Answer:
Black dwarf- C
white dwarf- F
nebula- B
protostar-D
supernova-G
black hole-A
How do limestones that begins as a coral be found on land?
Answer:The limestone began to form millions of years ago, when the land was under the ocean. The rock developed from shells of tiny organisms that float in the ocean. ... However, in the case of reefs, the limestone is produced directly as coral organisms build their skeletons one on top of another.
Which machine is the least simple? a bike a screw an inclined plane a lever
Answer: A bike
A bike is composed of various simple machines. It has a wheel and axle as one component, and it also has screws to hold the various parts together, along with levers and pulleys that are connected to the pedals. So all of these simple machine concepts work together to help transport the rider from point A to point B.
The other answer choices of screw, inclined plane, and lever, are fairly simple machines that don't have many things going on at once compared to a bike.
The least simple machine is "A Bike"
Hope this helps!
What is the chemical equation( formula ) of the reaction of photosynthesis
Answer:
The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2.
Explanation:
This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.
the number of neutrons in an atom can be found by subtracting the atomic number from the what?
Answer:
This approximation of mass can be used to easily calculate how many neutrons an element has by simply subtracting the number of protons from the mass number. Protons and neutrons both weigh about one atomic mass unit or amu. Isotopes of the same element will have the same atomic number but different mass numbers.
Explanation:
Answer:
mass number
Explanation:
PLEASE HELP!!!!! NEED HELP ASAP!!!!!
Directions: Name the ionic compound created.
EXAMPLE- Sodium and chloride OR NaCl= Sodium chloride
Barium and sulfur =
Magnesium and bromine =
Al2O3 =
KCl =
Answer:
1.BaCO3 2.MgBr2 3.aluminum and oxygen 4.Potassium chloride
Explanation:
a cube has a length of 1.02 cm and a mass of .001012 kg what is its density
Answer:
d = 9.5× 10⁻⁴ Kg/cm³
Explanation:
Given data:
Length of cube = 1.02 cm
Mass of cube = 0.001012 Kg
Density of cube = ?
Solution:
The length , height and width of cube is always same. Thus the volume of cube is,
Volume = length × height× width
Volume = 1.02 cm × 1.02 cm × 1.02 cm
Volume = 1.06 cm³
Density of cube:
d = 0.001012 Kg /1.06 cm³
d = 9.5× 10⁻⁴ Kg/cm³
how are fireworks manufactured and produced
Answer:
1. rolled paper tubes filled with black powder (also called gunpowder), are made.
2. Sometimes they are filled with flash paper and a fuse.
3. When the fuse of a firecracker gets lit, the fire burns along the fuse.
4. Then it eventually reaches the powder, and explodes.
Explanation:
(10 POINTS PLS ANSWER IF U KNOW)
Is the coloring of the peppered moths an example of competition, differential reproductive success, or inherited variation? Explain why.
Answer:
Competition
Explanation:
Peppered moths get their color in lieu to become the fittest among all so that they can survive easily. During industrial age, when pollution suddenly became high these moths changed their color through evolution in order to save themselves from their predators.
PLS GIVE BRAINLIEST
How does a liquid substance change into gas?
Answer: heat
Explanation:
Is that heat boils the liquid and the liquid eventually evaporated into gas
a. Rub the magnet along the nail or knitting needle. Now try picking up the paper clip or tack. Could your nail pick it up? How many can it pick up at once?
b. Now try to make your magnet stronger by rubbing the magnet along the nail or knitting needle for a longer time. Rub only in one direction, not back and forth. This will increase the number of atoms that line up with the magnet. Try to pick up paper clips or thumbtacks. How many can it pick up now?
Answer:
ight i'll answer both rq
Explanation:
a. Rub the magnet along the nail or knitting needle. Now try picking up the paper clip or
tack. Could your nail pick it up? How many can it pick up at once?
after rubbing the magnet with the nail, it could pick up 7 small paper clips.
b. Now try to make your magnet stronger by rubbing the magnet along the nail or knitting
needle for a longer time. Rub only in one direction, not back and forth. This will increase
the number of atoms that line up with the magnet. Try to pick up paper clips or
thumbtacks. How many can it pick up now?
after rubbing it a second time but for a longer period, it could pick up around 10, almost lifting the 11th.
