Answer:
a sea of electrons
Iron metal has a sea of electrons.
Iron metal is an element which possesses a sea of electrons as a result of it
containing cations which are usually surrounded by electrons which move at
a very fast pace .
This property makes Iron metal to be reactive when exposed to air( oxygen)
and it then forms various compounds such as Iron(II) oxide, Iron(III) oxide and
rust.
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A bicycle tire has a pressure of 18.5 lb/in^2 What's the pressure in torr?
Answer:
B y is a complete collection for your time and energy for the spread of Islam in the Horn of the following to make sure
As the blood travels through your body, it _______.
A. picks up nutrients, water, and waste materials
B. pulmonary circulation
C. the lungs, where it picks up oxygen again
D. capillaries
E. 5
F. systemic circulation
Answer:
C. the lungs where it picks up oxygen again
Structural formula of 2 ethyl, 4 methyl-Heptane
HELP!!
Which one is balanced?
WILL GIVE BRAINLEST!!!!
Answer:
B
Explanation:
I believe c is the answer but maybe wrong though
what element has three valence electrons in the second energy level.
Answer:
Boron
Explanation:
Hope that helps
Answer:
Boron.
Explanation:
2 energy shells
1st energy she'll 2 electrons
2nd energy shell 3 electrons
PLZ HELP!
How do you think changing the angle of a ramp will affect work done?
Answer: The steepness of a ramp affects it by making it easier or harder.
Explanation: It's a bit situational. If you were going up a steep ramp with a heavy load, it will increase the work necessary, whereas if you were going down a ramp, it would decrease the work necessary. If you need this simply put, think about biking up and down a hill. It would be easier going down than up.
teachers instructions - “ clear my examples and replace with your own words “ you get brainliest if I get good grade :)
Answer:
can you give me more clearence on what is going on
Explanation:
Which of the following is a physical change?
a. burning gasoline
b. cooking an egg
c. decomposing meat
d. evaporating water
write one use of quick lime
Answer:
calcium supplements
Explanation:
Significant Figures
1. Indicate how many significant figures there are in cach of the following measured values.
un
246.32
5
1.008
700000
107.854
3
0.00340
3
350.670
4
100.3
14.600
1.0000
6
0.678
0.0001
320001
Which circuit hook-up design will have the brightest light bulb?A - 1 battery 1 bulb, B - 2 batteries 1 bulb, C - 3 batteries one bulb, D 2 batteries the bulb is on the other end, E 1 battery and 1 bulb on the other end
Question 5 options:
A
B
C
D
E
Heres another for you guys!
Answer:
I believe it is E because the battery has a wire, a power source(the battery), and a bulb connected together thus making a full series circuit. Furthermore, the more batteries they are to a series circuit, the more dimmer the light bulbs will be.
Explain five physical and/or chemical properties that you need to consider for the substances before using them as construction materials for buildings
Answer: There are many properties of a metal which is taken into consideration when it is used for construction
Explanation:
The properties can be physical, chemical, et cetera. The physical properties that is considered are:
1. Durability: It can be defined as the property of the material to withstand the atmospheric pressure and other factors.
2. Density: The ratio of mass by volume of a material (homogeneous material) is called as density.
3. Fire resistance: The ability of the material to withstand in fire without changing its size or shape.
4. Weather resistance: The ability of the material to withstand the weather which could be variable round the year.
5.Water absorption: The ability of the material to absorb water and retain it.
Organisms that make energy are called ____.
Answer:
Producers
Explanation:
An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Because autotrophs produce their own food, they are sometimes called producers.
The general area of the atom (outside the nucleus) where the e- are located is the — and —
Please help! Due today. Look at the image:
Reuploaded
Answer:
3
Explanation:
2+2=4-1=3 quick maths
RODINNIS
COURSES
onal Science
Attempt 1 of 2
Which of the following distinctions are used to identify sedimentary rock? Select all that apply.
o where is was formed
conditions it was formed under
n when it was formed
what it is composed of
how many layers it consists of
NEED HELP ASAP (check the picture)
where it was formed and. conditions it was formed under
During ____, the chromatin condenses to make ____.
prophase, chromosomes
metaphase, chromosomes
prophase, DNA
metaphase, DNA
What is the density of an object with a mass of 125 g and a volume of 150 mL ?
Answer:
13
Explanation:
234567877
2.1 x 10^-3 x 2 x 10^2 =
a)
4.2 x 10^-5
b)
4.2 x 10^-1
c)
4.2 x 10^1
d)
4.2 x 10^-6
Answer:
I believe it is B
Explanation:
hope it helps. please let me know if it's wrong
When Earth receives energy from the Sun,
Answer:
100% of the energy entering earth's atmosphere comes from the sun. ~50% of the incoming energy is absorbed by the earth's surface i.e. the land and oceans. ~30% is directly reflected back to space by clouds, the earth's surface and different gases and particles in the atmosphere (the earth's albedo is 0.3 on average)
Explanation:
:)
"You learned about mixtures, especially solutions and the factors that affect their makeup and properties. Why is it important to know the properties of both solutes and solvents when preparing a solution that is expected to meet a certain need?
