A grain of sand weighs approximately 0.0102 grams. How many molecules of SiO2 are in a grain of sand? Assume that sand is 100% SiO2.

because it's provide insight into the chemical behaviour of elements by helping determine the valence electrons of an atom

that's my answer

Answer:

The body temperatures in degrees Fahrenheit of a sample of adults in onle small town are 96.6 99.6 96. 3 97.3 99.8 97.7 97,6 97.9 99.2 Assume body temperatures of adults are normally distributed Based on this data find the 9900 confidence Interval of the mean body temperature of adults in the town Enter Your answer as an Open-interval (i.e. parentheses) accurate to 3 decimal places. Assume the data is from normally distributed population_ 9900 CI = Previewv Tp Enter 4euleie er using intewval notation. Example: [2,5) Uge U fcr unicr to combine interval:, Example: (-00,2] U [4,00} Entet each Faluce nunber (like 33,2.2172) Or 33 calculztion (like 5/3,243 5-4) Enter DNE for ar empty set, Use 00 to enter Infinity. Enter each valze accurate to decial place: Get Help: Points possible: 10 This attempt of 3 Me ye ingtmctor absutthis questin Poelis quesivto 6 EpIC e 6 DeA

Explanation:

(Unsure if this helped but hope it did!)

460 grams of Potassium periodate contains 128 grams of Oxygen and 253.9 grams of Iodine.

A compound is composed of atoms from two or more different elements chemically bonded together in fixed small whole number ratios to each other.

Mass of potassium= 17.0 grams

Mass of Oxygen= 27.8 grams

Mass of Iodine= 55.2 grams.

Mass of Potassium periodate= Mass of Potassium+Mass of Oxygen+Mass of Iodine

Mass of Potassium periodate= 17g+27.8g+55.2g

Mass of Potassium periodate= 100 grams

Therefore, 100 grams of Potassium periodate contains 27.8 grams of Oxygen

1 gram Potassium periodate contains 27.8/100= 0.278 grams of Oxygen

So, 1×460= 460 grams Potassium periodate contains 0.278×460

=128 grams Oxygen

Now,

100 grams of Potassium periodate contains 55.2 grams of Iodine

1 gram of Potassium periodate contains 55.2/100=0.552 grams of Iodine

1×460=460 grams Potassium periodate contains 0.552×460

=253.9 grams of Iodine.

So,  460 grams of Potassium periodate contains 128 grams of Oxygen and 253.9 grams of Iodine.

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The lowest and largest conversion factors are nanoliters and kiloliters, respectively. Among all the given options,  the correct option is option C.

A liquid, solid, or gas's volume is the amount of three-dimensional space it occupies. Although there are many different units that may be used to indicate volume, the most common ones are liters, m³, gallons, milliliters, teaspoons, as well as ounces.

Gases have a volume equal to the internal capacity of the container since they fill their containers to the brim. Containers with a designated volume or one whose interior form is known are frequently used to measure liquids. Measuring cups, graded cylinders, flasks, as well as beakers are a few examples of the tools used to quantify liquid volume.  3.0x10⁻¹²kiloliters represents the greatest volume.

Therefore, the correct option is option C.

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Apply Boyles law

Remember

If Volume is four times increased pressure is 4 times decreased

Answer:

A + B → C + D + heat

Explanation:

A. A+B+heat⇒C+D

In an endothermic reaction, the system requires energy/heat, the enthalpy change is positive.

Individual marble:

Answer:

Individual Marble

Use the formula 4/3_?_ R^3, to solve for the volume. Here, R is the radius, or half of D. ^3 means the radius is cubed.

Explanation:

Answer:

super saturation takes place.

Answer:

= 0.4 M

Explanation:

data:

moles = 0.060 moles

volume = 1500 ml

             = 1500 / 1000

              = 1.5 dm^3

solution;

      molarity = [tex]\frac{no. of moles}{volume in dm^3}[/tex]

                    = 0.060 / 1.5

         molarity  = 0.4 M

Answer:

D-Petroleum

Explanation:

because it takes millions of years to form petrol and it cannot be renewed again

A Plate Boundaries and Movement Lab Report is a report that shows the records of all the data relating to the movement of Plate Boundaries and their movements.

