i need help ASAP plz its timed
Answer:
B) iron (Fe) im sure its iron
How many significant figures does 0.062400 have?
What do you call the meetings of two planets/objects as seen from the earth? hurrry ASAP!!!!!
Answer:
It's called "Great conjunction"
Which statement is true about molarity and percent by mass? (3 points)
Molarity is the amount of solute in 1L of solution while percent by mass is the ratio of the mass solute to the mass of solution multiplied by 100. Both quantities are used measure the amount of solute in solution.
What is molarity and percent by mass?The question is incomplete however, I will try to explain molarity and percent by mass.
The term molarity means the number of moles of a substance is 1 L of solution while the percent by mass is the ratio of the mass solute to the mass of solution multiplied by 100.
Both molarity and percent by mass shows the amount of solute in a solution.
Learn more about molarity: https://brainly.com/question/12127540
Answer:
Both are ratios of the amount of solute over the amount of solution/
Explanation:
took test.
Bats have oversized ears, which help the bats use sound waves to detect the motion of their prey. Which example of the characteristics of life is most similar?
Answer:
option B = A rat hides in its hole when it sees an approaching predator.
Explanation:
In order for any organisms, whether plants or animals to be able to keep being alive they have to develop a/some functions or abilities which is going to aid in their battle battle for survival, this concept is known as the Adaptive features of organisms.
From the question above, it can be seen that the oversized ears in bats is an adaptive features for them to get their food: as it helps them to use sound waves to detect the motion of their prey.
Unlike the bats, the rats adaptive features is to have a good running legs. This will help them to avoid getting eating by predators.
Answer:just saying he is correct
Explanation:
Advantages and disadvantages of solar power
Answer:
Advantakes= it is a renewable source, you can but it anywhere with sunlight
disatvantage= it cost a lot to place/replace, it uses a lot of different materials
The law of unbalanced forces is also known as? :
Answer:
Newton's 2nd Law
Explanation:
Newton's Second Law of Motion is concerned with the effect that unbalanced forces have on motion.
Law of unbalanced forces is also know as Newton's 2nd Law
When turgor pressure is high enough in a cell, the cell walls become _____
Answer:
the answer is "Firm".
Explanation:
A solution is made by dissolving 0.0503 kg of biphenyl (C12H10) in
350.0 mL of benzene (C6H6).
What would be the osmotic pressure (in atm) of this solution at 40.0
°C? (The density of benzene is 0.877 g/mL.)
Answer:
Letter A po
Explanation:
yanffdddddd
What is atomic mass made of?
Answer:
Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.
Explanation:
HELP ME PLS HURRY I NEED THIS ANSWER ASAP !!!!
Answer:
0.1 im pretty sure
because
All those squares equal to 1
So if we use some good ole division
We get 0.1
What is true of both galvanic and electrolytic cells?
A. Reduction happens at the cathode.
B. They are spontaneous. .
C. They are nonspontaneous.
D. Oxidation happens at the cathode.
Answer:
reduction happens at the cathode
Explanation:
Just took the test.
Reduction happens at the cathode. Hence, option A is correct.
What is an electrolytic cell?An electrolytic cell converts electrical energy into chemical energy or vice versa.
Oxidation-reduction reactions are balanced by two half overall chemical equations into an oxidation equation and a reduction equation.
Hence, reduction happens at the cathode in both galvanic and electrolytic cells.
Learn more about electrolytic cells here:
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#SPJ2
calculate the energy required to vaporize a chunk of ice at -25°C with the mass of 12.5kg
THIRTY POINTS I NEED HELP HURRY What is the volume of the cone?
Answer:
V=πr2h 3
Explanation: I would give more but need more i information
Answer:there u go
Explanation:The volume V of a cone with radius r is one-third the area of the base B times the height h . Note : The formula for the volume of an oblique cone is the same as that of a right one. ... If the heights of a cone and a cylinder are equal, then the volume of the cylinder is three times as much as the volume of a cone
Arrange the following elements in order from lowest to highest first ionization energy : AI , Ar, Cs, Na .
