a hot air balloon has a volume of 875L. what is the original temperature of the balloon if its volume changes to 955 L when heated to 56

Answer:

see explanation

Explanation:

An AX₂E₂ geometry is derived from an AX₄ parent geometry and is based upon 4 regions of electron density about the central element and defines a tetrahedral geometry and the geometry is bent angular.

An example is the water molecule (H₂O) with two covalent O - H bonds and two free pair electrons on the central oxygen element.

Answer:

sorry wala din akong sagot niyan sorry talaga

Answer:

Rb, Zn, P, S, F, Ca, Co, Cr

Rb, Zn, P, S, F, Ca, Co, Cr elements in order of decreasing metallic character.

The metallic character of an element is defined as the properties typical of metal, especially the tendency to lose electrons in chemical reactions.

Metallic character depends on the ability of an element to lose its outer valence electrons. Examples of properties related to metallic character include thermal and electrical conductivity, metallic lustre, hardness, ductility, and malleability. The most "metallic" element is francium, followed by caesium.

Hence, Rb, Zn, P, S, F, Ca, Co, and Cr elements in order of decreasing metallic character.

Learn more about the metallic character here:

https://brainly.com/question/25500824

#SPJ2

The mass of KCl that exists in 20.3 g of solution containing 1.14% by mass of KCl is 0.23 g

From the question given above, the following data were obtained:

Mass of solution = 20.3 g

Percentage of KCl = 1.14% = 1.14 / 100 = 0.0114

[tex]Percentage = \frac{mass of solute}{mass of solution} * 100\\\\0.0114 = \frac{mass of KCl}{20.3} \\\\[/tex]

Cross multiply

Mass of KCl = 0.0114 × 20.3

Therefore, the mass of KCl in the solution is 0.23 g

Learn more: https://brainly.com/question/14876861

The wavelength of the radio station broadcasting at 520 megahertz is 0.58m.

HOW TO CALCULATE WAVELENGTH:

λ = v/f

Where;

Learn more at: https://brainly.com/question/19601903?referrer=searchResults

Answer:

All zeros between other significant digits are significant. The number of significant figures is determined by starting with the leftmost non-zero digit. The leftmost non-zero digit is sometimes called the most significant digit or the most significant figure. For example, in the number 0.004205, the '4' is the most significant figure.

Explanation:

PA BRAINLIEST

HOPE ITS HELP

GOD BLESS

Answer:

it undergoes a chemical change

Answer:

b) Industrial farming

Explanation:

The term “industrial agriculture” refers to the type of farming which raises and cultivates large numbers of livestock and plants in high-density environments. It uses modern technology to promote faster growth and reduce illness and death rates in livestock, creating food products on a mass scale.

Answer: B.

Explanation

industrial agriculture

brainliest me

Answer:

they physical quantities that are uneffected by changes to a vector space basis

Answer:

The answer is 3

Explanation:

Hope this helps and have a wonderful day.

In the first case, the molarity of oxygen gas is 0.0012 mol/L. In the second case, the molarity of oxygen gas is 0.0052 mol/L .

We have to obtain the number of moles of oxygen as follows;

P = 1.00 atm

V = 28.31 mL or 0.02831 L

n = ?

R = 0.082 atm LK-1mol-1

T = 25 °C + 273 = 298 K

n = PV/RT

n=  1.00 atm × 0.02831 L/ 0.082 atm LK-1mol-1 ×  298 K

n = 0.0012 moles

Molarity = Number of moles/Volume = 0.0012 moles/1.00 L =  0.0012 mol/L

For the second case;

P = 4.47 atm

V = 28.31 mL or 0.02831 L

n = ?

R =  0.082 atm LK-1mol-1

T = 25 °C + 273 = 298 K

n = PV/RT

n = 4.47 atm ×  0.02831 L/0.082 atm LK-1mol-1 × 298 K

n = 0.1265/24.436

n = 0.0052 moles

Molarity of oxygen = 0.0052 moles/1.00 L = 0.0052 mol/L

Learn more: https://brainly.com/question/2510654

Answer:

Stoichiometric Calculation:

3 NO₂(g) + H₂O (l) → 2 HNO₃(g) + NO(g)

2 moles of HNO₃ is produced from 3 moles of NO₂.

Therefore, By unitary method:

2.30 moles of HNO₃ produced from the moles of NO₂ = [tex] \dfrac{3}{2} \times 2.30 = \bf{3.45 mol}[/tex]

The number of moles of NO₂ that would be required to produce 2.30 moles of HNO₃ in the presence of excess water in the chemical reaction is 3.45 moles

The balance equation is as follows:

3NO₂(g) + H₂O (l) → 2HNO₃(g) + NO(g)

Water molecules is in excess. Therefore, the limiting reagent is Dinitrogen oxide.

The limiting reagent will determine the amount of product produced.

Therefore,

2 moles of HNO₃ needs 3 moles of NO₂

2.30 moles of HNO₃ will need ? moles of NO₂

cross multiply

number of moles of NO₂  = 2.30 × 3 / 2

number of moles of NO₂  = 6.9 / 2

number of moles of NO₂  = 3.45 moles

learn more: https://brainly.com/question/25450438?referrer=searchResults

Answer:

cpd 2

Explanation:

aldehyde is such a cpd which contains an alkyle gp with the formula R-CH=O

Functional group can be interconverted into each other by the means of suitable reagent. Functional group are responsible for the chemical and physical properties of a compound. Therefore the correct option is option 2 that is having group  R-CHO.

A group of atoms forming a component of a molecule that accounts for a particular function or chemical behavior is called a functional group. There are so many functional group in organic chemistry.

The list of functional groups with their corresponding formulas can be given as

Carboxylic group COOH

Alcoholic group OH

Ammine group NH₂

Ketonic group R-CO_R

Aldehydic group R-CHO

Thiol group R-S-H

Cyanide group -CN

Therefore the correct option is option 2 that is having group  R-CHO.

To know more about functional group, here:

https://brainly.com/question/14618322

#SPJ2

Answer:

The water would stand at a height of 1033.6 cm

If the mass of the mercury, m equals the mass of the water, m' at its height,h', then the weight of the mercury W equals the weight of the water, W'

So, W = W'

mg = m'g

ρV = ρ'V' where ρ = density of mercury = 13.60 g/cm³, V = volume of mercury = Ah where A = cross-sectional area of tube = 1.00 cm and h = height of mercury = 76.0 cm, ρ' = density of water = 1.00 g/cm³, V = volume of water = Ah' where A = cross-sectional area of tube = 1.00 cm and h' = height of water.

So, ρV = ρ'V'

ρAh = ρ'Ah'

h' = ρAh/ρ'A

h' = ρh/ρ'

Substituting the values of the variables into the equation, we have

h' = ρh/ρ'

h' = 13.60 g/cm³ × 76.0 cm/1.00 g/cm³

h' = 13.60 × 76.0 cm

h' = 1033.6 cm

So, the water would stand at a height of 1033.6 cm

Learn more about water height here:

https://brainly.com/question/15415820

In this case, according to the Raoult's law, we can find the mole fraction of 79 wt% benzene and 21 wt% toluene at 50 °C in the vapor phase as follows:

[tex]y_iP=x_iP_i[/tex]

However, we first have to calculate the mole fractions in the solution as follows (b stands for benzene and t for toluene):

[tex]\\x_b=0.79\frac{g\ benzene}{g\ solution} *\frac{(78.11*x_b+92.14*x_t)}{1mol\ solution} *\frac{1mol\ toluene}{78.11g\ toluene} \\\\x_b=0.79\frac{g\ benzene}{g\ solution} *\frac{78.11*x_b+92.14*(1-x_b)}{1mol\ solution} *\frac{1mol\ toluene}{78.11g\ toluene}\\\\x_b=0.79*(x_b+1.18*(1-x_b))\\\\x_b=0.79x_b+0.932-0.932x_b\\\\x_b=\frac{0.932}{1+0.932-0.79} =0.816\\\\x_t=1-x_b=1-0.816=0.184[/tex]

Next, we calculate the total pressure as follows, according to the Dalton's law:

[tex]P=x_bP_b+x_tP_t=0.816*271mmHg+0.184*91.5mmHg=237.972mmHg[/tex]

Finally, the mole fractions of the vapor phase turn out:

[tex]y_b=\frac{0.816*271mmHg}{237.972mmHg}=0.929\\\\y_t=1- 0.929=0.071[/tex]

Learn more:

Answer:

The meaning of this principle is building-up.

Explanation:

The Aufbau principle asserts that electrons occupy lower-energy atomic orbitals before filling higher-energy ones (Aufbau is German for "building-up") (Aufbau is German for "building-up"). By using this method, we may forecast the electron configurations for atoms or ions.

Answer:

if the cell grows beyond a certain limit, not enough material  will be able to cross the membrane fast enough to sustain the increased cellular volume

Answer: In most cells, this passage of all materials in and out of the cell must occur through the plasma membrane



Explanation:

Answer:

Refer to the attachments!!

Explanation:

Answer:

2 MOLES OF GLUCOSE

Explanation:

How many Moles of glucose are produced from 12 moles of CO2 in photosynthesis?

