Please select the word from the list that best fits the definition
Represents a range of responses to a question:
Caption
Legend/Key
Scale

Answer:

So if we need to react with 88 gm. of copper 2 then at least 3-4 liters.

Explanation:

Answer:

What leads to the formation of a wind chill factor? A change in the air temperature creates air pressure differences in the atmosphere

Explanation:

hope this helps :)

Answer:

A) type of food.

Answer:

B. Measures of central tendency

Explanation:

Mean, median and mode are best described as measures of central tendency of a given data set.

Mean is the average of the samples given

Mode is the data point with the most frequent occurrence

Median is the data point that lies in the middle

Job/Situation 1: Chemical laboratory technician, where the importance is ,in a chemical laboratory, precise measurement of chemicals and substances is crucial for conducting experiments, formulating accurate solutions, and bad things are are not accurate or balanced in a chemical laboratory. Another is financial analyst,they deal with managing financial data, analyzing investments, bad thing is inaccuracy. Another is Chef where the cooking skill must be good. Risk is fire etc.

As a chef bad thing is ,it can lead to improperly seasoned dishes, inconsistent flavors, undercooked or overcooked food, and dissatisfied customers. It can harm the reputation of the restaurant, lead to negative reviews, and impact customer satisfaction and loyalty. , misinformed investment decisions, and financial losses are the bad of financial analyst etc.

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Explanation:

In chemistry, a mole is the base unit of the amount of substance in a system containing elementary entities (atoms, molecules, ions, electrons), and one mole of substance corresponds to the Avogadro's constant or \(6.023 \ \times \ 10^{23}\)  entities. The stoichiometry equation that relates the amount of substance into the measurement in moles is

                                                           \(n \ = \ \displaystyle\frac{\alpha}{N_{A}}\),

where \(n\) is the number of moles, \(\alpha\) is the amount of substance and \(N_{A}\) is the Avogadro's constant.

Therefore,

                                           \(n \ = \ \displaystyle\frac{7.00 \ \times \ 10^{24} \ \text{atoms}}{6.023 \ \times \ 10^{23} \ \text{atoms mol}^{-1}} \\ \\ n \ = \ 11.624 \ \text{mol}\).

Answer:

Leeunwenhoek

Explanation:

Anton Von Leeunwenhoek was the first scientist to observe live cells and in greater details. He described spirogyra in the mid 15th century.

Answer:

Yesssssss , option two is the correct one click it buddy

Explanation:

Answer:

pH = 4.42

Explanation:

HN3, a weak acid reacts with NaOH as follows:

HN3 + NaOH  → H2O + NaN3

Where 1mol HN3 reacts with 1mol NaOH

After the reaction of only a part of HN3, you will have in solution HN3 (Weak acid) and NaN3 (Conjugate base). This mixture produce a buffer that follows H-H equation:

pH = pKa + log [Conjugate base] / [Weak acid)

Where pH is the pH of the buffer

The hydrazoic acid is a weak acid with pKa = 4.6

And [] could be taken as the moles of each species

After the reaction, the moles of NaOH added = Moles NaN3 produced

And moles HN3 = Initial moles HN3 - Moles NaOH

Moles NaOH = Moles NaN3:

5x10⁻³L * (0.200mol / L) = 1x10⁻³ mol NaN3

Initial moles HN3:

0.025L * (0.100mol / L) = 2.5x10⁻³ moles HN3

final moles: 2.5x10⁻³ moles HN3 - 1x10⁻³ mol = 1.5x10⁻³ moles HN3

Replacing in H-H equation is:

pH = 4.6 + log [1x10⁻³ mol NaN3] / [1.5x10⁻³ moles HN3]

Vanadium(II) sulfate

Vanadium(III) sulfate is the inorganic compound with the formula V2(SO4)3

The general method/rule/formula for calculating where a ball will land depends on various factors such as the initial velocity, angle of projection, air resistance, and gravity.

