What are the products from the following double - replacement reaction ? BaCl 2(aq) +K 2 SO 4(aq) a . BaSO 3 and KCI b. and KClO 4 c. BaSO 3 KClO 4 d. BaSO 4 and KClO 4 e . BaSO 4 and KCI

Answer: The mass of aluminium sample is 55.4 gram

Explanation:

[tex]Q_{absorbed}=Q_{released}[/tex]

As we know that,  

[tex]Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})[/tex]

[tex]m_1\times c\times (T_{final}-T_1)=-[m_2\times c\times (T_{final}-T_2)][/tex]      

where,

[tex]m_1[/tex] = mass of aluminium = ?

[tex]m_2[/tex] = mass of water = 300.0 g

[tex]T_{final}[/tex] = final temperature = [tex]23.8^0C[/tex]

[tex]T_1[/tex] = temperature of aluminium = [tex]94.5^oC[/tex]

[tex]T_2[/tex] = temperature of water = [tex]21.0^oC[/tex]

[tex]c_1[/tex] = specific heat of aluminium = [tex]0.897J/g^0C[/tex]

[tex]c_2[/tex] = specific heat of water =  [tex]4.184J/g^0C[/tex]

Now put all the given values in equation (1), we get

[tex]-[m_1\times c_1\times (T_{final}-T_1)]=[m_2\times c_2\times (T_{final}-T_2)][/tex]

[tex]-[m_1\times 0.897\times (23.8-94.5)^0C]=[300.0g\times 4.184\times (23.8-21.0)][/tex]

[tex]m_1=55.4g[/tex]

Therefore, the mass of aluminium sample is 55.4 gram

Answer:

molar mass of  unknown monoprotic acid = 114.1 g / mole.

Explanation:

Note: This question is incomplete and lacks necessary data to solve for the required calculation. However, I have similar question on the internet and seen the question completely and will be using that data to solve for this question in order to solve required calculation. Besides that, complete question asks us to solve for molar mass of the acid used.

Note: I have attached the screenshot of the complete question, please have a look on it in the attachment below.

Calculation:

Volume = 34.81mL

34.81 mL of 0.4346 M potassium hydroxide

= 0.03481 L * 0.4346 mole / L

= 0.01513 mole.

Balance equation:

HA + KOH ----> KA + H2O

As we know from the question,

one mole HA neutralize with 1 mole KOH.

mole of unknown monoprotic acid = 0.01513 mole.

And we know that the formula for mole is:  

mole = mass / molar mass

Making molar mass as the subject:

 Molar mass = mass / mole

Molar mass = 1.726 g / 0.01513 mole

Molar mass = 114.1 g / mole.

So,  

Molar mass of  unknown monoprotic acid = 114.1 g / mole.

Answer:

Ca²⁺(aq) + S²⁺(aq) + Cd²⁺(aq) + 2Cl¯(aq) —> CdS (s) + Ca²⁺(aq) + 2Cl¯(aq)

Explanation:

CaS (aq) + CdCl₂ (aq) –> CdS (s) + CaCl₂ (aq)

The complete ionic equation for the above reaction can be obtained as illustrated below:

In solution:

CaS (aq) —> Ca²⁺(aq) + S²⁺(aq)

CdCl₂ (aq) —> Cd²⁺(aq) + 2Cl¯(aq)

CaS (aq) + CdCl₂ (aq) –>

Ca²⁺(aq) + S²⁺(aq) + Cd²⁺(aq) + 2Cl¯(aq) —> CdS (s) + Ca²⁺(aq) + 2Cl¯(aq)

Answer and Explanation:

Photosynthesis reaction involves two reactants, carbon dioxide and water. These two reactants yield two products, namely, oxygen and glucose.

Answer:

6.3moles

Explanation:

The balanced chemical equation for the decomposition of phosphorus oxychloride (POCl3) is as follows:

POCl3 → POCl + Cl2

Based on the above decomposition reaction, it shows that;

1 mol of POCl3 will decompose to give 1 mole of Cl2

Hence, 6.3 moles of POCI3 will give 6.3 moles of Cl2.

Answer:

40.kPa hope this helps....

Answer:

D₁ = 3.31 m

D₂ = 0.9 m

Explanation:

First, we will find the scaling factor of the model:

[tex]Scaling\ Factor = S.F = \frac{Distance\ between\ Earth\ and\ moon\ in\ Model}{Distance\ between\ Earth\ and\ moon\ in\ Actual}\\S.F = \frac{100\ m}{384400000\ m}\\[/tex]

S.F  = 2.6 x 10⁻⁷

Now, the diameter of 1st sphere, that is Earth will be:

[tex]D_{1} = (S.F)(Actual\ Diameter\ of\ Earth)\\D_{1} = (2.6\ x 10^{-7}\ m)(12742000\ m)\\[/tex]

D₁ = 3.31 m

Now, the diameter of 2nd sphere, that is Moon will be:

[tex]D_{2} = (S.F)(Actual\ Diameter\ of\ Moon)\\D_{2} = (2.6\ x 10^{-7}\ m)(3474200\ m)\\[/tex]

D₂ = 0.9 m

Answer:

See explanation

Explanation:

According to the question Copper is obtained from  the original alloy and the copper wire used to displace the silver.  

So,

Mass of the copper from the original alloy: (10.00 % * 1.250 g) =  0.125 g

We now need to obtain the mass of the copper from the wire, then we consider how much silver is precipitated:

Mass of silver in the alloy; 90.00 % * 1.250 g = 1.125 g

So,

Amount of silver precipitated =

1.125 / 107.9 = 0.01043 mole

From the reaction equation, it takes two moles of silver to displace one mole of copper.

Hence, the amount of copper from the wire is:  0.01043 / 2 = 0.005213 mol

And a mass of  0.005213(63.55) = 0.3313 g

Total mass of copper=  0.125 + 0.3313 = 0.456 g

Answer:

See explanation

Explanation:

Full molecular equation;

2NH3(aq) + AgNO3(aq) -------> [Ag(NH3)2]NO3(aq)

Full ionic equation

2NH3(aq) + Ag^+(aq) + NO3^-(aq) --------> [Ag(NH3)2]^+(aq) + NO3^-(aq)

Net ionic equation;

2NH3(aq) + Ag^+(aq) -------->  [Ag(NH3)2]^+(aq)

When Silver nitrate is mixed with a solution of aqueous ammonia, a white and cloudy solution was observed.

Answer:

6.19 mol H₂O

Explanation:

First, we convert 70.25 grams of NH₃ into moles, using its molar mass:

Then we convert 4.13 moles of NH₃ into moles of H₂O, using the stoichiometric coefficients of the balanced reaction:

Answer:

13 branches/tree

Explanation:

Step 1: Given data

Step 2: Calculate the total number of branches (b)

We will use the following expression.

b = l × b/l

b = 19565 leaves × 1 branch/35 leaves = 559 branch

Step 3: Calculate the number of branches per tree (b/t)

We will divide the total number of branches by the total number of trees.

559 branches/43 trees = 13 branches/tree

Answer:

292.4 g

Explanation:

First we convert 53.7 g of Al into moles, using its molar mass:

Then we convert Al moles into H₂SO₄ moles, using the stoichiometric coefficients:

Finally we convert 2.98 moles of sulfuric acid into grams, using its molar mass:

Answer:

1.) Eyewash station --> D

2.) Absorbent material --> G

3.) Fire extinguisher --> F

4.) Safety Shower --> E

5.) Biohazard container --> J

6.) Broken glass container --> I

7.) Safety goggles --> C

8.) Lab apron --> H

9.) asbestos gloves --> A

10.) Latex gloves --> B

Explanation:

In an equipped laboratory, alot of safety equipments are made available and kept in area that it could be easily accessed in the laboratory. Safety or protective equipments are those materials that helps protect a laboratory personnel while at work on the lab.

These equipments include:

--> Eyewash station: This is an equipment used in the laboratory during emergency to rinse chemical from the eye. Therefore option D is correct.

--> Absorbent material: They are used to contain small spills in the laboratory. Therefore option G is correct.

--> Fire extinguisher: This equipment is used to put out small fires. Therefore F is correct.

--> Safety Shower: This is used to rinse away chemical from clothes and on skin during emergency. Therefore option E is correct.

--> Biohazard container: This container is used to safely dispose bacteria culture, blood and other living tissues. Therefore option J is correct.

--> Broken glass container: This is used to dispose cracked, chipped or broken bottle in the laboratory. Therefore option I is correct.

--> Safety goggles: This helps to protect the eye from chemical and broken glasses. Therefore option C is correct.

--> Lab apron: This is worn by the laboratory personnel to help protect the skin from chemical and biohazards. Therefore option H is correct.

--> Asbestos gloves: these are heat resistant gloves used to protect the hands from heat. Therefore option A is correct.

--> Latex gloves: these are equally worn by the laboratory personnel to protect the hands from chemicals and biohazards

[tex]Answer :—✔[/tex]

Answer:

hello can you follow me

Explanation:

used in fire extinction, blasting rubber, foaming rubber and plastic

Answer: To be separated using GC, analytes must be volatile.

An air peak is commonly used to determine the dead time when using a TCD detector.

An FID is insensitive to non-combustible gases such as water and carbon dioxide.

A column temperature equal to or slightly above the average boiling point of the sample components results in a reasonable elution time.

Explanation:

The gas chromatography works on the principle of separation of gaseous substances based on the differences of vapor pressure. The thermal conductivity detector works on the principle of detection of effluents from the has chamber and the air peak gives indication of the retention time of the effluents. Flame ionization detector can be used for the detection of organic compounds but insensitive for the detection of halogens, non-combustible substances like carbon dioxide and water. The temperature of the column is kept higher than the average boiling point of the substance so as to attain separation of substances by the differences in the elution time.

Answer:

In a combustion reaction, a substance reacts with oxygen from the air. Combustion reactions happen at high temperatures, and transfer energy to the surroundings as light and heat. This is why you see flames when things burn. ... The products of combustion reactions are compounds of oxygen, called oxides.

Answer:

[tex]v = s \div t[/tex]

[tex]t = s \div v[/tex]

[tex]t = 300 \div 1500 = 0.2s[/tex]

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:

plants and animals

Explanation:

Answer:

water, light, wind, soil, humidity, minerals, gases

Explanation:

i just know

Answer:

to answer your question "which state of matter have most space between particles"

gas is your best answer

Explanation:

when in gas form..particles gain energy and move further apart

for solids particles are fixed (stays in one spot) and vibrates and for liquids particles gain energy but doesn't have enough space to move around freely..so gas is you best answer

Answer:

pH value of HCL = 2.69897

Explanation:

Given:

Concentration of HCL = 0.002 M

Find:

pH value of HCL

Computation:

pH value of HCL = - log(Concentration of HCL)

pH value of HCL = - log(0.002)

pH value of HCL = 2.69897

Answer:

Container 2 has the lowest average molecular speed

Container 4 has the highest average molecular speed

Explanation:

Step 1: Data given

Atomic mass of Xe = 131.29 g/mol

Container 1: Number of moles Xe = 0.115 moles; volume = 4.87 L; temperature= 446K

Container 2: Number of moles Xe = 0.599 moles; Volume = 5.78 L; temperature= 306K

Container 3: Number of moles Xe = 0.444 moles; Volume = 2.39L; Temperature = 408K

Container 4: Number of moles Xe = 0.556 moles; Volume=2.11L; Temperature =446K

Step 2: Calculate average molecular speed

Average molecular speed V = √(8RT/πM)

→With R = he gas constant expressed in units of J/mol-K

→with T = the temperature in Kelvin

→with M = the molar mass of the gas

Average molecular speed depends on T and M

Since it's all Xenon, M is the samefor the 4 containers

Container 1:

V1 = √(8*8.314*446K/π*131.29)

V1 = 8.48

has an average molecular speed between the highest and the lowest

V2= √(8*8.314*306K/π*131.29)

V2= 7.03

has the lowest average molecular speed

V3 = √(8*8.314*408K/π*131.29)

V3 = 8.11

has an average molecular speed between the highest and the lowest

V4 = √(8*8.314*446K/π*131.29)

V4 = 8.48

Since the volume is smaller than in container 1 the average molecular speed will be a higher

has the highest average molecular speed

53 mol Ag

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 3.2 × 10²⁵ atoms Ag

[Solve] moles Ag

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

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

53.1385 mol Ag ≈ 53 mol Ag

Answer:

.4 moles

Explanation:

this is if it's 35 grams

Answer:

b) carboxylic acid

Explanation: