7. A solution containing 90grams of KNO3 per 100. grams of H2O at
50.°C is considered to be
(1) dilute and unsaturated
(2) dilute and supersaturated
(3) concentrated and unsaturated
(4) concentrated and supersaturated

Answer:

109988 grams per second

Explanation:

To solve this problem first we convert 9503 metric tons into grams, keeping in mind that:

Meaning that:

Then we calculate how many seconds are there in one day:

Finally we calculate the consumption rate:

Answer:

Copper, Water, and Oxygen

Explanation:

Because they are compounds and compounds are pure substances <3

Answer: copper

Explanation: because all of the atoms that make up copper are copper i.e its not a compound or mixture. not made od molecules

Answer:

93 kPa

Explanation:

Step 1: Given data

Step 2: Calculate the final pressure of carbon dioxide gas

If we assume carbon dioxide behaves as an ideal gas, we can calculate the final pressure of carbon dioxide gas using Boyle's law.

P₁ × V₁ = P₂ × V₂

P₂ = P₁ × V₁/V₂

P₂ = 155 kPa × 3.0 L/5.0 L = 93 kPa

Answer:

37.7 atm

Explanation:

Using the relation;

(P + an^2/V^2) (V - nb) = nRT

(P + an^2/V^2) = nRT/(V - nb)

a = 0.0341 atm dm^2 Mol^2

b = 0.0237 dm/mol

P = nRT/(V - nb) - an^2/V^2

P = [4.3 * 0.082 * 325 / (3.6 - (4.3 * 0.0237))] - (0.0341 * (4.3^2))/(3.6^2)

P = 114.595/(3.498) - 0.0487

P = 37.7 atm

question 1 water question 2 instant tea question 3 mixture

Answer:

4 is the answer

Explanation:

i am not sure for this question

Answer:

No, you can not calculate the solubility of X in water at 17 0C.

Explanation:

Solubility refers to the amount of a substance that dissolves in 1000 L of water.

To calculate the solubility of a solute in water, all the water is evaporated and the solid is carefully collected, washed, dried and weighed. The mass of solid obtained can now be used to calculate the solubility of the solute in water as long as there was no loss in mass of solid during the experiment.

In this case, the student threw away part of the solid that precipitated. As a result of this, the mass of solid obtained at the end of the experiment is not exactly the total mass of solute that dissolved in the solvent. Hence, the solubility of X in water at 17 0C can not be accurately calculated.

Answer:

b

Explanation:

it could also be a, c, or d

Answer:

violet

Explanation:

just violet

oh and you spelled "COLER" wrong, its color or colour if you live somewhere else

Answer:

[tex]n=1.732mol[/tex]

[tex]\% N=18.7\%[/tex]

Explanation:

Hello!

In this case, since the molecular formula of glycine is C₂H₅NO₂, we realize that the molar mass is 75.07 g/mol; thus, the moles in 130.0 g of glycine are:

[tex]n=130.0g*\frac{1mol}{75.07 g}\\\\ n=1.732mol[/tex]

Furthermore, we can notice 75.07 grams of glycine contains 14.01 grams of nitrogen; thus, the percent nitrogen turns out:

[tex]\% N=\frac{14.01}{75.07}*100\% \\\\\% N=18.7\%[/tex]

Best regards!

Answer:

1.25M

Explanation:

The element sulfur (S) is most likely to form covalent bonds with the element oxygen. Thus, the correct option for this question is D.

Covalent bonds may be defined as a type of chemical bond that significantly involves the mutual sharing of electrons in order to form electron pairs between atoms. This pairing of electrons is simultaneously attracted by the two atomic nuclei.

Sulfur is categorized into the category of nonmetal in group 6A, and therefore it has 6 valence electrons. In order to obey the octet rule, it needs to gain 2 electrons. It can do this by forming 2 single covalent bonds.

The sulfur atom subsequently shares four valence electrons with two oxygen atoms as two covalent double bonds, and shares its remaining two electrons with two oxygen atoms, forming two covalent single bonds.

Therefore, the element sulfur (S) is most likely to form covalent bonds with the element oxygen. Thus, the correct option for this question is D.

