_H2+_Cl2->_HCl fill in the blanks if necessary.

Answer:

Numbers after atoms are subscripts. Numbers before atoms are coefficients.

Equation: 2Na +Cl2 -> 2NaCl

Given: 6.8 grams of Na  

Unknown: moles of NaCl

Set up: \(6.8g Na *\frac{1 mole Na}{22.99 g Na}*\frac{2 moles NaCl}{2 moles Na} =.2957 moles NaCl\)

Explanation:

We know that the reactants are Na and Cl and that what is being produced, the products, is NaCl.

Na + Cl -> NaCl

CAREFUL! Cl is a diatomic ion, is it gets a subscript of 2! This means there need to be 2 cl atoms on the right side as well. But now there are 2 Na on the right side. So we multiply Na by 2 on the left so that both sides have two Na atoms.

2Na +Cl2 -> 2NaCl

B)

We know that there are 6.8 grams of Na. This is our given.

What do we want to find out? We want to find how many moles of NaCl there are, so that is our unknown.

C) A mole ratio is exactly what it sounds like. From our balanced equation, we can see that there are 2 moles of Na  and 2 moles of NaCl. In other words, there are 2 moles of Na for every 2 moles Nacl. In notation, this is \(\frac{2 mole Na}{2 Mole NaCl}\) or 2:2. You can simplify to 1:1 ratio, but as equations get more complex I find it easier to not. It depends on what your teacher wants and what you find easier.  

D)

By set up I assume they mean stoichiometry (chemistry conversion) . First I'm going to split up the set up so that it is easier to understand.

We start with the given and convert that into moles Na. We can do this by remembering that there are 22.99 grams for every 1 mole Na:

6.8 g Na* \(\frac{1 mole Na}{22.99g Na} = .2957 moles Na\)

Now we can use that mole ration we found in part C to convert moles of Na into moles of NaCl:

\(.2957 moles Na *\frac{2 moles NaCl}{2 moles Na}= .2957\)

Usually, we will put these together to get

\(6.8g Na *\frac{1 mole Na}{22.99 g Na}*\frac{2 moles NaCl}{2 moles Na} =.2957 moles NaCl\)

Tip: in Stoichiometry, it is important to remember that your units should cancel out until you only have the units you want. If there are moles of Na in the numerator, there should be moles of Na in the denominator of the following fraction. If there are grams Na in the numerator, there should be grams Na in the denominator and so and so on until you are only left with the unit you want, which, in this case, is moles of NaCl.  

Answer:

1.25 moles

Explanation:

You have 2.5 moles of Cl on product side and you need to make that equal on the reactant side. You can see it is Cl2  so you need to half 2.5 by 2 so both sides are equal. 2.5/2=1.25

Bonds are formed by valence electrons of

interacting atoms. That is option C.

Bonding occurs to give both atoms a more stable electron configuration. That is option D.

Chemical bond is defined as the link or attraction that exist between atoms, ions or molecules that usually leads to the formation of new chemical compounds.

There are different types of chemical bonds which include:

Therefore, bonds are formed by valence electrons of interacting atoms.

Octet rule states that the total number of the electrons in the outermost shell should be equal to eight to maintain a stable electron configuration.

Therefore, bonding occurs to give both atoms more stable electron configuration.

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Answer: c: bonds are formed by Valence electrons or interacting atoms

d: bonding occurs to give both atoms a more stable electron configuration

Explanation:

Answer:

Fatty foods become rancid due to the process of rancidity

Answer:

6 seconds

Explanation:

1/4 = 25%

1/4 to 8 seconds would be 2/8 so

25 + 25 + 25 =75

Answer:

A.

Explanation:

zinc and hydrochloric acid reacts to form zinc chloride and hydrogen.

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Answer:

Density = 0.17 g/L

Explanation:

It is given that,

Volume of the inflated balloon filled with Helium, \(V=2.2\times 10^3\ L\)

Mass, m = 374 g

We need to find the density of helium. It is equal to its mass per unit volume. It can be given by :

d =m/V

\(d=\dfrac{374\ g}{2.2\times 10^3\ L}\\\\=0.17\ g/L\)

So, the density of helium in the balloon is 0.17 g/L.

Answer:

In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls allow plants to have rigid structures as varied as wood trunks and supple leaves; and vacuoles allow plant cells to change size.

Explanation:

Answer:

Calculate the energy of a photon having a wavelength of 7.71 x 10^-5 m.​

Explanation:

The concentration of the unknown \(H_3PO_4\) solution would be 0.0368 M

The equation of the reaction is as follows:

\(H3PO_4(aq)+3NaOH(aq)--- > 3H_2O(l)+Na_3PO_4(aq)\)

The mole ratio of the  \(H_3PO_4\) solution to the NaOH solution is 1:3.

But 0.140 M, 25.24 mL of NaOH was used.

