Answer:
It's Actually Vascular Tissue , Roots, Fruits, and Flowers
Explanation:
UR WELCOME:)
Solve you will get brainliest and23 points
A 20 kg box of rocks is held out over a cliff at a height of 10 m. How much gravitational potential energy does the box of rocks have?
Which of the following statements are true about whether atoms tend to gain
or lose electrons?
Answer:
C and D
Explanation:
Atoms with five, six or seven valance electrons gain electrons to complete the octet because it is more convenient for the atoms to gain three, two or one electron as compared to lose five, six or seven electrons. Thus atoms with five, six or seven valance electrons form negative ions by gaining electrons.
Atoms with one, two or three valance electrons lose the electrons to get complete octet because it is more convenient for the atoms to lose one two or three electrons as compared to gain the seven, six or five electrons. The atoms with one, two or three valance electrons form positive ions.
Which characteristic is common of cnidarians
A- They live only in the oceans
B- They have four legs
C- They live at the surface of the water
D- They have tentacles
Answer:
it's -C......................
I kinda need help pla
Can someone help?
Apparently you couldn’t see the picture in the previous question. Hopefully it will now.
Answer:
ummm sugar is the answer ;-;
How many moles of NH4SO4 are in 17.492 grams
Answer: 0.13 moles
Explanation:
I'll give BRAINLIEST!!!
HELP FAST PLEASE!
Explain how water turns from a liquid to a gas, gas back to a liquid and liquid to a solid.
Answer:
It's all about temperature, when water heats, it turns to a gas - like water on the stove. When heat is reduced, it goes back to a liquid, and when it's frozen (like an ice cube) it's now a solid.
Explanation:
Answer:
Evaporation liquid to a gas. Liquid to solid is freezing.
Gas to liquid is condensation.
Explanation:
Samira has a son who is 24 months old. Her sister Paulina also has a son who is one and a half years old. Whose son is older? Explain how you know.
Answer:
the 24 month old
Explanation:
24 divided by the 12 months in a year is 2 and 2 compared to the 1 and a half is bigger
(Revision) When magnesium, Mg, form magnesium ions, Mg2+, has it beer
oxidised or reduced? *
Answer:
it has oxidized because it has has given out 2 ions
Answer:
Oxidised
Explanation:
Mg -------> Mg2+ +2electrons
In this case Mg loses two electrons and loss of electron is oxidation so Mg oxidised.
The density of water is 1.00 g/mL. If your swimming pool holds 208,000 gallons of water, what is the weight of the water in a filled swimming pool in tons? (1 ton = 2000 lb).
Hint: Look on your equation sheet for conversion factors
Answer:
12.455≈12.5 tons
Explanation:
1 US gallon of water (gal) = 8.35 pounds of water (lb wt.)
so we divide 208,000 by 8.35 to covert to pounds
then divide the pounds by 2000 to convert to tons.
NUCLEAR REACTION! Help!!!!
Answer:
The example of alpha decay.
Explanation:
¹⁷⁵₇₈Pt → ¹⁷¹₇₆Os + ⁴₂He
The example of alpha decay.
Properties of alpha radiation:
Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles consist of two proton and two neutrons. Which is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number less than 4 and atomic number less than 2 as compared to parent atom the starting atom.
Alpha radiations can travel in a short distance.
These radiations can not penetrate into the skin or clothes.
These radiations can be harmful for the human if these are inhaled.
These radiations can be stopped by a piece of paper.
Another example:
₉₂U²³⁸ → ₉₀Th²³⁴ + ₂He⁴ + energy
Please help me in Q3 it’s not understandable to me
Answer:
A- mixture
B- element
C- compound
Explanation:
A mixture is composed of two or more substances. Since it is not entirely homogeneous throughout, then it can not melt or boil at a fixed temperature.
An element is any substance that cannot be decomposed into simpler substances by ordinary chemical processes. This describes substance B.
A pure chemical element has a fixed melting and boiling point.
A compound is composed of one or more chemical elements. A compound may be broken down into its components by certain processes.
if you have 3 dozen pennies how many ml of water would they displace
The mass of the displaced fluid can be expressed in terms of the density and its volume, m = ρV. The fluid displaced has a weight W = mg, where g is acceleration due to gravity. Therefore, the weight of the displaced fluid can be expressed as W = ρVg.
What would the products be when aluminum chloride (which contains Al3+ and Cl- ions) is melted and electrolyzed? Write half equations to show what goes on at each electrode.
The product of electrolysis : Al at cathode and Cl₂(chlorine) at anode
Further explanationGiven
Aluminum chloride compound
Required
The product of electrolysis
Solution
The rule :
The reaction at the cathode(the negative pole) :
1. the reduced active metal is water, other than that the metal will be reduced
2. H⁺ of the acid will be reduced
The reaction at the anode((the positive pole) :
1. if the electrodes are not inert then the metal is oxidized
2. If inert then:
a. OH⁻ from the base will be oxidized
b. The halogen metal will oxidize
In the electrolysis of molten AlCl₃ with an inert electrode, the cation will be reduced at the cathode and the anion will be oxidized at the anode
Cathode : Al³⁺ + 3e⁻ ⇒ Al(s)
Anode : 2Cl⁻⇒Cl₂(g) + 2e⁻
How many moles of helium are contained in 9.85 x 1023 atoms?
9.85 x 1023 atoms
Answer:
10076.55
Explanation:
Please select the word from the list that best fits the definition
Use of this device led to the discovery of cells
a. cells b. microscope c. cell theory
PLZ HURRY
What is an octet of electrons? Which elements contain an octet of electrons?