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Answer:

BaCl₂·(H₂O)₂

Explanation:

The reaction that takes place is:

The information given by the problem tells us that 5.00 g of reactant were consumed. Of those 5.00 g, 4.26 g were converted into BaCl₂, this means that the other 0.74 g were converted into water.

We convert 0.74 g of water into moles, using its molar mass:

Then we convert 4.26 g of BaCl₂ into moles:

We can write these results as (BaCl₂)₀.₀₂·(H₂O)₀.₀₄. We multiply those coefficients by 50 in order to make them integers, and we're left with:

Answer:

3 Ni + Fe(NO₃)₃ --> 3 Ni(NO₃) + Fe

Explanation:

In this question, the reactants are;

Solid Nickel and Iron nitrate. This is represented as;

Ni and Fe(NO3)3

The equation of the reaction is given as;

3 Ni + Fe(NO₃)₃ --> 3 Ni(NO₃) + Fe

The option that closely matches this is;

Option D. (Although the reaction is not balanced)

Answer:

If all the objects are placed at the same angle.

Explanation:

If all the objects are placed at the same angle so all the light from the flashlight shine comes back to the flashlight. If the A object is placed at the specific location at which the mirror X reflects the light after hitting it, then the other E object is placed at the location where the light comes after reflecting the A object then the light comes back to the flashlight if the angle between objects placement is right.

Answer:

d

Explanation:

Answer: The molecular formula will be [tex]H_{16}NOCl[/tex]

Explanation:

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mass of H = 5.80 g

Mass of N = 20.16 g

Mass of O = 23.02 g

Mass of Cl = 51.02 g

Step 1 : convert given masses into moles.

Moles of H =[tex]\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{5.80g}{1g/mole}=5.80moles[/tex]

Moles of N =[tex]\frac{\text{ given mass of N}}{\text{ molar mass of N}}= \frac{20.16g}{14g/mole}=1.44moles[/tex]

Moles of O =[tex]\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{23.02g}{16g/mole}=1.44moles[/tex]

Moles of Cl =[tex]\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{51.02g}{35.5g/mole}=1.44moles[/tex]

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For H = [tex]\frac{5.80}{1.44}=4[/tex]

For N = [tex]\frac{1.44}{1.44}=1[/tex]

For O = [tex]\frac{1.44}{1.44}=1[/tex]

For Cl = [tex]\frac{1.44}{1.44}=1[/tex]

The ratio of H: N: O: Cl= 4: 1: 1: 1

Hence the empirical formula is [tex]H_4NOCl[/tex]

The empirical weight of [tex]H_4NOCl[/tex] = 4(1)+1(14)+ 1(16) + 1(35.5)= 69.5 g.

The molecular weight = 278 g/mole

Now we have to calculate the molecular formula.

[tex]n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{278}{69.5}=4[/tex]

The molecular formula will be=[tex]4\times H_4NOCl=H_{16}NOCl[/tex]

Explanation:

The reaction is given as;

Br2(g) + Cl2(g) ----> 2BrCl(g)

From the equation;

1 mol of Br2 reacts with 1 mol of Cl2

Converting the masses given to moles, using the formular;

Number of moles = Mass / Molar mass

Br2;

Number of moles = 33.7 g / 159.808 g/mol = 0.21088 mol

Cl2;

Number of moles = 13.0 g / 70.906 g/mol = 0.18334 mol

From the values;

0.18334 mol of Cl2 would react with 0.18334 mol of Br2 with an excess of 0.02754 mol of Br2

What is the maximum amount of bromine monochloride that can be formed? __________grams

1 mol of Cl2 produces 2 mol of Bromine Monochloride

0.18334 mol of Cl2 would produce x

Solving for x;

x = 0.18334 * 2 = 0.36668 mol

Converting to mass;

Mass = Number of moles * Molar mass = 0.36668 mol * 115.357 g/mol

Mass = 42.299 g

What is the FORMULA for the limiting reagent?

The limiting reagent is Cl2 as it determines the amount of product formed. The moment the reaction uses up Cl2, the reaction stops.

What amount of the excess reagent remains after the reaction is complete? __________grams

The excess reagent is Br2

The number of moles left is;

0.02754 mol of Br2

Converting to mass;

Mass = Number of moles * Molar mass = 0.02754 mol  * 159.808 g/mol

Mass = 4.401 g

Answer:

A log burning to ashes is a chemical change.

