What is the H 2 : H2O molar ratio?

Answer:

Weather:

- The wind is blowing from the south.

- There is a thunderstorm warning.

- The average high temperatures for July in Yellowknife is 32.5 degrees Celcius.

- The wind is blowing at 56 km / hr.

Climate:

- The average temperature for February in Australia is 19 degrees Celsius.

- The average rainfall for June in Kenya is 3.3cm.

- 10mm of rain fell today.

- It is usually cold in Ottawa in January. -There was a cold weather advisory on Jan 21 2020.

-Hurricanes are most likely to hit the Gulf of Mexico and the Carribean.

Explanation:

Hope it helps.

To make a 5.00 M solution using 210.0 grams, g, of sodium chloride, NaCl, we will use the formula of volume of solution in liters is equal to mole of solute per molarity of solution, which is 0.718 L.

Molarity (M) refers to the amount of a substance in a specific volume of solution. It is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution.

Molarity  is given by the quotient,

Molarity = moles of solute/volume of solution in liters.

Now in order to get the molarity of the solution, we have to divide the moles of solute over the liters of solution. Since we are given the mass of the solute, we must first convert the mass of NaCl into moles with the help of the molar mass of NaCl as a conversion factor.

210 NaCl x ( 1 mol NaCl/ 58.44g NaCl) = 3.59 mol NaCl.

We already have the molarity of the solution that is 5.00 M. So the solution to find out the volume will be,

Volume of solution in liters = mole of solute/ molarity of solution,

That is 3.59 mol NaCl / 5M = 0.718 L

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Answer:

C

Explanation:

The answer is in the image.

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Walk in faith and trust in God!

Based on the half-life of the material, the isotope is radium-226; option D

The half-life of a substance is the time taken for half of the amount of material present in the original sample of the material to decay.

The half-life of materials differs from each other. The half-life may be in millions of years for some materials, whereas for some materials, the half-life could only be in seconds.

The half-life of materials is constant.

Considering the given material;

One-eighth of the mass of the original sample of the radioisotope remains unchanged after 4,800 years.

For one-eight of the material of the isotope to remain, the number of half-lives it has undergone will be;

after one half-life = half of the original sample remains

after two half-lives = one-fourth of the original sample remains

after three half-lives = one-eight of the original sample remains

The half-life of the isotope = 4800/3

The half-life of the isotope = 1600 years

Radium-226 has a half-life of 1600 yers

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The formula of De Broglie is the following:

Remember that the mass of an electron is 9.11 x 10 ^(-31) kg, so replacing in the formula, we're going to obtain:

The answer is that the wavelength of an electron traveling at 1.48 x 10^(5) m/s is 4.91 x 10^(-9) m.

Answer:

A is the correct option

Explanation:

batteries have chemical energy and will convert to electricity and when reached to bulb, it emits light as electromagnetic rays

Answer:b

Explanation:

i took the test

Answer:

H2SO4 + Mg(OH)2 → H2O + MgSO4

Explanation:

when magnesium hydroxide reacts with sulfuric acid you get magnesium sulfate

hope this helps

The noble gas is Kyrpton

The ideal gas equation is give below:

PV = nRT

number of moles n = mass/molar mass

n = m/Mm

therefore, the ideal gas equation becomes;

PV = mRT/Mm

Mm = mRT/PV

substituting the data provided

Mm = 1.07 * 308 * 8.314/90.3 * 0.363

Mm, molar mass = 83.6

the noble gas that has a mass of 83.6 is Krypton.

Therefore, the noble gas is Kyrpton

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Answer:

C

Explanation:

on a graph, the line would be straight if it is constant speed

Answer:

c

Explanation:

its staying at the same speed in a straight line

The correct option is $26785.To calculate the total cost per equivalent unit using the weighted average method, we need to consider the costs incurred in both the beginning work in process and the units added during the period.

First, let's calculate the equivalent units of production for both conversion and materials:

Conversion costs:

Beginning work in process: 400 units × 20% complete = 80 equivalent units

Units added during the period: 2,000 units × 40% complete = 800 equivalent units

Total equivalent units for conversion = 80 + 800 = 880 equivalent units

Material costs:

Beginning work in process: 400 units × 30% complete = 120 equivalent units

Units added during the period: 2,000 units × 50% complete = 1,000 equivalent units

Total equivalent units for materials = 120 + 1,000 = 1,120 equivalent units

Next, let's calculate the total costs incurred:

Conversion costs:

Beginning work in process cost: $14,880

Costs added during the period: $409,200

Total conversion costs = $14,880 + $409,200 = $424,080

Material costs:

Beginning work in process cost: $9,900

Costs added during the period: $180,080

Total material costs = $9,900 + $180,080 = $189,980

Now, we can calculate the total cost per equivalent unit:

Total cost per equivalent unit = (Total conversion costs + Total material costs) / (Total equivalent units for conversion + Total equivalent units for materials)

Total cost per equivalent unit = ($424,080 + $189,980) / (880 + 1,120)

Total cost per equivalent unit ≈ $267.85

Therefore, the correct option is $26785.

