Amphibians have a closed circulatory system. What does this mean?

A. Fluids flow everywhere
B. Fluids stay in the lungs
C. Fluids are contained in tubes
D. Fluids do not flow

C) Methane reacts with chlorine in the presence of sunlight is example of substitution reaction.

Therefore, Methane reacts with chlorine in the presence of sunlight is example of substitution reaction.

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Answer:

Ice: solid and rigid. Water: Liquid and sloshy Gas: light and not dense.

Explanation:

Up ^

Answer:

just be yourself , if they are a good person that you want to be your friend they would support you and care about what you have to say.

Explanation:

Answer:

2NaHCO3---> Na2CO3+H2O+CO2

Explanation:

*Note, I'm assuming you forgot to add the H2O in your question, because the equation couldn't exist without it

Yes,  the pelvic bone support the intestines.

The pelvis, also known as the bony pelvis or the pelvic girdle, is a complex of bones that connects the trunk to the legs, supports and balances the trunk, and houses and supports the intestines, urinary bladder, and internal sex organs. It is also known as the "basin" or "bony pelvis" in human anatomy.

Major organs are located in the pelvic region, hidden by layers of muscles. The primary digestive organs, the intestines, are some of the most crucial. Bloating, constipation, or diarrhea, which are IBS symptoms, can cause pressure and pain in the pelvic area.

Therefore, yes the pelvic bone support the intestines.

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According to the solubility chart below  the solubility of Argon gas is not dependent on temperature.

The maximum amount of a chemical that will dissolve in a given amount of solvent at a given temperature is referred to as its solubility.

The solubilities of various compounds vary greatly, and this property of a particular solute-solvent pair is evident.

The addition of sugar cubes to a cup of tea or coffee serves as an example of a solution. A property that facilitates the dissolution of sugar molecules is solubility. Solubility is the property of a substance (solute) to dissolve in a certain solvent.

Solutes are divided into three categories: highly soluble, sparingly soluble, and insoluble based on the concentration at which they dissolve in a solvent.

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a)Elements that form hydrides by electrovalent binding are Sodium(Na), and Magnesium (Mg).

b)None of the elements is used to catalyze a chemical reaction and the elements that catalyze the reaction are platinum, cobalt, and iron.

c)Elements used in are radioactive dating  [tex]C^{14}[/tex]

d)The element which forms acid anhydride is phosphorous (P).

e)The element that exhibits both metallic and non-metallic behavior is Metalloids.

The tabular display of chemical elements is the periodic table, Which contains 18 periods and 7 groups.

All the elements are configurable in the S, P, D, and F blocks.

S and D block elements mostly contain metals, and P- block contains non-metals and Metalloids.

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Concentrated hcl has a specific gravity of 1.185 and is 36.5% w/w in hcl so 88 ml concentrated solution and in that add water

Here given data is concentrated hcl has a specific gravity of 1.185 and is 36.5% w/w in hcl and 88 ml concentrated solution  1.0 l of 0.050 m hcl would be prepared from the concentrated reagent because to make total 1 litre so we have to make total volume in that flask so to make total volume we have to take 88 ml of concentrated solution and add water to make a total of 1 litre to make 1.0 litre hcl add 88ml hcl concentrated solution and add water to make volume.

So, 1.0 l of 0.050 m hcl would be prepared from the concentrated reagent we have add water on it

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Answer: 3

Nucleon number is 31

Explanation:

We know that the equilibrium constant is a value that shows us the position to which the equilibrium position would switch when a constraint is imposed. We know that the imposition of a constraint would cause the equilibrium position to shift to the left or to the right in such a way that seeks to annul the change that is causing it.

We know that if a product is added, the equilibrium position would shift to the left and more reactants are produced. On the other hand, if a reactant is added, the equilibrium position would shift to the right and more products are added.

Having said this;

If we add the H3O^+ ion, then the equilibrium would shift to the left and if it is removed the equilibrium would shift to the right.