A tectonic plate is also described or referred to as a Lithosperic Plate. In Geography, it is described as a slab of rock that is not shaped regularly.

In most cases, it comprises continental and oceanic lithosphere.

Plate Boundaries and their movement are largely linked to volcanic activities and earthquakes. This means that they can be used to predict when any of the above-mentioned events may happen.

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Answer:

30 moles

Explanation:

From the equation it is a one - to - one reaction

[tex] \begin{gathered} \begin{array}{ |c|c| } \pmb{ \sf{Electrolyte}}& \textsf{ \textbf{Formula of Ions}}\\ \\ \\ \sf sodium \: sulphate& \bf \red{Na_2SO_4} \\ \\ \sf magnesium \: chloride& \red{ \bf MgCl_2} \\ \\ \sf zinc \: sulphate & \bf \red{ZnSO_4} \\ \\ \sf potassium \: iodine& \red{ \bf KI} \\ \\ \sf sodium \: hydroxide& \bf \red{NaOH} \\ \\ \sf Copper(II) \: chloride & \red{ \bf CuCl_2} \\ \\ \sf silver \: nitrate& \red{ \bf{AgNO_3}}\end{array}\end{gathered}[/tex]

[tex]\\\\\\[/tex]

valency:

Sodium - [tex]\sf Na^+[/tex]

sulphate - [tex]\sf {SO_4}^{-2}[/tex]

valency:

Magnesium- [tex]\sf Mg^{+2}[/tex]

Chloride- [tex]\sf Cl^{-1}[/tex]

valency:

zinc- [tex]\sf Zn^{+2}[/tex]

sulphate [tex]\sf SO_4^{-2}[/tex]

valency:

potassium - [tex]\sf K^{+1}[/tex]

sulphate - [tex]\sf I^{-1}[/tex]

valency:

sodium - [tex]\sf Na^{+1}[/tex]

hydroxide - [tex]\sf OH^{-1}[/tex]

valency:

Copper(II) - [tex]\sf Cu^{+2}[/tex]

chloride - [tex]\sf Cl^{-1}[/tex]

valency:

Silver - [tex]\sf Ag^{+1}[/tex]

nitrate - [tex]\sf NO_3^{-1}[/tex]

[tex]\\\\\\[/tex]

Key Points :

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Answer:

Molar Mass (Cr₄(PO₄)₃): 492.894 g/mol

Explanation:

First, collect the individual molar masses of each element. These values are found on the periodic table under each respective element.

Chromium (Cr): 51.996 g/mol

Phosphorus (P): 30.974 g/mol

Oxygen (O): 15.999 g/mol

The quantity of each element is determined by the subscript next to it. If their is a subscript directly to the right of a set of parentheses, multiply each element within the parentheses by the subscript.

Chromium (Cr): 4

Phosphorus (P): 1 x 3 = 3

Oxygen (O): 4 x 3 = 12

Finally, the total molar mass of the compound is the collective molar masses of each element times the quantity of each element.

Molar Mass (Cr₄(PO₄)₃): 4(51.996 g/mol) + 3(30.974 g/mol) + 12(15.999 g/mol)

Molar Mass (Cr₄(PO₄)₃): 492.894 g/mol

Answer:

well it is because of mainly what we call reaction the petrol are highly reactive with the flames

The name of the compound is 2-methyl-3-ethylheptanoic acid.

Looking at the structure, the longest carbon chain is 7. Meaning that the compound is a heptanoic acid.

There are 2 branches. The first one has a single carbon (methyl) while the second one has 2 carbons (ethyl).

The methyl is located on the second carbon (2-methyl) while the ethyl is located on the third carbon (3-ethyl) on the main chain.

Thus, the name of the compound would be 2-methyl-3-ethylheptanoic acid.

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Answer:its c 3-ehtyl

Explanation:

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

Cable wires are usually made of of thermoplastics because, current passing through the wire has heating effects as well, due to collision of electrons in the conducting wire. so to avoid the melting of normal wire which can break the circuit, Thermoplastics are used, that doesn't have much effect of heat on them.