In general, the most common method to calculate the landing position of a projectile is to use the kinematic equations of motion, which relate the position, velocity, and acceleration of an object. These equations can be used to determine the time it takes for the ball to hit the ground and the horizontal distance it travels during that time.

However, the calculation can become more complex when considering factors like air resistance and varying conditions, and may require more advanced mathematical models.

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The theoretical yield of NH₃ produced under the given conditions is 11.75 g.

The balanced equation for the reaction between hydrogen (H₂) and nitrogen (N₂) to form ammonia (NH₃) is;

N₂ + 3H₂ → 2NH₃

To determine the theoretical yield of NH₃ produced from the given amounts of H₂ and N₂, we need to calculate the limiting reactant and then use stoichiometry to find the maximum amount of NH₃ which can be produced.

The molar masses of H₂, N₂, as well as NH₃ are;

H₂; 2.02 g/mol

N₂; 28.02 g/mol

NH₃; 17.03 g/mol

The number of the moles of each reactant will be calculated as;

moles of H₂ = mass of H₂ / molar mass of H₂ = 1.40 g / 2.02 g/mol = 0.693 mol

moles of N₂ = mass of N₂ / molar mass of N₂ = 9.66 g / 28.02 g/mol = 0.345 mol

To determine the limiting reactant, we need to compare the mole ratios of H₂ and N₂ in the balanced equation with the actual mole ratios of the reactants. The balanced equation shows that 1 mole of N₂ will reacts with 3 moles of H₂ to produce a 2 moles of NH₃. The actual mole ratio of N₂ to H₂ in the reaction mixture is;

moles of N₂ / moles of H₂ = 0.345 mol / 0.693 mol

= 0.498

This ratio is less than the required ratio of 1/3, which means that N₂ is the limiting reactant. This means that all the N₂ will be consumed in the reaction and the amount of NH₃ produced will depend on the amount of N₂ present.

Using the mole ratio from the balanced equation, we can calculate the theoretical yield of NH₃ that can be produced from the 0.345 mol of N₂;

moles of NH₃ = (0.345 mol N₂) × (2 mol NH3 / 1 mol N₂)

= 0.690 mol NH₃

The mass of this amount of NH₃ can be calculated as;

mass of NH₃ = moles of NH₃ × molar mass of NH₃ = 0.690 mol × 17.03 g/mol = 11.75 g

Therefore, the theoretical yield is 11.75 g.

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Answer:

What's the gas given in the question??

Thermal energy transfers between the objects until an equilibrium temperature is reached.

Thermal energy transfer is the process by which heat transmitted from one body to another body, usually from a hotter body to the colder body.

Heat transfer process can occur in three different ways, and they include;

Heat transfer by conduction involves the actual movement of molecules from a hotter region to a colder region.

Heat transfer by radiation occurs through a space, from a hotter source to a colder region.

Heat transfer by convection occurs in a fluid, by the rising of hot molecules and sinking of the colder molecules.

Based on the law of conservation of energy, the heat transferred from a hotter body to a colder body will continue until both bodies reaches a state known as thermal equilibrium.

Thus, in thermal equilibrium, the final temperature of both bodies will be the same.

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Bohr model of oxygen relates to the electron-dot structure of oxygen as

in electron dot structure an atom must have 8 electrons in it's surrounding and oxygen also has 8 electrons in total.

What Is Bohr's model of an atom?

The postulates of Bohr's Model of an atom are-

(1) Electrons revolve around the nucleus in a certain definite path called orbit or stationary state of shell.

(2) The shells are having different energy levels denoted as K, L, M, N ...

(3) As long as the electron remains in an orbit, they neither absorb nor emit energy.

(4) The electron can move only in that orbit in which angular momentum is quantized, i.e., the angular momentum of the electron is an integral multiple of h/2π .

