Which of the following would increase the intensity of the tornado?



a. decrease in wind speed

b. decrease in condensation

c. increased rate of evaporation

d. increase of cold air

Answer:

C Q, R and S only.

Thermometer: for measuring temperature.

Measuring cylinder: for measuring accurate volume used in standardization during determination of concentration.

dock: for holding solutions

Answer:

Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.

Explanation:

Answer:

Photosynthesis is the process in which light energy

Explanation:

the answer would be B

the particles wouldnt break, nor would the form new particles or just disappear

Answer:

No. of molecules= mass/molar mass ×avogadro no.

                         =  13.2/50×6.02×10°23

  No. of molecules =1.59×10°23

Explanation:

Answer:

I believe it is 42.3 billion years old

Explanation:

Answer:

H2O2

Explanation:

I know it's been awhile since the question was asked but for future people like me its H2O2 I got it right in the quiz.

The whole-number multiple is obtained by dividing its molar mass (34.02 g/mol) by the empirical formula mass. H₂O₂ is the molecular formula of a compound that is composed of 94.1% O and 5.9% H with a molar mass of 34g.

The mass of a sample of a chemical compound divided by the quantity, or number of moles in the sample, measured in moles, is known as the molar mass of that compound. The molar mass of a material is a bulk attribute rather than a molecular one.

The mass of 6.022 × 10²³ atoms, molecules, or formula units of a material are equal to its molar mass, which is the mass of 1 mole of that substance represented in grams per mole.

Molar mass is a crucial factor to consider while planning an experiment. The molar mass enables you to calculate the quantity you should weigh out on your scale when testing theories that call for specified amounts of a material.

Thus, H₂O₂ is the molecular formula of a compound that is composed of 94.1% O and 5.9% H with a molar mass of 34g.

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Answer:

Ca2+ is larger than Mg2+

Explanation:

Mg2+ has total 10 electrons and Ca2+ has total 18 electrons. So, Ca2+ will have more no of subshell which means greater particle size.

Answer:

From the periodic table, Atomic number of fluorine is 7 and atomic mass is 19

Answer:

Option D

Oxygen particles mix evenly with hydrogen particles.

Explanation:

Diffusion refers to the movement of gasses from a region of higher concentration to a region of lower concentration.

Diffusion occurs in gases because their particles are in a state of constant random motion.

Due to this continuous random motion, once the oxygen and the hydrogen are added to the container, they will begin to mix freely with each other until they fill up the entire volume of the container.

Answer: The atom has three components the electrons, neutrons and protons.

Explanation:

J.J Thomson is responsible for the discovery of electron. He discovered the electrons while determining the properties of cathode rays in 1897. Rutherford is responsible for the discovery of proton during 1909 while performing the gold foil experiment. W. Bothe and H. Becker is credited to the discovery of neutrons.                          

The average speed

3. 89.7 m/min

4. 6.13 ft/min

Given

3. 1076 m in 12 min

4. 92 ft in 15 min

Required

average speed

Solution

3.

I am solving for : the average speed

The equation I need is :

[tex]\tt avg~speed=\dfrac{total~distance}{total~time}[/tex]

This is how I set the equation

[tex]\tt avg~speed=\dfrac{1076~m}{12~min}[/tex]

This is my answer = 89.7 m/min

4.

I am solving for : the average speed

The equation I need is :

[tex]\tt avg~speed=\dfrac{total~distance}{total~time}[/tex]

This is how I set the equation

[tex]\tt avg~speed=\dfrac{92~ft}{15~min}[/tex]

This is my answer = 6.13 ft/min

Answer:

A wave passes from a solid to a liquid while remaining the same temperature.

The medium increases in temperature while remaining in the same phase.

The medium decreases in temperature while remaining in the same phase.

A wave passes from a liquid to a gas while remaining the same temperature.

AND less electric charge would flow in the circuit

The voltage is decreased

Explanation:

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Changing the battery in a circuit from 9 volts to 1.5 volts would most likely result in less electric charge flowing in the circuit.

According ohms law, the electric voltage is the product of current and resistance in the circuit. A lower voltage battery will have less electric potential energy available to move the charges, resulting in a lower electric current flow in the circuit.

The resistance in the circuit would not necessarily increase or decrease due to the change in the battery voltage. Resistance is a property of the components in the circuit, such as resistors, wires, and other devices that can impede the flow of current.

However, if the resistance of the circuit remains the same and the battery voltage decreases, the resulting electric current flow would also decrease according to Ohm's law (I = V/R), where I is the current, V is the voltage, and R is the resistance.

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The mass of iron that remained at the end of the experiment : 6.65 g

Given

V HCl gas = 300 cm³

mass Fe = 7 g(Ar Fe = 56 g/mol)

Reaction

Fe(s) + 2HCl(g) → FeCl2(s) + H2(g)

Required

The mass of iron remained

Solution

molar volume for 1 mol gas = 24000 cm³=24 L, so mol HCl :

[tex]\tt \dfrac{300}{24000}=0.0125~mole[/tex]

mol ratio Fe : HCl from equation : 1 : 2, so mol Fe =

[tex]\tt \dfrac{1}{2}\times 0.0125=0.00625[/tex]

mass of Iron(reacted) :

[tex]\tt 0.00625\times 56=0.35~g[/tex]

Mass remained

7 g - 0.35 = 6.65 g

Answer:

B) Percent yield = 56%

Explanation:

Given data:

Mass of potassium iodide = 23 g

Mass of lead iodide formed = 18 g

Percent yield = ?

