russia has a variety of natural resources, including oil, natural gas, timber, iron ore, copper, and lead.

Answer:

CaCO₃(s) + 2 H⁺(aq) + 2 Cl⁻(aq) ⇒ Ca²⁺(aq) + 2 Cl⁻(aq) + H₂O(l) + CO₂(g)

Explanation:

Let's consider the molecular equation that occurs when CaCO₃(s) reacts with HCl(aq).

CaCO₃(s) + 2 HCl(aq) ⇒ CaCl₂(aq) + H₂O(l) + CO₂(g)

The complete ionic equation includes all the ions and the compounds that do not dissociate in water.

CaCO₃(s) + 2 H⁺(aq) + 2 Cl⁻(aq) ⇒ Ca²⁺(aq) + 2 Cl⁻(aq) + H₂O(l) + CO₂(g)

Answer:

Ionic bonds

Explanation:

The force of attraction between the opposite charges of the ions in an ionic compound is called an ionic bond.

An ionic bond results from the electrostatic force of attraction between oppositely charged ions.

This attraction creates an ionic or electrovalent bond.

Taking into account the reaction stoichiometry, 1.83 moles of Fe₂O₃ will react with 99.0 g of Al

In first place, the balanced reaction is:

2 Al + Fe₂O₃ → Al₂O₃ + 2 Fe

By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

It is possible to use a simple rule of three as follows: If by reaction stoichiometry 54 grams of Al react with 1 mole of Fe₂O₃, 99 grams of Al react with how many moles of Fe₂O₃?

moles of Fe₂O₃= (99 grams of Al ×1 mole of Fe₂O₃)÷54 grams of Al

moles of Fe₂O₃= 1.83 moles

Finally, 1.83 moles of Fe₂O₃ is needed.

Learn more about the reaction stoichiometry:

brainly.com/question/24741074

#SPJ1

Initial Pressure = P₁ = 0.930 atm

Final Pressure = P₂ = ?

Initial Volume = V₁= 96.2 mL

Final Volume = V₂ = 44.7 mL

Temperature = constant

If we consider that ammonia as an Ideal Gas, and since the temperature is constant we can apply Boyle's Law. It says that at constant temperature:

P₁ * V₁ = P₂ * V₂

If we divide at both sides by V₂:

P₁* V₁ / V₂ = P₂ * V₂ / V₂

On the right side we can cancel V₂ and we get:

P₁* V₁ / V₂ = P₂

P₂ = P₁* V₁ / V₂

Replacing by the values that we were given:

P2 = 0.930 atm * 96.2 mL / (44.7 mL)

P2 = 2.00 atm

So the final pressure is 2.00 atm

The most effective poison is the poison that cost $30 per gallon.

i) Hypothesis : Most expensive poison is the most effective

ii) Experiment :

Plant 12 dandelions under similar conditions which are :

Divide the 12 Dandelions into four (4) different groups labelled ;

Apply the most expensive ( $30 ) poison to group A

Apply the second most expensive ( $20 ) poison to group B

Apply $10 poison to group C

Keep group D under natural conditions

iii) Result

The Dandelions grouped in Group A will die off faster than the plants grouped in other groups. which makes the poisons that cost $30 to be most effective.

Hence we can conclude that the most effective poison is the one that cost $30 per gallon.

Learn more about Dandelion : https://brainly.com/question/878684

The statement "Each member of a homologous series differs from its nearest neighbors by 14 amu" is true of members about a homologous series.

In organic chemistry, a homologous series unveils itself as a sequential assembly of compounds exhibiting an identical functional group, boasting akin chemical traits. Within this series, the constituents can either sport a branched or unbranched structure, or deviate through the molecular formula of CH2 and a molecular mass variation of 14u.

This divergence may manifest as the elongation of a carbon chain, as observed in the linear alkanes (paraffins), or as the augmentation in the count of monomers forming a homopolymer, such as amylose.

The entities belonging to a homologous series typically embrace a fixed assortment of functional groups, thereby conferring upon them resemblant chemical and physical characteristics.

Learn about homologous series here https://brainly.com/question/1569487

#SPJ1

The heat capacity for the metals are;

Aluminum -  0.89

Copper - 0.11

Iron - 0.44

Lead - 0.12

The specific heat of a substance is denoted by the symbol "C" and is typically measured in units of J/g·°C (joules per gram per degree Celsius) or cal/g·°C (calories per gram per degree Celsius).