Does this involve a chemical change or a physical change? Explain."
Can u pls help me
Answer:
its due to the solvents being factored. to be prepared for the solution you would need a chemical change as the solvents get factored so this will mean that it will have a chemical reaction. in this case its slightly different so it will be called a chemical change as 2 different chemicals change and evolve.
Explanation:
HELP HELP DUE IN 5 MINS I WILL MARK BRAINLIEST
Just say that it went below 0/average.
PLZ HELP THIS IS DUE IN 6 MINS
The majority of elements on the periodic table are ______________ (metals, nonmetals, or metalloids).
Answer:
nobel gases ,non metals and metaliods
18. Which statement about photosynthesis is FALSE?
a
Tilmy green pigment chlorophyll captures light
energy
b Oxygen is needed as a reactant to produce
glucose
The process converts light energy from the
csun into chemical energy in the bonds of
glucose.
d
Carbon dioxide is needed as a reactant to
produce glucose.
Which statement about photosynthesis is FALSE?
Answer:
b. Oxygen is needed as a reactant to produce
glucose is the incorrect statement here
Explanation:
plants uses simple raw materials to prepare their food , which includes water ( H2O ) and Carbon dioxide ( CO2 ).
and traps sunlight by Green pigments known as chlorophyll and stores these energy in bonds of glucose molecules
so ,
after this reaction glucose and oxygen is formed as products
● hence we conclude that Oxygen is not needed as a reactant to produce glucose , oxygen is the bi product formed during photosynthesis.
If you look at the periodic table today which elements would best represent a triad as predicted by Dobereiner?
A. Hydrogen Oxygen Nitrogen
B. Nickel Copper Zinc
C. Aluminum Gallium Indium
D. Neptunium Plutonium Americium
E. All of them are triads
HELP ME PLEASE!!!!
Answer: B. Nickel Copper Zinc
Explanation:
Dobereiner's triads was a group of three elements. Dobereiner said that the relative atomic mass of the middle element in each triad was average of the relative atomic masses of the other two elements.
Thus if A, B and C forms Dobereiner's triads, the mass of B is average of mass of A and C.
A. Hydrogen Oxygen Nitrogen:
mass of oxygen = 15.999
mass of oxygen according to Dobereiner = [tex]\frac{1.008+14.007}{2}=7.5075[/tex]
B. Nickel Copper Zinc
mass of copper = 63.5
mass of copper according to Dobereiner = [tex]\frac{58.7+65.38}{2}=62.04[/tex]
C. Aluminum Gallium Indium
mass of gallium = 69.72
mass of gallium according to Dobereiner = [tex]\frac{26.98+114.82}{2}=84.39[/tex]
D. Neptunium Plutonium Americium
mass of Plutonium = 244
mass of Plutonium according to Dobereiner = [tex]\frac{243+237.04}{2}=240.02[/tex]
An isotope of platinum has 100 neutrons. What is the atomic number of this specific isotope of platinum?
100, 98, 195, 198
Answer:
isotopes of the same elements have the same atomic number
Carlita’s body is made up of many cells. What is one thing all her cells have in common?
Answer:
All of them have a nucleus..
Explanation:
Pretty simple stuff. There's no cell without one.
Carlita’s body is made up of many cells. The one thing that all her cells have in common is they have the same kind of genes.
What are genes?Genes are tiny pieces of spherical hereditary material that are bead-shaped and found on chromosomes. They hold the organism's genetic makeup. The number of genes on each chromosome is incalculable.
The hereditary material that makes up chromosomes is arranged in x shapes inside the nucleus. DNA, genes, and proteins make it up. An organism's genotype is distinct from other organisms because of its distinct genetic makeup, and this distinction can be passed down from one generation to the next.
Traits may be influenced by genes, the environment, or a mixture of the two. Quantitative features can also be qualitative, such as eye colour (such as height or blood pressure).
Therefore, numerous cells make up Carlita's body. Her cells all share the same type of genes, which is the only thing that unites them.
To learn more about genes, refer to the link:
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Which ion is a cation? A. Ca2+ B. Cl2 C. S2- D. Br-
Answer:
Ca2+ is cation
Explanation:
Because cation contain positive charge.
under which conditions would the solubility of a gas be greatest
Answer:
when there is high pressure and low temperature then the solubility of a gas will be greatest.
Answer:
B
Explanation:
edg 2021
The burning of a sample of propane generated 1 04.6 kJ of heat. All of this heat was used to heat 500.0 g of water that had an initial temperature of 20.0/C. What was the final temperature of the water?
Answer: 70.0°C
Explanation:
Quantity of heat = Mass * Specific heat * Change in temperature
Quantity of heat = 104.6 KJ
Mass = 500.0 g
Specific heat of water is 4.18 J/g°C
Change in temperature assuming final temperature is x = x - 20
Units should be in grams and joules:
104,600 = 500 * 4.18 * (x - 20)
104,600 = 2,090 * (x - 20)
x - 20 = 104,600/2,090
x = 104,600/2,090 + 20
x = 69.8
= 70.0°C