When this event occurs and blankets animals with poisonous gasses it is called a ___________________ cloud.





Fill in the blank! :)

The frequency of the wave assuming it is light having compete distance as 4.17×10^7 m is 1.44×10^15 Hz

Wavelength:- It is defined as the distance between the two Consecutive Crest or trough. OR distance travelled by the wave to Complete one Complete Cycle.

The distance for completing two cycle is 4.17×10^7 m

so 2λ=4.17×10^7m

λ=2.085×10^-7m

Also f=c/λ

f=3×10^8/2.085×10^-7

f=1.44×10^15 Hz

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The volume of nonadecane that has a density of 0.7860 g/mL is 1573.2mL.

The volume of a substance can be calculated by dividing the mass of the substance by its density. That is;

Volume = mass ÷ density

According to this question, nonadecane has a density of 0.7860 g/mL and has 4.605 moles.

First we calculate the mass of nonadecane as follows:

mass = 4.605 mol × 268.518 g/mol

mass = 1236.53g

Volume = 1236.53g ÷ 0.7860 g/mL = 1573.2mL

Therefore, the volume of nonadecane that has a density of 0.7860 g/mL is 1573.2mL.

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Using simple multiplication, we can conclude that 1.5 is the numerical value of 1.2 × 1.222.

When solving mathematical analysis issues, numerical analysis is the study of methods that employ numerical approximation rather than symbolic manipulation (as distinguished from discrete mathematics). The study of numerical techniques aims to identify approximate rather than precise answers to issues.

Numerous engineering and physical science disciplines, as well as the life and social sciences, as well as commerce, the arts, and even medicine, use numerical analysis.

The use of more complex numerical analysis is now possible thanks to the rise in computing power, which also enables the creation of intricate and accurate mathematical models for use in engineering and science. Ordinary differential equations, which are used in celestial mechanics to forecast the motion of planets, stars, and galaxies, are examples of numerical analysis.

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Answer: F,C,NA

Explanation:

bc it is

The density of the object weighing 15.50 g  when placed inside the water having initial volume 12.5 mL and the final volume 16.0 mL is 4.42 g/mL.

Density is defined as the mass of a substance per unit of its volume. It is denoted by a Greek symbol ρ. Density is the mass of a substance divided by its volume. It is given by -

                                              ρ = m

                                                      v

where,

ρ = density

m = mass

v = volume

Given data :

Mass (m) = 15.50 g

Volume (v) = (Final volume - initial volume)

               v = 16.0 mL - 12.5 mL = 3.5 mL

Putting the values in above formula,

Density = mass  

                volume

Density = 15.50 = 4.42 g/mL

                  3.5

The density of object is found to be 4.42 g/mL

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The mass of sulfur in a sample of CaSO4 with a mass of 65.8 g is 15.50g.

According to this question, a 10.4 g sample of CaSO4 is found to contain 3.06 g of Ca and 4.89 g of O.

This means that the mass of sulfur in the 10.4g of CaSO4 is 10.4g - (3.06g + 4.89g) = 10.4g - 7.95g = 2.45g

Next, we calculate the percent ratio of each element in the compound; CaSO4.

According to this question, a sample of CaSO4 with a mass of 65.8 g is given. The mass of each element in this compound is as follows:

Therefore, the mass of sulfur in a sample of CaSO4 with a mass of 65.8 g is 15.50g.

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Explanation:

Refer to Activity 2 in Lab 3A to answer the question below

Two amino acids are shown below in the process of forming a peptide bond (labeled). The hydroxyl (-OH circled in red) is being removed from the carboxyl group of the first amino acid. A hydrogen

atom (-H circled in red) is being removed from the amine group from the second amino acid. The removed -OH and -H will form water (H20)

Question

What chemical reaction takes place when water is removed to form a bond (as is being shown below)?

Answer:    es no metales

Explanation:

The products of the reaction between acetate ion and hydronium ion are acetic acid and water.The equilibrium lies to the left side of the reaction.

The equilibrium lies to the left side of the reaction as when the concentration of acetate or hydronium ion is increased the reversible reaction is favored leading to the formation of acetic acid  and water.

Factors affecting equilibrium direction are as follows:

1)Change in concentration:When the concentration of any component is altered,equilibrium direction changes to minimize the effect of concentration change.

