Answer:
equal to - it's opposite but equal energy is the third law
what evidence is there in the diagrams to support the classification of these substances as elements
Awnser your loooking fo its got to be aluminium
Explanation:i took the dang subgect
How many formula units are in 9.8 grams of calcium hydroxide?
Answer:
There are 9.8 ×1021. formula units in 10,005.8gCaO
What might happen if 490 g of sugar is dissolved in water at 100°C and then the water cools to 20°C?
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.
What is the application of flotation
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:)
MgSO4 x 7H2O:
How
many molecules of
water are present
per magnesium
sulphate formulation
unit
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
Using the diagram , what is the intersection of plan ABCD and GC?
Answer:
C
Explanation:
When a line segment and a plane intersect, they intersect at a point. They both coincide on point C
What might you expect for the value of S∘ (entropy) for butane, C4H10?
Entropies provided (Hint: entropy increases with increasing molecular complexity):
- CH4=186.3(J/mol*K)
-C2H6=229.6(J/mol*K)
-C2H8=270.3(J/mol*K)
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
A heated metal object measures 120⁰C. It is dropped into a small bucket filled with water that is 10⁰C. Which of the following is the most likely to occur
A-Both the water and the metal will adjust to the same temperature below 10⁰C.
B-The water and metal will adjust to different temperatures above 120⁰C.
C-The water will remain the same temperature, but the metal will cool to 10⁰C.
D-The water and metal will adjust to the same temperature between 10⁰C and 120⁰C
The correct option is option D. The water and metal will adjust to the same temperature between 10°C and 120°C.
How does heat flow ?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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Someone help please! Extra points & brainlest!
Answer:
golgi apparatus
Explanation:
Answer:
vacuole
Explanation:
the answer is vacuole im pretty sure!
Beth has two unlabeled balloons, one filled with hydrogen gas and the second filled with neon gas. She researches and writes down the density of hydrogen and neon. Beth also has several chambers filled with various gases and a poster showing the densities of these gases. She has no other materials or tools available to her to help her identify the element in each balloon.The poster and Beth’s data are shown.
Can someone plzzzzz helppppp me plzzzzzz( and don’t tell me to click a link it doesn’t work)
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!
Explain the flexibility and the flow characteristics 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.
What are the characteristics of water?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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El ozono es una sustancia pura cuya molécula está formada por tres átomos de oxígeno, O3. Se encuentra en pequeñas cantidades en la estratosfera formando una ligera capa alrededor de la tierra. El ozono es un filtro para ciertas radiaciones como los rayos ultravioleta que provienen del sol y son muy perjudiciales. Desde hace varias décadas se ha observado una disminución de O3 en el polo sur y comienza a disminuir en el polo norte formando un agujero en esta capa. Qué consecuencias trae para los seres vivos la destrucción de la capa de ozono y cómo podría revertirse este deterioro en dicha capa?
Answer and Explanation:
Dado que la capa de ozono protege la vida en la Tierra actuando como filtro de radiaciones nocivas del Sol, su destrucción trae como consecuencia un aumento de la radiacion UV que puede provocar:
- daños en animales y en el hombre: aumento de casos de cáncer de piel, cataratas en ojos, debilitamiento del sistema inmune.
- alteración en el desarrollo de especies vegetales .
- contribución al efecto invernadero y al calentamiento global.
Para revertir el deterioro de la capa de ozono, podemos tomar algunas medidas:
- no utilizar productos que contengan clorofluorocarbonos (CFC), como por ejemplo algunos aerosoles.
- evitar el uso de productos que contengan halones
- evitar el uso de hidrofluorcarbonos (HFCF)
Estos compuestos químicos reaccionan y destruyen el ozono, por lo que si evitamos utilizarlos, con el tiempo la capa de ozono se recuperará.
I went for a walk the other day. I went four blocks east, then seven blocks south, then one block west and finally
eight blocks north
a.What distance did I travel?
b. What's my displacement?
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.
Which is an example of mechanical weathering?
Answer:
carbonic acid in water dissolving limestone
hope this ans helps
have a great day
Many animals influence and contribute to ecosystem services. As pollinators, how do butterflies ultimately contribute to direct ecosystem services?
Answer:
yEs
Explanation:
Identifying Cell Structures
Which structures are found in plant colls, but not in animal cells? Check all that apply
)
coll wall
coll membrane
chloroplasts
O lysosomes
ribosomes
vacuoles
Answer:
cell wall and chloroplasts
Explanation:
Newtons third law explains what happens when two objects-
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!
N2-3H2 → 2NH3
How many moles of hydrogen, H2, are needed
to react with 2.0 moles of nitrogen, N2?
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
Give the noble gas configuration of vanadium (V), atomic number 23
The noble gas configuration of vanadium (V), atomic number 23 will be [Ar] 3d34s2.
What is noble gas configuration ?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
A hydrate of potassium carbonate has the formula K2CO3•x H20, where x represents the
number of water molecules in the formula A 10.00 g sample of the hydrate is heated, and after
the water evaporates, the anhydrous salt (salt without water) has a mass of 7.93 g.
a Calculate the mass of water in the hydrate
b. Calculate the percent of water in this hydrate?
c. Determine the formula of the hydrate SHOW YOUR WORK PLEASE
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
Temperature is a measurement of :
1) total energy in a system
2) the average kinetic energy of a system
3) the average potential energy of a system
4) the ability to do work
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)
What is metal ? Where does it coke from ?
Answer:
Most pure metals, like aluminium, silver and copper, come from the Earth's crust. They are found in ores – solid materials called minerals, usually occurring in rock, from which the pure metal has to be extracted. The properties of pure metals can be improved by mixing them with other metals to make alloys.a metal is an element that readily forms positive ions (cations) and has metallic bonds
coke is a strong stimulant made from coca leaves
What is the formula of the compound between calcium and sulfur that has the percent composition 55.6% (by mass) calcium and 44.4% (by mass) sulfur? What is the formula of the compound between calcium and sulfur that has the percent composition 55.6% (by mass) calcium and 44.4% (by mass) sulfur? Ca2S4 CaS Ca2S CaS4 CaS2 Request
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]
Use the following reaction:
2KCIO, -> 2KCI + 302
If 5.00 g of KClo, is decomposed, how many grams of o, is produced?
A. 0.0612 grams 02
B. 0.979 grams 02
C. 1.96 grams 02
D. 5.88 grams 02
how do I complete this column graph of the number of conductors vs the number of insulators
the Conductors are:
carbon,iron nail, aluminium foil, copper wire
the Insulators are:
Paddle pop stick
plastic spoon
and please explain how to do it
it's due this Friday the 26th
it is a Science
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
Can someone help with this question I will big BRAINLEST quick thank you
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.
"pure water does not conduct electricity. But some tap water probably can. Which best explains this?" a . Tap water is H20 b . Pure water is H20 c . Some tap water has minerals, such as iron in it.
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.
Circle all that apply for an anion.
a. Positively charged
b. Negatively charged
c. Metal
d. Nonmetal
e. Loses electrons when formed
f. Gains electrons when formed
g. Listed first in a compound
h. Listed second in a compound
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.
Help please because why not