What is the mass of a 7.426-mole sample of sodium hydroxide (NaOH molar mass = 40.0 g/mol)?
Select one:
5.360 g
40.00 g
179.1g
297.0 g

Based on consumption of fossil fuels today, It can be predicted Fossil Fuels will eventually be used up and a new energy developed to supply energy needs of the world.

Fossil fuels are made from decomposing plants and animals.

These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy.

Coal, oil, and natural gas are examples of fossil fuels.

Above given fossil fuels are expected to be used up and a new energy developed to supply energy needs of the world.

Therefore, Based on consumption of fossil fuels today, It can be predicted Fossil Fuels will eventually be used up and a new energy developed to supply energy needs of the world.

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Answer:

0.5

Explanation:

5/10=0.5

Answer:

B. Mixing a few teaspoons of salt into the water

Explanation:

Pure water doesn't contain any ions, therefore it cannot conduct electricity. Adding salt (NaCl) to the water causes the salt to ionize into Na⁺ and Cl⁻ ions, and the movement of the ions completes the circuit, causing the bulb to glow.

Explanation:

The definition of a god is an image, person or thing that is worshiped, honored or believed to be all-powerful or the creator and ruler of the universe. An example of a god is Ganesha, a Hindu diety.

Answer:

11.8.4 Distillation Columns

Distillation columns present a hazard in that they contain large inventories of flammable boiling liquid, usually under pressure. There are a number of situations which may lead to loss of containment of this liquid.

The conditions of operation of the equipment associated with the distillation column, particularly the reboiler and bottoms pump, are severe, so that failure is more probable.

The reduction of hazard in distillation columns by the limitation of inventory has been discussed above. A distillation column has a large input of heat at the reboiler and a large output at the condenser. If cooling at the condenser is lost, the column may suffer overpressure. It is necessary to protect against this by higher pressure design, relief valves, or HIPS. On the other hand, loss of steam at the reboiler can cause underpressure in the column. On columns operating at or near atmospheric pressure, full vacuum design, vacuum breakers, or inert gas injection is needed for protection. Deposition of flammable materials on packing surfaces has led to many fires on opening of distillation column for maintenance.

Another hazard is overpressure due to heat radiation from fire. Again pressure relief devices are required to provide protection.

The protection of distillation columns is one of the topics treated in detail in codes for pressure relief such as APIRP 521. Likewise, it is one of the principal applications of trip systems.

Another quite different hazard in a distillation column is the ingress of water. The rapid expansion of the water as it flashes to steam can create very damaging overpressures.

Answer:

Explanation:

Using Intersecting Chords Theorem,

AB × CB = BE × BD

Answer:

It has protons, neutrons and electrons

Answer:

A

Explanation:

The answer to this question is A. Both ripening and spoiling are chemical reactions.

Spoiling is a chemical reaction because spoiled food has bad smell and taste and it changes colour too.

Ripening of fruits is a chemical change. For example the colour could change as well as the texture.

Answer:

option a) chemical reaction, chemical reaction.

Explanation:

Changes in which new substances with different properties are formed are called chemical changes. Cooking of food, burning of substances are chemical changes as entirely new substances are formed. Burning of a candle wax releases carbon dioxide and water vapour (new substances). in here ripening and spoiling is a change that cannot be reversed which makes it a chemical change.

3531.23 J is the energy used to heat tin when 229.2 g of tin was heated from 46.3 to 115.7°C.

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases by 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

Q=mcΔT

Give data:

m=229.2 g

c=0.222 J/g x °C

ΔT=115.7°C - 46.3°C

ΔT= 69.4 °C

Putting value in the equation:

Q=mcΔT

Q=229.2 g x 0.222 J/g°C x 69.4 °C

Q= 3531.23 J

Hence, 3531.23 J is the energy used to heat tin.

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The process of  embryonic development is the process by which the fetus of an organism is developed.

The process of  embryonic development is the process by which the fetus of an organism is developed.

We know that all vertebrates are the same at the embryonic stage as shown in the image. Hence the following statements are true;

Missing parts

Based on these images, what can you conclude about the organisms?

1)They’re a mixture of vertebrates and invertebrates.

2)They have similarities in their embryonic stages that don’t exist in their adult forms.

3)They all undergo metamorphosis.

4)They all contain a backbone, or spinal column.

5)They’re the same species of organism.

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When the potato is put into the distilled water, it will absorb the water. The water is trying to dilute the salt inside the potato.

What is the meaning of concentrated?

The concentration of a solution is a measure of the amount of solute that has been dissolved in a given amount of solvent or solution.

When the potato is put into the distilled water, it will absorb the water. The water is trying to dilute the salt inside the potato.

Since potatoes already contain sugar, less water will diffuse out of the potato placed in sugar water. The slice placed in water will be rigid since it will absorb water.

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Barium can form ions with a +2 charge and it is called a cation.

Ex:- Ba(s)+2HCl(aq)→BaCl2(aq)+H2(g)

In this redox reaction,

initially, barium shows 0 (s) oxidation no. and after forming the product its oxidation no. changes to +2 (in aq).

