Which one has the greatest mass, Hg or Co?

Answer:

97.561 g/mol

Explanation:

Answer:

D 4P +3O₂ → 2 P₂O₃

Explanation:

In this problem, we need to convert the mass of phosphorus and oxygen to moles trying to find the ratio of reaction (The moles of P that reacts per mole of O₂):

Moles P:

12.4g P * (1mol P / 31g) = 0.4 moles

Moles O₂:

9.6g * (1mol / 32g) = 0.3 moles

The ratio of reaction is:

0.4 mol / 0.3 mol = 1.33 = 4 moles of P / 3 moles of O₂

That means 4 moles of P react with 3 moles of O₂ and the reaction that represents this ratio is:

The reaction of 12.4 g Phosphorous with 9.6 grams of Oxygen will be represented as [tex]\rm 4\;P\;+\;3\;O_2\;\rightarrow\;2\;P_2O_3[/tex]

In a chemical equation, the stoichiometric values are the moles of the molecules involved in the reaction. For the reaction of Phosphorous and oxygen, the moles of both elements are to be calculated.

Moles = [tex]\rm \frac{weight}{molecular\;weight}[/tex]

Moles of Phosphorous = [tex]\rm \frac{12.4}{31}[/tex]

Moles of Phosphorous = 0.4

Moles of oxygen = [tex]\rm \frac{9.6}{16}[/tex]

Moles of oxygen = 0.6

Moles of [tex]\rm O_2[/tex] = 0.3

The equation will be:

[tex]\rm 0.4\;P\;+\;0.3\;O_2\;\rightarrow\;2\;P_2O_3[/tex]

[tex]\rm 4\;P\;+\;3\;O_2\;\rightarrow\;2\;P_2O_3[/tex]

The correct reaction will be D.

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Answer:

Physical properties

Atomic mass: 55.845

Density: 7.87 g/cm3

Group: Transition metals

Electrons: [Ar] 3d6 4s2

Melting point: 1811 K

Boiling point: 3134 K

Discovered: Ancient times

Explanation:

hope this helps! :D

Answer:

covalent bond

Explanation:

Answer:

The covalent bond is the chemical bond formed when two atoms share electrons.

Answer:

I can help and what are you confused about? pls hurry my lunch break will be over

Explanation:

Explanation:

Mole ratio of Oxygen to Hydrogen gas = 1 : 2.

If we use 3.0 moles of oxygen gas, we would need 3.0 * 2 = 6.0 mol of hydrogen gas.

However we only have 4.2 mol of hydrogen. Therefore hydrogen is limiting and oxygen is in excess. (B)

Answer:

107.8

Explanation:

64 gram of N2H4 produce 72 gram of H20

then by crossmultiplication

64*121.3/72=107.82

Answer:

X 154

Check solution in explanation

Explanation:

Average atomic mass = ( mass 1× abudance) + ( mass 2× abudance)+ ( mass 3× abudance) / 100

(149×13.8)+(152×44.9) +(154×41.3)/100

2056.2 + 6824.8 + 6360.2/100

=152.412

Answer: The concentration of the resulting solution is 0.025 M

Explanation:

According to the dilution law,

[tex]M_1V_1=M_2V_2[/tex]

where,

[tex]M_1[/tex] = molarity of concentrated [tex]NaOH[/tex] solution = 1.0 M

[tex]V_1[/tex] = volume of concentrated [tex]NaOH[/tex] solution = 50 ml

[tex]M_2[/tex] = molarity of diluted [tex]NaOH[/tex] solution = ?

[tex]V_2[/tex] = volume of diluted [tex]NaOH[/tex] solution = 2.0 L = 2000 ml (1L=1000ml)

Putting in the values we get:

[tex]1.0\times 50=M_2\times 2000[/tex]

[tex]M_2=0.025M[/tex]

Therefore, concentration of the resulting solution is 0.025 M

The concentration of the resulting solution if 50. mL of 1.0 M NaOH is diluted with distilled water to a volume of 2.0 L is 0.025M

HOW TO CALCULATE FINAL CONCENTRATION:

C1V1 = C2V2

Where;

According to this question;

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Answer:

Periodic tables can use color to identify other element characteristics. For example, an electronegativity periodic table color codes the elements based on how electronegative they are. The valence periodic table uses color to identify the most common valence state for each element.Oct 2, 2019

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The color given to a the elements in periodic table is to characteristics of the elements mainly to identify whether they are solid, gas or liquid. Thus option D is correct.

