plZz help i will mark BRAINLIEST ASAP​

Answer:

Meaning, Advantages & Disadvantages of - Osmosis, Multiflash Distillatiob

Explanation:

Advantages - It assists equalising concentration of solute on two sides of membrane. Reverse Osmosis is used for efficient water softening, it is easy to maintain.

Disadvantages - It needs a lot of energy. A lot of pressure is required for deionisation. Water acidity level increases, as minerals get deionised.

Advantages - Its Cost efficient , distillation uses waste heat. It has High gain output ratio. Quality of feedwater is less significant, compared to reverse osmosis.

Disadvantages - It has high operating cost in case of waste heat unavailability. High temperature imply high corrosion & scale formation.

Answer:

trigonal planar

Explanation:

The molecule SO3 is of the type AX3. The molecule is symmetrical and non polar.

There are three regions of electron density in the molecule. This corresponds to a trigonal planar geometry. This means that the three oxygen atoms are arranged at the corners of a triangle.  The bond angle is 120 degrees.

Answer:

0.50 atm

Explanation:

Step 1: Calculate the total number of gas moles

The total number of moles is equal to the sum of the number of moles of each gas.

n = nXe+ nH₂ + nAr

n = 0.60 mol + 0.50 mol + 0.40 mol = 1.5 mol

Step 2: Calculate the mole fraction of hydrogen

The moe fraction of hydrogen is the quotient between the number of moles of hydrogen and the total number of moles.

ΧH₂ = 0.50 mol / 1.5 mol = 0.33

Step 3: Calculate the partial pressure of hydrogen

Given the total pressure (P) is 1.5 atm, we can calculate the partial pressure of hydrogen using the following expression.

pH₂ = P × ΧH₂

pH₂ = 1.5 atm × 0.33 = 0.50 atm

Answer:

all I can think of is gamma rays

Answer:

6

Explanation:

lol

Answer:

14 elements

I hope this is correct answer please follow me

Answer:

The answer will be A. 7 elements

Explanation:

I took a test and I got it right hope this helps<3 ^^

Answer:

the pressure would increase with the temperature if it gets to hot the can will explode

Answer:grass and wide open areas

Explanation: grassland- large open area of country covered with grass, especially one used for grazing.

Answer:

i needed the answer to this one too

Explanation:

Answer:

[tex]T_2=400.73K[/tex]

Explanation:

From the question we are told that:

Activation energy [tex]E_a= 51.02 kJ/mol.=>51.02*10^3J/mol[/tex]

Reaction Ratio [tex]\triangle K=4.50[/tex]

Initial Temperature [tex]T_1=365K[/tex]

Generally the equation for Final Temperature [tex]T_2[/tex] is mathematically given by

 [tex]log \triangle K=\frac{E_a}{2.303R}*(\frac{T_2-T_1}{T_1T_2})[/tex]

Where

 [tex]R=Gas constant[/tex]

 [tex]R =8.3143[/tex]

Therefore

 [tex]log 4.50=\frac{51.2*10^3}{2.303*8.31432}*(\frac{T_2-365}{365*T_2})[/tex]

 [tex]log 4.50=7.328*\frac{T_2-365}{T_2}[/tex]

 [tex]0.0892=\frac{T_2-365}{T_2}[/tex]

 [tex]0.0892T_2=T_2-365[/tex]

 [tex]365=T_2-0.0892T_2[/tex]

 [tex]365=0.91T_2[/tex]

 [tex]T_2=\frac{365}{0.91}[/tex]

 [tex]T_2=400.73K[/tex]

Answer:

A. brain

Explanation:

every instruction to us is sent by brain

Answer:

A. Brain

Explanation:

It assembles the messages in a way that has meaning for us, and can store that information in our memory.

Answer:

m = 7.29 grams

Explanation:

Given that,

Initial temperature, T₁ = 25ºC

Final temperature, T₂ = 31.5ºC

The specific heat of the metal is 0.89 J/gºC.

We know that the heat released due to the change in temperature is given by :

[tex]Q=mc\Delta T\\\\m=\dfrac{Q}{c\Delta T}\\\\m=\dfrac{42.2 }{0.89\times (31.5-25)}\\\\m=7.29\ g[/tex]

So, the mass of the piece is equal to 7.29 grams.

Answer:

18 grams

Explanation:

Because 17,190 yrs divided by the amount of years it takes for a half-life to occur is 3. So 3 half life’s happen, so you divide 144/2 once, equaling 72. You divide 72/2 again (another half-life) and you get 36. You then calculate the third half life by dividing 36/2 which equals 18 grams.

Answer:

5730

Explanation:

Answer to Founders Education:)

Answer:

[H⁺] = 3.23x10⁻³ M

Explanation:

For a weak monoprotic acid, such as acrylic acid, we can calculate [H⁺] using the following formula if the solution concentration is significantly higher than the Ka:

Where C is the weak acid concentration.

We input the data:

And solve for [H⁺]:

Solution :

1. Ionic equation when  [tex]$Li_3PO_4$[/tex]  and [tex]$AgNO_3$[/tex] are mixed.

  [tex]$3 Li^+ (aq) + PO_4^{3-} (aq) + 3Ag^+ (aq) + 3NO_3^-(aq) \rightarrow Ag_3PO_4(s)+3Li^+(aq)+3NO_3^-(aq)$[/tex]

Net ionic :  [tex]$PO_4^{3-}(aq)+3 ag^+(aq) \rightarrow Ag_3PO_4(s) $[/tex]

2. [tex]$K_2SO_4$[/tex] and [tex]$Na_2CO_3$[/tex]

  No reaction

3. [tex]$K_2SO_4$[/tex] and [tex]$Na_2CO_3$[/tex]

  No reaction

4. [tex]$Fe(NO_3)_2 \text{ and}\ \ Na_2CO_3$[/tex]

   [tex]$Fe^{2+}(aq)+2NO_3^-(aq)+2Na^+(aq)+CO_3^{2-}(aq) \rightarrow FeCO_3(s) + 2Na^+(aq) + 2NO_3^-(aq)[/tex]5. [tex]$Fe(NO_3)_2 \text{ and}\ \ Na_2CO_3$[/tex]

 [tex]$Fe^{2+}(aq)+2NO_3^-(aq)+2Na^+(aq)+CO_3^{2-}(aq) \rightarrow FeCO_3(s) + 2Na^+(aq) + 2NO_3^-(aq)[/tex]6. [tex]$BaCl_2 \text{ and}\ \ KOH$[/tex]

[tex]$Ba^{+2}(aq)+2Cl^-(aq)+2K^+(aq)+2OH^-(aq) \rightarrow Ba(OH)_2(s) + 2K^+(aq) + 2Cl^-(aq)$[/tex]

7. [tex]$BaCl_2 \text{ and}\ \ KOH$[/tex]

[tex]$Ba^{+2}(aq)+2Cl^-(aq)+2K^+(aq)+2OH^-(aq) \rightarrow Ba(OH)_2(s) + 2K^+(aq) + 2Cl^-(aq)$[/tex]

Answer:

Four quantum numbers of unpaired electron of chlorine are n=3,l=1,m=0,s=+1/2.

Explanation:

Answer:

Explanation:

The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the eight planets, with the remainder being smaller objects, the dwarf planets and small Solar System bodies

Answer:

[tex]Every science experiment should follow the basic principles of proper investigation so that the results presented at the end are seen as credible.}}}

Observation and Hypothesis. ...

Prediction and Modeling. ...

Testing and Error Estimation. ...

Result Gathering and Presentation. ...

Conclusions. ...

Law Formation.

Hope it help

Answer:

It is replicable.

Explanation:

An opinion is just that. Subjective is again an opinion based on the circumstances. Biased is once again a person's opinion and how they believe.

Science is meant to be replicable. Meaning you should be able to achieve the same results based on completing the experiment the exact same way.

Answer:

8.10g of sodium succinate must be added and 247mL of 0.1M HCl adding enough water until make 500mL

Explanation:

Succinic acid has a pKa₂ of 5.63

To solve this question we must find the amount of sodium succinate and 0.1M HCl that we have to add using H-H equation:

pH = pKa + log [A-] / [HA]

5.64 = 5.63 + log [Na₂Succ.] / [HSucc⁺]

0.01 = log [Na₂Succ.] / [HSucc⁺]

1.0233 = [Na₂Succ.] / [HSucc⁺] (1)

As:

0.1M = [Na₂Succ.] + [HSucc⁺] (2)

Replacing (2) in (1):

1.0233 = 0.1M - [HSucc⁺] / [HSucc⁺]

1.0233[HSucc⁺] = 0.1M - [HSucc⁺]

2.033[HSucc⁺] = 0.1M

[HSucc⁺] = 0.0494M

[Na₂Succ] = 0.0506M

Both [Na₂Succ⁺] and [HSucc⁺] ions comes from the same sodium succinate we have to find the moles of sodium succinate in 500mL of 0.1M. Then, based on the reaction:

Na₂Succ + HCl → HSucc⁺ + Cl⁻

The moles of HCl added = Moles HSucc⁺ we need:

Moles Na₂Succ:

0.500L * (0.1mol/L) = 0.0500 moles

Mass -Molar mass sodium succinate: 162.05g/mol-:

0.0500mol * (162.05g/mol) = 8.10g of sodium succinate must be added

Moles HCl:

0.0494M * 0.500L = 0.0247 moles HCl * (1L / 0.1mol) = 0.247L =

And 247mL of 0.1M HCl adding enough water until make 500mL

Answer:

B. The mass is greater after the reaction because the number of

atoms increases.

Answer:

a. True

Explanation:

Take for example the electron configuration of nitrogen:

N ⇒ 1s² 2s² 2p³

The numbers in superscript tell us the number of electrons in each orbital. This is true for all elements. In this case we can see that nitrogen has 2 electrons in the 1s orbital, 2 other in the 2s orbital, as well as 3 electrons in the 2p orbitals.

V = 3.9 L

Explanation:

Given:

T = 23°C + 273 = 296K

n = 0.16 mol He

P = 101 kPa = 0.997 atm

R = universal gas constant = 0.08205 L-atm/mol-K

V = ?

Using the ideal gas law,

PV = nRT

V = nRT/P

= (0.16 mil He)(0.08205 L-atm/mol-K)(296K)/(0.997 atm)

= 3.9 L

Answer: NaHCO3 = Na2CO3 + H2O + CO2

Answer:

Electrons in sigma bonds remain localized between two atoms. Sigma bond results from the formation of a molecular orbital by the end to end overlap of atomic orbitals. Electrons in pi bonds can become delocalized between more than two atoms. Pi bonds result from the formation of molecular orbital by side to side overlap of atomic orbitals.

Answer:

78.07

Explanation:

them seperatly is

Calcium Ca 51.333%

Fluorine F 48.667%

Answer:

beans

Explanation:

Solution :

It is given that a now-a-days many of the health clubs and the gyms provides steam saunas with the help of heated rocks in a container. When water is poured in to these heated rocks, steam is being produce.

This is because the energy conversion takes place in this process. The hot rocks have high temperatures and possess heat energy in them. So when cold water is poured in to the rocks, the cold water absorbs the heat energy from the rocks and is converted in to hot vapor by converting heat energy in to vapor energy or steam energy by the process of vaporization.