When a metal loses electrons and a nonmetal gets those electrons, cations (positively charged ions) and anions (negatively charged ions) are created.

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Density Of A Nickel:-

8.902 (25°C)

Explanation of why does nickel have a high density:-

Nickel is the only element named after the devil. The name comes from the German word Kupfernickel, meaning "Old Nick's copper," a term used by German miners. They tried to remove copper from an ore that looked like copper ore, but they were unsuccessful. ... Nickel is also used in the manufacture of many other alloys.

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The 3 common gases that give off reactions are Hydrogen sulfide, Carbon monoxide, Nitrogen oxides.

Off reactions are defined as chemical reactions that occurs when something burns or during combustion of materials which gives off energy.

Some gases that give off reaction are:

Note that these gases are mostly poisonous.

Therefore, the 3 common gases that give off reactions are Hydrogen sulfide, Carbon monoxide, Nitrogen oxides.

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Answer:

answer will be b

Explanation:

mole is given 0.20

you have to find mass so just convert it into mass

remember if you move away from mole you multiply and if you move towards mole you divide so

just multiply mole with molar mass of glucose

so

0.20×180 = 36 grams

simple keep learning.......

Answer: It will expand to fill the room.

Explanation:

Gases will expand or compact to fill the available space.

The volume of the solution in mL needed to deliver 0.078 moles of glucose to the patient is 250mL.

The volume of a solution can be calculated by using the following formula:

Molarity = n/V

Where;

According to this question, an intravenous solution is noted as having a concentration of glucose equal to 0.312 M. The volume that will be needed is as follows:

volume = 0.078 moles ÷ 0.312M

volume = 0.25L = 250mL

Therefore, the volume of the solution in mL needed to deliver 0.078 moles of glucose to the patient is 250mL.

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Answer:

4560 torr

Explanation:

PV = K

4 x 1.5 = k

k = 6

V = k / p

V = 6 / 1

V = 6

atm to torr = 1 to 760

760 x 6 = 4560

Answer:

4560 Torr

Explanation:

Boyle's Law

[tex]\sf P_1 \cdot V_1=P_2 \cdot V_2[/tex]

where:

Given:

Substituting the given values into the formula:

[tex]\implies \sf 1.5 \cdot 4=P_2 \cdot 1[/tex]

[tex]\implies \sf P_2=6\:atm[/tex]

To convert atm to Torr, multiply atm by 760:

[tex]\implies \sf P_2=6\cdot 760=4560\:Torr[/tex]

The relation between the speed of impact and the dropping height is

[tex]\rm h =\dfrac{1}{2g}v^2[/tex]

It is defined as the speed of an object when it falls from a height  and makes an impact with the ground or any other object.

As the object is falling from the height , its velocity will be continuously changing

Assuming it has no initial velocity , u = 0

let the final velocity is  [tex]\rm v_f[/tex] = [tex]\rm \sqrt {2gh}[/tex]

the potential energy at the height  h as  mgh

the kinetic energy when it reaches the bottom as  [tex]\rm \dfrac{1}{2}mv^2[/tex]

As the energy is always conserved

 [tex]\rm mgh = \dfrac{1}{2}mv^2[/tex]

[tex]\rm h =\dfrac{1}{2g}v^2[/tex]

This is the relation between the speed of impact and the dropping height.

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A(n) Business Unit is a dynamic sub-organization that can be created and eliminated depending on need.

Business unit is when the company wants its sales in a segmented way. This market offer, or it can be, for example, business area, segment line, market performance cases.

This strategy consists of the form adopted by many companies that divide their activities into independent business units, with different results, strategies and managers.

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Answer:

187 moles NH₃

Explanation:

To find the amount of ammonia formed, you need to multiply the given value by the mole-to-mole ratio consisting of both relevant molecules. The mole-to-mole ratio is made up of the molecules' coefficients in the balanced equation. The desired unit should be placed in the numerator of the ratio. The final answer should have 3 sig figs to reflect the lowest amount of sig figs among the given values.

1 N₂ + 3 H₂ ----> 2 NH₃
^                         ^

93.5 moles N₂          2 moles NH₃
----------------------  x  -------------------------  =  187 moles NH₃
                                    1 mole N₂

Answer:

C=8,H=8 and O =3

Explanation:

As the formula is given.

The number of moles of hydrogen atoms contained in 1 mole of c6h12 is 12.

Hydrogen can be produced from various domestic resources such as fossil fuels, biomass, and the electrolysis of water by electricity. The environmental sustainability and energy efficiency of hydrogen depends on how hydrogen is produced.

Hydrogen is the simplest element. Each hydrogen atom has only one proton. Hydrogen is also the most abundant element in the universe. Stars like the Sun are mainly made of hydrogen. The sun is essentially a giant sphere of hydrogen and helium gas.

Some facts about hydrogen:

Fuel cell vehicles are very similar to traditional gasoline vehicles

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