A periodic table contains all the discovered elements which are classified into different groups and periods. Groups are vertical columns of elements with similar properties and same number of valence electrons.

Periods are horizontal rows from left to right with an increase in atomic number. There are 18 groups and 7 periods in periodic table. Each group has given each color and some elements showing exceptional characteristics such as hydrogen and helium have separate colors.

All the first group elements called alkali metals have one color and the second groups elements with another color, All the d-block elements are given the same colour and metals in p-block elements have the same color.

Similarly, all the metalloids have one color and all other gases have the same colour in which inert gas group and halogen group have seperate colours.

Hence, the color in periodic table helps to identify the element's nature like its state also. Thus option D is correct.

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Answer:

5

Explanation:

Protons are depicted in this picture as +, and the no. of protons are always equal to the no. of electrons (unless it's an ion).

Over here, there are 5 protons therefore there should also be 5 electrons.

Answer:

∆T = imK

∆T = Change in boiling point (B.P.)

i = van't Hoff factor = 2 for NaCl (Na+ and Cl2_

m = molality = 0.321 m

k = boiling point constant for water = 0.512 deg/m

∆T = (2)(0.321)(0.512) = 0.329 degrees

Since the normal B.P. for water is 100ºC, the new boiling point of this solution is 100 + 0.329 = 100.329ºC

So Our Answer is 100.329ºC

The boiling point of the 0.321 m NaCl solution has been 100.329 degrees Celsius.

The boiling point has been defined at the temperature at which the liquid started to convert to gas.

The van't Hoff factor has been a value of the number of ions formed by the dissociation of 1 formula unit of a compound.

The change in the boiling point of the sample, ([tex]\Delta T[/tex]) has been given by:

[tex]\Delta T=imK[/tex]

Where, the van't Hoff factor for NaCl, i =-2

The molality of the sample, m =0.321 m

The boiling point constant of water, [tex]K=0.512\;^\circ m^-^1[/tex]

Substituting the values for change in temperature ([tex]\Delta T[/tex]):

[tex]\Delta T=2\;\times\;0.321\;\times\;0.512\;^\circ C\\\Delta T=0.329\;^\circ C[/tex]

The change in the temperature of the water on the addition of NaCl has been 0.329 degrees Celsius.

The initial temperature of the water has been 100 degrees Celsius. The new temperature (T) of the NaCl solution has been:

[tex]T=100\;+\;0.329\;^\circ \text C\\T=100.329\;^\circ \text C\\[/tex]

The new boiling point of the NaCl solution has been 100.329 degrees Celsius.

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Answer:

121.37 moles

Explanation:

I'm not sure

Answer:

1.21 x 10^2

Explanation:

1.1 × 10²² atoms Au

Chemistry

Atomic Structure

Math

Pre-Algebra

Order of Operations: BPEMDAS

Step 1: Define

3.7 g Au

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of Au - 196.97 g/mol

Step 3: Convert

[tex]3.7 \ g \ Au(\frac{1 \ mol \ Au}{196.97 \ g \ Au} )(\frac{6.022 \cdot 10^{23} \ atoms \ Au}{1 \ mol \ Au} )[/tex] = 1.13121 × 10²² atoms Au

Step 4: Check

We are given 2 sig figs. Follow sig fig rules and round.

1.13121 × 10²² atoms Au ≈ 1.1 × 10²² atoms Au

Answer:

See the attached notation!

Answer: The main purpose of any warhead is to inflict damage on the target. The way the damage is caused may vary with different types of warheads, but in the most general sense, damage is caused by the transfer of energy from the warhead to the target. The energy is typically mechanical in nature and takes the form of a shock wave or the kinetic energy of fragments. In either case, a large amount of energy must be released. For many warheads that energy is stored in the form of chemical explosives.

Explosive Reactions

There are many chemical reactions that will release energy. These are known as exothermic reactions. If the reaction proceeds slowly, the released energy will be dissipated and there will be few noticeable effects other than an increase in temperature. On the other hand, if the reaction proceeds very rapidly, then the energy will not be dissipated. Thus, a great quantity of energy can be deposited into a relatively small volume, then manifest itself by a rapid expansion of hot gases, which in turn can create a shock wave or propel fragments outwards at high speed. Chemical explosions may be distinguished from other exothermic reactions by the extreme rapidity of their reactions. In addition to the violent release of energy, chemical explosions must provide a means to transfer the energy into mechanical work. This is accomplished by expanding product gases from the reaction. If no gases are produced, then the energy will remain in the products as heat.

