which structures function mainly in transport

The boiling point of sugar is a must to determine if a chemical change has occurred or not. Thus, the correct option is B.

A chemical change is the change which occurs when one substance combines with the other substance in solution. For examples while heating the sugar, it reacts with the oxygen gas present in the environment.

If we dissolve sugar in a glass of water, we can evaporate the water to get back to the solid sugar in the vessel. This is a physical change called a phase transition. A phase change involves a change in the state or form of the new substance formed.

Sugar does not boil, but instead will get re-crystallized in the beaker at a much higher temperature of about 320°F. As the temperature keeps on increasing, the water in the beaker will reach its boiling point, and turn into steam in the process of evaporation. Meanwhile, the sugar in the solution will begin to re-crystallize in the bottom of the vessel.

Therefore, the correct option is B.

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When metals and non metals combine in fixed proportion then a chemical compound is formed. The given Formula represents 2 sodium (Na) atoms and one sulfur (S) atom.

Chemical formula is a formula where cation and anion combine to form a molecule in fixed proportion. Metals combine in form of cation and non metals combine in form of anion.

Cation is the species that give electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral.

The formula for sodium sulfide Na₂S means 2 sodium (Na) atoms and one sulfur (S) atom are there. 2 sodium (Na) atoms and one sulfur (S) atom combine to form Na₂S.

Therefore, formula represents 2 sodium (Na) atoms and one sulfur (S) atom.

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Complex patterns of inheritance include traits affected by environmental factors, polygenic inheritance where traits are controlled by multiple genes, single gene mutations impacting multiple traits, and the presence of multiple alleles for a single trait.

The examples of complex patterns of inheritance include:

Polygenic inheritance refers to a trait that is controlled by more than one gene. In humans, traits like skin color, height, and weight are examples of polygenic characteristics. This type of inheritance can result in many possible phenotypes. Additionally, the phenomenon of multiple alleles exists when more than two alleles are present in a population, such as the ABO blood type alleles (IA, IB, and i).

Overall, complex inheritance patterns involve the interaction of multiple genes, the presence of multiple alleles within a population, and can also be influenced by environmental aspects.

Answer:

they grow, reproduce and die.

Explanation:

Microorganisms are a way of life that cannot be visualized without the aid of a microscope. These tiny beings can be found in the air, on the ground, and even in man. These tiny beings are not all the same, they can be very different in size and way of life. However, they all have in common a very simple structure and the impossibility of being seen without the use of a microscope. In addition, microorganisms can represent some characteristics of life, since as well as living beings in gereal they grow, reproduce and die.

Final answer:

Heat is the transfer of thermal energy between objects, while thermal energy is the total kinetic energy of all particles in an object. Heat causes a change in temperature, while thermal energy affects the overall temperature of an object.

Explanation:

Differences between Heat and Thermal Energy:

1. Definition: Heat is the transfer of thermal energy from an object at a higher temperature to an object at a lower temperature. Thermal energy is the total kinetic energy of all the particles in an object.

2. Transfer: Heat can be transferred between objects, while thermal energy remains within an object.

3. Temperature Change: Heat transfer causes a change in temperature, while thermal energy affects the overall temperature of an object.

Similarities between Heat and Thermal Energy:

1. Units: Both heat and thermal energy are measured in Joules.

2. Related: Heat is a form of thermal energy and both are related to the movement of particles.

3. Conservation: Both heat and thermal energy obey the law of conservation of energy.

Answer:

D) One standard drink, which contains .6 ounces (14 grams) of alcohol, contains around 97 calories

Explanation:

The amount of calories per gram of alcohol = 7 cal

i.e. Alcohol = 7 cal/g

A standard drink contains 0.6 ounces i,e. 14 grams of alcohol.

Therefore, the calories corresponding to that present in a standard alcoholic beverage would be:

[tex]= \frac{14\ g * 7\ cal}{1\ g} = 98\ cal[/tex]

Answer: C.article documenting experiments with their results

Explanation:

An independent variable is the variable that can be changed or manipulated so as to determine the result of such change on the dependent or the experimental variable.

In the given study, the color of light is the independent variable the effect of which is to be determined over the plant growth which is the dependent variable.

The information related to this experiment can be observed on the article documenting the experiments similar experiment. This will have valid and reliable information.

Answer:

Cesium

It is the most reactive element on the periodic table.

Answer:

the plates move which causes an earthquake.

Explanation:

i learned about this.

Answer:

i have no clue

Explanation:

The molarity of NaOH solution is [tex]\boxed{{\text{0}}{\text{.0635 M}}}[/tex]

Further Explanation:

The concentration is the proportion of substance in the mixture. The most commonly used concentration terms are as follows:

1. Molarity (M)

2. Molality (m)

3. Mole fraction (X)

4. Parts per million (ppm)

5. Mass percent ((w/w) %)

6. Volume percent ((v/v) %)

Molarity is a concentration term that is defined as the number of moles of solute dissolved in one litre of the solution. It is denoted by M, and its unit is mol/L.

The formula to calculate the molarity of NaOH solution is as follows:

[tex]{\text{Molarity of NaOH solution}}=\frac{{{\text{amount}}\;\left({{\text{mol}}} \right)\;{\text{of}}\;{\text{NaOH}}}}{{\;{\text{volume }}\left({\text{L}}\right)\;{\text{of}}\;{\text{NaOH solution}}}}[/tex]                 ...... (1)

Firstly the volume is to be converted into L. The conversion factor for this is,

[tex]{\text{1 mL} ={\text{1}}{{\text{0}}^{{\text{-3}}}}{\text{ L}}[/tex]

So the volume of NaOH solution can be calculated as follows:

[tex]\begin{aligned}{\text{Volume of NaOH solution}}&=\left({{\text{36}}{\text{.78 mL}}}\right)\left({\frac{{{\text{1}}{{\text{0}}^{-3}}{\text{ L}}}}{{{\text{1 mL}}}}}\right)\\&=0.03678\;{\text{L}}\\\end{aligned}[/tex]

The number of moles of KHP can be calculated as follows:

[tex]{\text{Moles of KHP}} = \frac{{{\text{Given mass of KHP}}}}{{{\text{Molar mass of KHP}}}}[/tex]                       …… (2)

The given mass of KHP is 0.477 g.