6CO2 +6H20-------------->C6H12O6 -+ 6O20

(IN THE PRESENCE OF CHLOROPHYLL AND UV FROM )

)

6 MOLES OF CO2 MAKE 1 MOLE OF GLUCOSE

12 MOLES THEN MAKE 2 MOLES OF GLUCOSE

In the photosynthesis process, plants can use 12 moles of carbon dioxide to form 2 moles of glucose.

It is the process by which green plants and some other organisms convert light energy into chemical energy.

Let's consider the balanced equation for the synthesis of glucose through photosynthesis.

6 CO₂ + 6 H₂O ⇒ C₆H₁₂O₆ + 6 O₂

The molar ratio of CO₂ to C₆H₁₂O₆ is 6:1. The moles of glucose formed from 12 moles of carbon dioxide are:

12 mol CO₂  (1 mol C₆H₁₂O₆/6 mol CO₂) = 2 mol C₆H₁₂O₆

In the photosynthesis process, plants can use 12 moles of carbon dioxide to form 2 moles of glucose.

Learn more about photosynthesis here: https://brainly.com/question/3529377

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

The Correct choice is~ B

The elements shown in green boxes are ~ Metalloids

Answer:

it may lead to read false measurements

while in an experiment.

that's what I think.

Answer:

it doesn't house the sweat and oil glands

Explanation:

the epidermis doesn't house the oil and sweat glands but the dermis does

Answer:

HBr

Explanation:

HBr (Hydrogen Bromide) is a polar molecule because of the unequal electronegativities of Hydrogen and Bromine atoms. Bromine has a higher electronegativity than hydrogen due to which electron bonded pair gets attracted slightly more towards bromine atom making HBr a polar molecule and resulting in a net dipole moment.

Answer:

D: Kinetic Energy​

Explanation:

Temperature is a measure of kinetic energy. Temperature is a measure of the average kinetic energy of the particles in an object. When temperature increases, the motion of these particles also increases.

Hope this helps :)

Answer: A

Explanation:

A saturated solution is a chemical solution that contains the highest bound solvent level. In a saturated solution, the extra solution will not dissolve. Depending on a multitude of variables, the quantity of fluid that can we can add in a solvent to create a saturated solution.

Answer:

2 moles of C and no more

Explanation:

Consider the following reaction: 2A + 3B --> 2C If you have 2 moles of A and 6 moles of B, what is the maximum number of moles of C that can be made by the reaction

2A + 3B --> 2C '

2 of A make 2 of C if we have atleast 3 of B.

we ave more than enough B

2 of A will make 2 moles of C and no more

Answer:

i k ow its not the exact anwser but ih ope this helps

Explanation:

Energy plays a key role in chemical processes. According to the modern view of chemical reactions, bonds between atoms in the reactants must be broken, and the atoms or pieces of molecules are reassembled into products by forming new bonds. Energy is absorbed to break bonds, and energy is evolved as bonds are made. In some reactions the energy required to break bonds is larger than the energy evolved on making new bonds, and the net result is the absorption of energy. Such a reaction is said to be endothermic if the energy is in the form of heat. The opposite of endothermic is exothermic; in an exothermic reaction, energy as heat is evolved. The more general terms exoergic (energy evolved) and endoergic (energy required) are used when forms of energy other than heat are involved.

A great many common reactions are exothermic. The formation of compounds from the constituent elements is almost always exothermic. Formation of water from molecular hydrogen and oxygen and the formation of a metal oxide such as calcium oxide (CaO) from calcium metal and oxygen gas are examples. Among widely recognizable exothermic reactions is the combustion of fuels (such as the reaction of methane with oxygen mentioned previously).

The alcohol content is 450 proof

In the given example, the measurement of the alcohol content is said to be measured in alcohol proof.

We are going to multiply the given proof of the alcohol with the vodka drink divided by 100 to determine the content of alcohol in the alcoholic beverage.

i.e.

= (750 × 60)/100 proof

= 450 proof

Learn more about measurement here:

https://brainly.com/question/2384956?referrer=searchResults

Answer:

Use the Rydberg Equation 1/λ = R(1/n²(final) - 1/n²(initial) where R = 109,678 cm⁻¹. Substitute initial orbital number and final orbital number and solve for wavelength (λ).

Explanation:

Example:

Assume an electron transition from n = 5 to n = 2.

1/λ = 109,678cm⁻¹(1/2² - 1/5²) = 109,678(0.25 - 0.04)cm⁻¹ = 23,032cm⁻¹

λ = 1/23,032cm⁻¹ = 4.34 x 10⁻⁵cm x 10⁻²m/cm x 10⁹nm/m = 434nm