Triangle W Z Y is cut by bisector Z X. The lengths of sides Z W and Z Y are congruent. ZX bisects ∠WZY. If the measure of ∠YXZ is (6m – 12)°, what is the value of m?

Answer:

0.25moles

Explanation:

There are 1000[tex]cm^{3}[/tex] for 1[tex]dm^{3}[/tex]

Therefore in 1000[tex]cm^{3}[/tex] of 0.5 mol/[tex]dm^{3}[/tex] solution has = 0.5 moles

Therefore 500[tex]cm^{3}[/tex] contains = 0.5/1000 x 500 = 0.25moles

The number of moles of sulfuric acid in 0.5 mol/dm³ solution is equal to 0.25 mol.

The concentration of the solution can be determined as the number of moles of a solute in per unit volume of a solution is known as molarity or molar concentration.

The Molarity of the solution is calculated in the following formula:

Molarity (M) = Moles (n)/Volume of the Solution (in L)

Now if we have to find the number of moles of solute in the solution, the formula becomes:

Number of moles of solute (n) = Molarity (M) × Volume of the Solution

Given, the concentration of the sulfuric acid solution = 0.5 mol/dm³

The volume of the solution, V = 500 cm³

As we know, 1 dm³ = 10³ cm³, the volume of solution = 0.5 dm³

The number of moles of the sulfuric acid = M × V

= 0.5 × 0.5 = 0.25 mol

Therefore, 0.25 moles of sulfuric acid in 500cm3 of a 0.5mol/dm³ solution of sulfuric acid.

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Answer:

Explanation:

B.) Saturated

A saturated solution is when the maximum amount of solute that could be dissolved in that solvent volume at that temperature and pressure has been dissolved, adding more solute beyond this point would lead to the additional solute not dissolving in the solvent. When the maximum solute concentration in the solution that can be dissolved has been reached the solution is said to be saturated.

Hope This Helps??

Answer:

[tex]C_{9.042}H_{17.958}[/tex]

Explanation:

(This exercise has been written in Spanish and for that reason explanation will be held in such language)

Por la definición del Número de Avogadro, un mol del compuesto contiene [tex]6.022 \times 10^{23}[/tex] moléculas. La masa de un mol se determina mediante regla de tres simple:

[tex]x = \frac{6.022\times 10^{23}\,molecules}{1\,molecule} \times (2.1\times 10^{-22}\,g)[/tex]

[tex]x = 126.462\,g[/tex]

Las participaciones másicas del carbono y el hidrógeno son, respectivamente:

[tex]m_{C} = 0.858\cdot (126.462\,g)[/tex]

[tex]m_{C} = 108.504\,g[/tex]

[tex]m_{H} = 126.462\,g - 108.504\,g[/tex]

[tex]m_{H} = 17.958\,g[/tex]

Ahora, el número de moles de cada elemento es calculado a continuación:

[tex]n_{C} = \frac{108.504\,g}{12\,\frac{g}{mol} }[/tex]

[tex]n_{C} = 9.042\,mol[/tex]

[tex]n_{H} = \frac{17.958\,g}{1\,\frac{g}{mol} }[/tex]

[tex]n_{H} = 17.958\,mol[/tex]

La fórmula molecular del hidrocarburo es:

[tex]C_{9.042}H_{17.958}[/tex]

Answer:

yh you are correct. the pattern is correct! :)

Answer:

Yep! :)

Explanation:

Dry ice is colder, heavier, less messy than regular ice. If I understood your question correctly, the mass of it would decrease bc it is being dispersed into the air as carbon dioxide.

Explanation:

As a result of the transformation of solid carbon dioxide into carbon dioxide gas, which enters the atmosphere, the weight of the ice decreases and falls.

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Answer:

c

Explanation:

Soil, Plants get energy from the sun.. Answer is C.

Answer:

B. trees

Explanation:

A biotic factor is something in an environment or ecosystem that is living. For example, plants and animals are biotic factors. An abiotic factor is just the opposite-they are not living. Rocks and water are examples of abiotic factors.

Soil composition, temperature and sunlight are all not alive. Therefore, they must be abiotic factors.

Trees are living organism. This means that they are biotic factors. So, the correct answer is B: trees.

Answer:

D

Explanation:

Scientists always perform tests and observe and measure in the physical world to prove their points or answer their questions.

Answer:

E

Explanation:

A combination reaction is one in which two elements or two compounds react to give a new single compound

Hence, what we are expecting on the reactant side is only a single product and not a mixture of products

For the first reaction, we had two elements giving a single product

For the second reaction, we had same

For the third, we had same

For the fourth, we had two compounds reacting to give a singe new product

While in the last, we had two different products which means it does not follow the definition of a combination reaction and that makes it our answer

Answer:

Change of color, change in temperature, change of  energy or loss heat, odor etc....

Answer:

c

Explanation:

the mitochodria is the protien power house of the cell

Answer:

calculate grams and use mole ratio lol

Explanation:

Answer:

Explanation:

23

Answer:

Purple flowers are dominant

Explanation:

Answer:

So, the atomicity of noble gases is 1. Example. ... So, the atomicity of hydrogen, nitrogen, oxygen, chlorine, bromine and iodine is 2 each.

Explanation:

So, the atomicity of noble gases is 1. Example. ... So, the atomicity of hydrogen, nitrogen, oxygen, chlorine, bromine and iodine is 2 each.

could  help

Answer:

Volcanic eruptions.

Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the way the particles inside them differ.

