Please help me out ........

Answer:

0.287 M

Explanation:

Multiply the concentration of each solution by the volume of each (in liters) to get the moles of NaOH in that solution.

0.15 M • 5.4000 L = 0.81 mol NaOH

4.0 M • 0.2012 L = 0.80 mol NaOH

Add the mol of NaOH together to get the total --> 0.81 + 0.80 = 1.61 mol NaOH

Divide by the total volume of solution (5400.0 mL + 201.2 mL = 5,601.2 mL = 5.6012 L)

1.61 mol / 5.6012 L = 0.287 M NaOH

The mass of water present in the solution is 21.5 g.

Concentration refers to the amount of solute in a solution. There are various ways of expressing concentration such as;

We have the following information;

Percent concentration = 35.0 %

mass of solute = 40.0 g

Mass of water = ?

So;

35 = x/40 + x × 100/1

35 = 100x/40 + x

35(40 + x) = 100x

1400 + 35x = 100x

1400 = 100x - 35x

1400 = 65x

x = 1400/65

x = 21.5 g

Hence the mass of water is 21.5 g.

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Answer: Answer is A it will decrease soil erosion

Explanation:it just will trust me

Answer:

A.

Explanation:

the soil will not loosen when u till it

Answer:

Because the sun is low on the horizon, sunlight passes through more air at sunset and sunrise than during the day, when the sun is higher in the sky. More atmosphere means more molecules to scatter the violet and blue light away from your eyes.

Answer:

Mass of sodium metal is 130.87 gram

Explanation:

The complete reaction is

2 NaN3 --> 2 Na + 3 N2

We know that PV = nRT

n = [tex]\frac{PV}{RT}[/tex]

On substituting the given values, we get

[tex]n = \frac{\frac{99707}{101325}*75 }{0.082 *(273.15 +15)} \\n = 3.02[/tex]moles of N2

Sodium azide's molar mass

3.02 *(2/3) = 2.013 moles

Mass = 2.03 * 65.01 = 130.87 gram

Answer:

1.82

Explanation:

pH is given by the equation

Answer:

Yes, yield.

Explanation:

N2(g) + 3 H2(g) → 2 NH3 (g) balanced equation

First, find limiting reactant:  

Moles H2 = 1.83 g x 1 mole/2 g = 0.915 moles H2

Moles N2 = 9.84 g N2 x 1 mole/28 g = 0.351 moles N2

The mole ratio of H2: N2 is 3:1, so H2 is limiting (0.915 is less than 3 x 0.351)

Theoretical yield of NH3 = 0.915 mol H2 x 2 mol NH3/3 mol H2 = 0.61 moles NH3

Answer:  The FitnessGram PACER Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The test is used to measure a student's aerobic capacity as part of the FitnessGram assessment. Students run back and forth as many times as they can, each lap signaled by a beep sound.

Explanation:

The answer is It is NH3.....

Answer:

the answer is 18.75

Answer:

salt

Explanation:

because it has a much larger volume ratio

Answer:

22.9 Liters CO(g) needed

Explanation:

2CO(g)     +   O₂(g)    =>    2CO₂(g)

? Liters          32.65g

                 = 32.65g/32g/mol

                 =   1.02 moles O₂

Rxn ratio for CO to O₂ = 2 mole CO(g) to 1 mole O₂(g)

∴moles CO(g) needed = 2 x 1.02 moles CO(g) = 2.04 moles CO(g)

Conditions of standard equation* is STP (0°C & 1atm) => 1 mole any gas occupies 22.4 Liters.

∴Volume of CO(g) = 1.02mole x 22.4Liters/mole = 22.9 Liters CO(g) needed

___________________

*Standard Equation => molecular rxn balanced to smallest whole number ratio coefficients is assumed to be at STP conditions (0°C & 1atm).

Answer:

[tex]4118\ g[/tex]

Explanation:

[tex]We\ are\ given,\\No.\ of\ moles\ of\ Na_2SO_4\ provided=29\ moles\\Hence,\\Now,\\Lets\ calculate\ the\ Gram\ Molecular\ Mass\ of\ Na_2SO_4.\\We\ know\ that,\\Gram\ Atomic\ Mass\ of\ Sodium(Na) \approx 23\ g\\Gram\ Atomic\ Mass\ of\ Sulphur(S) \approx 32\ g\\Gram\ Atomic\ Mass\ of\ Oxygen(O) \approx 16\ g\\Hence,\\We\ observe\ that,\\One\ molecule\ of\ Na_2SO_4\ is\ made\ up\ of\ 2\ Sodium\ Atoms,\ 1\\ Sulphur\ Atom\ and\ 4\ Oxygen\ Atoms.[/tex]

[tex]Hence,\\Gram\ Molecular\ Mass\ of\ Na_2SO_4=2*(GAM\ of\ Na)+1*(GAM\ of\ S)\\+4*(GAM\ of\ O)\\=2*23+1*32+4*16\\=46+32+64\\=46+96\\=142\ g[/tex]

[tex]Hence,\\We\ also\ know\ that,\\Mass\ of\ A\ Sample=No.\ of\ moles*Gram\ Molecular\ Mass\\Hence,\\Mass\ of\ 29\ moles\ of\ Na_2SO_4=29*142=4118\ g[/tex]

Answer:

4118.2

Explanation:

Given: 29 moles of na²[tex]So^{4}[/tex]

To find: In grams.

Solution: Wrong

If 1 na²[tex]So^{4}[/tex] is 142 grams, then 29 grams will be found if a set of fraction has been set up;

Let [tex]"x"[/tex] be the variable

[tex]\frac{142}{1} = \frac{29}{x}[/tex]

Cross multiply

[tex]\frac{142}{29}[/tex] [tex]= 4.9[/tex]

Correct Solution

Multiply 29 by 142 = 4118

Answer:

Chemical symbol:

Aluminum:Al

Berylium: Be

Calcium: Ca

Flourine: F

Neon: Ne

Nitrogen: N

Silicon: Si

Silfur: S

Element name

Ar: Argon

B: Boron

Li: Lithium

Na: Sodium

Fe: Iron

Atomic number

C:6

Fe: 26

Pb: 82

O: 8

N: 7

Zn: 30

Answer:

aluminum- Al

beryllium- Be

calcium- Ca

flourine- F

neon- Ne

nitrogen- N

silicon- Si

sulfur- S

_____________________________________________________

Ar- argon

B- boron

Li- lithium

Na- sodium

Fe- iron

______________________________________________________

C- 6

Fe- 26

Pb- 82

O- 8

N- 7

Zn- 30

Explanation:

Answer:

Explanation:

what did you get?

Answer:

D

Explanation:

took the test

The statement 'increasing the temperature makes a reaction spontaneous in some situations'  indicates how temperature affects the spontaneity of a reaction.

A chemical reaction is a given process in which one or more reactants are converted into different products.

In conclusion, the statement 'increasing the temperature makes a reaction spontaneous in some situations'  indicates how temperature affects the spontaneity of a reaction.

Learn more in:

https://brainly.com/question/1156488

Answer:

organism 1

Explanation:

the arrow points away from it so that means that it is being eaten and it always starts from a producer so organism 1 is likely a producer :)  

Answer:

7.53*10²³ molecules of oxygen will you need.

Explanation:

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number applies to any substance.

You can then apply the following rule of three: if by definition of Avogadro's Number 1 mole of oxygen gas contains 6.023*10²³ molecules, 1.25 moles contains how many molecules?

[tex]amount of molecules=\frac{1.25 moles*6.023*10^{23}molecules }{1 mole}[/tex]

amount of molecules= 7.53*10²³

7.53*10²³ molecules of oxygen will you need.

Answer:

Photosynthesis

Explanation:

Photosynthesis uses energy from light to convert water and carbon dioxide molecules into glucose (sugar molecule) and oxygen. The oxygen is released, or “exhaled”, from leaves while the energy contained within glucose molecules is used throughout the plant for growth, flower formation, and fruit development.

Answer:

Causative/sensitizing factors of pancreatic injury include refluxed bile acids, alcohol, and pH. They largely mediate downstream events such as elevated intracellular Ca2+ via influx through TRPC3 channels and release from IP3 and ryanodine-sensitive Ca2+ stores.

Explanation:

Answer: chemical element

Explanation: A chemical element is a substance that contains only one type of atom, which is the smallest particle of an element.

Answer: I think it is ‘Genetically diverse’

Explanation:

Answer:

Help with what?

Explanation:

Answer:

help with whattt

Explanation:

um

Answer:

The answer was be 1-chloro-1-butyne

Explanation:

In other words the answer is option letter A

You welcome have a nice day.

The name of the given alkyne, CH₃CH₂C = C – CI is 1 chloro 1 butyne.

The correct option is A.

Alkynes are unsaturated hydrocarbons, that have carbon-carbon triple bonds.

Chlorobutyne is colorless and is liquid at room temperature and pressure.

It is polar, but still slightly soluble in water.

Thus, the correct option is A, 1 chloro 1 butyne.

Learn more about 1 chloro 1 butyne.

https://brainly.com/question/26210366

Explanation:

new Mexico and Louisiana

Answer: two two

Explanation:

Answer:

[tex]\color{Blue}\huge\boxed{Answer} [/tex]

The body regulates those levels in an example of homeostasis. When levels decrease, the parathyroid releases hormones. If calcium levels become too high, the thyroid helps out by fixing calcium in the bones and lowering blood calcium levels. The nervous system helps keep homeostasis in breathing patterns.

Answer:

Explanation

Let, Wavelength = W,

Given, frequency (f) = 50 Hz, wave velocity (V) = 342 m/s

We know, V = f × W

=> 342 = 50 × W

=> W = 342/50 metre

=> W = 6.84 metre

Answer:

Explanation:

The name is of the compound is 3,3,4,4-tetramethylhexane.