If we add the OH^- ion, the equilibrium would shift to the left and when it is removed the equilibrium would shift to the right.

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Answer:

C

Explanation:

A is a question

B is an opinion statement because it says "Florists put cut flowers in sugar longer, so flowers in sugar water stay fresh longer". When you can make a statement like that about anything.

C is a conclusion. It seems as if they already compared it and have came out with a 'conclusion'.

D. is an opinion.

The vapor pressure of the solution in question 3 at this temperature is

[tex]6.72[/tex] ×[tex]10^{-3}[/tex] torr.

The pressure that a vapor exerts on its condensed phases (solid or liquid) in a closed system at a specific temperature is referred to as the equilibrium vapor pressure (or vapour pressure in English-speaking nations other than the US; see spelling variations).

An indicator of a liquid's evaporation rate is the equilibrium vapor pressure. It has to do with how easily liquid-borne particles tend to elude detection (or a solid). Volatile is a term used to describe a chemical that, at room temperature, has a high vapor pressure.

Vapor pressure is the force that a vapor cloud exerts over a liquid surface. The kinetic energy of a liquid's molecules rises as its temperature climbs.

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Answer:

1 dollar

Explanation:

Melting (from solid to liquid), freezing (from liquid to solid), evaporation (from liquid to gas), and condensation are examples of matter transformations (changing from gas to a liquid).

Melting is the process by which a material transforms from its solid state into its liquid state. Freezing is the transition of a material from its liquid state into its solid state. Evaporation is the process by which a material transforms from its liquid state into its gaseous state. Melting is the process of converting a solid into a liquid. The melting point is the temperature at which a material transforms from a solid to a liquid. At 0 degrees Celsius, water melts.

Heat is applied in this pattern of solid to liquid to gas in order to cause the phase transition.

Condensation is the process by which a material transitions from its gaseous state into its liquid state. Sublimation is the process by which a solid transitions directly from its solid state to its gaseous state.

A physical transition from one state of matter to another, such as from solid to liquid or from liquid to gas, is referred to as a change of state, sometimes known as a phase change.

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The correct order that depicts the process of photosynthesis would be carbon dioxide + water ---> glucose (chemical energy) + oxygen.

Photosynthesis is a biological process whereby green plants are able to make use of solar radiation to convert inorganic substances in the form of water and carbon dioxide to carbohydrates.

In addition to carbohydrates, oxygen gas is produced as a by-product of the process. The process happens through a series of chemical reactions. Some reactions require light while some do not.

The entire process is summarised by the following equation:

[tex]6CO_2 + 6H_2O --- > C_6H_1_2O_6 + 6O_2[/tex]

The equation can be rewritten in word form as:

carbon dioxide + water ---> glucose (chemical energy) + oxygen

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Hi Steven!

So yet again, we find ourselves doing math when we thought the class was chemistry!  For this we're going to do a standard conversion that we do a lot in GenChem, converting from grams to moles.

In this case, we're starting with 0.171g N2O.  Let's go ahead and convert that to moles by using the molar mass, which is 44.013 g/mol.

.171 g N2O * (1 mol N2O / 44.013 g N2O) = 0.00389 mol N2O

So we got to moles of dinitrogen monoxide - now we need to know how many moles of nitrogen!  We see that there's a subscript of 2 after the N, meaning there are two moles of N for every mol of N2O.  You can think of it in terms of food -- for every 1 sandwich, there are two pieces of bread.

So let's multiply the number of moles of N2O by 2, to get moles of N!

.00389 mol N2O * ( 2 mol N / 1 mol N2O) = .00778 mol N!

Hope that helps :)

Using the density, the mass of sulfuric acid is 2292.82 grams.