Answer:
A. After rubbing the magnet with the nail, it could pick up 7 small paper clips.
B. After rubbing it a second time but for a longer period, it could pick up around 10 small paper clips, almost lifting the 11th one.
Carbon monoxide (CO) burns readily in oxygen (O2), forming
carbon Dioxide (CO2). Which of the follow equations is shows
this reaction and follows the law of conservation of mass?
Answer:
see attachment......
I need someones help
Answer:
y or z one of those two i think its z but im so sorry if im wrong if not z then try y also I learned this last year.
Metal X displaces metal Y. Metal Z does not react with X or Y. What is the correct order of decreasing reactivity for metals X, Y, and Z?
Answer:
Metals on top of the activity series can displace metals at the bottom and they are highly reactive as compared to metals at the bottom of the series.
Hence, the order is X>W>Y>Z.
1. Glucose, a type of sugar, has the formula
CH, O. What is the total number of atoms
in one molecule of glucose?
Answer:
The answer is 24 in total
Explanation:
This is a 2:1 ratio. The formula of it is C6 H12 O6
Difference between bouyancy and density
Answer:
what She said but better
if you had a chance to get a scholarship abroad?what would you do?
Answer:
I Would bc it's the better opportunity
whats the balanced chemical equation for the standard formation reaction of solid glucose, where everything can only have 1 mole with physical states.
Answer:
6C(s) + 6H2(g) + 3O2(g) --------------------> C6H12O6(s).
Explanation:
One of the examples under the type of sugar; monosaccharide(simple sugar) is the glucose. Glucose(with IUPAC name as D-glucose) as a monosaccharide (simple sugar) has the molar mass of 180.156 g/mol and a Melting point of 146 °C.
Thus, the unbalanced chemical reaction for the formation of glucose is given below;
C(s) + H2(g) + O2(g) --------------------------> C6H12O6(s) ΔH°f = -1273.1KJ/mol.
The balanced chemical reaction for the formation of one mole of glucose is given as;
6C(s) + 6H2(g) + 3O2(g) --------------------> C6H12O6(s).
The balanced chemical equation for the standard formation reaction of solid glucose is: [tex]\mathbf{6C_{(s)} + 6H_{2(g)} +3O_2_{(g)} \to C_6H_{12}O_{6} _{(s)} \ \ \ }[/tex]
Glucose is a simple sugar of a class of carbohydrates known as monosaccharides. It is the principal metabolite for energy production in the human body.
The formation of solid glucose [tex]\mathbf{C_6 H_{12} O_6_{(s)}}[/tex] occurs by the reaction of carbon, hydrogen, and oxygen.
The reaction formation of the solid glucose is:
[tex]\mathbf{C_{(s)} + H_{2(g)} +O_2_{(g)} \to C_6H_{12}O_{6} _{(s)} \ \ \ \Delta H_f^0= -1273.1 \ kJ/mol}[/tex]
Now, the balanced chemical equation can be expressed as follows;
[tex]\mathbf{6C_{(s)} + 6H_{2(g)} +3O_2_{(g)} \to C_6H_{12}O_{6} _{(s)} \ \ \ }[/tex]
Learn more about glucose here:
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Question 1
The best alternate headline for this article would be
o Scientists Find 500 Planets Outside Earth's Solar System
O Newly Discovered Exoplanet Has Earth-like Temperatures-Plus Water!
O Scientists Find "Goldilocks Zone" in Space-Neither too hot nor too cold!
Newly Discovered "Goldilocks" Planet Might Be Right for Life
Answer:
by Judith Curry On what we can learn from Goldilocks and The Three Bears ... In planetary science, the 'Goldilocks zone' is terminology for the the band ... We all know the fairy tale story of “Goldilocks and the three bears”, where GL ... as the discovery that the Earth was not the center of the solar system.