Answer:

The solubility product constant (Ksp) describes the equilibrium between a solid and its constituent ions in a solution. The value of the constant identifies the degree to which the compound can dissociate in water. The higher the Ksp, the more soluble the compound is.

Answer:

MCO3(s) M2+(aq) + CO32-(aq) The solubility constant Ksp for a carbonate compound MCO3, Ksp = 2.83E-7. A saturated solution of the compound MCO3, is made.

Explanation:

Answer:

100 degree is the answer of given statement

Convert

Apply Charles law

Answer:

See below ~

Explanation:

Q1

Given :

Unknown :

Formula :

Solution :

Final Answer :

Q2

Given :

Unknown :

Formula :

Solution :

Final Answer :

Answer:

lithium lithium (or 2lithium) + oxygen ->

Explanation:

Your welcome

The half-life is the time used by the concentration to get half of its initial value. The cotton cloth is 5097 years old.

Radioactive decay is the reduction of the initial concentration to the half value. The exponential decay can be given as:

[tex]\rm N(t) = N_{0}e ^{-\lamda t}[/tex]

The decay constant is calculated as:

[tex]\begin{aligned} \lamda &= \rm \dfrac {ln (2)}{t\frac{1}{2}}\\\\&= \dfrac{\rm ln(2)} {5730}\\\\&= 0.0001209\end{aligned}[/tex]

Solving further:

[tex]\begin{aligned}0.22 &= \rm e^{-0.0001209 \times t}\\\\\rm ln 0.22 &= -0.0001209 \times t\\\\\rm t &= \rm \dfrac{log 0.22}{-0.0001209}\\\\&= 5097 \;\rm years\end{aligned}[/tex]

Therefore, the cotton cloth is 5097 years.

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The significant figures in the number 0.00521 is : 3 Significant figures.

Significant figure can be defined as numbers within the number system that has value or gives value to a number list.

Significant figures are numbers that has a measure of value assigned to them as a reason of where they are placed.

In conclusion, the number above contains only three significant figures.

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The answer to the correct number of significant figures is 0.171.

The numbers 1 to 9 will always be significant figures. Leading zeros of a number are not significant figures. Zeros to the right of a number are significant figures.

In this case we have:

[tex]0.97584/5.68 = 0.171[/tex]

So you only need the three numbers after the dot.

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Answer:

of Equilibrium Constant

Consider the chemical system:

2 NO(g)

N₂(g) + O₂ (g)

K = 2.1 x 1030

How do the equilibrium concentrations of the reactant compare to the equilibrium concentration of the products?

Select one:

O a. They are much lower

O b. They are much higher

O c.

They are about the same order of magnitude

O d. They have to be exactly equal

e.

You can't tell from the information

Explanation:

of Equilibrium Constant

Consider the chemical system:

2 NO(g)

N₂(g) + O₂ (g)

K = 2.1 x 1030

How do the equilibrium concentrations of the reactant compare to the equilibrium concentration of the products?

Select one:

O a. They are much lower

O b. They are much higher

O c.

They are about the same order of magnitude

O d. They have to be exactly equal

e.

You can't tell from the information

Answer:

: The conductivity of electrolyte solutions: (a) 0.1 M NaCl (b) 0.05 M NaCl (c) 0.1 M HgCl2. An electrolyte solution conducts electricity because of the movement of ions in the solution (see above). The larger the concentration of ions, the better the solutions conducts. Weak electrolytes, such as HgCl2, conduct badly because they produce few ions when dissolved (low concentration of ions) and exist mainly in the form of molecules.

Explanation:

Population density is the number of specific organisms living in a particular area. The tectonic plate movements in the Ring of Fire area can cause volcanic eruptions and earthquakes.

Tectonic plates are the parts of the crust and the mantle of the earth layer that is also called the lithosphere plate. They are not stationary and have slight movements on the mantle which comprises the hot lava.

The movement of these tectonic plates in the area of the Ring of fire causes the eruption of the lava and disrupts the crust causing an earthquake. This consequence affects the life habiting them.

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Answer:

im pretty sure because the plates move which causes these natural disasters

Explanation: