Answer:
Antoine Laurent Lavoisier (1743 -94), a French chemist was the first to establish an experimentally useful definition of an element. Elements can be normally divided into metals, non metals and metalloids.
The bacteria can chemically combine nitrogen with hydrogen to form ammonia (NH3). This combining process is called nitrogen fixation.
Which group of organisms chemically combines nitrogen with hydrogen in a process called nitrogen fixation?
birds and reptiles
all mammals
bacteria
only aquatic plants
Answer:
bacteria
Explanation:
they are decomposers. they decompose dead material by fixing nitrogen
Balance this equation Ga2O3 +MgF2->GaF3 + Mg0
Answer:
2Ga2O3 +3MgF2->2GaF3 + 3Mg0
i think
Explanation:
Which of the following would SLOW DOWN the rate of chemical
weathering?*
Decreasing surface area
Increasing the temperature
Increasing rainfall
O Increasing surface area
Answer:
increasing rainfall. hope it help
Explain why is ortho nitrophenol more acidic than ortho methoxyphenol
Answer:
Ortho nitrophenol is more acidic than ortho-methoxyphenol.
Reason:
This is because the nitro-group is an electron-withdrawing group. In the case of ortho methoxyphenol; methoxy group is an electron-releasing group. Thus, it increases the electron density in the O−H bond and hence, the proton cannot be given out easily.
Hope this helps you. Do mark me as brainliest.
Which is true about the compounds carbon monoxide (CO) and carbon dioxide (CO2)?
A. The compounds have the same properties because they contain the same elements.
B. The compounds have different properties because they are found in different amounts in the atmosphere.
C. The compounds have the same properties because they are both gases.
D. The compounds have different properties because they contain the same elements in different quantities.
Answer: D. The compounds have different properties because they contain the same elements in different quantities.
Explanation:
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass. It can be decomposed into simpler constituents using chemical reactions.
[tex]CO[/tex] contains carbon and oxygen in the ratio of 3: 4 by mass whereas [tex]CO_2[/tex] contains carbon and oxygen in the ratio of 3: 8 by mass.
The physical properties of two different compounds are different as they contain same elements but the elements are present in different ratios.
How many grams of sodium nitrate are needed to prepare a 0.965 M sodium nitrate solution that contains 1,640 g of water?
Answer:
134.5 g
Explanation:
Let us recall that 1g of water = 1cm3 of water
Hence;
1,640 g of water = 1,640 cm3 of water or 1.64 L
This is now the volume of the solution
Now;
m/M = CV
m = mass of the solute
M = molar mass of the solute
C = concentration of the solution
V = volume of the solution
m/84.9947 g/mol = 0.965 M * 1.64 L
m = 0.965 M * 1.64 L * 84.9947 g/mol
m = 134.5 g
What is the correct empirical formula for C18H306?
Uzupełnij zapis powstawania jonu z atomu. Podaj liczby protonów i elektronów wjonie.( ... / 2 p.)a) S ................. → S2–b) K ..................... → K+ liczba protonów: ........... Liczba protonów: ........... Liczba elektronów: .......... Liczba elektronów: ..........
Answer:
Only when a podaj is connected with equal terms with a wjonie.( .. / 2 p.a)a) S
Explanation:
hope this helps :)
How many grams are in 0.75 moles of SO2
48 g SO₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
0.75 mol SO₂
Step 2: Identify Conversions
[PT] Molar Mass of S - 32.07 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of SO₂ - 32.07 + 2(16.00) = 64.07 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 0.75 \ mol \ SO_2(\frac{64.07 \ g \ SO_2}{1 \ mol \ SO_2})[/tex]Multiply/Divide: [tex]\displaystyle 48.0525 \ g \ SO_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
48.0525 g SO₂ ≈ 48 g SO₂
Explain why hydrocarbons are present in so many different compounds.
Answer:
Many hydrocarbons are found in plants, animals, and their fossils; other hydrocarbons have been prepared in the laboratory. We use hydrocarbons every day, mainly as fuels, such as natural gas, acetylene, propane, butane, and the principal components of gasoline, diesel fuel, and heating oil.
Solve fort t
t + 11 = 20
I’m boat to give up u the goat
Answer:
t = 9
Explanation:
t + 11 = 20
-11
t = 9
What is the relationship between extinction and biodiversity ?? PLEASE ANSWER!!!!!!!
Answer:
The biodiversity of an area is literally the number of species, both plant and animal, inhabiting the environment being examined. When a species is no longer found in a region, it is locally extinct.
Explanation:
Which organism obtains energy without depending on another organism
Answer:
Plants
Explanation:
Is this the right answer
Answer:
srgerhe5h4hebdfbdfdfnafyn
Explanation:
What is the molecular formula for C5H7 if its molar mass is 536 g/mol?
Answer:
(C5H7)8
Explanation:
It's empirical formula is given as; C5H7
Molar mass of carbon(C) = 12 g/mol
Molar mass of hydrogen(H) = 1 g/mol
We are told that it's molar mass is 536 g/mol.
To find the molecular formula;
Molecular formula = n × empirical formula
Thus;
n = 536/((12 × 5) + (1 × 7))
n = 8
Thus;
Molecular formula = (C5H7)8
Sophia was fascinated while studying the role of oceans in the hydrosphere. She decided to illustrate the features of the ocean floor on a poster for her part in a group project. Identify and describe the kinds of features found on the ocean floor.
