9. Calculate the specific heat capacity of titanium if a 43.56 g sample absorbs 0.476 kJ as its temperature changes from 20.5 oC to 41.2 oC.

Answer:

Mass =  142.25 g

Explanation:

Given data:

Mass of Ca(OH)₂ = ?

Number of moles of Ca(OH)₂ = 1.92 mol

Solution:

Formula:

Mass = number of moles × molar mass

Molar mass of Ca(OH)₂ = 74.09 g/mol

by putting values,

Mass = 1.92 mol × 74.09 g/mol

Mass =  142.25 g

Answer:

lithium 1+

magnesium 2+

aluminum 3+

chloride 1-

oxygen 2-

nitrogen 3-

hope this helps!

Explanation:

for plato users :)

The ionic charges for the given elements are Lithium (Li) + 1, Magnesium (Mg) + 2, Aluminum (Al) +3, Chlorine (Cl)  -1, Oxygen (O) -2, and Nitrogen (N) -3.

The ionic charge can be defined as the oxidation state of the chemical species. The cation carries a positive charge while Anion carries a negative charge. The number of electrons in ions present depends on the charge carried by ions.

In the periodic table, the elements from the left side are electropositive and act as metals.  The metals can donate one or more electrons thus they carry a positive charge on them.

In the periodic table, the elements from the right side are electronegative and act as non-metals. The non-metals can accept one or more electrons thus they carry a negative charge on their ions.

Lithium (Li), magnesium (Mg), and aluminum (Al) donate electrons in their valence shell and carry + 1, +2, and +3 ionic charge respectively. Chlorine (Cl), oxygen (O), and nitrogen (N) accept electrons in their valence shell and carry - 1, -2, and -3 ionic charge respectively.

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Answer:

340 N

Explanation:

Force formula

The force formula is defined by Newton's second law of motion: Force exerted by an object equals mass times acceleration of that object: F = m ⨉ a. To use this formula, you need to use SI units: Newtons for force, kilograms for mass, and meters per second squared for acceleration.

Equilibrium

It is a state of rest or balance due to the equal action of opposing forces. equal balance between any powers, influences, etc.; equality of effect. mental or emotional balance; equanimity: The pressures of the situation caused her to lose her equilibrium.

The given chemical equation, 2N₂ + 3H₂ <==>2NH3, is an example of a reversible reaction.option A.

The double arrows between the reactants and products indicate that the reaction can proceed in both directions, forming both products and reactants.The reversible reaction, also known as a chemical equilibrium reaction, refers to a chemical reaction that can occur in both forward and reverse directions. It occurs when reactants are converted into products, and the products are also converted back into the original reactants.A reversible reaction can be identified by the symbol “<==>” or “⇌” that appears between the reactants and products in the chemical equation. It denotes that the reaction is in a state of chemical equilibrium. When the reactants and products have achieved equilibrium, the rate of the forward and reverse reactions is equal, and there is no further net change in the amounts of the reactants and products.A combustion reaction is a type of exothermic reaction in which a substance reacts with an oxidizing agent to produce heat and light. A one-way reaction is a type of reaction that occurs in only one direction and cannot be reversed without significant changes to the reaction conditions, such as changing the temperature or pressure.A reversible reaction, unlike a one-way reaction, can occur in both directions and reach equilibrium when the forward and reverse reaction rates are equal.option A.

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Answer:

Explanation:

A polarimeter fundamental working principle entails the following: By passing light via a polarizer, one can produce light with a precisely prepared linear polarisation state.

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Answer:

See Explanation

Explanation:

Positrons are often called positive electrons. They have the same mass and magnitude of charge as the electron but are of opposite sign. This means that they are positively charged while electrons are negatively charged.

In positron emission, a proton is converted into a neutron and a positron. The anti neutrino is a particle that balances the spins.

In electron capture, an electron is converted to a neutron. The anti neutrino is a particle that balances the spins.

When transmutation occurs by positron emission, the mass number of the of the parent nucleus is the same as mass number of the daughter nucleus but the atomic number of daughter nucleus decreases by 1 while the neutron/proton ratio increases.

