Identify the one thing that you were most surprised by in the quiz. Explain
why.

Answer:

The alkyne is linear

Explanation:

Any molecule with a triple bond is considered an alkyne. In regards to the shape, because carbon can only bond to 4 different atoms at once a triple bond fills in 3 of the required 4 atoms needed to reach the molecules ground state (when it's most stable). The more electrons shared between atoms, the shorter the bond will be which results in a stronger and more linear line. Keep in mind a quadruple bond is not possible between carbons as of now.

Answer:

di ko po Alam sorry

Explanation:

sorry sorry sorry sorry sorry

Answer: you dont drink water for years

Explanation: dont drink water for years on end

neutrons=117

protons=78

Answer:

Platinum has mass number 195.

The atomic number of platinum =78

so the number of protons is 78.

By using simple formulas

we can find out that how many neutrons and protons are present in an atom of platinum-195.

Mass number = neutrons + protons

195=neutrons + 78

neutrons=195-78=117

so the number of neutrons is 117.

Answer:837.9

Explanation:add those 2 numbers

Answer:

Emission of Light

Explanation:

Chemiluminescence is the emission of light as the result of a chemical reaction, and not a property of a specific compound.

Dont know if you were asking for this but hope it helps

Aldehydes and Ketones. Aldehydes and ketones are classes of organic compounds that contain a carbonyl (C=O) group.

that's the correct answer

can I get brainilest

Considering the definition of pOH and strong base, the pOH of the aqueous solution is 1.14

The pOH (or potential OH) is a measure of the basicity or alkalinity of a solution and indicates the concentration of ion hydroxide (OH-).

pOH is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:

pOH= - log [OH⁻]

On the other hand, a strong base is that base that in an aqueous solution completely dissociates between the cation and OH-.

LiOH is a strong base, so the concentration of the hydroxide will be equal to the concentration of OH-. This is:

[LiOH]= [OH-]= 0.073 M

Replacing in the definition of pOH:

pOH= -log (0.073 M)

pOH= 1.14

In summary, the pOH of the aqueous solution is 1.14

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The equilibrium constant shows the extent of dissolution of a substance in solution. The molar solubility of the compound here is 1.2 * 10^-8 M.

The solubility product is the equilibrium constant that shows the extent to which a substnace is dissolved in soution.

Now let us set up the ICE table as shown;

               Cr(OH)3 (s) <-> Cr^3+ (aq) + 3OH^- (aq)

I                                           0                 0

C                                          +x               +3x

E                                          x                   3x

Ksp = [Cr^3+] [OH^- ]^3

6.3x10^-31 = [x] [3x]^3

6.3x10^-31 = 27x^4

x = 4√6.3x10^-31 /27

x = 1.2 * 10^-8 M

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If the concentration of acetyl chloride  is increased ten times the rate of reaction is increased ten times.

The conversion of acetyl chloride to methyl acetate is a substitution reaction. Recall that a substitution reaction is one in which a moiety in a molecule is replaced by another.

In this reaction, the CH3O- ion replaces the chloride ion. In the first step, the CH3O- ion attacks the substrate in a slow step. This creates a tetrahedral intermediate. Loss of the chloride ion yields the  methyl acetate product.

The rate determining step is the formation of the tetrahedral intermediate. Since the reaction is first order in the acetyl chloride, if its concentration is increased ten times the rate of reaction is increased ten times.

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Answer: Does not change.

Explanation:

The atomic number and the electrical charge of that atom would remain unchanged. Neutrons do not carry an electrical charge so adding or removing them from the nucleus does not change the electrical charge of the nucleus.

The characteristic of reactions that depends on valence electrons is the bond type.

In chemistry, a chemical bond could be;

The type of bond formed depends on the number of valence electrons present. When there are few valence electrons on an atom, it mostly forms ionic bonds.

When there are more electrons on an atoms, it mostly forms covalent bonds and the electrons between the atoms are shared.

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Answer:

D: bond number

Answer:

sugar

Explanation:

sand will not dissolve in water because the bond in water isn't strong enough to dissolve it.

so sand is a big no.

so the answer is the other option: which is sugar.

Answer:

The process in which plants release water through their leaves back into the air

Explanation

Answer:

The process in which plants release water through their leaves back into the air.

Hope this helps!

