HELP ASAP!!!!

Identify each substance as a molecular compound or an
ionic compound, and then calculate its molar mass.
a. Sr(NO3)2
b. (NH)3PO4 C. C12H22O11

Answer:i don't rlly get the question but this is what i found on the internet :/

Explanation:

When the temperature is increased, the position of equilibrium moves in the endothermic direction to reduce the temperature. ... This means that as the temperature is increased, the position of equilibrium moves to the left, and the yield of ammonia decreases.

Answer:

−7.389056fo3+5.436564f

−l2o3+2l

Explanation:

2al+f(2.7182822)o3=al2o3+2f(2.718282)

Step 1: Add -al^2o^3 to both sides.

7.389056fo3+2al+−al2o3=al2o3+5.436564f+−al2o3

−al2o3+7.389056fo3+2al=5.436564f

Step 2: Add -7.389056fo^3 to both sides.

−al2o3+7.389056fo3+2al+−7.389056fo3=5.436564f+−7.389056fo3

−al2o3+0fo3+2al=−7.389056fo3+5.436564f

Step 3: Factor out variable a.

a(−l2o3+2l)=−7.389056fo3+5.436564f

Step 4: Divide both sides by -l^2o^3+2l.

a(−l2o3+2l)

−l2o3+2l

=

−7.389056fo3+5.436564f

−l2o3+2l

a=

−7.389056fo3+5.436564f

−l2o3+2l

Answer: the awnser is A

Explanation:

Edge 2020

Answer:

d

Explanation:

a positive change in enthalpy is required to break a bond, while a negative change in enthalpy is accompanied by the formation of a bond. Bond breaking in endothermic because it requires energy, therefore delta H is positive.

Answer: 824.6 g of NaCl are produced from 500.0 g of chlorine.

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]  [tex]\text{Moles of} Cl_2=\frac{500.00g}{71g/mol}=7.04moles[/tex]

[tex]2Na+Cl_2\rightarrow 2NaCl[/tex]  

According to stoichiometry :

1 mole of [tex]Cl_2[/tex] produce = 2 moles of [tex]NaCl[/tex]

Thus 7.04 moles of [tex]Cl_2[/tex] will produce=[tex]\frac{2}{1}\times 7.04=14.08moles[/tex]  of [tex]NaCl[/tex]

Mass of [tex]NaCl=moles\times {\text {Molar mass}}=14.08moles\times 58.5g/mol=824.26g[/tex]

Thus 824.6 g of NaCl are produced from 500.0 g of chlorine.

Answer:

6250

Explanation:

so m=500 and v=5

so v²=25

using the equation we can do 1/2 x 500 x 25 = 6250

Answer:

0.0308 mol

Explanation:

In order to convert from grams of any given substance to moles, we need to use its molar mass:

Now we calculate the number of moles of KAI(SO₂)₂ contained in 5.98 g:

Answer:

better mileage on cars, took lead out of paint, smaller packaging like for delivery and store products, EPA laws updating

Answer:

Reducing pollution from transportation sources has led to healthier air for Americans. In cities, smog has been visibly reduced.

Explanation:

i hope this helped

Answer:

its diffusion can i get brainly pleasee tyyy

Answer:

Iodide ion, I- will form the weakest bond with sodium ion, Na+

Explanation:

Electronegativity is the ability with which a neutral atom attracts electrons to itself.

The electronegativity of the halogens decrease on going down the group among the halogens. This is is because on going down the group, the atomic size as well as ionic size of the atoms in the group increases. This increase decreases the effect of the attraction of the positive nucleus on the electrons. Thus, valence electrons can be more readily removed.

The transfer of electrons from metallic sodiummto a halogen results in annionic bond between the two atoms. The strength of the ionic bond decreases on going down the group due to decrease in electronegativity. Thus, iodide ion, I-, which is the least electronegative among the given options will form the weakest bond with Na+.

Answer:

1921 :3 espero y te ayude crack

Answer:

Metallic Bonding

Explanation:

Conductivity occurs when electrons or ions are free moving. The conductivity in metals is due to electrons being delocalized in a sea of electrons. Metals contain metallic bonding which allows the electrons to freely move.

Malleability happens when adjacent layers of positive ions move relative to one another while being in contact with the sea of electrons from the metallic bonding.

Answer:

Molar mass of H2CO3 : 62.03 g/mol

Answer:

144 km y 180 km respectivamente.

Explanation:

¡Hola!

En este caso, dado que tenemos dos trenes con velocidades diferentes, es posible multiplicar la velocidad de cada tren por el tiempo común, con el fin the hallar la distance recorrida; es de entender, que a mayor velocidad, mayor distance ha de recorrer el tren:

[tex]d_1=72km/h*2h=144km\\\\d_2=90km/h*2h=180km[/tex]

Así, entendemos que el tren número 1 recorre 144 kilómetros, mientras que el tren número 2, 180 kilómetros.

¡Saludos!

Answer:

Air and Water Temperature Increases

An increase in the air temperature will cause water temperatures to increase as well. ... Lower levels of dissolved oxygen due to the inverse relationship that exists between dissolved oxygen and temperature. As the temperature of the water increases, dissolved oxygen levels decrease.

Answer:

0.2763M NaOH

Explanation:

Based on the reaction of hydrogen phtalate, KHP, with sodium hydroxide, NaOH:

KHP + NaOH → KNaP + H₂O

1 mole of KHP reacts per mole of NaOH.

In the equivalence point, the moles of NaOH added = Moles of KHP that were dissolved.

Thus, to solve this question, we must find the moles of KHP = Moles NaOH. With the moles and the volume of NaOH required to reach the equivalence point we can find molarity of NaOH solution:

Moles KHP = Moles NaOH (Molar mass KHP = 204.22g/mol):

1.518g * (1mol / 204.22g) = 7.433x10⁻³ moles NaOH

In 26.90mL = 0.0269L:

7.433x10⁻³ moles NaOH / 0.02690L

Answer:

bbfbtbryn'(tbtehtgrntn'ey(yntehtheyjey'y'y'yyt'yj't'yjyyngggengt-(jh

Explanation:

Answer:

.

Explanation:

Answer:

(−ΔH°1)+12(−ΔH°2)+(ΔH°3)+(ΔH°4)

I hope this helps you out!! :)

Answer:

trio

Explanation:

Answer: Composition is an orderly arrangement of visual structures (elements and principles) to create a mood, add meaning and direct the viewers' attention to the purpose of the artwork. Compositions are said to be 'designed' according to the specific intent of the artist.

The statement that describes the Arrhenius interpretation of acids and bases is that it is limited to situations that involve aqueous solutions or specific compounds. Therefore, option D is correct.

Arrhenius's interpretation defined an acid as a substance that increases the concentration of hydrogen ions (H⁺) when dissolved in water and a base as a substance that increases the concentration of hydroxide ions (OH⁻) when dissolved in water.

According to Arrhenius's interpretation, when an acid is dissolved in water, it releases H⁺ ions, which then react with water molecules to form H₃O⁺ ions, also known as hydronium ions.

Similarly, when a base is dissolved in water, it releases OH⁻ ions, which then react with water molecules to form H₂O molecules and more OH⁻ ions. Thus, option D is correct.

Learn more about Arrhenius, here:

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Answer:

Explanation:

Silicon dioxide doesn't have any mobile electrons or ions - so it doesn't conduct electricity either as a solid or a liquid.

Answer: volume decreases

Answer:

D. 108 grams/100g of H2O

Explanation:

I found the line KNO3 and when the line is at x value 60, it has the y value 108

id.k how to explain it it's just on the graph, ig just look at where it intersects both values

hope this helps

Answer:

Final Temp = 23.92°C

Explanation:

ΔH(total) = (m·c·ΔT)ice + (m·ΔH(f))melt'g + (m·c·ΔT)water

2182.5j = (5g)(2.092j/g·°C)(1°C) + (5g)(334.56j/g) + (5g)(4.184j/g·°C)(ΔT)

(2182.5 - 10.46 - 1672.8)j = 20.92j/°C·ΔT

ΔT = (2182.5 - 10.46 - 1672.8)j / 20.92j/°C = 23.92°C

Since the melting ice starts and ends at 0°C and is then warmed to 23.92°C then the temperature change is also the final temp of the water based upon given energy input values.

Answer:

1 atom only with the unit u.

Explanation:

The formula mass of a substance is defined as the sum of the atomic masses of all atoms in a formula unit of the particular substance in question.

Thus the correct answer is option A

Explanation:

f, br, b, A1, CA, na in order of increasing electronegativity

While metallic bonds have the strong electrostatic force of attractions between the cation or atoms and the delocalized electrons in the geometrical arrangement of the two metals. ... Metallic bonds are malleable and ductile, while covalent bonds and ionic bonds non-malleable and non-ductile.

Answer: D. The chemical products of one are the reactants of the other.

I just took the quiz

Cellular respiration and photosynthesis related as the chemical products of one are the reactants of the other and the correct option is option D.

Respiration is something that occurs in all living organisms. Thus, it is a process that converts oxygen and glucose into carbon dioxide and water and ultimately makes energy for your body cells.

On the other hand, photosynthesis takes place in green plants that contain chlorophyll. In this process, they make use of sunlight and water for converting it into energy.

Plants release oxygen which is a by-product of photosynthesis, and we breathe in oxygen so that our cells can carry out cellular respiration and generate ATP.

Therefore, Cellular respiration and photosynthesis related as the chemical products of one are the reactants of the other and the correct option is option D.

Learn more about the Difference between Respiration and Photosynthesis, here:

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