When transmutation occurs by electron capture, the mass number of the of the parent nucleus is the same as mass number of the daughter nucleus but the atomic number of daughter nucleus decreases by 1 while the neutron/proton ratio increases.

Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

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Answer: Have a nice dAy?

Explanation: I thought i knew but nvm sorry

Answer:

53.5gram.

Explanation

Explanation: number of moles = number of molecule ÷ avogadro's number. => moles = 6.022 × 10²³ ÷ 6.022 × 10²³ = 1 mole. mass of 1 mole of NH4Cl = 1 × molar mass.

Answer:

b.  1.9 × 10-3

Explanation:

Answer:1.9x10-3

Explanation:

average

The volume of carbon dioxide produced is approximately (d) 11.9 liters.

To determine the amount of carbon dioxide (C\(O_2\)) produced when 37.8 grams of carbon disulfide (C\(S_2\)) reacts with excess oxygen gas (\(O_2\)), we need to use stoichiometry and the given balanced chemical equation:

C\(S_2\)(l) + 3\(O_2\)(g) → C\(O_2\)(g) + 2S\(O_2\)(g)

First, we calculate the number of moles of C\(S_2\) using its molar mass:

Molar mass of (C\(S_2\)) = 12.01 g/mol (C) + 32.07 g/mol (S) × 2 = 76.14 g/mol

Number of moles of (C\(S_2\)) = mass / molar mass = 37.8 g / 76.14 g/mol ≈ 0.496 mol

From the balanced equation, we can see that the stoichiometric ratio between (C\(S_2\)) and C\(O_2\) is 1:1. Therefore, the number of moles of C\(O_2\) produced will also be 0.496 mol.

Now we can use the ideal gas law to calculate the volume of C\(O_2\) at the given temperature and pressure. The ideal gas law equation is:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant (0.0821 L·atm/mol·K), and T is the temperature in Kelvin.

Converting the temperature from Celsius to Kelvin:

T(K) = 28.85°C + 273.15 = 302 K

Using the ideal gas law:

V = nRT / P = (0.496 mol) × (0.0821 L·atm/mol·K) × (302 K) / (1.02 atm) ≈ 11.9 L

The correct answer is 11.9 liters.

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Answer:

First the aqueous solution of iodine is heated mildly and then collection of the iodine crystals is done from its vapors.

Explanation:

Iodine is one of the elements that can get recovered easily from a given solution by going through the process of mild heating. For doing this, first, the aqueous solution is heated mildly over a low flame with a dish placed over the flame. As the process of mild heating continues, the fumes of the iodine start to originate that slowly get condense around the dish's cooler parts.  

With condensation, the formation of pure iodine crystals takes place. These iodine crystals can now be extracted easily by a physical method.  

Answer:

B. summer

Explanation:

The northern hemisphere experiences summer during the months of June, July, and August because it is tilted toward the sun and receives the most direct sunlight.

Sorry, your photo isn't clear enough.

Assuming the second plus sign is a typo and was meant to be a reaction arrow, this would be the balanced equation:

C3H8 + 5O2 —> 3CO2 + 4H2O

Answer:

A

Explanation:

Answer: 0.27 moles of CO2 and 11.88 grams of CO2

Explanation: Use the Ideal Gas Law, PV = nRT, substitute the values given and solve.

I can't seem to upload procedure but:

P = 1.5atm

V = 4.5L

n = moles

R = 0.0821gr/mol (when using atm, kPa is 8.31)

T = 300K

Isolate what you don't have, in this case n. Change PV = nRT to PV/RT = n. Substitute the values to get moles. Once you have this, multiply the value by the molar mass of CO2 (44gr/mol) to get the mass of CO2 in grams.

Answer:

also need help on this one

Explanation:

pls help

Answer:

you can not qq for 12 b

Explanation:

Answer: The molecular formula will be \(C_6H_6O_6\)

Explanation:

Mass of \(CO_2\) = 17.95 g

Mass of \(H_2O\)= 4.87 g

Molar mass of carbon dioxide = 44 g/mol

Molar mass of water = 18 g/mol

For calculating the mass of carbon:

In 44g of carbon dioxide, 12 g of carbon is contained.

So, in 17.95 g of carbon dioxide, =\(\frac{12}{44}\times 17.95=4.89g\) of carbon will be contained.

For calculating the mass of hydrogen:

In 18g of water, 2 g of hydrogen is contained.

So, in 4.87 g of water, =\(\frac{2}{18}\times 4.87=0.541g\) of hydrogen will be contained.

Mass of oxygen in the compound = (12.00) - (4.89+0.541) = 6.57 g

Mass of C = 4.89 g

Mass of H =  0.541 g

Mass of O = 6.57 g

Step 1 : convert given masses into moles.

Moles of C =\( \frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{4.89g}{12g/mole}=0.407moles\)

Moles of H=\(\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{0.541g}{1g/mole}=0.541moles\)

Moles of O=\(\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{6.57g}{16g/mole}=0.410moles\)

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C =\(\frac{0.407}{0.407}=1\)

For H =\(\frac{0.541}{0.407}=1\)

For O = \(\frac{0.410}{0.407}=1\)

The ratio of C : H : O = 1: 1  : 1

Hence the empirical formula is \(CHO\).

Hence the empirical formula is \(CHO\)

The empirical weight of \(CHO\) = 1(12)+1(1)+1(16)= 29 g.

If 0.25 moles has mass of 44.0 g

Thus 1 mole has mass of = \(\frac{44.0}{0.25}\times 1=176g\)

Thus molecular mass is 176 g

Now we have to calculate the molecular formula.

\(n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{176g}{29g}=6\)

The molecular formula will be=\(6\times CHO=C_6H_6O_6\)

Explanation:

Mol = g/MW

Mw of NH3 = 14 + 3(1) = 17

Mol = 34/17

= 2 mol

Answer:

The answer is 3

C2H5OH + O2 CO2 +H2O (unbalanced)

C2H5OH +3O2(g). 2CO2(g)+3H2O(balanced)

According to the balanced chemical equation, C₂H₅OH + 3 O₂\(\rightarrow\) 2 CO₂ + 3 H₂O the coefficient of oxygen is three.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Explanation 2Al2O3(s)-->4Al(s)+302(g)What is the total number of moles of O2 that are produced when 8.0 mol of Al2O3(s)are totally decomposed ? 

Answer:

52.206 kg

Explanation:

From the given information:

Mass of hexane C6H14 = \(19.3*10^3 \ g \times \dfrac{38.3}{100}\)

= 7391.9 g

Mass of octane C8H18 = \(19.3*10^3 \ g \times \dfrac{13.9}{100}\)

= 2682.7 g

Mass of decane C10H22 = \(19.3*10^3 \ g \times \dfrac{47.8}{100}\)

= 9225.4 g

However, recall that:

number of moles of an atom = mass/molar mass

∴

For hexane, no of moles = 7391.9 g/86.18 g/mol

= 85.77 moles

For octane, no of moles = 2682.7 g/114.23 g/mol

= 23.49 moles

For decane, no of moles = 9225.4 g/142.29 g/mol

= 64.84 moles

Therefore:

number of moles of CO2 produced = (6 × 85.77)+(23.49)+(10×64.84) moles

= 1186.51 moles

Finally, the mass of CO2 produced is:

= 1186.51 mol × 44 g/mol

= 52206.44  g

= 52.206 kg

Answer:

The answer is A and B

Explanation:

Biotechnology is the use of living organisms or other biological systems in the manufacture of drugs or other products or for environmental management, as in waste recycling: includes the use of bioreactors in manufacturing, microorganisms to degrade oil slicks or organic waste, genetically engineered bacteria to produce human hormones, and monoclonal antibodies to identify antigens.

Biotech offers the possibility of improving human health, the environment, and agriculture while creating more sustainable modes of production.