When the concentration of reactants is increased, reaction proceeds in forward direction and when concentration of products is increased, reaction proceeds in backward direction.

2)Change in temperature:Increase in temperature causes equilibrium to move in direction of endothermic reaction while decrease in temperature  causes equilibrium to move in direction of exothermic reactions.

3)Change in pressure:An increase in pressure causes the reaction to reverse as the number of mole's of gas on reactant's side is decreased.

A decrease in pressure causes the reaction to move forward as the number of moles of gas on product side is reduced.

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The final water reading in the graduated cylinder if the density of copper is 8.96 g/mL is 16.79mL

Density is defined as mass per unit volume. Density and volume have a directly proportional relationship. That is, any change in volume causes a change in density and vice versa.

Find the final water reading in the graduated cylinder

[tex]D=\frac{M}{V}[/tex]

where,

D= density

M= mass

V= volume

volume due to copper pieces

V= M/D

V=12.91g/8.96

 =1.440

find volume = original volume + displaced volume

                    = 15.35 + 1.440

                    = 16.79mL

The final water reading in the graduated cylinder if the density of copper is 8.96 g/mL is 16.79mL

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Taking into account the definition of density, the volume of the quarter is 0.5952 mL.

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space and it is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

In this case, you know that:

Replacing in the definition of density:

10.5 g/mL= 6.25 g÷ volume

Solving:

10.5 g/mL× volume= 6.25 g

volume= 6.25 g÷ 10.5 g/mL

volume= 0.5952 mL

In summary, the volume of the quarter is 0.5952 mL.

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When we convert 120 meter to feet we obtain 393.6 feet.

Unit conversions is very important in science. It is important that we are able to express a value in different units as this is able to ease the process of making calculations.

We know that;

1 meter = 3.28 foot

120 meter = 120 meter * 3.28 foot/1 meter

= 393.6 feet

Thus, when we convert 120 meter to feet we obtain 393.6 feet.

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Answer:

true I believe

Explanation:

According to the law of conservation of mass, the mass of CO₂ formed is 6.15 g.

The mass of  Carbon dioxide, CO₂ is produced from the given reaction between 15.00 g of CaCO3 powder and add it to 60.75 g of HCl solution is determined as follows:

The mass of the calcium carbonate, CaCO₃ reacting = 15.0 g

Mass of HCl solution reacting = 60.75 g

Total mass of reactants = 60.75 g + 15.0 g

Total mass of reactants = 75.75 g

On addition of the calcium carbonate to the HCl solution, bubbles of carbon dioxide gas, CO₂, were observed and the gas allowed to escape.

Equation of the reaction: CaCO₃ (s) + 2 HCl (aq) → CaCl₂ (aq) + H₂O (l) + CO₂ (g)

Mass of resulting solution = 69.60 g

According to the law of conservation of mass, mass of product = mass of reactant

Therefore, mass of CO₂ formed = 75.75 g - 69.60 g

mass of CO₂ formed = 6.15 g

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Intermolecular force is the force of attraction that holds the particles in the atom together. The force referred to in the question is the force that binds the various elements together when they come together.

The intermolecular forces presented in the answer options in order of strength to weakness are ion-dipole hydrogen bonds dipole-dipole and van der Waals forces. The dipole-dipole interaction is the strongest intermolecular attraction. These are the weakest intermolecular forces and exist between all types of molecules, whether ionic or covalent, polar or non-polar.

Solids usually have the strongest intermolecular forces compared to liquids and gases. In solids, they are incompressible and dense because the particles are close together. The weakest intermolecular force is the London dispersion force. London Dispersion Force The London dispersion force is also known as the induced dipole induced dipole because it is a temporary attractive force that generates a temporary dipole. London dispersion exists in nonpolar monatomic gases.

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Answer:

nonpolar substance < polar substance < ionic substance

Explanation:

Answer key

The most important safety measure to follow when using an acid in a classroom laboratory is wearing gloves, wear face shield and protective clothing etc

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Answer:

The conversion factor is 0.001; so 1 cubic decimeter = 0.001 cubic meters. In other words, the value in dm3 divide by 1000 to get a value in m3.