Solution:

Chemical equation:

2KI + Pb(NO₃)₂    →     2KNO₃ + PbI₂

Number of moles of potassium iodide:

Number of moles = mass / molar mass

Number of moles = 23 g/ 166 g/mol

Number of moles = 0.14 mol

Now we will compare the moles of PbI₂ and KI:

                      KI          :           PbI₂        

                      2           :             1

                      0.14      :          1/2×0.14 = 0.07        

Theoretical yield of PbI₂:

Mass = number of moles × molar mass

Mass = 0.07 × 461 g/mol

Mass =  32.27 g

Percent yield:

Percent yield = actual yield / theoretical yield × 100

Percent yield = 18 g/ 32.27 g × 100

Percent yield = 56%

Answer:

Synthesis

Explanation:

A+B=C

Answer: The answer is C- comets!                                                                            

Explanation:  Callisto is composed mainly of rock and water ice, although other ices like ammonia ice and carbon dioxide ice may be present. Water ice occurs at the surface of Callisto so it would be comets.

Explanation:

When liquid isopropanol (C3H8O) burns in oxygen gas, carbon dioxide gas and liquid water are produced. When dissolved sodium hydroxide reacts with sulfuric acid, aqueous sodium sulfate and water are formed.

Answer:

When atoms lose or gain electrons, they become positively or negatively charged ions. In an ionic compound, the ions are arranged in a three-dimensional structure called a crystal. ... When an atoms gains or loses electrons, it gains a charge, thus becoming an ion.

Explanation:

Answer:

The iron ore deposits began forming when the first organisms capable of photosynthesis began releasing oxygen into the waters.

Explanation:

Answer:

The compound you are asking for is not complete. But I will give you the answer to one of the compounds.

The complete compound is:

2-bromo, 3-chloro-4,4-dimethylpentane.

Attached is the structure of the compound.

Explanation:

2-bromo, 3-chloro-4,4-dimethylpentane is an organic compound. It's molecular formula is C₇H₁₄BrCl.

This compound has bromine and chlorine attached to the backbone carbon of the pentane compound. The bromine and chlorine are attached to the second and third backbone carbon of the compound respectively.

Also, the dimethyl means that the compound has two methyl (CH₃) attached to the same carbon which is the number 4 backbone carbon.

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Answer:

When the number of electrons does not equal the number of protons, the atom is ionized.

Answer:

False.

Explanation:

Answer:

1.301 × 10⁻¹² m

Explanation:

Step 1: Given and required data

Step 2: Calculate the wavelength (λ) of the electromagnetic wave

We can calculate the wavelength of the electromagnetic wave using the Planck-Einstein's relation.

E = h × c / λ

λ = h × c / E

λ = (6.626 × 10⁻³⁴ J . s) × (3.00 × 10⁸ m/s) / 1.528 × 10⁻¹³ J

λ = 1.301 × 10⁻¹² m

The wavelength of this wave is equal to: D. [tex]1.301 \times 10^{-12}\;meter[/tex]

Given the following data:

To determine the wavelength of this wave, we would apply Einstein's equation for photon energy:

Mathematically, Einstein's equation for photon energy is given by the formula:

[tex]E=\frac{hc}{\lambda}[/tex]

Where:

Making [tex]\lambda[/tex] the subject of formula, we have:

[tex]\lambda = \frac{hc}{E}[/tex]

Substituting the given parameters into the formula, we have;

[tex]\lambda = \frac{6.626 \times 10^{-34}\; \times \;3.0 \times 10^{8}}{1.528 \times 10^{-13} }\\\\\lambda = \frac{1.99 \times 10^{-25}}{1.528 \times 10^{-13} }\\\\\lambda =1.301 \times 10^{-12}\;meter[/tex]

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Answer:

1.28 mol Cu(OH)₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

125 g Cu(OH)₂

Step 2: Identify Conversions

Molar Mass of Cu - 63.55 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of H - 1.01 g/mol

Molar Mass of Cu(OH)₂ - 63.55 + 2(16.00) + 2(1.01) = 97.57 g/mol

Step 3: Convert

[tex]125 \ g \ Cu(OH)_2(\frac{1 \ mol \ Cu(OH)_2}{97.57 \ g \ Cu(OH)_2} )[/tex] = 1.28113 mol Cu(OH)₂

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

1.28113 mol Cu(OH)₂ ≈ 1.28 mol Cu(OH)₂

Answer:

A

Explanation:

The products of a chemical equation is what is being experimented with. However, the results in which you get are known as your solution.

Answer:

I think it will start to have a greenish color and get lighter

Explanation:

Answer:

d

Explanation:

Answer:

They have similar chemical properties.

Explanation:

james madison test

The elements in a group on the periodic table have in common that they all are arranged on the basis of the number of electrons in the outer most shell of the atom.

The periodic table of  elements is defined as in which the classified all the non metals accordance with their properties in such a way that with similar properties are grouped.

Moosley arranged the elements in increasing order of their atomic number and observed that after a certain time of interval elements with same properties are repeated.

Therefore, elements in a group on the periodic table have in common that they all are arranged on the basis of the number of electrons in the outer most shell of the atom.

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Answer:

Volume also reduced to half

Explanation:

Volume and absolute temperature are directly proportional to each others