Explanation:
In the periodic table hydrogen is placed in Group 1A (group 1) and helium is placed in Group 8A (group 18). The most likely reason for this is:
Answer:
This question appears incomplete
Explanation:
This question appears incomplete because of the absence of options. However, hydrogen is placed in group 1 because it has just one electron in it's outermost shell (which happens to be the only shell it has) just like every other group 1A/group 1 element. While helium is placed in group 8A/group 18 because it has a completely filled outermost shell (which is also the only shell it has) just like every other element in group 8A/group 18.
In the periodic table hydrogen is placed in Group 1A (group 1) and helium is placed in Group 8A (group 18). The most likely reason for this is configuration, energy level and properties.
Hydrogen is located in group 1 of the periodic table, although its electronic configuration is 1s¹ and its properties do not correspond to those of the alkali metals of that group. But in its electronic configuration you can see that it has only one electron in its outermost shell (which turns out to be the only shell it has), just like any other element of group 1A /group 1, so it is located in that group.
On the other hand, although the electronic configuration of helium is 1s², this element does not appear in group 2 of the periodic table of elements, but is placed in group 18. This is because it has the energy level complete, so it has the properties of a noble gas, that is, it is inert (it does not react), and it is a colorless and odorless monatomic gas.
In summary, in the periodic table hydrogen is placed in Group 1A (group 1) and helium is placed in Group 8A (group 18). The most likely reason for this is configuration, energy level and properties.
Learn more:
https://brainly.com/question/11453962?referrer=searchResultshttps://brainly.com/question/14658500?referrer=searchResultshttps://brainly.com/question/12250124?referrer=searchResultswhat is 14.235 rounded to the nearest tenth
Answer:
it would round down to 14.2
Explanation:
the 35 is below 50 so it goes down, and it rounds down to 14.2 instead of, if if was, say, 14.62 then that would round up bc the decimal is higher than 50.
but since it is 235, then it rounds down to 14.2
stay safe, TPWK!
Which compound in the picture has a central atom with four outside atoms and has at least one nonpolar bond.
Answer:
The answer is:
B
Explanation:
The compound in Option B is Methane.
Methane is known to be a compound which has two elements, carbon and hydrogen. It has a central atom which is surrounded by four hydrogen atoms. It's chemical formula is CH4.
Methane's outer atoms are dipoles and are in the same direction. This makes the overall molecule non-polar. The compound itself has non-polar bonds and it is non-polar itself.
Aqueous solutions of sodium carbonate and magnesium chlorate are mixed, what is the precipitate, chemical equation, complete ionic equation, and net ionic equation
Answer:
Explanation:
Na₂CO₃ (aq)+ MgCl₂ (aq) = MgCO₃(s) +2NaCl (aq)
MgCO₃(s) is the precipitate .
Ionic equation
2 Na⁺¹ + CO₃⁻² + Mg⁺² + 2 Cl⁻¹ = MgCO₃(s) +2 Na⁺ + 2 Cl⁻
net ionic equation
Mg⁺² + CO₃⁻² = MgCO₃ (s) .
The precipitate formed in the reaction has been the magnesium carbonate salt. The net ionic equation will be: [tex]\rm Mg^2^+\;+\;CO_3^2^-\;\rightarrow\;MgCO_3[/tex].
The mixture of sodium carbonate and magnesium chlorate has been given as:
[tex]\rm Na_2CO_3\;+\;MgCl_2\;\rightarrow\;MgCO_3\;+\;NaCl[/tex]
The precipitate formed in the reaction has been the magnesium carbonate salt. The chemical equation has been written as the equation with the states of the reactants and the products.[tex]\rm Na_2CO_3\;(aq)\;+\;MgCl_2\;(aq)\;\rightarrow\;MgCO_3\;(s)\;+\;2\;NaCl\;(aq)[/tex]
The ionic equation for the reaction has been:[tex]\rm Na_2CO_3\;\rightarrow\;2\;Na^+\;+\;CO_3^2^-[/tex]
[tex]\rm MgCl_2\;\rightarrow\;Mg^2^+\;+\;2\;Cl^-[/tex]
[tex]\rm MgCO_3\;\rightarrow\;Mg^2^+\;+\;CO_3^2^-[/tex]
[tex]\rm NaCl\;\rightarrow\;Na^+\;+\;Cl^-[/tex]
The ionic equation for the reaction will be:
[tex]\rm 2\;Na^+\;+\;CO_3^2^-\;+\;Mg^2^+\;+\;2\;Cl^-\;\rightarrow\;MgCO_3\;+\;2\;Na^+\;+\;2\;Cl^-[/tex]
The net ionic equation has been consisted of the products that have been different on both the product and the reactant side. The same ions are eliminated in the net ionic equation. The net ionic equation will be:[tex]\rm Mg^2^+\;+\;CO_3^2^-\;\rightarrow\;MgCO_3[/tex]
For more information about the net ionic equation, refer to the link:
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The chemical reaction for photosynthesis is: 6CO2 + 6H2O in sunlight yields C6H12O6 + 6O2. a. What is the function of sunlight in the reaction. b. What is the function of chlorophyll/ chloroplast?
Answer:
Sunlight provide light energy.
Chlorophyll absorb light.
Explanation:
Sunlight provide light energy or give light energy from sun and it is use to produce glucose from carbondioxide and water which is also a source of energy.
Chlorophyll absorbs light energy and use it to convert carbondioxide and water into glucose and oxygen or it captures sun rays and produce glucose and water.
Why is it that no two elements have the exact same emission spectrum?
Answer:
When atoms are excited they emit light of certain wavelengths which correspond to different colors. Each element produces a unique set of spectral lines. Since no two elements emit the same spectral lines, elements can be identified by their line spectrum.
Explanation:
Which is the IUPAC name for NO?
Answer:
Nitrogen (ii) oxide
Explanation:
To know the IUPAC name for NO, we shall determine the oxidation number of N in NO.
NOTE: The oxidation number of oxygen (O) is always – 2.
Thus the oxidation number of N in NO can be obtained as follow:
N + O = 0 (ground state)
N + (– 2) = 0
N – 2 = 0
Collect like terms
N = 0 + 2
N = +2
Thus, the oxidation number of Nitrogen (N) in NO is +2.
Therefore, the IUPAC name for NO is Nitrogen (ii) oxide
Answer:
nitrogen monoxide
Explanation:
for those taking quiz on edge
BEST ANSWER WILL BE MARKED BRAINIEST
Why does photosynthesis occur? Please explain your answer and do NOT google to find the answer.
Answer:
photosynthesis occurs so the plants can create energy from carbon dioxide and sunlight.
Explanation:
so basiclly it occurs so the plants can create energy to stay alive.
Answer:
Explanation:
photosynthesis occurs basically to help plants get light in order to produce its necessary daily production of nutrients needed for animals to get carbohydrates froms which is eaten by animals since it gives energy. so basically photosynthesis--> energy --> carbs for mammals to eat!
the green colour reflects off the plant so it is not absorbed by the chloroplasts rather all colours are absorbed just not green.
and every organic material on earth is produced by these cells which convert energy from the sun into nutrient filled plants.. its essential for the CO2 cycle , and since they conduct photo synthesis they are lowest level in the food chain so basically its important since they create nutrients for our plants.
check wether all the answers are correct or not. please?
Answer:
I dont now but I think it is correct
which description of salt is a chemical property?
No combustion
Odourless
salty taste
solid does not conduct electricity
Answer: No combustion
Explanation:
SECOND SCIENCE WORKSHEET:
Answer the following:
1:
Which type of cell has a cell wall?
2: What is the smallest part of any substance?
3:
What is used to see tiny objects?
4: What name is given to a substance where all the atoms are the
same?
5: What does the safety symbol with flames mean?
6: What gives the ability to do work?
7: Which part of the cell controls all cell activity?
8: By what process does a liquid change to a gas?
I
Answer:
1 animal cell
2?
3 mircoscope
4?
5 it means whenever you becareful
The molecule
found in paper is almost identical to the
carbohydrate molecule found in mashed
potatoes.
glycogen
chitin
cellulose
Answer:cellulose
Explanation:
I just did it.