[Then mother noticed that two children who are watching the game are sick and coughing.She told her son to keep distance from those children to avoid getting sick]

1.Observe illustration no.1 and read the caption.Why did the mother ask her son to avoid the kid with cough?

2.Observe illustration no.2 and read the caption.Why did the mother let her son play with the kid with asthma?

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Reactions I and II are spontaneous reactions since they have negative delta G values.

Spontaneous reactions are reactions which proceed towards formation of products without addition of heat energy from the surroundings.

Spontaneous reactions have negative free energy change values (Delta G is negative) since the formation of products results in increase in entropy of the system.

Therefore, the spontaneous reactions are I and II because their delta G values are negative.

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Answer: A (I and II

Explanation:

Answer:

17.03052

Explanation:

thats the answer i got hope this helps at all

One potential drawback of using fuels cells in cars is that it require large tanks for hydrogen storage.

Fuel cells are cells which use hydrogen and oxygen as fuel to produce electrical energy for use in various purposes such as in powering cars.

The energy produced is as a result of redox reactions.

Fuels cells are clean renewable energy sources.

A potential drawback of using fuels cells in cars is that it require large tanks for hydrogen storage.

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Answer:

[tex]\\ \rm\dashrightarrow Chemical\: Equation [/tex]

Explanation:

When a chemical change happens or chemical reaction happens something yields at reactants and something at products

Representing them is called chemical equation

Answer:

The answer is c hope it is right if it is rong please tell me tho :)

The combined gas law is used to determine the relationship between the pressure, temperature, and volume of the gas. The volume of the gas at 0.250 atm is 236 L. Thus, option A is correct.

The combined gas law uses the ideal gas equation to estimate the temperature, volume, or pressure of the given gas.

Given,

Initial pressure = 0.500 atm

Initial temperature = 288.15 K

Initial volume = 120 L

Final pressure = 0.250 atm

Final temperature = 283.15 K

The final volume is calculated as:

V₂ =  (P₁V₁ T₂) ÷ (P₂ T₁)

= 0.500 × 120 × 283.15 ÷ 0.250 × 288.15

= 16989 ÷ 72.03

= 235.86 L

Therefore, 236 L is the final volume at 0.250 atm.

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Answer:

32

Explanation:

The total valence electron is available for the Silicon tetrachloride

lewis structure is 32

Answer:

15M

Explanation:

To find molarity, you use the equation :

Molarity = [tex]\frac{moles of solute}{liters of a solution}[/tex]

So to find the molarity, you would do 90mols of the solute divided by 6 liters of the solvent which is 15M.

Answer:

activation energy

Explanation:

it is activation energy becauseThe activation energy for the forward reaction is the amount of

free energy that must be added to go from the energy level of the

reactants to the energy level of the transition state

Lower rate after another 3 seconds of the given rate is concentration of reactants increased while the concentration of product decreased.

Rate of the reaction gives idea about the speed of the completion of the reaction or the formation of product.

Given rate of reaction = 1.8×10⁻⁶ m/sec

After 3 seconds rate of the reaction decreases, which means speed of the formation of product decreases as a result of which:

Hence, concentration of reactants increased while the concentration of product decreased.

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Answer:

B.  The concentration of reactants decreased while the concentration of product increased.

Explanation:

i took the test

The amount of energy released by the reaction b. 3.28 x 10(-37)J

A nuclear fission reaction in which the nucleus is divided into numerous small nuclei.

The mass difference is 0.0593

To calculate the energy

[tex]E = \Delta mc^2\\\\c = 3 \times 10^8\;m/s\\\\m = 3.86 \times 10^-^3 \;kg\\[/tex]

Putting the values in the equation

[tex]E = (0.0593) (3 \times 10^8\;m/s)^2 = 5.337 \times 10^1^5[/tex]

Thus, the correct option is b. 3.28 x 10(-37)J

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The fission of uranium-235  leads to the equation; 235/92U + 1 neutron → 92/36Kr + 141/56Ba + 3 neutrons + energy.

The term fission reaction refers to the reaction in which a nucleus is bombarded with a particle  which causes the nucleus to break down. This leads to the release of energy.

The fission of uranium-235  leads to the equation; 235/92U + 1 neutron → 92/36Kr + 141/56Ba + 3 neutrons + energy.

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What type of rock is the wave made of?