The specific h

We have that;

For Aluminum;

c = 4.184 * 39.85 * 4.7/11.98 * 72.9

= 783.6/873.3

= 0.89

For Copper;

c =  4.184 * 12.14 * 1.9/12.14 * 75.4

= 96.5/915.3

= 0.11

For Iron

c =  4.184 * 40.24 * 2.4/12.31 * 75.1

= 404.1/924.5

= 0.44

For Lead

c = 4.184 * 39.65 * 0.7/12.46 * 76.7

c = 116.1/955.68

= 0.12

Learn more about specific heat:https://brainly.com/question/31608647

#SPJ1

Step 1 - What is molar fraction?

The molar fraction of a substance can be obtained by dividing its number of moles by the total number of moles in the solution (i.e., moles of solute + solvent):

Step 2 - Calculating the molar fraction of urea

Let's calculate the number of moles for each substance in the solution (water and urea). In order to do so, we just have to divide their mass by their molar mass:

The molar fraction of urea can be writen thus as:

Answer: the molar fraction of urea in this solution is 0.11

Answer:It creates a heat source on the cold water and the molecules act against each other and then it becomes steam.

Explanation:I had to take this on a test.

Cu + O2 --->  CuO2 -The first reaction is a combustion reaction

2 HCl + Mg → H2 + MgCl2- The second reaction is a Single replacement reaction

A combustion reaction is a type of chemical reaction that occurs between a fuel and an oxidizer in the presence of heat or light, resulting in the release of energy in the form of heat and light.

In other words, it is a reaction in which a substance reacts with oxygen to produce heat and light.

Combustion reactions are important in many aspects of daily life, including the burning of fossil fuels for energy production, the combustion of wood or other materials for heating or cooking, and the combustion of fuels in internal combustion engines.

Learn more about combustion reaction:https://brainly.com/question/30562669

#SPJ1

The reagents that can be used to achieve of the following transformation is Na2Cr207, H2S04, H20 and PCC, CH2Cl2.

What is chemical reaction?

One or more chemicals, known as reactants, are changed into one or more new substances, known as products, during a chemical reaction. Chemical elements or chemical compounds constitute substances.

In the chemical reaction, 2 butanol is converted to 2 butanone by using oxidizing agent like PCC, ch2cl2 or other reagent is na2cr2o7, h2so4, h2o used this reagent where secondary alcohol is converted to ketone.

Therefore, the reagents that can be used to achieve of the following transformation is Na2Cr207, H2S04, H20 and PCC, CH2Cl2.

To learn more about chemical reaction from the given link.

https://brainly.com/question/11231920

#SPJ4

The airbag is designed to produce the volume of nitrogen gas required to fill up the airbag.

An airbag is a bag which is designed to self-inflate and serve as a cushion for the head and neck of a driver to prevent injuries when an impact occurs head-on on the car.

The gas that inflates the airbag is nitrogen which is produced from sodium azide according to equation below:

In conclusion, the design of the airbag is such that the correct amount of sodium azide is present to produce the volume of nitrogen required to fill up the airbag.

Learn more about airbags at: https://brainly.com/question/9697503

#SPJ1

The Percentage Yield is 63.9%

Hello

To solve this problem, we would calculate the theoritical yield of the reaction first.

The theoritical yield of the reaction can be calculated using the equation of reaction.

Given that 2 moles of C₂H₂ will produce 4 moles of CO₂

This implies that

2*26g (from molar mass of C₂H₂) will produce 4*44g of CO₂

52g of C₂H₂ = 176g of CO₂

21.5g of C₂H₂ = xg of CO₂

cross multiply and solve for x

From the calculation above, the theoritical yield of CO₂ is 72.77g

Let's use this information and solve for the percentage yield.

This is the ratio between the actual yield to the theoritical yield and multiplied by 100.

Mathematically,

Data;

Actual yield = 46.5g

Theoritical yield = 72.77g

percentage yield = ?

From the calculations above, the Percentage Yield is 63.9%

The number of grams of ammonium nitrate (NH₄NO₃) it would take for all the barium hydroxide to react is 18.7g

First, we will write the balanced chemical equation for the reaction

The balanced chemical equation for the reaction is

Ba(OH)₂ + 2NH₄NO₃ → 2NH₄OH + Ba(NO₃)₂

This means, 1 mole of barium hydroxide is required to react with 2 moles of ammonium nitrate

Now, we will calculate the number of moles of barium hydroxide present.

