"A Safety notifies you that danger is present."

"A Danger notifies you that danger is present."

Answer:

characteristics

Explanation:

i promise becasue i am a teacher so i hope you like it

Answer: 32.4 C

Explanation: Gay-Lussac's Law or Third Gas Law states that for a constant volume, the pressure is directly proportional to absolute temperature: P alpha T; also stated as P/T = K, where K is a constant, and similarly, P1/T1 = P2/T2 .

Here P1= 100 kPa, P2=120 kPa (If pressure increases by 20 kPA), T1=27 C [Given]

Hence, T2= (T1*P2)/P1 = (27*120)/100=32.4 C [C is degree in Celcius]

The new temperature of the gas in the container when the pressure increased by 20 KPa is 87 °C

The new temperature of the gas can be obtained as follow:

P₁ / T₁ = P₂ / T₂

100 / 300 = 120 / T₂

Cross multiply

100 × T₂ = 300 × 120

Divide both side by 100

T₂ = (300 × 120) / 100

T₂ = 360 K

Subtract 273 to obtain answer in °C

T₂ = 360 – 273 K

T₂ = 87 °C

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Answer:

I'm pretty sure c......

Answer is B

The friction causes the ball to lose energy on carpets, which makes the ball bounce less. On hard floors, not as much thermal energy is lost, which is why it bounces higher.