I'm not able to understand that what is written in the pic.. As I can't understand this language..

Treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Chemotherapy may be given by mouth, injection, or infusion, or on the skin, depending on the type and stage of the cancer being treated.

Answer:

1. 7.81 moles HgO

2. n = mass/molar mass = (4000 g)/(159.69 g/mol) = 25.05 mol.

Explanation:

How many moles of mercury (II) oxide are needed to produce 125 g of oxygen?

2HgO ==> 2Hg + O2  

125 g O2 x 1 mol O2/32 g x 2 mol HgO / mol O2 = 7.81 moles HgO

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If 4000 g of Fe2O3 is available to react, how many moles of CO are needed?

The no. of moles of CO are needed = 75.15 mol.

Fe₂O₃ + 3CO → 2Fe + 3CO₂,

It is clear that 1 mol of Fe₂O₃ reacts with 3 mol of CO to produce 2 mol of Fe and 3 mol of CO₂.

If 4.00 kg Fe₂O₃ are available to react, how many moles of CO are needed?

We need to calculate the no. of moles of 4.00 kg Fe₂O₃:

n = mass/molar mass = (4000 g)/(159.69 g/mol) = 25.05 mol.

Using cross multiplication:

1 mol of Fe₂O₃ need  → 3 mol of CO to react completely, from stichiometry.

25.05 mol of Fe₂O₃ need  → ??? mol of CO to react completely.

The no. of moles of CO are needed = (3 mol)(25.05 mol)/(1 mol) = 75.15 mol.

Answer

The most abundant carbon isotope is carbon-12

Explanation:

The relative atomic mass of carbon is 12.011, which is extremely close to 12.0. This means that the masses C-13, and C-14 are practically negligible when contributing to the relative atomic mass of carbon.

In fact, the C-12 isotope makes up 98.9% of carbon atoms, C-13 makes up 1.1% of carbon atoms, and C-14 makes up just a trace of carbon atoms as they are found in nature.

The number of atoms in 1.28 grams of vanadium is 1.51×10²² atoms

From Avogadro's hypothesis,

1 mole of Vanadium = 6.02×10²³ atoms

But

1 mole of Vanadium = 51 g

Thus,

51 g of Vanadium = 6.02×10²³ atoms

51 g of Vanadium = 6.02×10²³ atoms

Therefore,

1.28 g of Vanadium = (1.28 × 6.02×10²³) / 51

1.28 g of Vanadium = 1.51×10²² atoms

Thus, 1.51×10²² atoms is present in 1.28 g of Vanadium

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Hydrochloric acid can cause damage if it comes into contact with your lungs, eyes, stomach, or skin. If hydrochloric acid comes into contact with your skin, it can cause: chemical burns. scarring.

Answer:

Learning Task 3. Solving word problems involving multiplication of deci-

the

A cstep in solving word problems. Do these in your notebook. ),

1. A clerk is paid P 45.25 per hour for 40 hours a week, 1.50 times the

regular rate for overtime and double the rate for a holiday. How much

holiday?

2. fofkmputer programmer earns a regular hourly rate of P50.00. If he

worked 42.75 hours in a week, how much did he earn?

3. Arthur earns P1350.00 a day. He sets aside 0.10 of this for savings.

How much does he save in a month?

4. Mr. Fernandez has a monthly pay of P 5,450. The tax deducted from

year?

5. Dianne works 2.5 hours a day from Monday to Friday and 3.75 hours

his a

on Saturday. If he is paid P25.00 per hour, how much does he earn in

a

week?

Explanation:

Learning Task 3. Solving word problems involving multiplication of deci-

the

A cstep in solving word problems. Do these in your notebook. ),

1. A clerk is paid P 45.25 per hour for 40 hours a week, 1.50 times the

regular rate for overtime and double the rate for a holiday. How much

holiday?

2. fofkmputer programmer earns a regular hourly rate of P50.00. If he

worked 42.75 hours in a week, how much did he earn?

3. Arthur earns P1350.00 a day. He sets aside 0.10 of this for savings.

How much does he save in a month?

4. Mr. Fernandez has a monthly pay of P 5,450. The tax deducted from

year?

5. Dianne works 2.5 hours a day from Monday to Friday and 3.75 hours

his a

on Saturday. If he is paid P25.00 per hour, how much does he earn in

a

week?