Mass of barium hydroxide (Ba(OH)₂) = 20 g

Using the formula

\(Number\ of\ moles = \frac{Mass}{Molar\ mass}\)

Molar mass of Ba(OH)₂ = 171.34 g/mol

∴ Number of moles of Ba(OH)₂ present =\(\frac{20}{171.34}\)

Number of moles of Ba(OH)₂ present = 0.116727 mole

Now,

Since 1 mole of barium hydroxide is required to react with 2 moles of ammonium nitrate

Then,

0.116727 mole of barium hydroxide will react with 2 × 0.116727 mole of ammonium nitrate

2 × 0.116727 = 0.233454 mole

∴ Number of moles of NH₄NO₃ required is 0.233454 mole

Now, for the mass of ammonium nitrate (NH₄NO₃) required

From the formula

Mass = Number of moles × Molar mass

Molar mass of NH₄NO₃ = 80.043 g/mol

∴ Mass of NH₄NO₃ required = 0.233454 × 80.043

Mass of NH₄NO₃ required = 18.68636 g

Mass of NH₄NO₃ required ≅ 18.7g

Hence, the number of grams of ammonium nitrate (NH₄NO₃) it would take for all the barium hydroxide to react is 18.7g

Learn more on determining mass of reactant required here: https://brainly.com/question/11232389

For question 3 and question 4, we have:

a) The mass of aluminum sulfate in a sample that has 1.14 moles of sulfate anions is 130 g.

b) The mass of copper(II) sulfate pentahydrate in a sample that has 6.62 g of copper is 26.01 g.

a) The chemical formula of aluminum sulfate is Al₂(SO₄)₃.

So, in 1 mol of Al₂(SO₄)₃ we have 2 moles of Al³⁺ (aluminum cations) and 3 moles of SO₄²⁻ (sulfate anions). If we have 1.14 moles of sulfate anions, then the number of moles of aluminum sulfate is:

\(n_{Al_{2}(SO_{4})_{3}} = \frac{1\: mol_{Al_{2}(SO_{4}^{2-})_{3}}}{3 \:moles_{SO_{4}^{2-}}}*1.14 \:moles_{SO_{4}^{2-}} = 0.38 \:moles\)

Now, we can find the mass of Al₂(SO₄)₃:      

\( m_{Al_{2}(SO_{4})_{3}} = n_{Al_{2}(SO_{4})_{3}}*M = 0.38 moles*342.15 g/mol= 130 g \)

Hence, the mass of aluminum sulfate is 130 g.

b) The chemical formula of copper(II) sulfate pentahydrate is CuSO₄·5H₂O.

Since in 1 mol of CuSO₄·5H₂O we have 1 mol of Cu²⁺, the mass of CuSO₄·5H₂O can be calculated as follows:

\( m_{CuSO_{4}\cdot 5H_{2}O} = \frac{1 \:mol_{CuSO_{4}\cdot 5H_{2}O}}{1 \: mol_{Cu}}*\frac{1 \: mol_{Cu}}{63.55 g_{Cu}}*\frac{249.68 g_{CuSO_{4}\cdot 5H_{2}O}}{1 \:mol_{CuSO_{4}\cdot 5H_{2}O}}*6.62 \:g_{Cu} = 26.01 g \)  

Therefore, the mass of copper(II) sulfate pentahydrate is 26.01 g.

You can find more about moles here: https://brainly.com/question/2293005?referrer=searchResults

I hope it helps you!  

Answer:

Answer is in the attachment

An organic substance with the chemical formula C8H16O is 4-methylcycloheptanol. It has a cycloheptane ring with a methyl group (CH3) linked to one of the carbon atoms, making it a cyclic alcohol. In the ring, the hydroxyl group (-OH) is joined to a different carbon atom.

There are seven carbon present in the ring and one carbon of methyl, so 4-methylcycloheptanol contains eight carbon in the structure.

Since this would result in C-C-C bond angles far larger than the tetrahedral angle of around 109.5°, cycloheptane is not a flat molecule. Instead, it is three-dimensional and puckered.

The structure of "4-methylcycloheptanol" is attached in the image below.

Learn more about cycloheptane, here:

https://brainly.com/question/27240679

#SPJ6

Answer:

6 g of O₂

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

2ZnS + 3O₂ —> 2ZnO + 2SO₂

From the balanced equation above,

2 moles of ZnS reacted with 3 moles of O₂.

Next, we shall determine the number of mole of O₂ required to react with 0.125 mole of ZnS. This can be obtained as follow:

From the balanced equation above,

2 moles of ZnS reacted with 3 moles of O₂.