Recall that: mole = molarity x volume (in Liters)

Mole of 0.140 M, 25.24 mL of NaOH = 0.140 x 25.24/1000

                                                             = 0.0035336 mol

Following the mole ratio, the equivalent mole of \(H_3PO_4\) would be:

0.0035336 /3 = 0.00117786666

Recall that: molarity = mol/volume (in Liters)

Molarity of 0.00117786666 mol, 32.00 mL \(H_3PO_4\) = 0.00117786666/0.032

                                                                                  = 0.0368 M

In other words, the molarity of the \(H_3PO_4\) solution to 3 significant figures is 0.0368 M.

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Considering the definition of polar molecule, Br has a negative partial charge and H a ​​positive partial charge.

The bond dipole moment can then be defined as the magnitude of the polarity in a bond. This moment represents the distribution of electron density in a bond.

The distribution of charges is due to the fact that the atoms that form them have different electronegativity, in such a way that when a covalent bond is created and the electrons are shared, the electrons of the bond are attracted with different force by the atoms that share them.

Then, a polar molecule is one that is neutral, that is, it does not have a net charge. But it has an internal distribution of charges that form a partially positive region and a partially negative region.

That is, polar bonds are established between atoms of different electronegativity, so that the atom with higher electronegativity will attract the electrons towards itself, giving rise to two opposite charges in the bond and  creating a negative charge on the atom because the electrons have negative charge.

In this way, in a polar molecule there is separation between positive and negative charges. The bonds will be the more polar the greater the electronegativity difference between the bonded atoms.

In this case,  bromine Br has a higher electronegativity and attracts electrons shared with hydrogen H more strongly. Then Br has a negative partial charge and H a ​​positive partial charge.

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Explanation:

kinetic energy Increases due to gravity. A rock being pushed down a hill increases in speed, due to gravity, what goes up must come down....

Answer:

10.53m/s

Explanation:

Initial velocity: 13m/s

Angle of projection: 55deg

Y-component of velocity is given as usin⌀

Plugging in, we get

= 13 * sin(55deg)

= 13 * 0.81

= 10.53

⇒ 10.53m/s

Answer:

\(\boxed {\tt A \ marble \ is \ small}\)

Explanation:

A marble is not a very large object, so a smaller graduated cylinder is a better choice.  A 100 milliliter graduated cylinder is not needed to measure the volume of a small marble, so a 25 milliliter graduated cylinder is the best option.

Before administering eye drops, make sure to wash your hands thoroughly with soap and water to minimize the risk of introducing any contaminants.

Tilting your head back or lying down can help create a better angle for administering the eye drops and prevent them from running out of your eye.

Use your index finger to gently pull down the lower eyelid, creating a small pocket.

Carefully hold the dropper tip close to your eye, without touching your eye or eyelashes.

Follow the specific instructions provided with your eye drops to determine the appropriate number of drops to use. Squeeze the dropper to release the drops into the pocket created by pulling down your lower eyelid.

If any excess solution has spilled onto your skin, gently wipe it away with a clean tissue or cloth to avoid irritation.

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Considering the definition of empirical and molecular formula, the isomer of a compound with an empirical formula of C₂H₆O₂ is C₄H₁₂O₄.

The empirical formula is the simplest expression to represent a chemical compound, which indicates the elements that are present and the minimum proportion in whole numbers that exist between its atoms, that is, the subscripts of chemical formulas are reduced to the most integers. small as possible.

The molecular formula is the chemical formula that indicates the number and type of different atoms present in the molecule. The molecular formula is the actual number of atoms that make up a molecule.

The molecular formula of a compound can be the same as its empirical formula or a multiple of it. So by simplification, the simplest possible integers are found, so as to find the empirical formula.

The given isomer of a compound is C₄H₁₂O₄. For this isomer, simplifying (dividing by 2) the corresponding ratios between the elements, you get the empirical formula C₂H₆O₂.

In summary, the isomer of a compound with an empirical formula of C₂H₆O₂ is C₄H₁₂O₄.

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Answer:

\(m_{PbI_2}=18.2gKI\)

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

\(2KI+Pb(NO_3)_2\rightarrow 2KNO_3+PbI_2\)

Thus, we proceed to compute the reacting moles of Pb(NO3)2 and KI, by using the given concentrations and densities and molar masses which are 331.2 g/mol and 166 g/mol respectively:

\(n_{Pb(NO_3)_2}=96.7mL*\frac{1.134g}{mL}*\frac{0.14gPb(NO_3)_2}{1g}*\frac{1molPb(NO_3)_2}{331.2gPb(NO_3)_2} =0.0464molPb(NO_3)_2\\\\n_{KI}=99.8mL*\frac{1.093g}{mL}*\frac{0.12gKI}{1g}*\frac{1molKI}{166gKI} =0.0789molKI\)

Next, the 0.0464 moles of Pb(NO3)2 will consume the following moles of KI (consider their 1:2 molar ratio):

\(n_{KI}^{consumed\ by\ Pb(NO_3)_2}=0.0464molPb(NO_3)_2*\frac{2molKI}{1molPb(NO_3)_2} =0.0928molKI\)

Hence, as only 0.0789 moles of KI are available, KI is the limiting reactant, therefore the formed grams of PbI2, considering its molar mass of 461.01 g/mol and 2:1 molar ratio, are:

\(m_{PbI_2}=0.0789molKI*\frac{1molPbI_2}{2molKI} *\frac{461.01gPbI_2}{1molPbI_2} \\\\m_{PbI_2}=18.2gKI\)

Best regards.