Explanation:

The mass (in dg) of the 24.5 mL of the substance having a specific gravity of 0.841 is 206.045 dg

We'll begin by obtaining the density of substance. This can be obtained as follow:

Density of substance = Specific gravity × density of water

Density of substance = 0.841 × 1

Density of substance = 0.841 g/mL

The mass of the substance can be obtained as illustrated below:

Density = mass / volume

Cross multiply

Mass = Density × Volume

Mass of substance = 0.841 × 24.5

Mass of substance = 20.6045 g

Multiply by 10 to express in dg

Mass of substance = 20.6045 × 10

Mass of substance = 206.045 dg

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The actual yield of iron in moles is 0.2 mole and theoretical yield of iron is 0.8 mole. The percent yield of iron is 25%.

Yield can be defined as a measure of chemical reactions efficiency, as a ratio of mole of product to the mole of reactant.

Percent yield can be calculated as actual yield divided by theoretical yield, multiply by 100.

Molar mass of Fe is 55.84 g/moles

To calculate actual yield = mass/ molar mass

                                         = 11.4/55.84 = 0.2 moles

Theoretical yield = 0.395 x 2 = 0.8 moles

Percent yield % = actual yield/theoretical yield x 100%

                           = 0.2/0.8x100%

                           =  25%

Thus, the actual yield of iron in moles is 0.2 mole and theoretical yield of iron is 0.8 mole. The percent yield of iron is 25%.

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Answer:

statement C is the correct answer

Taking into account the definition of density, the density of the metal is 1.097 g/mL.

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is:

density= mass÷ volume

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know that:

Replacing in the definition of density:

density= 4.5 g÷ 4.1 mL

Solving:

density= 1.097 g/mL

In summary, the density of the metal is 1.097 g/mL.

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Answer:

1 LITHIUM= 6.022140857×1023 atoms

0.50 LITHIUM =  3.01 × 102^3

ADD THEM TOGETHER AND YOU GET YOUR ANSWER.

Explanation:

Answer:

Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The fission process often produces gamma photons, and releases a very large amount of energy even by the energetic standards of radioactive decay

Answer: 20.179 grams

I had to do a project on this recently, so here is your answer!

Hope this is helpful!

Answer:

2.894 x 10²⁴ atoms Ne

Explanation:

To find the amount of neon atoms, you need to (1) convert grams to moles (using the atomic mass) and then (2) convert moles to atoms (using Avogadro's Number). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator of the ratios in this case). The final answer should have 4 sig figs like the given value (100.0 = 4 sig figs).

Atomic Mass (Ne): 20.180 g/mol

Avogadro's Number:

6.022 x 10²³ atoms = 1 mole

 100.0 g Ne             1 mole             6.022 x 10²³ atoms
--------------------  x  -----------------  x  -------------------------------  =  2.894 x 10²⁴ atoms
                               20.180 g                    1 mole

Answer: Ture

Explanation: A small standard deviation means that the data is more clustered around the mean (More reliable).

Polarity is the distribution of electrical charge among the atoms connected by a chemical bond.

1. CH2CL- Carbon has an electronegativity of 2.5, hydrogen has a 2.2 electronegativity, and the chlorine atom has a 3.1 electronegativity. Their electronegativities differ by 0.3 for C-H and 0.6 for C-Cl. The fact that dichloromethane is a polar molecule is therefore confirmed.

2. CH3OH- The C-O bond has a difference in electronegativity of 3.44 - 2.55 = 0.89, which cannot be disregarded. The C-O bond is hence polar. The O-H bond is polar because the difference in electronegativity is 3.44 - 2.2 = 1.24.

3. OF2 - Two O-F covalent bonds can be found in OF2 O F 2. Oxygen has an electronegativity of 3.5. Fluorine has an electronegativity of 4.0. Therefore, there is a 0.5 discrepancy between the electronegativity values. Thus OF2 is polar.

4. CCl4 - Carbon tetrachloride (CCl4) is a non-polar molecule with µ=0

5. BF3 - It is more than 0.5 because the difference between the electronegativity values of B and F is equivalent to 1.94 (3.98 - 2.04 = 1.94). Therefore, each B-F bond in the molecule of boron trifluoride (BF3) is polar.

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0.072251

Explanation:

The Sig Figs would be 5 (0.072251)

In Decimals 6 (0.072251)

Scientific Notation 7.2251 × 10-2

E-Notation 7.2251e-2

Answer:

ddddddfrvtrnsyjemn

Explanation:

dddddddddddd

look at the screenshot