Answer: The Wave is a natural formation of ~sandstone rocks~

Answer:

n=0.648 moles

the ratio 5:6

x:0.648

x=0.54 moles

Answer:

33,666

Explanation:

is the dictionary definition of a word.

is the feeling or idea associated with a word.

Answer:

To produce 1 mole of N2O required 1 mole of NH4NO3 . Hence, 60 grams of NH4NO3 are required to produce 33.0 g N2O

Explanation:

HOPE IT HELPS.

PLEASE MARK ME AS BRAINLIEST.

Answer:

In an ionic bond, metals lose electrons to become Cations.

Explanation:

Metal atoms lose electrons to form positive ions (cations).

the percent yield: 9/21 x 100% = 42.9%

Answer:

267.57 kPa

Explanation:

Ideal gas law:

PV = n RT        R = 8.314462    L-kPa/K-mol

P (16.5) = 1.5 (8.314462)(354)       P = 267.57 kPa

The volume of nitric oxide that will diffuse out of the partition in 10 seconds when methane diffuses is 62.5 mL

This is defined as the amount diffused per unit time. Mathematically, it can be expressed as

Rate = volume / time

Rate = volume / time

Rate = 25 / 4

Rate = 6.25 mL/s

Rate = volume / time

6.25 = volume of nitric oxide / 10

Cross multiply

Volume of nitric oxide = 6.25 × 10

Volume of nitric oxide = 62.5 mL

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Answer:

The HCS now requires the following elements on labels of hazardous chemicals: Name, Address and Telephone Number of the chemical manufacturer, importer or other responsible party

Explanation:

I tried, I think this is the correct answer.

The can will burst at 938.45 K.

Gay Lussac's Law states that the pressure of a fixed amount of gas is directly proportional to the absolute temperature at constant volume.

i.e. P ∝ T

P= KT

P₁ = KT₁

P₂ = KT₂

Here we have considered that the gas is at two different temperatures and pressures which is denoted by T₁ , T₂ and P₁ , P₂

It can also be written as

(P₁ /P₂ )  = (T₁ / T₂)

It is given that

P₂ = 14.29 atm

P₁  = 4.535 atm

T₁ = 298.15 K

T₂ = ?

T₂ = (298.15 * 14.29 )/ 4.54

T₂ = 938.45 K

Therefore the can will burst at 938.45 K.

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H2 + Cl2 → 2 HCl - Equation Balanced

Explanation:

Two elements H2and Cl2 combine to from a single compound, HCl. Hence, it is a combination reaction As two elements combine to from a compound, it is an element - element combination.

I hope it'll help you...

Answer:

2 moles of oxygen

Explanation:

Basic Equation (given) :

2H₂ (g) + O₂ ⇒ 2H₂O (g)

Taking the number of moles of oxygen and water in proportion :

Therefore, 2 moles of oxygen are required to make 4 moles of water.

[tex] \textsf{\qquad\qquad\huge\underline{{\sf Answer}}} [/tex]

As per the given equation, we can infer that :

For getting 2 moles mole of water, 1 mole of oxygen gas was required. so to get 4 moles of water we need :

We just have to multiply the whole reaction by 2 on both sides, in order to get 4 moles of H2O on product side.

[tex] \qquad \qquad \rm4 \: H_2 + 2 \: O_2 \rightarrow4 \: H_2O[/tex]

therefore, we need

[tex]\qquad \sf  \dashrightarrow \: 2 \times 1 = 2 \: moles \: \: oxygen \: gas[/tex]

The total mass of hydrogen gas in grams in the balloon given the data is 1.5 g

The new mole of the gas can be obtained by using the ideal gas equation as follow:

PV = nRT

V / n = RT / P

RT / P = constant

V₁ / n₁ = V₂ / n₂

0.75 / 0.15 = 3.75 / n₂

5 = 3.75 / n₂

Cross multiply

5 × n₂ = 3.75

Divide both sides by 5

n₂ = 3.75 / 5

n₂ = 0.75 mole

Mass = mole × molar mass

Mass of H₂ = 0.75 × 2

Mass of H₂ = 1.5 g

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Answer:

Explanation:

pure chemical substances and element.

All elements are pure. If this sample of copper had been impure, we would call it a mixture, not an element.

Answer:

Hydrogen bonding is a special type of dipole-dipole interaction that occurs between the lone pair of a highly electronegative atom (typically N, O, or F) and the hydrogen atom in a N–H, O–H, or F–H bond.