Answer:francium
The first ionization energy varies in a predictable way across the periodic table. The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.
Explanation:
The least measure of the energy needed to remove the loosely bound electron of an atom or a molecule is called ionization energy.
The correct order from lowest to highest first ionization energy is:
CsNaAlArThis can be explained as:
(Cs) Caesium will have the lowest energy because in the periodic table it comes in the same group as (Na) sodium. In the group, from top to bottom the ionization energy decreases.(Al) aluminium and (Ar) argon lies in the same period.In a period from left to right the ionization energy increases.Therefore, Cesium will have the least ionization energy as compared to sodium, aluminium and argon.
To know more about ionization energy follow the link:
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i need so much help 50 points!!!!!! complete the graph
Double bonds are formed when atoms share four electrons. true or false
Answer:
That's is true maybe I'm not sure check your book
Theme parks can snap a crystal clear picture of you on a roller coaster at 70 mph, but bank cameras can't get a clear shot of a robber standing still.
bruh.
Answer:
I know right
Explanation:
Hiiiiiiiiiiiiiiiiiii
scientist have grouped the number of elements into
Answer:
columns and rows on the periodic table and groups based on reactivity and such like halogens,noble gases, trans metals, alkali metals, alkaline earth metals, lanthanids, actinids, metalliods, nonmetals and metals.
Explanation:
hey guys can u help me ASAP its on science
Answer:
The answer to your question is A - electrons
Explanation:
To be honest it's pretty obvious, none of the other things could possibly come with valence behind it so electrons is the only logical answer.
Answer:
A. electrons
Explanation:
The valence electrons on the valence shell which is the last layer of electrons are the same for atoms in the same column.
You mix 15g of water with 10 grams of sodium chloride. After the reaction occurs, how
many grams of your new substance do you have?
A) 15g
B) 25g
C) 20g
D) not enough information
Answer:
B) 25g
Explanation:
Every reaction must follow the law of conservation of mass.
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
Explanation:
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
In given photosynthesis reaction:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
In given example:
Water + sodium chloride → Product
15 g + 10 gram = 25 g
25 g = 25 g
What is the formula of iron(iii) oxide?
Answer:
Fe2O3
Explanation:
Answer:
Fe2O3
This is the chemical formula for iron(iii) oxide.
Similarities between sliding and fluid friction
How much energy is required to vaporize 14.27 grams of water at its
boiling point? *
Energy required to vaporize : 32.3 kJ
Further explanationThe heat to change the phase can be formulated :
Q = mLf (melting/freezing)
Q = mLv (vaporization/condensation)
Lf=latent heat of fusion
Lv=latent heat of vaporization
Mass of water = 14.27 g
Latent heat of vaporization ( boiling point of 100 ºC) : 2260 J/g
Energy required :
[tex]\tt Q=m.Lv\\\\Q=14.27\times 2260\\\\Q=32250.2~J\approx 32.3~kJ[/tex]
Balance this equation pls
__NaCl + __CaF2→ __NaF +__CaCl2
Answer:
2NaCl + 1CaF²--------》2NaF + 1CaCl²
Answer:
2NaCl + CaF2 >>> 2NaF + CaCl2
lonic bonds form between metals and
o metalloids O nonmetals o metalloids
Match the intermolecular force with the physical property that will result
Answer:
Intermolecular forces are the forces that bind two molecules together. Physical properties are affected by the strength of intermolecular forces. Melting, boiling, and freezing points increase as intermolecular forces increase. Vapor pressure decreases as intermolecular forces increase. Hope this is what your looking for!
Explanation:
Brainliest please?
what happen when the nitrate of an alkali metal is heatad?
answer
Gives brown colour gas
After food is consumed, chemical nutrients are absorbed into the blood. The blood then carries these nutrients to the body's cells where the nutrients enter mitochondria. Which reaction must occur next for the cell to carry on other activities?
Answer:C
Explanation:oxygen,light,and glucose combine to produce high energy molecules
Answer:
c
Explanation:
I got this answer right so trust me
What is a way in which nuclear fusion is used?
O Space stations
O atomic bombs
O Nuclear power plants
O In stars
