"You learned about mixtures, especially solutions and the factors that affect their makeup and properties. Why is it important to know the properties of both solutes and solvents when preparing a solution that is expected to meet a certain need?
Does this involve a chemical change or a physical change? Explain."

Can u pls help me

Answer:

0.00001= 1 x 10^-5. Since HCl is an acid, 1 x10^-5 is the H+ concentration. Write only the number of the exponent. Therefore, pH = 5.

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question we have

[tex]density = \frac{31.6}{9.5} \\ = 3.326315...[/tex]

We have the final answer as

Hope this helps you

Answer:

HERE

Explanation:Therefore, there will be

6.022

×

10

23

oxygen atoms in

1

mole, or

18 g

of water.

Answer:

I say 20 is ur best option

Our Sun will eventually turn into a red giant in the cooler temperature and high luminosity and in the white dwarf phase has a hot temperature & dim luminosity.

In astronomy, the Hertzsprung-Russell diagram, often known as the H-R diagram, is a graph that plots the absolute magnitudes (intrinsic brightness) of stars against their spectral classifications (temperatures).

From the given diagram it is clear that when sun turns into a red giant then the temperature decreases and luminosity increases as it becomes large in size. And when it finally become a white dwarf then temperature comparatively increases and luminosity gets dim due to smaller size.

Hence in the red giant phase sun has a cooler temperature and high luminosity and in the white dwarf phase has a hot temperature & dim luminosity.

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Answer:

The scale reads the tension in the string. The tension in the string is 100 N. This is the force the string must exert up on either of the 100-N weights at either end of the string.

Nothing is moving, nothing is accelerating, so the net force on the spring is zero. Likewise, the net force on either of the 100-N weights is also zero. But that is another question. The spring scale does not measure the net force. The spring scale simply measures the tension, the magnitude of the force exerted by the string.

Explanation:

Answer:

energy held by by an object becuase of its position relative to other objects

Explanation:

Answer:

The energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge , other factors.

Explanation:

I looked it up because i wanted to be sweet and help ((:

CH4 + 2O2 =》CO2 + 2H2O

Answer:

the balanced chemical reaction is provided above .

Explanation:

the given reaction is reaction of methane with oxygen ( or burning of methane in presence of oxygen )

it is highly exothermic, because high amount of heat is evolved in this reaction

Answer:

The earth

Since it is shown in the chart that, Earth is inner corner is the smallest.

Answer: wind

Explanation:

Answer:

Molecular formula = C₄H₁₂O₂

Explanation:

Given data:

Percentage of hydrogen = 13.80%

Percentage of carbon = 51.02%

Percentage of oxygen = 35.18%

Molecular formula = ?

Solution:

Number of gram atoms of H = 13.80 / 1.01 = 13.6

Number of gram atoms of O = 35.18 / 16 = 2.2

Number of gram atoms of C = 51.02 / 12 = 4.25

Atomic ratio:

            C                      :      H             :         O

           4.25/2.2           :     13.6/2.2     :       2.2/2.2

            2                      :        6          :        1

C : H : O = 2 : 6 : 1

Empirical formula is C₂H₆O.

Molecular formula:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

Empirical formula mass = C₂H₆O = 46 g/mol

n = 88 / 46

n = 2

Molecular formula = n (empirical formula)

Molecular formula = 2 (C₂H₆O)

Molecular formula = C₄H₁₂O₂

Explanation:

magnesium  +  zinc oxide  --> magnesium oxide  +  zinc

Mg + ZnO --> MgO + Zn

Reactants:

- Magnesium

- Zinc Oxide

Products:

- Magnesium oxide

- Zinc

Type of reaction: Displacement Reaction

The provided word equation depicts a chemical reaction between magnesium and zinc oxide that results in the creation of magnesium oxide and zinc.

Magnesium and zinc oxide are the reactants in the process. These are the substances that alter chemically. The process produces magnesium oxide and zinc. These are the new chemicals produced by the chemical process. This reaction undergoes a chemical transformation, as indicated by the term equation. Magnesium oxide and zinc are formed when magnesium interacts with zinc oxide.

The reaction's stoichiometry is not explicitly stated in the word equation. We cannot establish the exact quantities of the reactants and products involved without further information or factors. The term equation denotes that the reaction obeys the rule of mass conservation. The total mass of reactants must equal the total mass of products.

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Answer:

cold butter melted when heated, lighting a match, baking cookies,

Explanation:

Answer:

The magnetic field line data refutes the claim that the magnets were misaligned in the Tuesday launch.

Explanation: The data shows that there was no difference in the pattern of the field lines for all three launches. If the magnets in Tuesday's test had been misaligned, the force between the magnets in that test would be different than in the other test, showing both attraction and repulsion. During a misalignment at least one field line would connect opposite poles of the other magnets, but the magnetic field lines data we received did not show proof of misalignment.  Therefore the magnets were correctly aligned on Tuesday.

Answer:

3: 1 CH4+ 2 O2-> 1 CO2 + 2 H2O

4: 2 K+ 2 H2O -> 2 KOH+ 1 H2

Explanation:

Answer: not to be rude but who is Miley partridge? If she is a friend then u r a kind hearted person

Explanation:

Answer:

[tex]T_1 = -57.15^{\circ}C[/tex]

Explanation:

Given

[tex]P_1 = 650mmHg[/tex] --- Initial Pressure

[tex]V_1 = 5.0L[/tex] --- Initial Volume

[tex]V_2 = 5.7L[/tex] --- Final Volume

[tex]P_2 = 800mmHg[/tex] --- Final Pressure

[tex]T_2 = 30C[/tex] ---- Final Temperature

Required

Determine the initial temperature (T1)

This question will be solved using combined gas law which states:

[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]

However, the final temperature must be converted to degree kelvin

[tex]T_2 = 30C[/tex] --- Add 273.15

[tex]T_2 = 30k + 273.15 k[/tex]

[tex]T_2 = 303.15k[/tex]

Make T1 the subject in [tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]

[tex]T_1 = \frac{P_1V_1T_2}{P_2V_2}[/tex]

Substitute values for P1, V1, T2, P2 and V2

[tex]T_1 = \frac{650 * 5.0 * 303.15}{800 * 5.7}[/tex]

[tex]T_1 = \frac{985237.5}{4560}[/tex]

[tex]T_1 = 216.060855263[/tex]

Approximate

[tex]T_1 = 216k[/tex]

Convert to degree Celsius

[tex]T_1 = 216k[/tex] --- Subtract 273.15

[tex]T_1 = 216 - 273.15[/tex]

[tex]T_1 = -57.15^{\circ}C[/tex]

Hence, the initial temperature is -57.15C

God is GOOD AND arr you sure that is written properly

Answer:

Advantage and disadvantage of asexual reproduction in plant is described below in details.

Explanation:

An advantage of asexual reproduction is that the resulting plant will approach adulthood quicker. Since the new plant is emerging from a grown-up plant or plant components, it will also be stronger than a seed. Asexual reproduction can take a spot by natural or manufactured (assisted by humans) means.

The significant disadvantages of asexual reproduction are the Shortage of diversity. Following the seeds are genetically the same as the parent they are more sensitive to the same diseases and nutrient insufficiencies as the parent. All the negative deviations endure for generations.

Answer:

well the answer is 99.2lbs I know that

Answer:

K I will attempt

Explanation:

a)

[tex]O_2_{(g)}+ 2H_2_{(g)} => 2H_2O_{(l)}\\[/tex]

b)

1 : 2 : 2 (I don't know if this is what the question wants but it is what I would answer)

c)

Hydrogen because it requires 2 moles of H2 to react with 1 mole of O2

d)

24 moles of water. Look at stoichiometric coefficient. 2:2 means 24 moles you get 24 moles

e)

Oxygen. 2 < 5/2. Remember, 1 mole of O2 requires 2 moles of H2. But 5/2 is still greater than 2

f)

First, let's find out how many moles of water we can get. Since O2 is the limiting reactant, and O2:H2O ratio is 1:2, we will get 4 moles of H2O. Then, we can multiply 4 by Avogadro's number which is [tex]6.022*10^{23}[/tex] to get the number of molecules. We get: 2.41 * 10^24 molecules of water.

Answer:

I'ma just take the point thank you very much

Answer:

uh yeah I think so technically

Answer:

no

Explanation:

Answer: energy is transferred, but it can go to the products or the reactants.

Explanation: in a chemical reaction, the atoms and molecules that interact with each other are called reactants.

Answer:

I think Ne electron configuration

Answer:

D 2-7-2

Explanation:

I got it wrong and then they showed me the right answer

Answer:

V₂ = 0.958 atm

Explanation:

Given data:

Initial volume = 2300 mL (2300/1000 = 2.3 L)

Initial pressure = 1.88 atm

Final volume = (2.21 L + 2.3L) = 4.51 L

Final pressure = ?

Solution;

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

1.88 atm × 2.3 L =  P₂ × 4.51 L

V₂ = 1.88 atm × 2.3 L / 4.51 L

V₂ = 4.32 atm.L /  4.51 L

V₂ = 0.958 atm

Answer: D

Explanation:

Answer:

ok:

Explanation:

We have:

[tex]q = mc\Delta T[/tex]

we know that q = -5000 J (it is negative since you release energy)

m = 320 g

and c = 376 J/kg.

We need to be careful before plugging them in. Since the units are J/kg for c, but we are talking about grams for m, we need to convert. I will just divide c by 1000  to get c = 0.376 J/g

We can now plug in:

(-5000 J) = (320 g) * (0.376 J/g) * [tex]\Delta T[/tex]

We can solve that [tex]\Delta T[/tex] = -41.5555

So the final temperature is [tex]T - \Delta T[/tex] which equals around 8.4°C.