Answer:
> Octet, in chemistry, the eight-electron arrangement in the outer electron shell of the noble-gas atoms. This structure is held responsible for the relative inertness of the noble gases and the chemical behaviour of certain other elements.
> Referring to the octet rule, atoms attempt to get a noble gas electron configuration, which is eight valence electrons. Sodium has one valence electron, so giving it up would result in the same electron configuration as neon. Chlorine has seven valence electrons, so if it takes one it will have eight (an octet).
By definition, an electron octet establishes that the atom is stable when it has 8 electrons in its valence shell. Noble gases are electrochemically stable elements, that is, they have 8 electrons in their last shell, containing an electron octet.
The octet rule states that the atoms of the elements bond to each other in an attempt to complete their valence shell with eight electrons. In other words, the atoms will tend to give up or share electrons to complete eight electrons in the valence shell through an ionic, covalent or metallic bond.
In other words, the goal is to have the closest noble gas electron configuration, thus having the last complete electron shell and acquiring stability.
That is, the octet rule defines the property that atoms have of completing their last energy level with eight electrons to achieve stability. The basis of this rule are the noble gases that have 8 electrons in their last shell and are the least reactive elements of the entire periodic table.
In summary, an electron octet establishes that the atom is stable when it has 8 electrons in its valence shell. Noble gases are electrochemically stable elements, that is, they have 8 electrons in their last shell, containing an electron octet.
Learn more:
https://brainly.com/question/13496887?referrer=searchResultsBonding Story Mini Project
You can choose to show ionic bonding, covalent bonding (polar or nonpolar), or both, but your story must do the following:
1. Explain the type or types of bonding you are showing - this does not need to be explicit, but it needs to be somehow worked into the story.
2. Show at least 2 different bonds forming (e.g. 2 different compounds)
3. Show the valence electrons of the atoms and how they meet the octet rule
Which action most likely causes large rocks to become smaller pieces of rock?
a. melting inside of Earth
b. weathering by wind and water
C. cementing by mud and minerals
d. being pressed between layers of soil
Answer:B
Explanation:
Help me answer these questions
Answer:
3.
a.climate
4.
c.average measurements of temperature and rainfall over many years
You’ll get marked as brainlist I think because that’s what happened last time (:
Answer:
both are physical, caused by heating
Explanation:
]
What are typical characteristics of metals?
lonization energy
Electron affinity
A
low
low
B.
high
high
C.
high
low
D.
low
high
Answer:
A
Explanation:
Metals has low Ionization energy and low electron affinity. (Option A)
Characteristics of Metals (Ionization energy/Electron Affinity)Metals has low ionization energy because the valence electrons in alkali metals, are very away from the nucleus. Hence, they can easily lose electrons with low energy and become cationic.
Metals have a low electron affinity because they want to give up their valence electrons rather than gain electrons, which require more energy than necessary.
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6. (10 Points) The volume of a helium balloon in Los Angeles is 14.0 L The
temperature in Los Angeles is 25°C. Find the volume of the balloon in
Death Values where the temperature is 52°C, with the pressure being the
same in both places.
PLS HURRY
Answer:
V₂ = 15.27 L
Explanation:
Given data:
Initial volume = 14.0 L
Initial temperature = 25°C (25 + 273.15 = 298.15 k)
Final temperature = 52°C = (52+273.15 = 325.15 k)
Final volume = ?
Solution:
Charles Law:
" The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure "
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 14.0 L × 325.15 K / 298.15 k
V₂ = 4552.1 L.K / 298.15 K
V₂ = 15.27 L
help me please!!!!!!!!!
explain what gravity is in your own words
Answer:
the invisible force around the atmosphere that keeps us from floating all over the place
Explanation:
its the best I could come up with
Answer:
gravity is the thing keeping you down to earth keeping your head outta the clouds and your feet on the ground :)
Explanation:
Is Fire a gas, liquid, or solid...
Answer:
gas
Explanation:
fire is a gas not liquid or soild
What are the standard temperature and pressure conditions enthalpy is usually measured under?
The correct answer is D: 100kPa and 298 K.
The enthalpy of a system is a thermodynamic quantity which can be regarded as the total energy content of the system.
The enthalpy of a system is measured under standard conditions. The standard conditions include;
100kPa298 K1 M (for aqueous solutions)Hence, the standard temperature and pressure conditions enthalpy is usually measured under are 100kPa and 298 K.
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Pleassseee Answerrrrr
Light waves can travel through a vacuum (empty space), while sound
waves cannot travel through a vacuum.
True or False
Answer: True
Explanation:
True. Sound does not have the required energy or speed to travel through a vacuum. Light can exist almost anyplace.
Which of the following statements is NOT true about combustion reactions?
Select one:
a. The products are always carbon dioxide and methane.
b. The reactions involve burning of hydrocarbons.
c. Combustion reactions have oxygen and a hydrocarbon as reactants.
d. There are two types of combustion reactions: complete and incomplete.
Answer:
The answer is option C, that is, combustion reactions have oxygen and a hydrocarbon as reactants.
To solve such this we must know the concept of combustion reaction. Therefore, Combustion reactions have oxygen and a hydrocarbon as reactants. The correct option is option C.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Combustion reaction is a reaction in which a substance, basically hydrocarbons burns in presence of oxygen to produce carbon dioxide and water. Combustion reaction is a chemical process.
Therefore, combustion reactions have oxygen and a hydrocarbon as reactants. The correct option is option C.
Learn more about the chemical reactions, here:
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