Please help me it’s due today at 6:00pm will mark the brainiest and more points please help me

Answer:

0.017mole

0.0033M

Explanation:

Given parameters:

Formula of the compound:

           Mg(ClO₃)₂

Mass of the sample  = 3.24g

Unknown:

Number of moles of the sample = ?

Molarity  = ?

Solution:

The number of moles of any substance is given as:

   Number of moles  = [tex]\frac{mass}{volume}[/tex]  

 Molar mass of Mg(ClO₃)₂  = 24 + 2[35.5 + 3(16)]  = 191g/mol

    Number of moles  = [tex]\frac{3.24}{191}[/tex]   = 0.017mole

Molarity is the number of moles of a solute in a solution:

    Molarity  = [tex]\frac{number of moles }{volume}[/tex]  

 Volume given  = 5.08L

  Molarity  = [tex]\frac{0.017}{5.08}[/tex]  = 0.0033M

Answer:

This question appear incomplete

Explanation:

This question appear incomplete because an equation to show the production of sodium chloride from calcium chloride should have been illustrated. However, if the balanced chemical equation showing sodium chloride (NaCl) been a product of a reaction involving calcium chloride (CaCl₂) as a reactant (shown below) is to be used, then we start by writing a complete balanced chemical equation

CaCl₂ + Na₂CO₃  ⇒   CaCO₃ + 2NaCl

From the equation above, it can be deduced that 1 mole of CaCl₂ is required to produce 2 moles of NaCl, thus how many moles of CaCl₂ will be required to produce 6.5 moles of NaCl.

1 mole of CaCl₂ = 2 moles of NaCl

? moles of CaCl₂ = 6.5 moles of NaCl

cross multiply

? moles of CaCl₂ = 6.5 × 1/2

? moles of CaCl₂ = 3.25 moles of CaCl₂

3.25 moles of CaCl₂ will be needed to produce 6.5 moles of NaCl

Answer:

The correct option is e. 5

Explanation:

An element with the electron configuration [noble gas] ns² (n - 1)d¹⁰ np³ belongs to the nitrogen group element - group 15 - in a period higher than 2. The element could be As, Sb or Bi. For example, arsenic (As) has the electron configuration [Ne] 4s² 3d¹⁰ 4p³.

The valence electrons are those in the highest energy level, in a s or p sublevel. For the elements with the general electron configuration [noble gas] ns² (n - 1)d¹⁰ np³ has 5 valence electrons: 2 electrons in a s sublevel and 3 electrons in a p sublevel. The electrons in the d orbital are in a lowest energy level (n-1).

Therefore, the correct option is e. 5.

Explanation:

Common Lead Storage Battery Used In Automobiles, The Following Two Half-reactions Occur In Acid Solution: Oxidation Pb(s)+HSO−4(aq) → PbSO4(s) Reduction PbO2(s)+HSO−4(aq) → PbSO4(s). Write A Balanced Equation For The Overall Battery Reaction.

The mass percent for a solution : 35.42%

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

[tex]\tt \%mass=\dfrac{mass~solute}{mass~solution}\times 100\%[/tex]

mass solute = 85 g

mass solution = 85 + 155 = 240 g

[tex]\tt \%mass=\dfrac{85}{240}\times 100\%=35.42\%[/tex]

Answer:

Periods are horizontal and their number tells us the number of energy levels in an atom of that  element.

Groups are vertical and contain elements with similar properties.

Explanation:

The periodic table systematically arranges elements over one another based on their atomic numbers.

Elements having the same number of electrons in the outermost shell of their atoms are placed over one another in vertical columns called groups or family. Hence, elements in the same group will have similar chemical properties.

Elements in the same period have the same number of electronic shell. This number corresponds to the energy level of the elements.

Answer:

The options to this question are incomplete. The remaining two options are:

C. Water expands and becomes less dense when it freezes.

D. Water contracts and becomes less dense when it freezes.

The answer is C. Water expands and becomes less dense when it freezes.

