In silicate minerals, the SiO 4 tetrahedron can be chemically bonded to form all of the following EXCEPT O a. triple chains. O b.double chains. O c. independent tetrahedra. O d. sheets.

Answer:ok

Explanation:why you take picture upside down

Answer:

although it is possible to have more than one state, it is also possible to have only one state

Answer:

The movement is random

Explanation:

Answer: D

Explanation: an increase in surface area of A

Answer:

If m or n is zero, the reaction is zero order in A or B, respectively, and the rate of the reaction is not affected by the concentration of that reactant. The overall reaction order is the sum of the orders with respect to each reactant. If m = 1 and n = 1, the overall order of the reaction is second order

(m + n = 1 + 1 = 2).

Explanation:

405 ml is the volume if the pressure is decreased to 0.200 atm while temperature is held constant

Initial Pressure P 1 = 0.6 atm

Final Pressure P 2 = 0.2 atm

Initial volume V 1 = 135 mL

Using Boyle's Law,

At constant temperature,

P 1 x V 1 = P 2 x V 2

0.6 atm x 135 mL = 0.2 atm x V 2

Final volume = V 2 = 0.6*135/0.2

= 405 mL

Thus if a sample of gas has a volume of 135 ml at 0.600 atm. 405 mL would be the volume if the pressure is decreased to 0.200 atm while temperature is held constant.

a sample of gas has a volume of 135 ml at 0.600 atm. what would be the volume if the pressure is decreased to 0.200 atm while temperature is held constant?

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The solutions will be ranked as follows from lowest to highest vapor pressure:

20 g. of glucose C6H12O6 in 100ml h2o

20 g. of sucrose C12H22O11 in 100ml h2o

10 g. of potassium acetate KC2H3O2 in 100ml h2o

The vapor pressure depends on the concentration and nature of the solute. A nonvolatile solute like sugar will decrease the vapor pressure of the solvent, while a volatile solute such as acetate salt , will increase it

Both glucose and sucrose are non-volatile solutes, so they will decrease the vapor pressure of the solvent and thus will have lower vapor pressure than the pure solvent. However, sucrose has a lower molecular weight than glucose which means that it will have a greater effect on the vapor pressure of the solution and thus have a slightly lower vapor pressure.

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Alcohol is more soluble in water than ether. And CH4 is non polar. So, CH4 will be almost insoluble water.

CH3OH - most soluble

CH3-O-CH3 - second

CH4 - least soluble.

Solubility is defined as the maximum amount of a substance that will dissolve in a specified amount of solvent at a specified temperature. Solubility is a characteristic property of a particular solute/solvent combination, and different substances have very different solubilities.

Solubility can be expressed in grams of solute in one liter of saturated solution. For example, the solubility in water at 25 oC is 12 g/L. Molar solubility is the number of moles of solute per liter of saturated solution. For example, 0.115 mol/L at 25 oC

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A reaction produces 14.2 grams of a product. The theoretical yield of that product is 17.1 grams. The true statements are (E) The actual yield of the product is 14.2 grams and (C) The percent yield of the product is 83.0%.

The actual yield refers to the amount of product obtained in the reaction, which is given as 14.2 grams. It represents the experimental result of the reaction.

The percent yield is a measure of how efficiently the reaction produces the desired product. It is calculated by dividing the actual yield by the theoretical yield (17.1 grams) and multiplying by 100. In this case, the percent yield is approximately 83.0%.

The other statements (A, B, D, F) are not true. The percent yield cannot be equal to the actual yield, and it cannot exceed 100%.

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Complete question :

A reaction produces 14.2 grams of a product. The theoretical yield of that product is 17.1 grams. Which of the statements are true? Select 2 that apply.

A. The percent yield of the product is 14.2%.

B. The percent yield of the product is 17.1%.

C. The percent yield of the product is 83.0%.

D. The percent yield of the product is 120.0%.

E. The actual yield of the product is 14.2 grams.

F. The actual yield of the product is 17.1 grams.

Answer:

6,570,000

Rounded to 3 significant figures. The figures therefore are 6, 5, 7

Answer:

200 moles of nitric acid are produced from 300.00 mol of nitrogen dioxide.