In a gas, the molecules are spread wide apart and moves freely at high speeds

In a liquid, the more closer to each other and will vibrate or slip past each other

In a solid, the molecules are tightly packed, making no room for each other and harder to move. These molecules vibrate and jiggle but, don't move

Answer:

electrolysis is a technique that uses a direct electric current to drive an otherwise non-spontaneous chemical reaction

Explanation:

Answer:

Molarity and molality are both used to express the concentration of a solution. The amount of solute is both expressed in moles.

Explanation:

Answer:

Number of energy levels that the element has.

Explanation:

The period number (n) is the outer energy level that is occupied by electrons. The period number that an element is in, is the number of energy levels that the element has.

Answer:

18 DAYS IS THE HALF LIFE OF THE RADIOISOTOPE.

Explanation:

Using the formula

Nt = No * (1/2)^t/t1/2

where;

Nt = amount remaining = 25 g

No = Initial amounrt of the radioisotope = 50 g

t = time elapsed = 18 days

t1/2 = half life = unknown

Substitute the values into the equation and obtain the half life of the radioisotope;

Nt = No * (1/2) ^t/t1/2

25 = 50 * (1/2) ^18/t1/2

25 /50 =  (1/2)^18/ t1/2

1/2 = (1/2)^18/t1/2

1/2)^1 = (1/2)^18/t1/2

1 = 18/t1/2

t1/2 = 18 days.

So therefore the half life of the radioisotope is 18 days.

Answer:

18 days

Explanation:

Did it on A pex

Answer:

a

Explanation:

The overall equation is [tex]C_2H_4 + H_2 ---- > C_2H_6[/tex].

A chemical equation is defined as a symbolic representation of a chemical reaction in the form of symbols and formulas, in which reactant elements are given on the left and product units on the right.

For example,

[tex]NaOH+ HCl ---- > NaCl+ H_2O[/tex]

In this, reactants are converted to products which is symbolized by a chemical equation. For example, iron (Fe) and sulfur (S) combine to form iron sulfide (FeS).

Fe(s) + S(s) → FeS(s)

here, the plus sign indicates that iron reacts with sulfur.

Thus, the overall equation is [tex]C_2H_4 + H_2 ---- > C_2H_6[/tex].

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Answer:

1st answer choice

P4O6 + 2 O2 -> P4O10

Explanation:

You need to cancel out reactants and products that are the same.

P4 cancels out because it appears in both reactants and products

We get 2 O2 in the reactants because 5-3= 2

Thus, answer choice 1 is correct.

Answer:

please give more clarification

Answer:

Solute

Explanation:

Answer:

Strong Nuclear Force

Explanation:

Strong Nuclear Force; is the force that keeps the nucleons bound inside the nucleus of an atom. It is a short range attractive force that acts between all nucleons in the nucleus of the atom that is much stronger than electrical forces. 

Answer:

nuclear force

Explanation:

-Pure magnesium is commonly made by separating it from seawater. This process is known as electrolysis. The liquid magnesium formed is cooled into convenient blocks of metal known as ingots. The chlorine gas is recycled to form hydrochloric acid for the production of more magnesium chloride.

Answer:

2,2- dichloro-heptane

Explanation:

The IUPAC name of the compound is 2,2-dichloro-heptane

Answer:

The percentage yields are as follows :

a) 64.28%

b) 58.03%

c) 69.46%

d) 79.31%

Explanation:

The percentage yield is the ratio of the actual yield of a product to the expected or theoretical yield expressed as a percentage.

Percent yield = actual yield/theoretical yield x 100%

a) from the question, expected yield is 68.3 g whilst the actual yield is 43.9 g

therefore,

Percentage yield = 43.9 g/68.3 g x 100%

                             =  0.64275 x 100%

                             =  64.28%

b) From the question, expected yield is 0.0722 mol while the actual yield is 0.0419 mol. Therefore

Percentage yield = 0.0419 /0.0722 x 100%

                             = 0.58033 x 100%

                             = 58.03%

c) A limiting reactant is the reactant is is completely used in a recation to form a product. That is, it is the reactant that is not in excess.

From the equation of the reaction :

CH3COOH + CH3CH2OH --> CH3COOCH2CH3 + H2O

1 mole of ethanol reacts with 1 mole of acetic acid to give 1 mole of ethyl acetate.

From the question, ethanol is the limiting reactant because it is not in excess. Hence,

4.29 mole of ethanol should produce 4.29 mole of ethyl acetate (expected yield).

However only 2.98 mol of ethyl acetate is produced (actual yield)

Percentage yield = 2.98mol/4.29 mol x 100%

                            =  0.69463 x 100%

                            = 69.46%

d) From the question, acetic acid is in excess hence ethanol is the limiting reactant

therefore from the equation of the reaction:

1 mole of ethanol reacts with 1 mole of acetic acid to give 1 mole of ethyl acetate.

0,58 mol of ethanol should produce 0.58 mol of ethyl acetate (expected yield)

But 0.46 mol of ethyl acetae was produced (actual yield)

Percentage yield = 0.46mol /0.58 mol x 100%

                             = 0.79310 x 100%

                              = 79.31%

Answer:

D. Thermal conduction is blocked by the flip-flops.

Explanation:

Convection is a process of heat transfer which involves fluids( liquid or gas). This however rules convection out of the answer.

Radiation involves heat transfer from the sun to bodies on earth.

Conduction involves heat transfer between two solid bodies. Hot beach sand and flip-flops are solid bodies which validates thermal(heat) conduction.