pls i have a chemistry test answers asap :'( ​

Awnser your loooking fo its got to be aluminium

Explanation:i took the dang subgect

Answer:

There are 9.8 ×1021. formula units in 10,005.8gCaO 

Answer:

Charle's Law ... V ∝ f(T); Pressure and Mass remain constant

Explanation:

Charle's Law is one of the empirical gas laws relating the effect of temperature on volume of a gas while pressure and mass (moles) of substance remain constant. Basically, Charle's Law states that the change in volume associated with a confined mass or gas is directly proportional to the applied temperature.

For a directly proportional relationship between Volume (V) and Temperature (T) the empirical formula is written V ∝ T. This is then set in equation form by including a 'proportionality constant' giving V = k·T. In applications, problems generally provide 'initial' Temperature (T₁) and Volume (V₁) along with a final Temperature (T₂) or final Volume (V₂) and asked to calculate the unknown variable. The Charle's Law relationship detailing this is derived as follows:

V = k·T => k = V/T

The k-value is constant for both the initial and final conditions such that...

k₁ = k₂ => V₁/T₁ = V₂/T₂

Example: Assume a gas volume of 25 liters at 25°C, what would be the gas volume if cooled to 0°C?

Set-up a data table

V₁ = 25L     & V₂ = ?

T₁ = 25°C   & T₂ = 0°C => these values need to be converted to Kelvin Temps so as to avoid division by '0'. So...

T₁ = (25 + 273)K = 298K     &     T₂ = (0 + 273)K = 273K

Substituting into V₁/T₁ = V₂/T₂ and solving for V₂ provides the new volume.

25L/298K = V₂/273K => V₂ = (25L)(273K)/(298K) = 22.9L ≅ 23L (2 sig. figs.)

Generally, to check work, examine the change in volume relative to the change in temperature. For a direct proportionality a decrease in temperature as in the example would give a decrease in volume consistent with Charle's Law. Note that 273K/298K  times  25L gives a smaller resulting volume value. If one applies '298K/273K' times the 25L,  a larger value would result and is inconsistent with Charle's Law.  

Answer:

a) distance is 4+7+1+8=20 blocks

b) displacement is 10 blocks

Explanation:

find displacement: x and y

x axis displacement = 4-1 = 3 blocks

y axis displacement = -7+8= 1 block

displacement = the square root of 3^2 + 1^2

= 9+1 = 10 blocks.

You can find the angle of displacement with respect to the initial position using trig identities, if you wish.

Answer:

sorry but i am doing this for point

Explanation:

how do I complete this column graph of the number of conduct vs the number of

The noble gas configuration of vanadium (V), atomic number 23 will be [Ar] 3d34s2.

The electron configuration of noble gases would be known as that of the noble gas configuration. The propensity of chemical elements to gain stability forms the foundation of all chemical reactions. Chemical formation frequently leads to an entire electronic configuration approximating a noble gas for several main group elements.

The atomic number of V = 23

The noble gas configuration = [Ar] [tex]3d^{3} 4s^{2}[/tex].

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Answer:

[Ar] 3d3 4s2

Explanation:

[Ar] 3d3 4s2

Answer:

When one object uses force to move the other.

Explanation:

This is called Thrust.Thrust is used in airplane engines,or an engine can be  a source of Thrust,we use our legs to Thrust us forward when we walk!

Sir Isaac Newton's third law explains that for every action, or force, in nature, there is an equal and opposite reaction.

Hope that helps!

Answer:

crystallization

Explanation:

When 490g of sugar is dissolved completely in water at a high temperature ( 100°C ) and the solution is been cooled to a lower temperature ( 20°C ), The dissolved sugar in the solution will start to crystallize, This is because the solubility of sugar in water decreases with a decrease in temperature of water.

Explanation:

Flow-duration data are daily mean flow values measured over a specified time interval that have been exceeded various percentages of the specified time interval.

Water is a very flexible material. It can flow in many different directions and shapes. This flexibility makes it great for many different purposes, such as drinking, washing, and irrigation. Water is considered to be a flexible substance because it can change its shape according to space.

Water is a liquid at standard temperature and pressure (25 degrees Celsius and 1 atm, for liquids).

Water is is tasteless and odorless.

Water is transparent in the visible part of the electromagnetic spectrum.

Water can act as either an acid or a base.

Water is a universal solvent, dissolving many substances found in nature.

Water is the most abundant compound on Earth’s surface. In nature, water exists in the liquid, solid, and gaseous states. It is in dynamic equilibrium between the liquid and gas states at 0 degrees Celsius and 1 atm of pressure. At room temperature (approximately 25 degrees Celsius), it is a tasteless, odorless, and colorless liquid. Many substances dissolve in water, and it is commonly referred to as the universal solvent.

Therefore, Water is a very flexible material. It can flow in many different directions and shapes. This flexibility makes it great for many different purposes, such as drinking, washing, and irrigation. Water is considered to be a flexible substance because it can change its shape according to space.

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Answer:

golgi apparatus

Explanation:

Answer:

vacuole

Explanation:

the answer is vacuole im pretty sure!

Answer:

6 mols H2 are needed

Explanation:

N2 = 28.01g/mol

H2 = 2.02g/mol

[tex]\frac{2 mol N_{2} }{1}[/tex] * [tex]\frac{3 mol H_{2} }{ 1 mol N_{2} }[/tex] = 6 mol H2

Answer:

 310.1 J/mol * K

Explanation:

since entropy increases with increasing molecular complexity The Value of s ( entropy ) for Butane, C4H10 will be

= 310.1 J/mol * K

Given that :

Methane ( CH4 ) = 186.3 J/mol*K

Ethane ( C2H6 ) = 229.6 J/mol*K

propane ( C3H8 ) = 270.3 J/mol*k

Answer:

equal to - it's opposite but equal energy is the third law

Answer:

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. (That should give you the answer if you read closely first sentence)

Answer:

The law of floatation is applied in all vessels which travel by waterways that include ships, submarines and ferry boats. It is also applied in some vessels which travel by air ways such as hot air balloon and air ship. Balloons of different colors and shapes are filled with lighter gas so that will float in air.

Answer:

*hot air balloon

*swimming

Explanation:

sna makatulong po:)

Answer: The empirical formula is [tex]CaS[/tex]

Explanation:

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mass of Ca= 55.6 g

Mass of S = 44.4 g  

Step 1 : convert given masses into moles.

Moles of Ca =[tex]\frac{\text{ given mass of Ca}}{\text{ molar mass of Ca}}= \frac{55.6g}{40.08g/mole}=1.38moles[/tex]

Moles of S =[tex]\frac{\text{ given mass of S}}{\text{ molar mass of S}}= \frac{44.4g}{32.06g/mole}=1.38moles[/tex]

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For Ca = [tex]\frac{1.38}{1.38}=1[/tex]

For S = [tex]\frac{1.38}{1.38}=1[/tex]  

The ratio of Ca : S =  1:1  

Hence the empirical formula is [tex]CaS[/tex]

Answer:

carbonic acid in water dissolving limestone

hope this ans helps

have a great day

The correct option is option D. The water and metal will adjust to the same temperature between 10°C and 120°C.

In nature, everything always flows from high to low because of the presence of a gradient.

Temperature simply gives the degree of hotness of a body. More the temperature of a body, more the heat/heat energy it possesses.

Since the temperature of the metal object is high, it has more heat energy as compared to water which is at a lower temperature.

Therefore, when the metal object and water comes in contact, the heat flows from the metal to the water. As the object is losing heat, it's temperature reduces and since the heat is flowing to the water, it's temperature rises.

There will come a point where the temperature of both, the metal object as well as water will become constant. At this stage the flow of heat will stop as there's no difference in their temperatures.

Therefore, the correct option is option D. The water and metal will adjust to the same temperature between 10°C and 120°C.

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Answer:

a metal is an element that readily forms positive ions (cations) and has metallic bonds

coke is a strong stimulant made from coca leaves

Answer: First Scientific method

Second: question

Third: research

Fourth: hypothesis

Fifth: experiment

Sixth: procedure

Seventh: variable

Eighth: observe

Ninth: interpret

Tenth: record

Eleventh: ethical

Twelfth: conclusion

Explanation: That is the order that the words in the box go in. Hope this helps!

Answer:

b. d. f. h

Explanation:

Anions are negatively charged. They are usually non metals with few exceptions. They need to gain electrons in order to form and they are always listed after cation in a compound.

Answer:

Welcome

Explanation:

10 - 7.93 = 2.07 g of H2O

2.07 g / 18.015 g/mol = 0.1149 mol of H2O

7.93 g / 138.204 g/mol = 0.057379 mol of K2CO3

0.1149 mol / 0.057379 mol = 2

Answer:In regards to writing the formula, we know that magnesium has a charge of 1+ and sulfate, SO4, has a charge of 1-. Sulfate is a polyatomic ion so the charge of the whole thing is (SO4)1-. When you combine them you end up with MgSO4 and the "heptahydrate" is seven water molecules.

Explanation:

Answer:

Iduno sorry po hsjsnaka

Explanation:

"pure water does not conduct electricity. But some tap water probably can."

The reason why pure water does not conduct electricity is due to the absence of mineral and metal containing salts. Pure water is made up of only Hydrogen and oxygen atom as represented by the formula; H2O

Tap water on the other hand are most likely able to conduct electricity due to the presence of these ions. They may arise from impurities or during treatment processes.

The correct options are;

b . Pure water is H2O

c . Some tap water has minerals, such as iron in it.

Answer:

cell wall and chloroplasts

Explanation:

Answer:

yEs

Explanation:

Answer:

C

Explanation:

When a line segment and a plane intersect, they intersect at a point. They both coincide on point C