We need to know about the density to solve this problem. Density is a unit that measures how dense an object is. Density can be measured by dividing mass by volume. It can be written as

ρ = m / V

where ρ is density, m is mass and V is volume

From the question above, we know that

ρ = 1.31 g/mL

V = 1 gallon = 4546.09 mL

% sulfuric acid = 38.5%

By substituting the following parameters, we get total mass

ρ = m / V

m = ρ .V

m = 1.31 . 4546.09

m = 5955.38 grams

Find the sulfuric acid mass

ms = %sulfuric acid x m

ms = 38.5% x 5955.38

ms = 2292.82 grams

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Explanation:

physical separation technique are based on physical properties of the substance

Answer:

Physical properties

Explanation:

Mixtures can be physically separated by using methods that use differences PHYSICAL PROPERTIES(boiling point, melting point, solubility in a given solvent,etc) to separate the components of the mixture, such as evaporation, distillation, filtration and chromatography.

The number of atoms per square centimeter in silicon

in the (100) = [tex]6.78[/tex] ×[tex]10^{14}[/tex] [tex]atoms/cm^2[/tex]

in the (110) = [tex]9.59[/tex] ×[tex]10^{14}[/tex] [tex]atoms/cm^2[/tex]

in the (111)  = [tex]7.83[/tex] × [tex]10^{14}[/tex] [tex]atoms/cm^2[/tex]

With the symbol Si and atomic number 14, silicon is a chemical element. It is a tetravalent metalloid and semiconductor that is crystalline, rigid, and brittle with a blue-gray metallic sheen. With carbon above it and germanium, tin, lead, and flerovium below it on the periodic table, it belongs to group 14. It rarely reacts, if at all.

Jöns Jakob Berzelius was able to prepare and characterize it for the first time in 1823, but this was delayed due to its high chemical affinity for oxygen. Silicates are a class of anions made up of its oxides. The only metalloid and nonmetal with melting and boiling points higher than its respective values of 1414 °C and 3265 °C is boron.

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At medium temperatures, between 50 and 68 degrees Fahrenheit, or

10 and 20 degrees Celsius, the photosynthetic enzymes work at their

optimum levels, so photosynthesis rates gauge high.

The photosynthetic enzymes typically operate at their best levels between 50 and 68 degrees Fahrenheit, and any significant departure from this range would slow down photosynthesis.

Despite an increase in the rate of carbon dioxide absorption into leaves at temperatures above 68 degrees Fahrenheit (20 degrees Celsius), the rate of photosynthesis decreases at these temperatures because the enzymes are less effective.

The shape and functionality of the photosynthetic enzymes are lost at temperatures above 104 degrees Fahrenheit (40 degrees Celsius), and the photosynthetic rate rapidly decreases.

Due to the ineffectiveness of the photosynthetic enzymes at low temperatures, specifically between 32 and 50 degrees Fahrenheit (0 and 10 degrees Celsius), the rate of photosynthetic reaction decreases.

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When the temperature is moderate (between 50 and 68 degrees Fahrenheit), the photosynthetic enzymes function at their peak between 10 and 20 degrees and the photosynthesis rates measure at their highest points.

As a result of the cells having to work harder to maintain a greater temperature, the amount of oxygen the cells require to function is also higher.

The temperature has an impact on photosynthesis's rate.

Photosynthesis occurs more quickly at higher temperatures. This is because the majority of chemical reactions are sped up by temperature and photosynthesis is a chemical reaction.

At 25C, oxygen synthesis is greatest. When the temperature is excessively high or low, oxygen generation decreases.

The negative connection between dissolved oxygen and temperature results in lower concentrations of dissolved oxygen.

Reduced dissolved oxygen levels occur as water temperature rises.

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Answer:

It is true.

Explanation:

Its a covalent bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that has a net charge that is not zero

The surface area of a square piece of paper has an edge measuring 7.06cm is 49.84 cm2

The surface area of an object is the total area of the object that it occupies. It can be measured by adding all the sides of the object.