Explanation:

You know that the balanced reaction is:

3 NO₂ + H₂O ⇒ 2 HNO₃ + NO

The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them. That is, what is intended with it is to find the fourth term of a proportion knowing the other three. Remember that proportionality is a constant relationship or ratio between different magnitudes.

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied. To solve a direct rule of three, the following formula must be followed:

a ⇒ b

c ⇒ x

So:

\(x=\frac{c*b}{a}\)

In this case, the rule of three can be applied in the following way: if 3 moles of NO₂ produce 2 moles of HNO₃ by stoichiometry of the reaction, 300 moles of NO₂ how many moles of HNO₃ do they produce?

\(moles of HNO_{3} =\frac{300 moles of NO_{2}*2 moles of HNO_{3}}{3 moles of NO_{2}}\)

moles of HNO₃= 200

200 moles of nitric acid are produced from 300.00 mol of nitrogen dioxide.

Answer:

200.0 mol

Explanation:

im smart :)

Answer:

When no coefficient is written in front of a formula it is assumed to be 1. 4. Numbers appearing in the formulas are known as subscripts. These can never be changed when balancing the equation or you will change the identity of the substance.

Explanation:

1. Reactants go on the left hand side and products go on the right hand side of a chemical equation. Be sure to write the correct formulas for the reactants and products.

· Remember atoms are conserved in a chemical reaction. ie they are neither created or destroyed. So all the atoms in the reactants must end up somewhere among the products.

2. Count the number of atoms of each element, compound or ion in the reactants and products. If they are not equal proceed further.

3. Balance the atoms one at a time by placing coefficients in front of the formula so that the numbers of atoms of each element are equal on both sides of the equation. Remember atoms may exist in an element, compound or ion.

· It is usually easier to start with the atoms that occur in only one substance on each side of the equation.

· Balance the atoms that occur in compounds before attempting to balance atoms that occur in elemental form. e.g. H2, O2 or Cl2

· To make it easier if a polyatomic ion appears unchanged on both sides of the equation treat it as a whole unit.

· When no coefficient is written in front of a formula it is assumed to be 1.

4. Numbers appearing in the formulas are known as subscripts. These can never be changed when balancing the equation or you will change the identity of the substance.

· Remember with subscripts, any number to the right of parentheses multiplies each subscript within the parentheses.

eg Fe2(SO4)3 contains 2 Fe atoms, 3 S atoms and 12 O atoms.

5. Finally make sure that all the coefficients are in the smallest possible whole number ratio.

The number which we will never use as a coefficient in any chemical reactions are decimals and fractions.

Coefficients are the numbers which are written before any chemical entity of any chemical reaction.

Coefficients of any reaction will not be:

Coefficients are generally use for balancing the chemical reactions.

So, we will not use decimals and fractions as a coefficient.

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D) [Co(NH3)5Cl](NO3)2. This complex ion has four 3d electrons associated with the cobalt transition metal. [Mn(H2O)6]3+ has five 3d electrons, [Cr(NH3)6]3+ has three 3d electrons, Ti atom has two 3d electrons, and K3[Fe(CN)6] has no transition metals with 3d electrons.

The number of 3d electrons is important in determining the electronic configuration and properties of transition metal complexes. The transition metal in this complex is Chromium (Cr), which has an atomic number of 24. Its electronic configuration is [Ar]3d^5 4s^1. When it forms a 3+ ion (Cr^3+), it loses one 4s and two 3d electrons, leaving four 3d electrons: [Ar]3d^4. The ligands (NH3) do not contribute to the metal's electron count, so [Cr(NH3)6]3+ is the correct option with four 3d electrons associated with the transition metal.

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The answer is most likely D

Answer:

A is the answer.

Explanation:

Answer: the answer is B hope it hepls

Explanation:

Answer:

Three ways I can come up with are increasing the temperature, increased the amount of solvent, and using a solvent with similar polarity as the solute.

Explanation:

The equilibrium constant of the second reaction is 0.155.