Explanation:

Answer:

Chemical Change

Explanation:

Burning of wood is a chemical change as new substances which cannot be changed back [e.g. carbon dioxide] are formed. For example, if wood is burned in a fireplace, there is not wood anymore but ash.

Answer:

a

Explanation:

sugar is composed of different elements combined in a manner form

Answer:

Magnesium chloride/Molar mass

95.211 g/mol

Explanation:

Answer: [tex]K_a[/tex] for the acid is [tex]3.34\times 10^{-4}[/tex]

Explanation:

[tex]HC_9H_7O_4\rightarrow H^+C_9H_7O_4^-[/tex]

 cM              0             0

[tex]c-c\alpha[/tex]        [tex]c\alpha[/tex]          [tex]c\alpha[/tex]  

Give c = 0.328 M and [tex]pH=1.987[/tex]

[tex]1.987=-log[H^+][/tex]

[tex][H^+]=0.0103[/tex]

[tex][H^+]=c\times \alpha[/tex]

[tex]0.0103=0.328\times \alpha[/tex]

[tex]\alpha=0.0314[/tex]

So dissociation constant will be:

[tex]K_a=\frac{(c\alpha)^{2}}{c-c\alpha}[/tex]

Putting in the values we get:

[tex]K_a=\frac{(0.328\times 0.0314)^2}{(0.328-0.328\times 0.0314)}[/tex]

[tex]K_a=3.34\times 10^{-4}[/tex]

Answer:

Plastic is better because it doesn't melt in the microwave but aluminum burns in the microwave

Explanation:

Answer:

I would say C) Survive

An organism will survive, move or die if there is a change to its ecosystem. Therefore, option (D) is correct.

An ecosystem contains all the organisms and the physical environment with which they interact.  The biotic and abiotic components are connected together through energy flows and nutrient cycles. Energy injects into the system through photosynthesis into plant tissue.

Animals play an important role by feeding the plants in the movement of matter and energy through the system.  Decomposers release carbon back into the atmosphere and facilitate nutrient cycling by breaking down dead organic matter.

External and internal factors control the ecosystem. External factors such as climate control the overall structure of an ecosystem but are not influenced by the ecosystem. Internal factors are controlled such as decomposition, shading, root competition, disturbance, succession, and the types of species present.

The change in the ecosystem makes the organism to adapt the environment in order to survive, move to a new place or die.

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Answer:

See explanation below

Explanation:

Let's answer this by parts.

a) As the reaction is naturally exothermic (Exerts heat), increasing temperature means that the reaction will move forward the direction where its absorbing heat

, so the equilibrium will be favored to the reactant side.

b) In this case, the addition of CO, which is a reactant will favor the reaction to the product side. This is because putting more quantity in the reactants will cause that the equilibrium constant K, increase it's innitial value, and this favors the product side.

c) In this case, it happens something similar to case b. This will cause that the reaction will have to work to cover the loss of methanol, therefore, equilibrium will move to the product side too.

d) In this case, we are adding another substance that reacts with CO, so it means that the other reactant is being removed, therefore, the reaction will work to cover this loss but also to cover the adding of the new substance, causing that the K decrease it's value, so equilibrium will be favored to the reactants side.

Hope this helps

Answer:

Na

Explanation:

Answer:

The percent dissociation would increase

Explanation:

Percent dissociation is the ratio of amount dissociated to the initial concentration.

Decreasing the concentration of the solution leads to an increase in percent dissociation.

Answer:

The answer is option D

Explanation:

This is because Mrs. Linde resolves the conflict by committing to a new life with Krogstad, which develops the theme that new beginnings are always possible.

The conflict in this passage develops a theme, as Mrs. Linde resolves the conflict by committing to a new life with Krogstad, which develops the theme that new beginnings are always possible. Option D.

A conflict is defined as a battle or disagreement. A dispute over parenting techniques is an example of conflict, the two parties not seeing eye to eye.

In conclusion, The passages conflict develops the theme that new beginnings are always possible.

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Answer:

snow is made up of a variety of mostly organic matter, including dead or dying animals and phytoplankton, protists, fecal matter, sand, and other inorganic dust.

Explanation:

I hope I helped!!

Plz mark me brainliest it would really make my day!

Answer:

I think its organic unless we are talking about this snow storm then no