The molar mass of KHP is 204.22 g/mol.

Substitute these values in equation (2).

[tex]\begin{aligned}{\text{Moles of KHP}}&=\left({{\text{0}}{\text{.477 g}}}\right)\left({\frac{{{\text{1 mol}}}}{{{\text{204}}{\text{.22 g}}}}}\right)\\&={\text{0}}{\text{.0023357 mol}}\\\end{aligned}[/tex]

Since KHP is a monoprotic acid and NaOH is also monobasic. Therefore equal moles of KHP and that of NaOH will react and thus become equal. The moles of NaOH is 0.0023357 mol.

The moles of NaOH are 0.0023357 mol.

The volume of NaOH solution is 0.03678 L.

Substitute these values in equation (1).

[tex]\begin{aligned}{\text{Molarity of NaOH solution}}&=\frac{{{\text{0}}{\text{.0023357 mol}}}}{{{\text{0}}{\text{.03678 L}}}}\\&={\text{0}}{\text{.063504 M}}\\&\approx {\text{0}}{\text{.0635 M}}\\\end{aligned}[/tex]

So the molarity of NaOH solution is 0.0635 M.

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Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Concentration terms

Keywords: molarity, NaOH, KHP, monoprotic, amount of NaOH, molarity of NaOH solution, 0.003678 L, 36.78 mL, 0.0635 M, molarity of NaOH solution, 0.477 g and 204.22 g/mol.

The concentration of the stock NaOH solution is 0.0635 mol/L.

Given:

Molar mass of KHP = 204.22 g/mol

Mass of KHP used = 0.477 g

Number of moles of KHP = mass / molar mass

= 0.477 g / 204.22 g/mol

= 0.002336 mol

Since KHP is an acid with one acidic proton, it reacts with one mole of NaOH in a 1:1 ratio.

Therefore, the number of moles of NaOH used in the titration is also 0.002336 mol.

The volume of NaOH solution used = 36.78 mL

= 0.03678 L

The concentration of NaOH solution = number of moles/volume in liters

= 0.002336 mol / 0.03678 L

= 0.0635 mol/L

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Answer is: luster.

Luster is example of qualitative observations.

Qualitative observations are information about the quality of substances.  

In qualitative observation, informations are collected using senses (sight, hearing, taste, smell and touch).

Qualitative observations are not measurable and cannot be recorded in terms of numbers.

Luster is the way light interacts with the surface of a mineral.

Other example is cleavage, the tendency of mineral to split along definite crystallographic structural planes.

Answer:

reactivity

Explanation:

Answer:

homeostasis is the stabilizing of an organism's internal condition

Answer is: A man running 7 miles per hour west.

Velocity is equivalent to a specification of its speed and direction of motion, for example 100 km/h to the east.

Velocity is a physical vector quantity (measured in metres per second) and need magnitude and direction to define it, for example 100 metres per second east.

Answer: A man running 7 miles per hour west.

Explanation: Vector quantity is a quantity which has both magnitude and direction.

Scalar quantity is a quantity which has only magnitude.

Velocity is a vector quantity which expresses the speed of the body along with the direction in which it is moving.

[tex]v=\frac{distance}{time}=\frac{miles}{hour}[/tex]

Thus the correct option is A man running 7 miles per hour west.  

The answer is; C

There are 2 Carbons, 4 Hydrogens, and 6 oxygens  on both sides

All the moles of the elements on the right of the reaction equation are balanced with those on the left of the equation. These moles are indicated by the number in front  of the symbols of the elements. This ensures that the first law of thermodynamics is observed. This law states that no matter or energy can be destroyed or created; It can only be transformed.  

Option C. The law of conservation of mass has already been applied, is the correct option

The question asks how the law of conservation of mass applies to the chemical reaction C₂H₄ + 3O₂ ---> 2H₂O + 2CO₂.

Law of Conservation of Mass This means that the number of each type of atom in the reactants must be equal to the number of each type of atom in the products.

Balancing the Equation

In the given reaction: C₂H₄ + 3O₂ ---> 2H₂O + 2CO₂, we need to ensure that each element is balanced on both sides of the equation.

Since the number of atoms for each element is the same on both sides of the equation, the law of conservation of mass has been applied, and the equation is balanced.

Therefore, the correct answer is C .The law of conservation of mass has already been applied.

The name of the compound that has the formula Li₂SO₃ is lithium sulfite, it is an ionic compound, hence option A is correct.

Although lithium sulfate doesn't often increase in solubility with temperature like other salts do, it is soluble in water. Instead, because its dissolution is an exothermic process, its solubility in water declines as temperature rises.

It is simple to hydrolyze and absorb water vapor from the air, which releases gaseous hydrogen sulphide, which is extremely hazardous.

Lithium sulfite easily to dissolve in water, ethanol, acid, and base; difficult to dissolve in alkali.

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1. A toaster draws electric current (electrical energy) from a wall outlet and converts these moving electric charges into heat (thermal energy) in the filaments that turn red hot to cook your toast.

2. Coal is burned at a power plant. The chemical energy released as the coal is burned heats water and turns it into steam. The chemical energy causes the liquid water molecules to move faster increasing their thermal energy.