The equilibrium constant is a numerical value that shows the extent to which reactants are converted into products at a given temperature.

Now, we have the reaction; 3Z + Q ⇄ 2 X  and  4 X ⇄ 6 Z + 2 Q.

In the first reaction;

K =[ X]^2/[Z]^3 Q

In the second reaction;

[Z]^6 [Q]^2/[X]^4

Let [ X]^2 = A

[Z]^3 Q = B

Then the second reaction can be;

K = (B)^2/(A)^2 = (B/A)^2

The equilibrium constant of the second reaction therefore is; (1/2.54)^2

K = 0.155

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Answer:

Carbon Monoxide- D)

Nitrogen Oxides- A)

Particulate matter- C)

Sulfur Oxides- B)

Explanation:

Answer is 100% verified

Count on me, I'm a Chemistry Guru

Answer:

21. D (Food moves into the small intestine.)

22. C (Food is stored and further broken down by acid and powerful enzymes.)

23. A (Your saliva helps break down what you're eating and turn it into chemicals called enzymes.)

24. B (...Food moves through your esophagus.)

25. E (Anything left in the small intestine moves into the large intestine.)

Explanation:

Food first enters the mouth where it is chewed and broken down by salivary amylase. Then, it is swallowed, moving down the esophagus to the stomach where it is stored and further broken down by acids and enzymes. And, these broken down food molecules moves into the large intestine.

Mendeleev noticed that patterns appeared when he arranged the elements in order of increasing atomic mass.

Dmitri Mendeleev noticed that when the elements were arranged in order of their increasing atomic mass, a pattern of chemical and physical properties was repeated every eighth element. Mendeleev noticed that certain similarities in chemical properties appeared at regular intervals among the elements when they were arranged in increasing order of atomic mass.

The elements when they were arranged in increasing order of atomic mass he used the pattern to predict the existence of undiscovered elements and to predict the properties of those elements. You can check out the related link for a better understanding of the topic.

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Answer: Atoms are made of dust because God made us with dust.

Explanation:

Characteristics of the audience that can be categorized, such as age, gender, cultural background, educational level, and economic status are called demographic variables.

Demographic variables are characteristics of an audience that can be categorized based on factors such as age, gender, cultural background, educational level, and economic status. These variables provide insights into the composition and diversity of the audience, enabling better understanding and customization of communication strategies. Age can influence preferences and interests, gender can affect communication styles, cultural background shapes beliefs and values, educational level reflects knowledge and language proficiency, and economic status influences purchasing power and consumer behavior. Recognizing and considering these demographic variables helps in tailoring messages, content, and approaches to effectively engage and resonate with different segments of the audience.

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Element “X” belongs to family 2A, meaning it is part of the family that includes elements such as Be and Mg. These elements will all have 2 valence electrons and can be represented by the following Lewis diagram:

Element “Y” belongs to family 5A, meaning it is part of the family of elements that includes elements such as N and P. These elements will all have 5 valence electrons and can be represented by the following Lewis diagram:

Atoms from these two families will usually react with each other by losing or gaining valence electrons to create stable ions (an ion is what we call an atom/particle that has a charge). These stable ions form by the atoms either losing or gaining electrons until they have the same number of valence electrons as the nearest Noble Gas. This means that each ion will have a full valence shell (usually consisting of 8 electrons), often referred to as a “stable octet”, and this process of creating stable ions is often called the “octet rule”.

Atoms with fewer that 4 valence electrons will normally have a weak hold on their valence electrons and will tend to lose their valence electrons when forming ions.

Atoms with 4 or more valence electrons will normally have a strong hold on their valence electrons and will tend to gain electrons when forming ions.

The charge on the ion arises from the fact that, initially, the atom is electrically neutral because it has the same number of electrons (negative charges) as protons (positive charges). By losing electrons, the atom will end up with more protons (positive charges) than electrons (negative charges) and will form an ion with an overall positive charge. By gaining electrons, the atom will end up with more negative electrons than positive protons becoming an ion with an overall negative charge.