Explanation:

Water is a chemical compound that exists in the three states of matter viz: solid as ICE, gas as vapour and liquid as WATER. However, due to the DENSITY properties of each state, ice floats on water. Ice is less dense than water.

When liquid water freezes, it's particles expands i.e increases in volume. Hence, it becomes less dense than water. This causes an iceberg to float on water because it has a lesser density compared to the liquid water caused by an expansion of its particles.

Answer:

answer is c

Explanation:

Answer:

B

Explanation:

Answer:

1.2506

Explanation:

Answer:

which is more likely to be reduced

Explanation:

Answer:

B

Explanation:

Answer:

mitosis

Explanation:

Answer:

Propionic acid reacts with NaOH(aq) to form sodium propionate and water.

acids -

citric acid- citrus fruits

lactic acid -milk

amino acids- protein

tannic acid -tea

malic acid -apple

Bases-

baking soda (Nahco3)

Answer:

[tex]m_{PbI_2}=36.2gPbI_2[/tex]

Explanation:

Hello!

In this case, since the chemical reaction that takes place when Pb(NO3)2 and NaI are mixed is:

[tex]Pb(NO_3)_2(aq)+2NaI(aq)\rightarrow PbI_2(s)+2NaNO_3(aq)[/tex]

By which a solid precipitate of PbI2  is produced. In such a way, since we know the volume and molarity of NaI, we can compute the moles of NaI as shown below:

[tex]n_{NaI}=0.765L*0.205\frac{molNaI}{L}=0.157molNaI[/tex]

Next, since it is in a 2:1 mole ratio with PbI2 (molar mass = 461.01  g/mol) we compute the mass of PbI2  precipitate as shown below:

[tex]m_{PbI_2}=0.157molNaI*\frac{1molPbI_2}{2molNaI}*\frac{461.01 gPbI_2}{1molPbI_2} \\\\m_{PbI_2}=36.2gPbI_2[/tex]

Best regards!

Answer:

a physical change does not change the composition (what it's made of) as a chemical change would.

Physical changes are differentiated from the chemical changes by means  of the state of the substance which is obtained after the change.

Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.

Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.

They involve only rearrangement of atoms and are often characterized to be changes which are reversible.

Learn more about physical changes,here:

https://brainly.com/question/17931044

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Answer:

Moles of magnesium chloride can be produced are 0.2 moles

Explanation:

The reaction of Mg with Cl2 is:

Mg + Cl₂ → MgCl₂

Where 1 mole of Mg reacts per mole of Cl₂ to produce MgCl₂.

As the reaction is 1:1, we need to convert the mass of both Mg and Cl₂ to moles. The lower number of moles will determine the moles of MgCl₂ that will be produced:

Moles Mg -Molar mass: 24.3g/mol-:

4.86g * (1mol / 24.3g) = 0.2 moles Mg

Moles Cl₂ -Molar mass: 24.3g/mol-:

21.27g * (1mol / 70.9g) = 0.3 moles Cl₂

As moles of Mg < moles of Cl₂, Mg is limiting reactant and moles of magnesium chloride can be produced are 0.2 moles

Answer:

1 mole of C3H8 reacts with __five__ moles of O2 to produce __three__ moles of CO2 and  of H2O.

Explanation:

Hope This Helps

Answer:

I think it's A not D or C maybe B probably A

Answer:

This question lacks options, the options are:

A). synthesizes more sugar

B). has a higher chromosome count

C). produces fewer proteins

D). uses less carbon dioxide

The answer is A

Explanation:

The chloroplast is an organelle present in the cells of photosynthetic organisms. It is the site where photosynthesis, which is the production of food (sugars) from sunlight energy, occurs.

According to this question, a cell in the leaf of a corn plant contains more chloroplasts than a cell in the stem of the same corn plant. Based on this observation, it can be inferred that the LEAF CELLS WILL SYNTHESIZE MORE SUGARS THAN THE STEM CELL because the more the chloroplast, the higher the photosynthetic rate and subsequently the higher the amount of sugar produced.

