Answer: c (the amount of empty space between the water particles will decrease)
Explanation: i got it right:)
FeO+ PdF2 ---> FeF2+PdO balance please worth 50 points
Answer: FeO
Explanation:
Answer:
This is not worth 50 points liar
Explanation:
Select the correct answer.
Which equation correctly relates kinetic energy, mass, and velocity?
OA. KE=3m22
OB. KE = mv2
Oc. KE=mu
OD. KE = mv3
Answer:
Ke1/2mv2
Explanation:
Hope this helps
Answer:
KE 1/2 MV2
ExplanationExplanationExplanationExplanation: hope this helps
QUE CONTIENE EL CROMO QUE SE UTLIZA EN LAS TINTURAS PARA TATUAJES
Answer:
Hexavalent chromium
Explanation:
consider the reaction between acetylene C2H2 and oxygen in a welding torch 2C2H2 + 5O2 = 4CO2 + 2H2O of 5.4 moles of acetylene react with sufficient oxygen how many grams of CO2 should form
Answer:
C. 4.8*10² g.
Explanation:
1. What is a wave?
a.) a vibrating disturbance that transfers energy from place to place
b.) a material which a wave travels through
c.) an area where coils spread out
d.) the maximum distance a medium moves from its rest position
Answer:
A.
Explanation:
A wave is a disturbance that moves energy from one place to another. Only energy — not matter — is transferred as a wave moves. The substance that a wave moves through is called the medium. That medium moves back and forth repeatedly, returning to its original position. But the wave travels along the medium
Which property of an ice cube will stay the same after the ice cube is melted?
A. Shape
B. Physical state
C. Mass
D. Texture
Answer:
C. Mass
Explanation:
Use scientific notation to express the number 355000 to:
1) one significant figure
2) two significant figures
3) three significant figures
4) four significant figures
5) six significant figures
Answer:
1) 4*10^5
2) 3.6*10^5
3) 3.55*10^5
4) 3.550*10^5
5) 3.55000*10^5
Explanation:
1) 4 x [tex]10^5[/tex]
2) 3.6 x [tex]10^5[/tex]
3) 3.55 x [tex]10^5[/tex]
4) 3.550 x [tex]10^5[/tex]
5) 3.55000 x [tex]10^5[/tex]
What is scientific notation?A number is written in scientific notation when there is a number greater than or equal to 1 1 11 but less than 10 10 1010 multiplied by a power of 10 10.
Significant figures are the number of digits in a value, often a measurement, that contributes to the degree of accuracy of the value.
1) 4 x [tex]10^5[/tex]
2) 3.6 x [tex]10^5[/tex]
3) 3.55 x [tex]10^5[/tex]
4) 3.550 x [tex]10^5[/tex]
5) 3.55000 x [tex]10^5[/tex]
Learn more about scientific notation here:
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Question in picture plsss help
Answer:
2nd answer is correct. Hope it helped you!
Andesitic rock is an igneous rock with a composition in between that of basaltic and granitic igneous rock.
true or false
Answer:
Explanation:
intristing
Plzzzz help right answer gets a brainly!
Answer: 4
Explanation: Your counting 4 for each interval. 9+4 =13 13+4 =17 17+4 =21 and so on.
In the original mixtures, test tube 1 contained magnesium and a zinc compound, and test tube 2 contained zinc
and a magnesium compound. A similar relationship exists between test tubes 3 and 4 and between test tubes 5
and 6. Compare what took place in each corresponding pair of test tubes. What general conclusion can you draw?
Answer:
Magnesium in tube 3 and copper in tube 5 became compounds
If each of the test tubes contained a less reactive compound and a more reactive element or less reactive element and more reactive compound , in first case chemical change of displacement reaction will occur while in second case no reaction will occur as zinc exists as an element.
What is chemical change?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical changes:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
Learn more about chemical change,here:
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If a cell has waste it needs to store, it will store it:
Answer:
The vacuole is the storage area of the cell. Most cells have one large vacuole. Vacuoles store food and other materials needed by the cell. They can also store waste products.