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Answer:

100gmol

Explanation:

When water moves in a certain direction because of uneven heating the phenomenon is called Convection. Fluids are substances that can flow. One example which can be subject to Convection is Air.

When air is heated, it rises above dry and or cool air which is heavier. So the cool air is displaced most likely moves towards the source of the heat.

If the process of heating continues or is constant, this will create a movement between both kinds of air hence - convection occurs.

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Addition of anything which increases the ionic interaction of the solution may change the solubility.

This is defined as the ability of a substance(solute) to form a solution with a solvent such as water.

In the calculation of a solubility activities it is best to take note of any additional substance as it could increase the ionic interactions thereby leading to a change in solubility.

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The interactions taken into account when doing solubility calculations is that if we add anything which increases the ionic interaction of the solution this may change the solubility of the solute.

Solubility is the degree to which a substance dissolves in a solvent to make a solution.

In this case, the interactions taken into account when doing solubility calculations is that if we add anything which increases the ionic interaction of the solution this may change the solubility of the solute.

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The characteristics of the reactivity of the periodic table allows to find the correct answers to the different questions are:

1) Metals on the right have more protons, causing valence electrons to be held more strongly.

2) They are very nonreactive.

3) Na and Br

4) Rb loses an electron

1) The reactivity of a chemical element is the tendency to combine with others, this increases as it has fewer electrons in its last layer and since they are more weakly bonded.

Consequently, halogens have seven electrons in their last shell tends to attract an electron to remain with the full level and the alkaline that an electron has in the last shell tends to lose the electron to remain with a complete shell.

If we examine the periodic table the number of electrons in the last shell decreases from right to left.

Let's review the different claims:

a) False. The elements on the right side have a higher atomic number, therefore more protons.

b) True. The elements have more protons therefore it has to attract other electrons and the reactivity decreases.

c) False. As it has more electrons, it has more energy levels, losing all the electrooens is more difficult, so the reactivity decreases.

d) False. By having more electrons it has more energy levels.

2) What is the unique characteristic of the elements of group 18

The elements of group 18 are the noble gases, they have their last full layer therefore they do not have.

the correct answer is:  They are very nonreactive.

3) The reactivity in the period table decreases with increasing period therefore the element of period 3 is the most reactive in this case Sodium and Halogen of group 5 is the most reactive in this case Bromine.

the compound Na and Br is the most reactive of all.

4) Rubidium has 1 electron in its last shell, both in a chemical reaction pole loses the electron.

the correct answer is: Rb loses an electron

In conclusion, using the characteristics of the reactivity of the periodic table, we can answer the different questions..

      1) Metals on the right have more protons, causing valence electrons to be held more strongly.

      2) They are very nonreactive.

      3) Na and Br

      4) Rb loses an electron

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The whole Patterns of Reactivity Quick Check for Honors Chemistry is

1) B. Metals on the right have more protons, causing valence electrons to be held more strongly.

2) B. by gaining electrons

3) B. They are very nonreactive

4) A. Cs and Br

5) A. Rb loses an electron

When a molecule loses or gains an electron it becomes an ion.

"If it gains a negative electron, it becomes a negative ion. If it loses an electron it becomes a positive ion."

Answer:

the molecule become an iron

Explanation:

have a great day

Answer:

yes

Explanation:

to identify an atom you need to know either it's atomic number or it's proton number

while the neutron is used to determine it's atomic mass

The correct statement is " water molecules absorb energy when water vapor condenses to form clouds".

Condensation, which is the opposite of vaporization, would be the transformation of matter from its gaseous state into its liquid state. The water cycle is the most frequent use of the phrase.

One such illustration is the condensation that accumulates on a chilly cup's exterior or on a car's windows on a cool night. Dew, vapor, clouds, and the fog that see it when you exhale on a chilly day are more characteristics of condensation.

Therefore, the correct answer will be option (D).

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Iron gets converted from Fe2+ to Fe3+ during rusting. Details about rusting can be found below.

Rusting is the deteriorated state of iron or steel as a result of moisture and oxidation.

Rusting is characterized by a reddish-brown color on the surface of the iron.

Rusting is caused by oxidation of iron II (Fe2+) ion into iron III (Fe3+) ion.

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The enthalpy of the reaction is 14 J/mol.

The enthalpy of a reaction (ΔH) is the amount of energy transferred between a system and its surroundings during a chemical reaction at constant pressure, measured in joules per mole (J/mol). This value is important because it can tell us whether a reaction is exothermic or endothermic, as well as give us information about the strength of chemical bonds within the reactants and products.To calculate the enthalpy of a reaction, we need to know the amount of energy released or absorbed (Q) and the number of moles of the compound involved in the reaction (n). We can use the equation:
ΔH = Q/n
Given that 6 moles of a compound produce 84 J of energy, we can calculate the enthalpy of the reaction as follows:
ΔH = Q/n
ΔH = 84 J / 6 mol
ΔH = 14 J/mol
This means that for every mole of the compound involved in the reaction, 14 J of energy is transferred between the system and the surroundings. Since the value is positive, we can conclude that the reaction is endothermic, meaning that it requires an input of energy to occur.It is worth noting that the enthalpy of a reaction can depend on a number of factors, such as temperature, pressure, and the specific conditions under which the reaction occurs. As such, it is important to take these factors into account when calculating or predicting enthalpy values.

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Primary amines can be converted into secondary amines by reaction with haloalkanes. this reaction is difficult to achieve in the lab because of the large number of byproducts. the possible products or byproducts of the reaction is attached below. the correct answer is A, B and C.

The understanding of nucleophilic substitution processes is the key notion in the solution of this issue.

The Sn2 reaction, also known as the bimolecular nucleophilic substitution reaction, is a concerted type of reaction that is followed by the creation of the inverted stereochemical product, which has a trigonal bipyramidal shape.

A nucleophilic substitution reaction entails the elimination of the halogen as a leaving group and the initial attack of a nucleophile to the alkyl halide's carbon's sigma square antibonding orbital, which effectively attaches the nucleophile to that carbon.

Attack of the nitrogen lone pair of substituted ammonia on the halogen alkane's carbon-halogen bond. The initial attack is seen below.

The secondary amine is created when the substituted ammonia, acting as a base, attacks the alky ammonium halide salt. Below is an illustration of substituted ammonia's attack.

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The number of moles of NaF that will be produced from 3moles of Na is 3 moles.

Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

According to this question, sodium reacts with fluorine as follows:

2Na+ F₂ → 2NaF

Based on the above equation, 2 moles of Na will produce 2 moles of NaF

This means that 3 moles of Na will produce 3 moles of NaF.

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The molecular shape of ammonia, NH3 is pyramidal. among the given choices.

The molecular shape of ammonia, NH3, is pyramidal. The central nitrogen atom has three outer atoms bonded to it, which creates a trigonal pyramidal shape. The lone pair of electrons on the nitrogen atom pushes the bonded electron pairs closer together, creating a distorted tetrahedral shape. This distortion causes the nitrogen-hydrogen bonds to bend slightly, resulting in a pyramidal shape. The geometry of the molecule plays a role in its properties, such as its polarity and reactivity.

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The hydrocarbon undergoes combustion, it reacts with oxygen to produce carbon dioxide and water. The balanced chemical equation for the complete combustion of cyclohexane (C6H12) can be written as C6H12 + 9O2 → 6CO2 + 6H2O.

This equation shows that for every molecule of cyclohexane that is combusted, 9 molecules of oxygen gas (O2) are required. The products of the reaction are 6 molecules of carbon dioxide (CO2) and 6 molecules of water (H2O). The heat of combustion of cyclohexane, as you mentioned, is 936.8 kcal/mol. This means that when one mole of cyclohexane is completely combusted, it releases 936.8 kilocalories of energy. This energy is typically released as heat, which is why hydrocarbons are important in fuels - they can be burned to produce heat, which can then be used to power engines, generate electricity, or provide heat for buildings.

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A solvus line separates the phase fields of alpha and alpha + beta in a phase diagram. It also separates the phase fields of liquid and liquid + alpha. The solvus line represents a boundary where a solid solution (alpha) separates into two phases, namely alpha and alpha + beta or liquid and liquid + alpha.

In a phase diagram, the solvus line represents the boundary between two phase fields. When it comes to the alpha and alpha + beta phases, the solvus line separates the regions where the material exists in a single-phase (alpha) and where it coexists in a two-phase mixture of alpha and beta. This line represents the temperature and composition conditions at which the transformation from a single phase to a two-phase mixture occurs.

Similarly, the solvus line also separates the phase fields of liquid and liquid + alpha. It denotes the conditions where a liquid phase separates into a two-phase mixture of liquid and alpha. This line represents the temperature and composition conditions at which the liquid phase begins to undergo a phase separation.

In both cases, the solvus line signifies the boundaries between single-phase regions and two-phase regions in the phase diagram.

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Explanation:

9/4 Be +2 (the 9 and 4 are stacked next to Be). Atomic #: 4

Mass #: 9, # protons: 4, # neutrons: 5, #electrons: 2.

31/15 P (31 is stacked over 15 next to the P). Atomic #: 15,

Mass #: 31, # protons: 15, # neutrons: 16, # electrons: 15.