So, an atom of element “X”, with only 2 valence electrons, must lose its 2 valence electrons (which will be gained by element “Y”) to form a stable ion with a 2+ charge (losing two electrons leaves the ion with 2 more positive charges (protons) than negative charges, so a net charge of 2+).

An atom of element “Y”, with 5 valence electrons, must gain 3 electrons (from element “X”) to form a stable ion with a 3- charge (gains 3 extra negative charges).

We can show this process using Lewis diagrams:

From this set of diagrams you can see that in order to create stable ions of both “X” and “Y” we need these atoms to react with each other in a 3:2 ratio (we need 3 atoms of X for every 2 atoms of Y). This means that the resulting chemical formula of the compound will be:

Now, we will look at a short cut that can help you figure this out without having to draw Lewis diagrams.

Compounds are electrically neutral, meaning they must contain equal numbers of positive and negative charges. For compounds consisting of oppositely charged ions, this means that the total charge of the negative ions must be equal to the total charge of the positive ions. In other words the ions must combine in a ratio that makes their charges add to zero.

If we look at the compound we just made, X3Y2, we can confirm this:

So, now you can you predict the formula of simple ionic compounds:

from the family of elements, determine the number of valence electrons each element has

determine the charge of the ions that each atom will form using the octet rule (or look on the periodic table, most will tell you the stable ionic charges that each element can form)

determine the ratio of positive ions to negative ions that results in an overall charge of zero

Example,

What is the formula of a compound produced when an element from family 3A combines with an element from family 7A?

Answer:

120 kPa = 1.25 L

Explanation:

Because 120/1.50 is 80. And then if you divide 100 by 80, you get 1.25.

Sucrose is a nonreducing sugar because its anomeric carbons are involved in a glycosidic linkage between glucose and fructose, and are not free to participate in oxidation reactions. Therefore, sucrose cannot act as a reducing agent, and is classified as a nonreducing sugar.

Disaccharides are composed of two monosaccharide units that are linked together by a glycosidic bond. The reducing or nonreducing property of a disaccharide depends on the presence or absence of a free anomeric carbon in its structure.

A reducing sugar is a sugar that has a free anomeric carbon atom that can be oxidized, for example, in the presence of Benedict's reagent. This means that reducing sugars can act as reducing agents, and are capable of reducing other compounds.

All disaccharides except sucrose are reducing sugars because they have a free anomeric carbon atom that can be oxidized. For example, maltose, lactose, and cellobiose all have a free anomeric carbon that can be oxidized, making them reducing sugars.

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- To calculate the length of wire we can use a mathematical Rule of Three:

- So, in this case the length would be:

We can write the math expression as:

Here, L is the length of wire and w is the wire weighs.

R. F.M (Relative Formula Mass ) of Ca=40

40g of Ca=1 mole

204g of Ca=(1*204)/40

=5.1 moles

One way to climb from the bottom of a flight of stairs to the top in O(n2) time is to use a brute force approach. This involves considering every possible combination of steps that can be taken at each stair and keeping track of the minimum number of steps needed to reach the top.

This can be done by recursively considering all possible steps from each stair and choosing the minimum among them. While this approach may not be the most efficient, it guarantees that the solution will be found in no more than O(n2) time.

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If energy flows out of a chemical system and into the surroundings, the sign of δesystem is negative. This is because the change in energy of the system (δesystem) is equal to the negative of the change in energy of the surroundings (δesurroundings) due to the law of conservation of energy.

Therefore, if energy is leaving the system and entering the surroundings, the energy of the system is decreasing and the energy of the surroundings is increasing, resulting in a negative δesystem value.

If energy flows out of a chemical system and into the surroundings, the sign of δEsystem (change in internal energy of the system) is negative. This indicates that the system has lost energy to the surroundings.

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Answer:

Independent variable- nature of irrigation water

Dependent variable- height of the plants

Explanation:

In every study, there must be an independent and a dependent variable. The dependent variable changes its value as the value of the independent variable changes.

When the nature of irrigation water is manipulated, the height of the plant changes accordingly. This implies that the nature of irrigation water (microwaved or tap water) is the independent variable while the height of the plant (the response) is the dependent variable.