To draw a Lewis structure for a covalent compound, begin by calculating A, the available electrons, and N, the needed electrons. What is N for silicon tetrachloride, SiCl4?

Answer:

im solving now

Explanation:

Option  D. Chemistry helps them learn the parts of the body is the reason need to understand chemistry.

Chemistry exists as the branch of science that contracts with the properties, composition, and arrangement of elements and compounds, how they can vary, and the energy that exists released or absorbed when they change.

Nurses must utilize organic chemistry to determine how the bodies of their patients metabolized glucose, and how the body responds to it. On a more complex level, nurses must cause conclusions based on their knowledge of organic chemistry to help protect the lives of their patients.

Hence, Option  D. Chemistry helps them learn the parts of the body is the reason need to understand chemistry.

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Answer:

Both Arrhenius Base and Bronsted Lowry Base

Both Arrhenius Acid and Bronsted Lowry Acid

Arrhenius Acid Only

Arrhenius Base Only

Bronsted Lowry Acid Only

Bronsted Lowry Base Only

Explanation:

Answer:

Amoeba since it can come together as a multicellular with other amoebas, but still act as one giant living cell.

Explanation: i read in a book that red-slime molds can do that. hope it wasn't too far too late recent.

Answer:

is your answe b?

Explanation:

Im really asking

Answer:

Current used = 1.90 A

Explanation:

The Faraday's first law of electrolysis states:

M = ZIt

where: M is the mass of the element deposited, Z is the electrochemical equivalence of the element, I is the amount of current required and t is the time taken.

From the given question, M = 12.3 g, t = 5.5 h (19800 s) and Z = 0.0003296 g/C.

So that,

12.3 = 0.0003296 x I x 19800

12.3 = 6.52608 I

I = [tex]\frac{12.3}{6.52608}[/tex]

 = 1.88475

I = 1.90 A

The value of the current used used is 1.90 A

Answer:

This is hard because I don’t know the answer

Explanation:

I just need points

Answer:

-1

Explanation:

Many of the common polyatomicions have an electrical charge of.

Answer:

1.21 mol KClO₃

General Formulas and Concepts:

Atomic Structure

Stoichiometry

Explanation:

Step 1: Define

Identify variables

[rxn] 2KClO₃ → 2KCl + 3O₂

[Given] 58.3 g O₂

[Solve] mol KClO₃

Step 2: Identify Conversions

[rxn] 2 mol KClO₃ → 3 mol O₂

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

Molar Mass of O₂: 2(16.00) = 32.00 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

1.21458 mol KClO₃ ≈ 1.21 mol KClO₃

The solar cycle is an about an 11-year cycle experienced by the Sun. During the solar cycle, the Sun's  behavior builds to a maximum, becoming more stormy, and its magnetic field reverses. Then, the Sun settles back down to a minimum before another cycle begins.

Hit the heart if that was what you were looking for.

Answer:

p=nRT/V

v=nRT/P

n=PV/RT

t=PV/nR

Answer:

it may also become impure,I think.

Answer:

The answer  for 2-hexene is that the structure should have 6 carbon with a double bond beginning on the 2nd carbon atom.

The answer for 1-pentyne is that the structure should have 5 carbon with triple bond beginning on the 1st carbon atom.

Explanation:

2-Hexene

The structural formula for 2-hexene will have 6 carbons because the nomenclature has a -hex prefix, which stands for 6 carbons.

The -ene suffix of the nomenclature means that the organic compound is an alkene. Alkenes are hydrocarbons that contain double covalent bond and  have the suffix -ene.

The double bond is on the 2 carbon atom because the nomenclature states that the double bond will be on the 2 carbon atom.

1-Pentyne

The structure will have 5 carbons since the -pent prefix means 5 carbons.

The structure has a triple bond because the -yne suffix means that the structure is an alkyne. An alkyne is a hydrocarbon with triple covalent bonds.

Also, the position of the triple bond is known because the nomenclature of the alkyne states that the triple bond is on the 1st carbon.  

Answer:

the answer is 1.1grams is the currect ans

According to the law of conservation of mass, 1.1 grams of calcium carbonate are formed  if 2.2 grams of CaO are used for this reaction.

According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .

Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.

Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.If 56 g CaO gives 46.2 g calcium carbonate then  2.2 g CaO will give 2.2×46.2/56=1.1 g.

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Answer:

39

Explanation:

add em up

Answer:

A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion.

Explanation:

Explanation:

hope it helps thanks❤

brainliest pls

Answer:

Explanation:

Ultimately, milk can be described as both. The actual description depends on the individual and/or company involved. For example, in many places milk if extracted from cows, bottled, and delivered to the end consumer. In this case, milk would be considered as natural because nothing has been done to change its nutritional composition. This changes when companies begin to pasteurise and homogenize the milk so that it has a longer shelf life and create different variations. The milk in this case no longer has the same nutritional composition and has been altered, and is therefore considered as processed.

Answer:

your answer is 12 hope it's correct answer

Answer:

La pregunta no es clara, asi que voy a dar una breve descripicion de la termodinamica y alguno de los fenomenos que estudia

La termodinámica es la rama de la física que estudia los sistemas en equilibrio termodinámico (es decir, aquellos sistemas que no pueden sufrir un cambio espontáneo). Particularmente, la termodinámica estudia los procesos de flujo de calor (lo podemos ver en su nombre, dinámica del calor) y se relacionan estos cambios de energía con el trabajo que es posible obtener.

Entonces, por ejemplo, la termodinámica estudia como el hielo puede cambiar de fase (a medida que aumenta su temperatura) y convertirse en agua líquida.

La termodinámica también estudia como funcionan máquinas de calor, como motores de pistones, y el trabajo que estos son capaces de realizar.

Como ejemplo final, con la termodinámica podemos estudiar cosas tan complejas como equilibrio entre distintas fases (por ejemplo, el porqué podemos tener agua y hielo en equilibrio termodinámico, un ejemplo de esto son las superficies de ríos que se congelan mientras la parte inferior sigue siendo líquida)

Esos son, entre muchísimos otros, 3 posibles efectos que suceden a nuestro alrededor, y son estudiados por la termodinámica.

Answer: static charge

Explanation:

Answer:

Explanation:

static load, also called the holding load, is the force that will be applied to the linear actuator when it is not in motion.

Answer:

Explanation:

Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Determine the percent yield when 3.78 g of ammonium sulfate forms from the reaction of 2.51 g of sulfur trioxide, 1.55 g of ammonia, and 0.804 g of water. Can you please show step by step on how you got the answer thanks!

-

First, the balanced equation:

1 SO3 + 2 NH3 + 1 H2O --> 1 (NH4)2SO4

Find the limiting reactant using molar masses and mole ratios

2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) = 0.03135 mol (NH4)2SO4

1.55 g NH3 (1 mol NH3 / 17.04 g NH3) (1 mol (NH4)2SO4 / 2 mol NH3) = 0.04548 mol (NH4)2SO4

0.804 g H2O (1 mol H2O / 18.02 g H2O) (1 mol (NH4)2SO4 / 1 mol H2O) = 0.04462 mol (NH4)2SO4

Therefore, the limiting reactant is sulfur trioxide.

Now find the theoretical yield of (NH4)2SO4.

2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) (132.16 g (NH4)2SO3 / 1 mol (NH4)2SO4) = 4.14 g (NH4)2SO4

Actual yield / Theoretical yield x 100% = Percent yield.

Therefore, percent yield = 91.3%

hoppe it helps

Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Hence,the percent yield is 91.3%.

The percentage yield displays the amount of product produced in relation to the maximum mass. The proportion of atoms in the reactants that go on to produce the intended product is determined by the reaction's atom economy.

The balanced chemical equation is as follows:

1 SO3 + 2 NH3 + 1 H2O ⇒ 1 (NH4)2SO4

Find the limiting reactant by using molar masses and mole ratios as follows:

2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3)

= 0.03135 mol (NH4)2SO4

1.55 g NH3 (1 mol NH3 / 17.04 g NH3) (1 mol (NH4)2SO4 / 2 mol NH3)

= 0.04548 mol (NH4)2SO4

0.804 g H2O (1 mol H2O / 18.02 g H2O) (1 mol (NH4)2SO4 / 1 mol H2O)

= 0.04462 mol (NH4)2SO4

Hence, the limiting reactant is sulfur trioxide.

Then, find the theoretical yield of (NH4)2SO4.

2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) (132.16 g (NH4)2SO3 / 1 mol (NH4)2SO4)

= 4.14 g (NH4)2SO4

Actual yield / Theoretical yield x 100% = Percent yield.

percent yield = 91.3%

Thus, the percent yield is 91.3%.

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Answer:

this is a required answer. look it once.

Answer:

nooooo it is not equal to it

Answer:

2. 181.25 K.

3. 0.04 atm.

Explanation:

2. Determination of the temperature.

Number of mole (n) = 2.1 moles

Pressure (P) = 1.25 atm

Volume (V) = 25 L

Gas constant (R) = 0.0821 atm.L/Kmol

Temperature (T) =?

The temperature can be obtained by using the ideal gas equation as illustrated below:

PV = nRT

1.25 × 25 = 2.1 × 0.0821 × T

31.25 = 0.17241 × T

Divide both side by 0.17241

T = 31.25 / 0.17241

T = 181.25 K

Thus, the temperature is 181.25 K.

3. Determination of the pressure.

Number of mole (n) = 10 moles

Volume (V) = 5000 L

Temperature (T) = –10 °C = –10 °C + 273 = 263 K

Gas constant (R) = 0.0821 atm.L/Kmol

Pressure (P) =?

The pressure can be obtained by using the ideal gas equation as illustrated below:

PV = nRT

P × 5000 = 10 × 0.0821 × 263

P × 5000 = 215.923

Divide both side by 5000

P = 215.923 / 5000

P = 0.04 atm

Thus, the pressure is 0.04 atm

Answer: The volume of stock solution needed is 62.5 mL

Explanation:

A solution consists of solute and solvent. A solute is defined as the component that is present in a smaller proportion while the solvent is defined as the component that is present in a larger proportion.

To calculate the volume of stock solution needed, the formula used is:

[tex]C_1V_1=C_2V_2[/tex]             ....(1)

where,

[tex]C_1\text{ and }V_1[/tex] are the concentration and volume of stock solution.

[tex]C_2\text{ and }V_2[/tex] are the concentration and volume of diluted solution.

We are given:

[tex]C_1=3.00M\\V_1=?mL\\C_2=1.25M\\V_2=150mL[/tex]

Putting values in equation 1, we get:

[tex]3.00\times V_1=1.25\times 150\\\\V_1=\frac{1.25\times 150}{3.00}\\\\V_1=62.5mL[/tex]

Hence, the volume of stock solution needed is 62.5 mL

Answer:

22

Explanation:

3x4+  5x2