Answer:

oxygen and hydrogen :)

Explanation:

Here is the complete explanation about labeling guidelines.

Signal words are found on the  pesticide product labels.

Of to the end, and they describe the acute to  (short-term) toxicity of to by  formulated pesticide of the  product.

The signal word can become either: DANGER and be the  WARNING . Products with to the DANGER signal word are the   most toxic. Products of  with the signal word in the  WARNING are lower in the  toxicity.

So the correct is danger of  because it's indicated by  flammable and high toxic.

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Answer:

3 atoms of Ba

2 x 1 = 2 atoms of Cl

2 x 3 = 6 atoms of O

So, the total number of atoms for each element in 3Ba(ClO3)2 are:

Barium (Ba): 3 atoms

Chlorine (Cl): 2 atoms

Oxygen (O): 6 atoms

Explanation:

1) Diesel has a higher viscosity than petrol.

2) Petrol is more flammable than diesel.

3) The formula will be C₁₀H₂₂.

4) The equation is; 2C8H18+25O2→16CO2+18H2O.

Depending on the precise composition and temperature, the viscosity of gasoline and diesel can change. In general, diesel is more viscous than gasoline. Higher viscosity fluids are thicker and flow more slowly than lower viscosity fluids because viscosity relates to the resistance of a fluid to flow.

Diesel is less flammable than gasoline. The lowest temperature at which gasoline can evaporate and turn into an ignitable combination in air is known as its flash point, and it is lower for gasoline. Compared to diesel fuel, petrol vapors are much more flammable and can ignite at lower temperatures.

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Answer:

Heat energy = 8669.32J

Explanation:

Mass = 122g

Change in temperature ∇T = 17°C

Specific heat capacity (c) = 4.18J/g°C

Heat energy (Q) = ?

Heat energy (Q) = mc∇T

Q = heat energy

M = mass of the substance

C = specific heat capacity of the substance

∇T = change in temperature of the substance

Q = mc∇T

Q = 122 × 4.18 × 17

Q = 8669.32J

The heat energy required to raise 122g of water by 17°C is 8669.32J

Answer:

\(Q=8669.3J=8.67kJ\)

Explanation:

Hello,

In this case, we can compute the absorbed heat of water needed to raise its temperature by 17 °C by using the following formula:

\(Q=mCp\Delta T\)

In this case, the mass is 122 g, the specific heat 4.18 J/(g°C) and the temperature change 17 °C, hence the heat turns out:

\(Q=122g*4.18\frac{J}{g\°C}*17\°C\\ \\Q=8669.3J=8.67kJ\)

Best regards.

Answer:

How do amoeba respire.

Define Diffusion.

Answer:

Explanation:

Answer: Sí

Explanation: ya que una mascota es inofensiva, pero para fotografiar a un animal salvaje, debes esperar pacientemente el momento perfecto

Answer:  Coastal dunes are a ridge, or a series of ridges, that form at the rear of a beach and differ from most other constructional coastal landforms in that they are formed by the movement of air (aeolian transport) rather than by tidal, wave, or current action.A coastal plain is a flat, low-lying piece of land next to the ocean. Coastal plains are separated from the rest of the interior by nearby landforms, such as mountains. In western South America, a large coastal plain lies between the Andes Mountains and the Pacific Ocean.

Explanation:

Answer:  Both have low elevation.

Explanation:

hope it helped xx

The calculations show that Mg(OH)₂ has a solubility of  3.5 × 10⁻⁵ M at a pH of 12.80.

The term pH, which stands for "potential of hydrogen ions," can be interpreted as a measurement of the molar concentration of hydrogen ions in a particular solution. Hence, the acidity, neutrality, or basicity of any chemical solution is often determined or specified using the power of hydrogen ions (pH).

Mg(OH)₂⇔Mg²⁺(aq)+2OH⁻(aq)

First of all, we would write the chemical equation for this chemical reaction that is appropriately balanced

The Ksp for the aforementioned chemical reaction is determined mathematically by:

Ksp = [Mg²⁺][OH⁻]²

Ksp = [x][2x]²

1.6 × 10⁻¹³ = 4x³

x = ∛4 × 10⁻¹⁴

x = 3.5 × 10⁻⁵ M.

The maximum amount of a chemical that will dissolve in a particular amount of solvent at a particular temperature is known as its solubility. Different compounds have very varying solubilities, which is a characteristic of a particular solute-solvent pair.

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