The surface area of a square is

side x side

Given the sides of the square is 7.06 cm.

This is a square, so all squares have the same size sides. So by putting the values in the equation, we can occupy the surface area of the square.

7.06 x 7.06 = 49.84

Therefore, the surface area of a square piece of paper is 49.84 cm2

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The atomic radius of Magnesium (mg) that has an hcp crystal structure, a c/a ratio of 1. 624, and a density of 1. 74 g/cm3 is1.6×〖10〗^(-8) cm.

The number of atoms that are present in each unit cell of a specific hexagonally closed-packed crystal with six atoms is known as hexagonal closed packing, or HPC. It is written as

ρ=(n×A)/(V_c×N_A )

Where

ρ is the density

n is the number of atoms

N_A is Avogadro’s constant (6.023×〖10〗^23 atoms/mol)

A is the molar mass of magnesium (24,305g/mol)

V_c is the volume of the crystal

V_c   can be calculated using the expression below

V_c=(a^2 c×3√3)/2

a is the short crystal dimension (2R)

c is the long crystal dimension

1.624=c/a

c=1.624a

Putting the values in the above equation

V_c=(a^2×1.624a×3√3)/2

V_c=((2R)^2×1.624(2R)×3√3)/2

V_c=(4R^2×3.248R×3(1.73))/2

V_c=(67.428R^3)/2

V_c=33.71R^3  〖cm〗^3/(unit cell)

Substituting values into the density equation

ρ=(n×A)/(V_c×N_A )

1.74=(6×24.305)/(33.71R^3×6.023×〖10〗^23 )

Making R the subject of formula

R^3=145.83/(1.74×33.71×6.023×〖10〗^23 )

R^3=145.83/(3.53×〖10〗^25 )

R^3=4.127×〖10〗^(-24)

R=∛(4.127×〖10〗^(-24) )

R=1.6×〖10〗^(-8) cm

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The volume of the object is 8 cm³ and the density of the object is 3 g/cm³.

Archimedes' principle states when an object is partially or fully immersed in a fluid, it displaces the portion of the fluid equal to its own weight.

The volume of the object = volume of the water in the cylinder displaced

volume of the object = 30 cm³ - 22 cm³

volume of the object = 8 cm³

The density of the object is calculated from the ratio of the mass and volume of the object.

density = mass/volume

density of the object = 24 g / 8 cm³

density of the object = 3 g/cm³

Thus, the volume of the object is 8 cm³ and the density of the object is 3 g/cm³.

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As per given statement as follows:-

generally, independent variables are the one manipulated by investigators and study effects. Dependent variables are the measurements and observation by the data collected.

Experimental group are the participants exposed to the  independent variable and control group the participants treated same as experimental group but not  exposed to independent variables.

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The molar mass of camphor is 152 g/mol.

We have given that,

P = 12 torr or 0.01579 atm

1 atm = 760 torr

Density = 0.0829 g/l

R = 0.0821 L.atm/mol.K

And temperature is

T = 273° K + 80° K

  = 353° K

As we all know,

PV = nRT

so, PV = mass × R × T / molar mass

also, P = mass × R × T / volume × molar mass

here, mass/ volume = density (d)

P = dRT / molar mass

Now putting the values and simplify,

0.01579 = 0.0829 × 0.0821 × 353 / molar mass

molar mass = 152.156 g/mol.

thus, the molar mass of camphor is 152 g/mol.

The molar mass of a chemical substance is determined in chemistry by dividing the amount of a substance with that compound by the quantity of that compound, which is the number of moles in exactly that sample, which is measured or calculated in moles.

In contrast to molecular properties, a substance's molar mass is a bulk property. The compound is present in many different forms, each with a different mass as a result of the isotopes. The molar mass is the average of these masses.

The molar mass is often calculated using the standard atomic weights and is therefore an average for Earth and a function of the relative abundance of the constituent atoms' isotopes.

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Answer:

Explanation:de