Answer:

Need ko point salamat mamaya ko yan sagutin d jowklang

28.00mL

Explanation:

transpiration good luck

Answer:

Transpiration

Explanation:

I took a quiz on the water cycle and this was the correct answer. if I am wrong then I am sorry but I'm pretty sure this is correct.

Answer:

I'm assuming this is for the SCl₆ compound and not SC₁₆? If so, the molecular geometry is octahedral.

Explanation:

There are 6 regions and zero lone pairs surrounding the central atom (S).

Answer:

no it would be 2.5 mill your welcome

Explanation:

Answer:

0.06457g of H₂

Explanation:

2Al(s) + 6H₂O(l) + 2KOH(aq) → 2K[Al(OH)₄](aq) + 3H₂(g)

Based on the equation 2 moles of Al produce 3 moles of hydrogen.

First, we need to convert mass of Al to moles and then with the chemical equation find moles and mass of hydrogen:

Moles Al (Molar mass: 26.982g/mol):

1.15g Al * (1mol / 26.982g) = 0.04262 moles Al

Moles H₂:

0.04262 moles Al * (3 moles H₂ / 2 mol Al) = 0.06393 moles H₂

Mass hydrogen (Molar mass: 1.01g/mol):

0.06393 moles H₂ * (1.01g/mol) =

Answer:

This observation can be explained under the following reasons:

Explanation:

High sodium content from the potato fluid causes the flame to turn yellow, as indicative of the presence of sodium (flame test).

The colour change could also be attributed to the drastic lowering of the burner heat. Finally, pure organics like wood and fats burn red, a would be the case with fluids from the boiled potatoes.

I hope this explanation was helpful.

The appearance of a yellow-orange color in the previously blue flame is due to the presence of sodium ions in the salted water.

The salted water in which the potato is being boiled contains sodium ions according to the equation:

[tex]NaCl ---> Na^+ + Cl^-[/tex]

Sodium ions generally give off yellowish color when burned in flames. Thus, when the pot boiled over, ions of sodium got into the flame on the gas burner and give off their characteristic flame color.

More on the flame test can be found here: https://brainly.com/question/6357832

Answer:

D I think

Explanation:

cuz 0 j means there is nothing moving

Answer:

D. when an object is no longer in motion.

Explanation:

Answer:

ΔS < 0

ΔH < 0

Explanation:

Recall that the process is crystallization. Crystallization involves conversion of aqueous ions back to solid. This process decreases the entropy of the system hence ΔS is negative.

But remember that a process is only spontaneous when ΔG <0 (negative). From;

ΔG = ΔH - TΔS

If  ΔS is negative, then (-TΔS) must be positive since  ΔS is negative. The only way to make the process spontaneous is to make ΔH negative so that ΔG also becomes negative.

Answer:

-233.1 J/K

Explanation:

The standard entropy change for the reaction C₂H₂(g) + 2 H₂(g) → C₂H₆(g), is B) -233.1 J/K.

Let's consider the following balanced equation.

C₂H₂(g) + 2 H₂(g) → C₂H₆(g)

Entropy is a measure of how much the energy of atoms and molecules becomes more spread out in a process. We can calculate the standard entropy change for the reaction (ΔS°rxn) using the following expression.

[tex]\Delta S \°_{rxn} = \Sigma n_p \times S_p\° - \Sigma n_r \times S_r\°[/tex]

where,

[tex]\Delta S \°_{rxn} = 1 mol \times S\°(C_2H_6) - 1 mol \times S\°(C_2H_2) - 2 mol \times S\°(H_2)\\\Delta S \°_{rxn} = 1 mol \times (229.2J/mol.K) - 1 mol \times (200.9J/K.mol) - 2 mol \times (130.7J/K.mol) = -233.1 J/K[/tex]

The standard entropy change for the reaction C₂H₂(g) + 2 H₂(g) → C₂H₆(g), is B) -233.1 J/K.

Learn more here: https://brainly.com/question/13146879