Therefore, 0.125 mole of ZnS will react with = (0.125 × 3)/2 = 0.1875 mole of O₂.

Thus, 0.1875 mole of O₂ is needed for the reaction.

Finally, we shall determine the mass of 0.1875 mole of O₂. This can be obtained as follow:

Mole of O₂ = 0.1875 mole

Molar mass of O₂ = 2 × 16 = 32 g/mol

Mass of O₂ =?

Mass = mole × molar mass

Mass of O₂ = 0.1875 × 32

Mass of O₂ = 6 g

Therefore, 6 g of O₂ is required for the reaction.

Answer:

it is d

Explanation:

Answer: d

Explanation: i think that answer

The choice of solution has a concentration of 1.144 mol/kg molality.

Molarity corresponds to the moles of solvent divided by the amount of solution in litres, whereas molality is equal with the moles of solvent divided by the quantity of solvent in kilogrammes.

Since 1 mole of solute is present in 1 litre for the solution, which contains both the solute and the solvent, 1 molar aqueous solutions are more concentrated than one decays aqueous solutions.

To know more about molality visit:

https://brainly.com/question/26921570

#SPJ1

Answer:

insertion (addition)

Explanation:

A T was added, making the sequence shift.

Hey there,

I hope this answer solves your doubt.

Step-by-step Explanation:-

The question is asking if the bonds between Carbon and Chlorine in CCl4 will be single, double or triple bonds.

(The structure of CCl4 is attached as picture. Check it)

As per image, the structure consists of Single bonds. It is 4 single bonds.

The volume of the gas in the tank at 293K and 3.0 atm pressure is 248 L. Hence, option B is correct.

Given:

T1 = 473K

T2 = 293K

P1 = 0.92 atm

P2 = 3.0 atm

The ideal gas law equation is:

PV = nRT

where P is pressure, V is volume, n is the number of moles of gas, R is the universal gas constant, and T is temperature.

n1 = (PV)/(RT)

= (0.92 atm × 500.0 L)/(0.0821 Latm/molK × 473K)

= 10.42 mol

Use the ideal gas law again to find the final volume of the gas in the tank under high pressure:

V2 = (n1 × R × T2)/P2

= (10.42 mol × 0.0821 Latm/molK × 293K)/(3.0 atm)

= 248 L

Therefore, the volume of the gas in the tank at 293K and 3.0 atm pressure is 248 L.

To learn more about pressure, follow the link:

https://brainly.com/question/31525061

#SPJ1

Answer:

Using the ideal gas law, PV=nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature in Kelvin, we can solve for n:

n = PV/RT

We know that the initial volume is 500.0 L, pressure is 0.92 atm, and temperature is 473K. We can use this information to find the initial number of moles:

n1 = (0.92 atm x 500.0 L)/(0.08206 L atm/mol K x 473K) = 11.80 mol

Next, we can use the ideal gas law again to find the final volume. We know that the final pressure is 3.0 atm and the final temperature is 293K:

V2 = nRT2/P2

V2 = (11.80 mol x 0.08206 L atm/mol K x 293K)/3.0 atm = 95 L

Therefore, the volume of the gas at the lower temperature and higher pressure is approximately 95 L. Answer: 95 L.

The amount, in kJ, of heat needed to completely vaporize 50.0g of water at 100°C is 118.8 kJ.

The heat needed to completely vaporize 50.0g of water at 100°C can be calculated using the following formula:

q = m x Hv

where:

First, we need to convert 50.0g to moles by dividing by the molar mass of water which is approximately 18.015 g/mol3:

moles of water = 50.0 g / 18.015 g/mol moles of water = 2.776 mol

Thus:

q = (2.776 mol) x (40.65 kJ/mol) q = 112.8 kJ

In other words, 112.8 kJ of heat is needed to completely vaporize 50.0g of water at 100°C.

More on heat of vaporization can be found here: https://brainly.com/question/12625048

#SPJ1

Answer:

B I think I am pretty sure

The partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg (calculated by subtracting the partial pressure of water, 17.0 mm Hg, from the total atmospheric pressure, 750.0 mm Hg).

When a gas is collected over water, the presence of water vapor affects the total pressure observed. In this case, the total atmospheric pressure is given as 750.0 mm Hg, and the partial pressure of water vapor at 19.5°C is 17.0 mm Hg.

To determine the partial pressure of hydrogen, we need to subtract the partial pressure of water vapor from the total atmospheric pressure. Partial pressure refers to the pressure exerted by an individual gas component in a mixture. In this scenario, the collected gas is primarily hydrogen, with water vapor being the other component.