Explanation:
Match the definition with the correct term: 1/12th the mass of a carbon-12 atom.
Answer:
hydrogen atom but see the note below.
Explanation:
This is either the most common hydrogen ion or a hydrogen atom. It cannot be either of hydrogen's isotopes.
please help this makes no sense to me!!
Answer:
potassium nitrate= KNO3 ---> KNO2 + O2 and a gas evolution reaction
Explanation:
i think
Which of the following processes occurs when wind and water move weathered and eroded pieces away from rock? *
A. Cementation
B: Deposition
C: Transportation
D: Consolidation
Answer:
lemme guess is it transportation??
Why is it possible for an active metal like aluminum to be useful as a structural metal?
Answer:
Aluminum even after being an active metal is used as a structural metal due to its toughness, high strength, lightweight, and resistance to the process of corrosion. It is resistant to corrosion as its reactivity gets suppressed due to the formation of an aluminum oxide film which is protective in nature, on its surface. Passivation is the term for the formation of the protective coating.
Two descriptions about physical quantities are given below:
Quantity A: It is a force.
Quantity B: It changes when the object travels from Earth to Earth's moon.
What quantities are these most likely describing?
Select one:
a. Both Quantity A and Quantity B are mass.
b. Both Quantity A and Quantity B are weight.
c. Quantity A is weight and Quantity B is mass.
d. Quantity A is mass and Quantity B is weight.
Answer:
[tex]\huge\boxed{\sf Option \ B}[/tex]
Explanation:
=> Weight is an attractive force which is exerted on any body.
=> It changes when the object's place changes as it depends upon the acceleration due to gravity ( g = 9.8 m/s ) which changes as we move from place to place.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AnonymousHelper1807is this right or wrong ? pls help rn
your answer is correct good luckk!!!:)
What are homogeneous mixture and heterogeneous mixture ?
Explanation:
"A homogeneous mixture has the same proportions of its components throughout any given sample and is also referred to as a solution. Conversely, a heterogeneous mixture has components of which proportions vary throughout the sample."
- Wikipedia
An atom of which element has the strongest attraction for the electrons in a bond?
a. aluminum
b. carbon
c. chlorine
d. lithium
Answer:
chlorine
Explanation:
This is because the electronegativity increases from left to right and decreases from top to bottom of the periodic table.
what are 4 sources of electrical energy?
Answer:
Clean Energy. Learn more about energy from solar, wind, water, geothermal, biomass and nuclear. Fossil. Learn more about our fossil energy sources: coal, oil and natural gas.Electric Power. Learn more about how we use electricity as an energy source. Energy Storage. Hydrogen & Fuel Cells.Explanation:
I hope this helps xD
Answer:
Electrical energy is used to power up a light bulb. The current moves from the outlet to the light bulb through the wire.
Lightning is another example of electrical energy. The negatively charged particles are separated from the positively...
Batteries are also sources of electrical energy. In car batteries, the moving charges Explanation:
fI gave u 3 think of the 4th one
The phase change between white tin and gray tin is difficult to observe directly. Both substances can be burned, however. From these equations, calculate AHⓇ for the conversion of gray tin into white tin:
Sn(s, white) + O2(g) + SnO2(g) AH = -580.69 kJ
Sn(s, gray) + O2(g) + SnO2(g) AH° = -582.78 kJ
AH = _________ kJ
Answer: Thus [tex]\Delta H[/tex] for the conversion of gray tin to white tin is -20.9 kJ
Explanation:
According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.
According to this law, enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.
The final reaction is
[tex]Sn(s, gray)\rightarrow Sn(s, white)[/tex] [tex]\Delta H=?[/tex]
The intermediate balanced chemical reaction will be,
[tex]Sn(s, gray)+O_2(g)\rightarrow SnO_2(g)[/tex] [tex]\Delta H^0=-582.78kJ[/tex] (1)
[tex]Sn(s, white)+O_2(g)\rightarrow SnO_2(g)[/tex] [tex]\Delta H^0=-580.69kJ[/tex] (2)
substarcting (2) form (1) we get
[tex]\Delta H=\Delta H_1-\Delta H_2[/tex]
[tex]\Delta H=-582.78-(-580.69kJ)[/tex]
[tex]\Delta H=-20.9kJ[/tex]
List three things, other than the name, symbol, atomic number, and average atomic mass, you can discover about an element using the periodic table in Figure 6.9.
Answer: State of matter, Subcategory in the metal-metalloid-nonmetal trend, and electrons per shell.
Explanation:
Who asked the question “can you split matter forever?”
Answer:
Of course, what we today call atoms can be divided into more elementary particles, but not that many.
Explanation:
How many mL of O2 at STP are produced from 1.5 g KClO3
Answer:
64.2 L
i watch videos about this stuff because my grades were very low now im bringing the up
Explanation:
In order to be able to calculate the volume of oxygen gas produced by this reaction, you need to know the conditions for pressure and temperature.
Since no mention of those conditions was made, I'll assume that the reaction takes place at STP, Standard Temperature and Pressure.
STP conditions are defined as a pressure of
100 kPa
and a temperature of 0∘C
. Under these conditions for pressure and temperature, one mole of any ideal gas occupies
22.7 L
- this is known as the molar volume of a gas at STP.
So, in order to find the volume of oxygen gas at STP, you need to know how many moles of oxygen are produced by this reaction.
The balanced chemical equation for this decomposition reaction looks like this
2KClO3(s]heat×−−−→2KCl(s]+3O2(g]↑⏐
Andesitic rock is an igneous rock with a composition in between that of basaltic and granitic igneous rock.
true or false
What two layers of the earth are made of rock
Answer: There are two types of crust; oceanic and continental. Oceanic crust is denser and thinner and mainly composed of basalt.
Explanation:
The crust This is the outside layer of the earth and is made of solid rock, mostly basalt and granite. Oceanic crust is denser and thinner and mainly composed of basalt.
Answer:
The crust and the upper layer of the mantle together make up a zone of rigid, brittle rock called the Lithosphere .
Explanation:
In an experiment, two unknown compounds (one an ether and the other an amine) of equal molecular mass were dissolved in water. The result of the experiment is shown in the table.
Solubility Comparison
Unknown Compound Solubility (g/100 ml water)
A 4
B 0.25
Which of the following correctly explains the identity of Compound A and its solubility?
It is an amine; it contains a nitrogen atom that will allow nitrogen-hydrogen bonds to form while in water.
It is an ether; because the oxygen atom is within the carbon chain, so it is free to form oxy-hydrogen bonds to make it more soluble.
It is an ether; the high polarity of the oxygen-hydrogen bond makes it more soluble.
It is an amine; because the lower electronegativity of N than H makes it more soluble.
Answer:
It is an amine; it contains a nitrogen atom that will allow nitrogen-hydrogen bonds to form while in water.
Explanation:
The solubility of amines owes largely to the electronegativity difference between nitrogen and hydrogen. Remember that when hydrogen is bonded to highly electronegative element such as nitrogen, intermolecular hydrogen bonding is possible with water molecules. This explains the greater solubility of amines in water.
Ether molecules do have an oxygen atom, however, and engage in hydrogen bonding with water molecules to a lesser extent compared to amines.
Also, amines participate in some acid-base reactions that lead to the formation of diethylammonium hydroxide, an ion which leads to a greater solubility of amines compared to an ether.
Hence, compound A is an amine.
There are 20 mice in a 5 m2 field ecosystem. The population density of mice is _____.
20 per m 2
5 per m 2
25 per m 2
4 per m 2
Answer:
4per m 2
20 mice divided by 5 so it will be 4 per m 2
) How many moles are there in 2.00 x 10^19 molecules of calcium phosphate?
Answer:
[tex] \huge 3.322 \times {10}^{ - 5} \: \: moles \\ [/tex]
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{2.00 \times {10}^{19} }{6.02 \times {10}^{23} } \\ \\ = 3.322 \times {10}^{ - 5} \: \: moles[/tex]
Hope this helps you