Answer:

Filtration (The process of separating liquids and solids)

Explanation:

Filtration works best when the solute isn't dissolved in the solvent. Basically like how you can filter dirt or sand from water. The opposite of this would be if water and sugar where mixed together you cannot unmix this duo with filtration but with the example given you can use the process of filtration to rid the gasoline of sand.

#5

At 22min the temperature is at 40°C

#6

Graph ended at 20°C so condetion occured at 20°C

#7

After 70°C the matter got melted do its at liquid state

Answer:

4

Explanation:

water would be produced from 4 molecules of methane (CH4) reacting with 8 molecules of oxygen (O2)

The products of the combustion of hydrocarbon are 4 molecules of carbon dioxide and 8 molecules of water.

A combustion reaction can be described as a reaction that produces fire and takes place at a high temperature. It is an exothermic reaction as well as a redox reaction that usually takes place between a fuel and mostly oxygen gas.

Examples of Combustion Reactions such as during the combustion of 4 molecules of methane reacting with 8 molecules of oxygen gas to give carbon dioxide and two molecules of water.

[tex]4CH_4 + 8O_2\longrightarrow 8H_2O + 4CO_2[/tex]

Oxygen is the essential reactant for combustion because the combustion is not possible in the absence of oxygen. Complete combustion takes place when a fuel burns completely to produce heat with oxygen and carbon dioxide.

The burning of wood fuels in the presence of air is an example of combustion. The carbon present in wood reacts with oxygen gas in the air to liberate heat and form gaseous products.

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#SPJ2

Answer:

Oxygen has 6 valence electrons and follows the octet rule.

If you were drawing a lewis structure for O2, there would be a total of 12 valence electrons (6 x 2 = 12).

The completed structure would have a double bond between the two oxygen atoms with 2 lone pairs per oxygen, giving you a total of 8 electrons that are lone pairs (or dots).

The number of moles present in 29.5 grams of argon is 0.74 mole.

The atomic mass of argon is given as;

Ar = 39.95 g/mole

The number of moles present in 29.5 grams of argon is calculated as follows;

39.95 g ------------------------------- 1 mole

29.5 g ------------------------------ ?

[tex]= \frac{29.5}{39.95} \\\\= 0.74 \ mole[/tex]

Thus, the number of moles present in 29.5 grams of argon is 0.74 mole.

"Your question seems to be missing the correct symbol for the element"

Argon = Ar

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Answer:

The overall chemical reaction between baking soda (sodium bicarbonate) and vinegar (weak acetic acid) is one mole of solid sodium bicarbonate reacts with one mole of liquid acetic acid to produce one mole each of carbon dioxide gas, liquid water, sodium ions, and acetate ions. The reaction proceeds in two steps

Answer:

both

Explanation:

id say that it could occur but also not as much. the moon would be smaller and further from the earth to where we would barely be able to see it. if the full moon is barely visible then im sure the total solar eclipse wouldn't be as noticeable as it is now. but thats just my opinion

Answer:

H2S

Explanation:

the oxidation number of S is -2.

The concentrations of all species in a 0.100 M Na₂CO₃ are:  

1. The concentration of Na⁺ in the solution is 0.2 M.

2. The concentration of CO₃²¯ in the solution is 0.1 M

We'll begin by writing the dissociation equation for Na₂CO₃. This is illustrated below:

Na₂CO₃(aq) —> 2Na⁺(aq) + CO₃²¯(aq)

Thus, the species in Na₂CO₃ are Na⁺ and CO₃²¯

From the balanced equation above,

1 mole of Na₂CO₃ contains 2 moles Na⁺ and 1 mole of CO₃²¯

1. Determination of the concentration of Na⁺.

From the balanced equation above,

1 mole of Na₂CO₃ contains 2 moles Na⁺

Therefore,

0.100 M Na₂CO₃ will contains = 2 × 0.1 = 0.2 M Na⁺

Thus, the concentration of Na⁺ in the solution is 0.2 M.

2. Determination of the concentration of CO₃²¯

1 mole of Na₂CO₃ contains 1 mole of CO₃²¯

Therefore,

0.100 M Na₂CO₃ will also contains 0.100 M CO₃²¯

Thus, the concentration of CO₃²¯ in the solution is 0.1 M

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