By subtracting the partial pressure of water vapor (17.0 mm Hg) from the total atmospheric pressure (750.0 mm Hg), we can find the partial pressure of hydrogen:

Partial pressure of hydrogen = Total atmospheric pressure - Partial pressure of water vapor

Partial pressure of hydrogen = 750.0 mm Hg - 17.0 mm Hg

Partial pressure of hydrogen = 733.0 mm Hg

Therefore, the partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg.

Know more about hydrogen here:

https://brainly.com/question/24433860

#SPJ8

Answer:

A.

............

Explanation:

Ductility

Answer: Industrial processes including mining and manufacturing historically have been leading causes of soil pollution. Industrial areas typically have much higher levels of trace elements and organic contaminants. This is due to intentional and unintentional releases from industrial processes directly into the environment, including to the soil, adjacent water bodies, and the atmosphere.

Explanation:

Answer:

C. sterling hope it helps

According to the problem, we need to determine whether new catalyst B would give higher yields than old catalyst A. The given data is a paired sample, because both the catalysts were experimented on 6 different batches of raw materials.

(a) Explain the experimental design.

Here the data collected is from 6 different raw materials, which were divided into two portions. Therefore, two data were obtained for each of the 6 raw materials, which implies in scientific terms that repeated data was obtained for each of the 6 raw materials. Thus, this type of design is known as Repeated-Measures Design.

(b) Carry out the appropriate t test.

For testing whether the new catalyst B will give higher yields than old catalyst A, a Paired-Sample t-test needs to be performed. The test will be performed using R Studio. The R codes and output are as below.

R CODE

# Load the Data A <- c(9,19,28,22,18,8) B <- c(10,22,30,21,23,12)  # Paired Sample t-test t.test(A,B,paired = TRUE,alternative = "less")

R OUTPUT

# Paired Sample t-test > t.test(A, B, paired = TRUE, alternative = less) Paired t-test = data: A and B t = -2.6458, df = ">

The decision rule for this test is: "If the p-value < 0.05, then reject the null hypothesis, under 0.05 level of significance; otherwise accept the null hypothesis".

Decision: As p-value (= 0.02283) < 0.05, so we decide to REJECT the null hypothesis, under 0.05 level of significance.

Conclusion: As the null hypothesis is to be rejected, so we can conclude that "there is sufficient evidence conclude that the new catalyst B gives a higher yield than old catalyst A".

(c) Construct a 95% confidence interval for the difference between catalysts A and B.

From part (b),

we have obtained the R output about the 95% confidence interval for the difference between catalysts A and B as:

Therefore, the 95% confidence interval for the difference between catalysts A and B is (-∞, -0.56).

In frequency statistics, the confidence interval (CI) is the range of estimated values ​​for an unknown parameter. Confidence intervals are computed at the specified confidence level. A 95% confidence level is the most common, but other levels such as 90% and 99% are sometimes used . The confidence level represents the proportion of corresponding CIs over time that contain the true value of the parameter. For example, 95% of all intervals computed at the 95% level must contain the true value of the parameter.

Factors that affect the width of the CI include confidence level, sample size, and within-sample variability.  All other things being equal, the larger the sample, the narrower the confidence interval. Similarly, the more varied the sample, the wider the confidence interval, and the higher the confidence level, the wider the confidence interval.

Learn more about confidence interval here : https://brainly.com/question/16742675

#SPJ4

Answer:

Ca.

Sb.

Explanation:

a. When comparing the two elements Ca and As , the more metallic element is:__________ based on periodic trends alone.

The correct option is Ca. Ca belongs to group 2 which is more easily give off it's electrons, compared to As which is a group 5 member.

c. When comparing the two elements Sb and Pb , the more metallic element is:___________ based on periodic trends alone.

The correct option here is Pb. Thhs is because ionization energy decreases down the group. Pb has a lower ionization enthalpy than Sb

Answer:

a) Ca

b) Ca

c) Pb

d) Pb

Explanation:

We must have it behind our minds that metallic properties decreases as we tend towards the right and side of the periodic table. This implies that we find more metallic species at the left hand did of the periodic table and as we tend towards the right hand side, elements become less metallic as indicated by periodic trends.

Calcium is a group 2 metal with full metallic properties while arsenic is a metalloid. Similarly, lead is a group 14 metal with full metal properties while antimony is a metalloid. Hence the answers given above.