Answer:
The Major features of the ocean floor are:
Continental ShelfContinental SlopeContinental RiseAbyssal PlainOceanic TrenchMid-Ocean RidgeExplanation:
1. Continental Shelf: This refers to the part of the land on every continent that is covered with water that is not too deep. The types of animals that can be found on the continental shelf are:
Crab, Tuna, Lobster, Dungeness cod, etc. Within the Continental shelf, there are permanent rocks that house other organisms such as sponges, anemones, clams, sponges, oysters. The continental shelf also contains the route of migration for bigger animals such as sea turtles dolphins and even whales.
2. Continental Slope: This spans from the shelf break to the continental rise. It can slope up to 4 degrees. Slopes can be created by faulting, slumping of huge boulders of sediments, rifting, etc.
Some of the aquatic animals that can be found in this region include but are not limited to:
Sablefish, Dover sole rockfish, etc.
3. Continental rise
This part of the ocean floor usually has a very steep gradient or angle slope. It slopes very steeply into the abyssal plain of the ocean.
The following can help form continental rise:
Mass wasting;deposition from contour currents and the longitudinal settling of biogenic and clastic particles4. Abyssal Plain.
This is the real bottom of the ocean. There is a very high probability that one would find animals such as nematodes, polychaetes, etc which are all types of worms down there. The Abyssal plain is also home to molluscs, and echinoderms.
5. Oceanic Trench
Sometimes there is a long and narrow indenture or depression along the seafloor. These are called Trenches. Trenches are sometimes formed by the boundaries between one lithospheric plate and another. The deepest trench on earth is found in the Pacific Ocean. It has been nick-named the Challenger Deep and said to be the deepest point known on earth reaching almost 11 kilometers.
6. Mid-Ocean Ridge
This is a mountain range underneath the ocean. It is formed when there is an upward push by convection currents of the mantle beneath the oceanic crust. When this happens and molten magma is ejected or created at the boundary between the plates, the result is a Mid-Oceanic Ridge.
Cheers
What is Metabolism?
A)The body
B)The Cells
C)The body's use of molecules for energy and growth
D)Eating food when you are hungry
Answer:
C I think.
Explanation:
What is the purpose of a spectroscope? *
A. to spread light into different wavelengths
B. to study a star's composition
C. to study a star's temperature
D. all of the above
PLEASE HELP!!
What is the SI unit of time?
A.
second
B.
minute
C.
hour
D. day
Answer:
option a. second
.............
What two physical properties depend on the sample size of a substance? Give examples for
each.
Answer:
Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present.
how many molecules are in SO4
Answer:
there are 5 molecules in SO⁴
COMO HA CONTRIBUIDO JUNTO A LA MOLALIDAD Y LA NORMALIDAD, CON EL DESARROLLO TECNOLOGICO Y DE LA HUMANIDAD.
Answer:
La molalidad y la normalidad son definiciones empleadas en aplicaciones de concentración bastante útiles para lograr proporciones óptimas en soluciones sólido-líquido y líquido-líquido, asimismo permite un criterio cuantitativo para aplicar un control de calidad en insumos productos a cualquier escala, así como garantizar unos mínimos de seguridad en materia de cuidado ecológico y de la salud humana, evitando desastres ecológicos, así como enfermedades y muertes asociadas a intoxicaciones.
Explanation:
La molalidad y la normalidad son definiciones empleadas en aplicaciones de concentración bastante útiles para lograr proporciones óptimas en soluciones sólido-líquido y líquido-líquido, asimismo permite un criterio cuantitativo para aplicar un control de calidad en insumos productos a cualquier escala, así como garantizar unos mínimos de seguridad en materia de cuidado ecológico y de la salud humana, evitando desastres ecológicos, así como enfermedades y muertes asociadas a intoxicaciones.
how are inclined planes used in the real world
Answer:
hi
Explanation:
Inclined planes are widely used to move heavy loads over vertical obstacles; examples vary from a ramp used to load goods into a truck, to a person walking up a pedestrian ramp, to an automobile or railroad train climbing a grade. ... The screw consists of a narrow inclined plane wrapped around a cylinder.
Have a nice day
What happens to the hydrogen-hydrogen and nitrogen-nitrogen bonds?
Answer:
hydrogen nitride
Explanation:
since they are bounding they would become a compound, and so it would need to expand
Picture down below!!
Thank youuuu
kts-rtya-rjk
thora bored hoon koi ladki hai
plz aa jao
Minerals are part of the Geosphere, which is composed of several layers.
O True
O False
1. How many moles of hydrogen, H2, are needed to react with 2.6 moles of
nitrogen, N2?
N2-3H2
-
2NH2
Answer:
7.8
ratio is 3 H2 to 1 of N2
so multiply 2.6 by 3
Explanation:
Which characteristic is true of sexual reproduction but not of asexual reproduction?
Answer:
j one or more parents. that's the answer
When two objects with neutral charges are brought together, the objects
a. attract each other
b. repel each other
c. all of the above
d. none of the above
Answer:
a. attract each other
Explanation:
What do plants need in order to make food?
A. water, energy, oxygen
B.carbon dioxide, energy, oxygen
C.water, energy, carbon dioxide
D.water, oxygen, carbon dioxide
Answer:
Water, solar energy, carbon dioxide
Explanation: