Complete this example: A 0.67 molal solution was
made by dissolving glucose in water. The boiling
point of pure water is 100.00°C. The boiling point
constant for water is 0.51°C kg/mol.
on
the
Set up the problem.
• 4T2 = (0.51°C•kg/mole)(0.67 m)
of
• What is the 473 value?
vc
• What is the boiling point for the glucose
solution?
УРС

A electrons in the outermost level of each atom

[tex]pH=-\log[H^{+}]\\\\\implies [H^{+}] =10^{-pH}=10^{-2.47}=0.0034~M[/tex]

Answer:

The object is moving away from the origin.

Explanation:

Answer:

The object is moving away from the origin

The object started at 2 meters.

The object is traveling at a constant velocity.

Explanation:

The line on the graph is moving in the upward direction which means the farther right on the graph you go the farther up the line is. The line also has a constant slope which indicates that the object is moving at a constant rate. and if you look at x=0 the y=2 so therefor the object started at 2 meters.

Based on the calculations through the ICE table, the pH of the buffer solution is equal to 3.30.

Given the following data:

First of all, we would write the properly balanced chemical equation for this chemical reaction:

                                     [tex]HNO_2(aq)\rightleftharpoons H^{2+} (aq)+ KNO_2^{-}(aq)[/tex]

Initial cond.                       0.55M              0          0.75M

    [tex]\Delta C[/tex]                                   -x                   x               x

At equib.                           0.55M - x         0 + x      0.75M + x

From the ICE table, the Ka for this chemical reaction is given by:

[tex]K_{a}=\frac{[H^+][NO_2^+]}{HNO_2} \\\\H^+ = K_{a}\frac{[HNO_2]}{[NO_2^+]} \\\\H^+ = 6.8 \times 10^{-4} \times \frac{0.55}{0.75} \\\\H^+ = 6.8 \times 10^{-4} \times 0.733\\\\H^+ = 4.98 \times 10^{-4} \;M[/tex]

Now, we can calculate the pH of the buffer solution:

[tex]pH=-log[H^+]\\\\pH=-log[4.98 \times 10^{-4}]\\\\pH=-(-3.30)[/tex]

pH = 3.30.

Alternatively, you can calculate the pH of this buffer solution by applying Henderson-Hasselbalch equation:

[tex]pH =pka+ log_{10} \frac{A^-}{HA}[/tex]

Where:

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The two different mineral elements that a fertilizer can contain are:

Fertilizers are chemical substances added to the soil in order to improve crop growth and development.

Fertilizers are artificially made to contain mineral elements that are needed by the plants. Some of the mineral elements are as follows:

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Answer:

is the answer above right? im literally struggling rn

Explanation:

Answer:

.0796  mole

Explanation:

Al2 (SO3)3      add the molecular weights

2 * Al = 2 * 26.982  +  

 3 * S  = 3 * 32.06   +

   9 * O  = 6 * 15.999      = 294.135  gm   per mole

Now... you have   23.4 grams of this substance

  23.4/294.135 = .0796 mole

EDITED !

Answer:

independent- test variable

manipulated - outcome variable; if needed, there could be changes.

Explanation:

knowledge

Answer:

Hot magma change climate continents drift block sunlight folded mountains form rock deposits

Explanation:

brainliest now

ignore this, it wont let me exit this screen/ tab for some reason..

Answer:

I think 50%

Explanation:

im not really sure

Answer:

check the picture down below

Explanation:

An ionization suppressor is an alkali metal capable of preventing ionization, which can be used in atomic spectroscopy to determine matter composition.

Ionization refers to the phenomena capable of converting neutral atoms/molecules to electrically charged atoms/ions.

Ionization is a process by which radiation (e.g., alpha, beta, gamma rays) can pass energy to inert matter.

Some examples of ionization suppressors include salts of alkali metals (for example, potassium), which can be used in atomic spectroscopy to determine matter composition.

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[tex]\text{Given that,}\\ \\\text{Volume,}~V= 57 mL = 0.057 L\\\\\text{Molar concentration,}~ S = 0.17 ~mol/L\\\\\text{Number of moles,} ~ n=?\\\\S = \dfrac{n}{V} \\\\\implies n = SV = 0.17\times 0.057 =0.00969 ~mol ~ HCl[/tex]

Answer:

Metal oxides are compounds composed of metal ions and oxide ions. Nonmetal oxides are compounds composed of nonmetal atoms and oxygen atoms. The main difference between metal oxides and non metal oxides is that metal oxides are basic compounds whereas nonmetal oxides are acidic compounds.

Explanation:

have a great day ahead

tC

Answer:

Metals react with oxygen to form metallic oxide while Nonmetals react with oxygen to form non-metallic oxide. metallic oxides are basic in nature while Nonmetallic oxides are acidic in nature.


Metal oxides are compounds composed of metal ions and oxide ions. Nonmetal oxides are compounds composed of nonmetal atoms and oxygen atoms. The main difference between metal oxides and non-metal oxides is that metal oxides are basic compounds whereas nonmetal oxides are acidic compounds.

METALS:

Metals usually do not combine with hydrogen. Only a few reactive metals combine with hydrogen to form ionic metal hydrides.