Most chemical explosions involve a limited set of simple reactions, all of which involve oxidation (reaction with oxygen). A relatively easy way to balance chemical explosive equations is to assume that the following partial reactions take place to their maximum extent (meaning one of the reactants is totally consumed) and in order of precedence:

Explanation:

Answer:

10 kilograms of dynamite

Explanation:

The more volume an object has the more potential energy is available if it is the same material. 10 kilograms is larger than 5 kilograms.

Answer:

4

Explanation:

i think

Answer:

The resultant structure is shown below. This structure contains four shared pairs of electrons, which are located on all four "sides" of carbon's electron dot structure. Each of these shared pairs was created by pairing one of carbon's unpaired electrons with an unpaired electron from chlorine.

Explanation:

Answer:

An organism is made up of four levels of organization: cells, tissues, organs, and organ systems. These levels reduce complex anatomical structures into groups; this organization makes the components easier to understand

Explanation:

Answer:

An ideal gas is a gas with particular characteristics.

Explanation:

Ideal gases are hypothetical which means that they do not exist in their true form.

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Answer:

Pd (palladium).

Explanation:

46 electrons total, this is representative of the Pd (palladium) element.

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Palladium (Pd) element is represented by the ground state electronic configuration.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

The ground state electronic configuration of 1s² 2s² 2p⁶3s² 3p⁶4s² 3d¹⁰ 4p⁶ 5s² 4d⁸ shows total 46 electrons. The element with atomic number 46 is palladium, Pd. Palladium is a d block element. Palladium is found in group 8 and period four of periodic table.

Therefore, palladium (Pd) element is represented by the ground state electronic configuration.

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Explanation:

Gravitational potential energy

= mgh

= (5kg)(9.81N/kg)(150m)

= 7357.5J.

Answer:

[tex]\boxed {\boxed {\sf 7350 \ Joules}}[/tex]

Explanation:

Gravitational potential energy can be found using the following formula:

[tex]E_P=m*g*h[/tex]

Where m is the mass, g is the gravitational acceleration, and h is the height.

The mass of the object is 5 kilograms. On Earth, the acceleration due to gravity is 9.8 meters per square second. The height is 150 meters.

[tex]m= 5 \ kg \\g= 9.8 \ m/s^2 \\h= 150 \ m[/tex]

Substitute the values into the formula.

[tex]E_p=(5 \ kg)(9.8 \ m/s^2)(150 \ m)[/tex]

Multiply the first two numbers.

[tex]E_P=(49 \ kg*m/s^2)(150 \ m)[/tex]

[tex]E_p=(49 \ N)(150 \ m)[/tex]

Multiply.

[tex]E_p=7350 \ N*m[/tex]

[tex]E_p= 7350 \ J[/tex]

The gravitational potential energy of the object is 7350 Joules

Answer:

A

Explanation:

A salad with lettuce, cheese, seeds, tomatoes, broccoli, and other vegetables is an example of a heterogeneous mixture.

Milk is not mixed with anything so that is incorrect

River water is mixed in with dirt and minerals so this one is incorrect

Beach sand is incorrect because you can see colored particles.

Answer:

BY NAMING THE MINERALS :>

Explanation:

Answer:

NAMING THE MINERALS

Explanation:

Skeletal structure is missing, so i have attached it.

Answer:

Option B: Omega 6 fatty acid

Explanation:

Arachidonic Acid is defined as an essential and unsaturated fatty acid. It's usually found in animal and human fat including the liver, brain, and also glandular organs. While in animals, it is a constituent of their phosphatides.

Arachidonic Acid is formed as a result of the synthesis from dietary linoleic acid and it's a preliminary stage in the biosynthesis of prostaglandins, thromboxanes, and leukotrienes.

In short, Arachidonic acid is basically a long-chain fatty acid which is a C20, Omega 6 polyunsaturated fatty acid that has four Z-double bonds.

Answer:

A reaction in which two or more reactants combine to form only one product is called a synthesis reaction.

Explanation:

Ammonium chromate

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