Therefore, Bohr model of oxygen relates to the electron-dot structure of oxygen as in electron dot structure an atom must have 8 electrons in it's surrounding and oxygen also has 8 electrons in total.

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Answer:

6 mol H₂O

General Formulas and Concepts:

Chemistry

Explanation:

Step 1: Define

RxN:     2H₂ + O₂ → 2H₂O

Given:   3 moles O₂

Step 2: Stoichiometry

\(3 \ mol \ O_2(\frac{2 \ mol \ H_2O}{1 \ mol \ O_2} )\) = 6 mol H₂O

Step 3: Check

We are given 1 sig fig.

Our final answer has 1 sig fig, so no need to round.

Answer:The states of matter are the physical forms of matter, which include solid, liquid and gas. The Change of Matter is the change of a substance from one physical state another.

Explanation: Hope it helps guys :)

The states of matter are the physical forms of matter. Change of state refers to the chemical or physical changes which change the state of the substance.

Matter in chemistry, is defined as any kind of substance that has mass and occupies space that means it has volume .Matter is composed up of atoms which may or not be of same type.

Atoms are further made up of sub atomic particles which are the protons ,neutrons and the electrons .The matter can exist in various states such as solids, liquids and gases depending on the conditions of temperature and pressure.

The states of matter are inter convertible into each other by changing the parameters of temperature and pressure.Matter can be conserved according to law of conservation of matter.

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Answer:

density

Explanation:

Density is an important measurement. It has an unit: g/mL or kg/L, ...

Evaporation, freezing, melting are the processes in which the substances change their states. Other processes are: condensation, sublimation, deposition.

...

Hope this answer can help you. Have a nice day!

The term "molar volume" (Vm) of an ideal gas refers to this amount. (STP) as 293 kelvin (K) of temperature and 1 atmosphere of pressure (P = 1 atm, which is also equal to 760 torr). Any ideal gas has a 22.4 L molar volume at STP.

The volume occupied through one mole of the a chemical element or chemical compound at a standard temperature and pressure (STP) is known as the molar volume (Vm). By dividing the mass density () by the molar mass (M), it can be computed.

One mole of any gas has the same volume when it is present at the same temperature and pressure. The volume that one mole of any gas occupies at standard pressure and temperature is known as the molar volume. 24 dm3 is equivalent to the molar volume (24,000 cm 3). In cases where it is necessary, this volume is provided.

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Answer: The concentration of \(CH_3NC\) will be \(1.56\times 10^{-2}M\) after 416 seconds have passed.

Explanation:

Expression for rate law for first order kinetics is given by:

\(t=\frac{2.303}{k}\log\frac{a}{a-x}\)

where,

k = rate constant = \(3.00\times 10^{-3}s^{-1}\)

t = age of sample = ?

a = let initial amount of the reactant = \(5.45\times 10^{-2}M\)

a - x = amount left after decay process = \(1.56\times 10^{-2}M\)

\(t=\frac{2.303}{3.00\times 10^{-3}}\log\frac{5.45\times 10^{-2}}{1.56\times 10^{-2}}\)

\(t=416s\)

The concentration of \(CH_3NC\) will be \(1.56\times 10^{-2}M\) after 416 seconds have passed.

Answer:

a. 2..86 b. 4.86 c. 10.7 d. 8.7

Explanation:

a. Determine a pH at which 50% of ClCH2COOH will be in a form that possesses a charge.

Using the Henderson-Hasselbalch equation,

pH = pKa + log[A⁻]/[HA]

where [A⁻] = concentration of conjugate base (or charged form) and [HA] = concentration of acid.

At 50% concentration, [A⁻] = [HA] ⇒ [A⁻]/[HA] = 1

So, pH = pKa + log[A⁻]/[HA]

pH = pKa + log1

pH = pKa = 2.86

b. Determine a pH at which pH more than 99% of ClCH2COOH will be in a form that possesses a charge.