--------------------------------------------------------------------

NON-METALS:
Non-metals react with hydrogen to form stable, covalent hydrides.







Explanation:

Have a great rest of your day
#TheWizzer

Answer:

As we have already discussed, reactivity of alkali metals tends to increase as you go down the group. Therefore, sodium is less reactive with water than is potassium, likewise with the alkaline metals; calcium is more reactive than magnesium

Answer:

Mobile sources

..........................

to generate steam which act on copper

Answer:

chemical electrical light heat

The order of increasing polarity of the solvents is; hexane< diethyl ether < acetone < n-propanol < methanol  < water

Chromatography literarily means "color writing". It provides a means of separating the components of a mixture based on its components.

The solvent in chromatography is the mobile phase while the adsorbent is the stationary phase. The order of increasing polarity of the solvents is; hexane< diethyl ether < acetone < n-propanol < methanol  < water

If we have a mixture of n-propanol and water, it would be good to add hexane to the mixture for the sake of the elution of non-polar solutes.

The secondary color green may be composed of more than one color while red, blue and yellow are single colors.

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Correct option is C)

C

6

H

12

O

6

6x+12−12=0

C has oxidation number = 0

Sorry if my answers wrong.

The given molecule, cis-2-pentene, is an Alkene. The correct option is D. Alkene

Alkanes, Alkenes, and Alkynes are examples of simple hydrocarbons.

The given molecule is cis-2-pentene

Since the name of the molecule ends in "ene", the molecule is an Alkene.

Hence, the given molecule, cis-2-pentene, is an Alkene. The correct option is D. Alkene

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Answer: Alkene

Explanation: just took tha test

Answer:

0.01

Explanation:

100 -80=20

200/20=10/1000=0.01kj

Between a water molecule and an anion, like Cl-, a hydrogen bon occurs between hydrogen atom of the water molecule and the anion.

Hydrogen bond is a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other. Hydrogen atom in water molecule attract anion due to presence of hydrogen bond.

So we can conclude that hydrogen bond occurs between hydrogen atom of the water molecule and the anion.

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Answer:

Explanation:88766

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Answer:

52 g/L

Explanation:

First, 400 mL / 1000 = 0.4 L

20.8 g / 0.4 L = 52 g /L

20

12 3.2

12bw

7. A certain music box ha the shape of a cube. Ea

cm long. What is the surface area of the box?

8. Find the amount of tin needed to make a milk to

cm and a height of 5cm.

9. Angelo is wrapping a present. The box he is using is

of 10 cm, a width of 7 cm and a height of 5 cm. Find

gift wrapper he needs to wrap the entire box?

10.

The side of the a cube measures 12 cm. Sc

a

Answer:

             287.30 g of FeCO₃

Solution:

The Balance Chemical Equation is as follow,

                           FeCl₂ + Na₂CO₃    →    FeCO₃ + 2 NaCl

Step 1: Calculate Mass of FeCl₂ as,

                            Molarity  =  Moles ÷ Volume

Solving for Moles,

                            Moles  =  Molarity × Volume

Putting Values,

                            Moles  =  2 mol.L⁻¹ × 1.24 L

                           Moles  =  2.48 mol

Also,

                            Moles  =  Mass ÷ M.Mass

Solving for Mass,

                            Mass  =  Moles × M.Mass

Putting Values,

                            Mass  =  2.48 mol × 126.75 g.mol⁻¹

                            Mass =  314.34 g of FeCl₂

Step 2: Calculate Mass of FeCO₃ formed as,

According to equation,

          126.75 g (1 mole) FeCl₂ produces  =  115.85 g (1 mole) FeCO₃

So,

               314.34 g of FeCl₂ will produce  =  X g of FeCO₃

Solving for X,

                     X =  (314.34 g × 115.85 g) ÷ 126.75 g

                     X =  287.30 g of FeCO₃

Weak base: [OH⁻] = √Kb.C

pKb = 4.2

[tex]\tt Kb=10^{-4.2}[/tex]

c = concentration

MM Amphetamine (C9H13N) = 135.21 g/mol

c = 215 mg/L = (0.215 g : 135,21 g/mol) / L = 0.00159 mol/L = 1.59  x 10⁻³ mol/L

[tex]\tt [OH^-]=\sqrt{10^{-4.2}\times 1.59\times 10^{-3}}=3.17\times 10^{-4}[/tex]

pOH = 4 - log 3.17

pH = 14 - (4 - log 3.17)

pH = 10 + log 3.17 = 10.50

Answer:

The correct answer would be 40 m/s

Explanation:

The reason 40 m/s is the correct answer is because m/s stands for meters per second.

Hope this helps you with what you're working on! :D

Answer:

40 m/s north

Explanation:

Velocity is a vector quantity, so it have both direction and magnitude.

The percentage by mass of each of the compounds would be 40%, 2.6%, 4%, and 20% respectively

The percentage by mass of a substance is given by:

Percent by mass = mass of substance/mass of solution x 100%.

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Answer/Explanation:

With oxygen, it is what you breathe in so obviously, it is going to move around into your body. But with carbon dioxide, it is what you breathe out. When you breathe in, your body takes in the oxygen and the releases the carbon dioxide. Carbon dioxide is what plants actually consume, while they release oxygen.

I hope this helps!

-No one