Let x be the concentration of the acid. Since 99% of it should possess a charge, the basic concentration is 0.99x while the acidic concentration is remaining 1 % (1 - 0.99)x = 0.01x

Using the Henderson-Hasselbalch equation,

pH = pKa + log[A⁻]/[HA] where [A⁻] = concentration of conjugate base (or charged form) = 0.99x and [HA] = concentration of acid = 0.01x.

pH = pKa + log0.99x/0.01x

pH = pKa + log0.99/0.01

pH = 2.86 + log99

pH = 2.86 + 1.996

pH = 4.856

pH ≅ 4.86

c. Determine a pH at which 50% of CH3CH2NH+3 will be in a form that possesses a charge.

Using the Henderson-Hasselbalch equation,

pH = pKa + log[A⁻]/[HA]

where [A⁻] = concentration of conjugate base and [HA] = concentration of acid.

At 50% concentration, [A⁻] = [HA] ⇒ [A⁻]/[HA] = 1

So, pH = pKa + log[A⁻]/[HA]

pH = pKa + log1

pH = pKa = 10.7

d. Determine a pH at which pH more than 99% of CH3CH2NH+3 will be in a form that possesses a charge.

Let x be the concentration of the acid. Since 99% of it should possess a charge, the basic concentration is 0.01x while the acidic concentration is remaining 99 % (1 - 0.01)x = 0.99x (which possesses the charge).

Using the Henderson-Hasselbalch equation,

pH = pKa + log[A⁻]/[HA] where [A⁻] = concentration of conjugate base = 0.01x and [HA] = concentration of acid = 0.99x.

pH = pKa + log0.01x/0.99x

pH = pKa + log1/99

pH = 10.7 - log99

pH = 10.7 - 1.996

pH = 8.704

pH ≅ 8.7

Answer:2,4-dichlorohexane

Explanation:

Hope it helps

Answer:

As altitude increases, the amount of gas molecules in the air decreases the air becomes less dense than air nearer to sea level.

Explanation:

Answer:

b

Explanation:

The correct answer would be requiring individuals to complete specific types of work.

A question of how to produce deals with the processes of production itself. There are several small processes that eventually aggregate together to lead to the production of goods or services. Some of these small processes will definitely require that individuals within the production unit complete specific types of work.

The option of growing corn instead of potatoes and producing more capital goods and fewer consumer products address what to produce while the option of selling natural resources to other countries has to do with for whom to produce.

Correct option: b

Answer:

C. aquifer

Explanation:

I just did a lesson on this

:)

Answer:

so so

Explanation:

this your question?? <_>

The element that has chemical properties most similar to sodium is d. rubidium.

What is rubidium?

Rubidium is in the same group (group 1) as sodium in the periodic table and has similar chemical properties, such as reactivity with water and the tendency to form ionic compounds with halogens. Magnesium, oxygen, and phosphorus are not in the same group as sodium and have different chemical properties.

What is periodic table?

The periodic table is a tabular display of all known chemical elements, arranged according to their atomic structure and properties. It is arranged in rows and columns, with elements placed in order of increasing atomic number, which is the number of protons in an atom's nucleus. The periodic table is a powerful tool for predicting the chemical behavior of elements and for understanding the relationships between different elements. It is used extensively in chemistry, physics, and other sciences to help understand the properties and behavior of different elements, and to guide research and development in many different fields.

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Answer:

1. Multimeter

2. Cathode

3. Capacitor

4.  Selector switch

5. Short or Shorted

6. Resistors

7. Resistor color coding

8. Open Capacitor

9. Step-up transformer

10. Step-down transformer

Explanation:

The above-described elements are electronic components. Resistors for instance are designed to resist the flow of electric current. They are also standardized such that a deviation from the set resistance level will indicate a problem. The capacitor is another electrical component that stores energy as an electrical charge. Knowledge of these electrical components and the ways they are tested will make a person proficient in electrical electronics.