Answer:
Nitrogen fixation is the process of converting nitrogen to a usable form.
How many significant figures are in 0.0034 cm? a 2 b 3 c 1 d 4
Answer:
A. 2 sig figs
Explanation:
In the number 0.0034, the zeros are called leading zeros. The only function of leading zeros is to fix the decimal point. Leading zeros are not counted as significant figures.
define not matter and give examples
Answer:
Everything that has mass and takes up space is matter. Every day, you encounter phenomena that either don't have mass or don't take up space. They are non-matter. Basically, any type of energy or any abstract concept is an example of something that is not matter.
An apple.
A person.
A table.
Air.
Water.
A computer.
Paper.
Iron.
hope this helped you
Nitrogen can be converted to both biological and chemical ways. Why is nitrification an important process? 1. Bacteria converts ammonia into nitrites and nitrates that plants can use. 2. Fungi convert nitrogen in dead plants into ammonium which converts proteins into ammonia. 3. Nitrogen is converted into a usable form through lightning fixation. 4. Plant enzymes reduce nitrogen compounds into amino acids.
Answer:
it is option A
Explanation: nitrification, is the process by which bacteria in the soil convert ammonia to nitrites and nitrates. Ammonia (NH3) was produced by nitrogen fixation, but plants prefer nitrites and nitrates as a source of nitrogen and oxygen.
hope it helps
What is the mass of an rock that has a density of 3.52 g/cc. and when put in a graduated cylinder with 50ml of water makes the level rise to 62ml.
Answer:
m = 42.24 grams
Explanation:
Given that,
The density of the mass of a rock is 3.52 g/cm³.
Initial volume of the graduated cylinder is 50 mL and when rock is put in it the water level makes the level rise to 62 mL.
We need to find the mass of the rock.
Volume of rock = final volume - initial volume
Volume of rock = 62 mL - 50 mL
Volume of rock = 12 mL
1 ml = 1 cm³
So, 12 mL = 12 cm³
Density=mass/volume
[tex]m=d\times V\\\\m=3.52\ g/cm^3\times 12\ cm^3\\\\m=42.24\ g[/tex]
So, the mass of the rock is 42.24 grams.
The mass of the rock is 42.24 g
We'll begin by calculating the the volume of the rock.
Volume of water = 50 mL Volume of water + rock = 62 mL Volume of rock =?Volume of rock = (Volume of water + rock) – (Volume of water)
Volume of rock = 62 – 50
Volume of rock = 12 mL
Finally, we shall determine the mass of the rock.
Volume of rock = 12 mLDensity of rock = 3.52 g/cm³ = 3.52 g/mLMass of rock =?
Mass = Density × Volume
Mass of rock = 3.52 × 12
Mass of rock = 42.24 g
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PLEASE MY TEACHER DIDNT TEACH ME THIS PLEASE
A. group 1.
Hope this helps.
Answer:
[tex]\Large \boxed{\mathrm{\bold{A.} \ Group \ 1}}[/tex]
Explanation:
In covalent bonding, atoms share electrons from their last shell to other atoms to gain stability.
Chlorine has 7 electrons in its last shell, it needs to gain 1 electron to become stable.
Group 1 elements have 1 electron in their last shell, they need to lose 1 electron to become stable.
Group 1 elements can bond with chlorine.
This was on my digital worksheet. I need help, I haven’t used Brainly in a while.
Which statement is correct?
A. Block A has the greatest density.
B. Block B had the greatest density.
C. The density of Block A is equal to the density of Block B.
D. The density of Block B is equal to the density of Block C.
Answer:
Block B
Explanation:
the quantity of mass per unit volume of a substance
even though they have all the same volume, block B is more compact hence the weight is more heavier.
what does code zero mean in a science lab
Answer:
either expolshion or hide
Explanation:
so be ware :O
A group of scientists in Alaska notices that not only have atmospheric CO2 levels increased at their sampling site but so too have methane levels. What could account for this increase in methane levels
Answer:
The release of methane from thawed permafrost.
Explanation:
The complete question is
A group of scientists in Alaska notices that not only have atmospheric CO2 levels increased at their sampling site but so too have methane levels. What could account for this increase in methane levels?
- None of the answer options is correct.
- The release of methane from thawed permafrost.
-A decrease in beef production near the researchers' sampling area.
-The melting of permafrost accompanied by the thawing of methane-producing bacteria.
-The failure of rice paddies to be established in Alaska, given its climate.
Permafrost regions like the arctic circle hold a large supply supply of methane in their soils and their seas. Ordinarily, this methane should be gradually released naturally over a long period of time, but the effects of global warming is making these permafrost to thaw at a much faster rate, accelerating the release of methane into the atmosphere. The dark side is that methane is about 80 times more deadly when compared to CO2 in its contribution to the green house effect on earth.
Which of these would most likely be considered a pure substance?
a. Tap water
b. Red Bull
c. Water vapor
d. The air we breathe
e. A rock from your backyard
Answer:
c. Water Vapour
Hope it helps.
the answer is C- water vapour
A cubic container is filled up with an unknown liquid whose density is 0.180 g/cm3. The side lengh of the container is 5.00cm. Whaf is the mass of this liquid??
Answer:
22.5
Explanation:
M=D*V
V=5*5*5=125
M=0.180*125= 22.5
The mass of the liquid is 22.5 g.
A cubic container has a side length (l) of 5.00 cm. We can find the volume of the cube occupied by the liquid using the following expression.
[tex]V = l^{3} =(5.00cm)^{3} =125 cm^{3}[/tex]
We have 125 cm³ of a liquid with a density of 0.180 g/cm³. The mass of the liquid is:
[tex]125 cm^{3} \times \frac{0.180g}{cm^{3} } = 22.5 g[/tex]
The mass of the liquid is 22.5 g.
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What’s 73m equal to in dm
Answer:730
Explanation:
Yosemite Falls, in California, has a total height of 73,000cm. What is the height in meters?
Answer:
Height in meters = 73000 ÷ 100
(1m =100cm)
= 730m
Hope it helps.
Answer:
730m
Explanation:
100cm = 1m
73,000cm = 73000cm/100cm (take 2 zeros away)
= 730m
New substances are produced by a(n)
change.
Answer:
New substances are produced by a chemical change
Convert 538.35 to scientific notation.
Answer:
= 5.3835 × 102
Explanation:
Answer:
5.3835x10^2
Explanation:
5.3835x10^2
5.3835x100
538.35
When writing a scientific notation, the two numbers in which the decimal is put must be 1-10.
A decimal can't be put between 0-10.
Hope this helps ;) ❤❤❤
ANSWER ASAP PLEASE WILL GIVE POINTS
Which sentence about particles in matter is true?
A. Atoms are present in solids and liquids but not in gases.
B
The particles of matter are in constant motion,
c.
The same kinds of atoms are found in different elements.
D
When a solid changes to a liquid, the sizes of the particles change.
Answer:
b
Explanation:
.
Potassium atomic number a) 27 b) 67 c) 19
Answer:
C
Explanation:
19 is the answer, because it is the atomic number of potassium. Hope it helps!
The pressure of a basketball is 412 mmHg. How many kPa is that equal to?
a. 313, 000 kPa
b. 0.117 kPa
c. 0.542 kPa
d. 54.9 kPa
Answer:
d. 54.9 kPa
Explanation:
mmHg and Pa are units of pressure used in chemistry principally in the study of gases. 1mmHg is equal to 133.322Pa. 412mmHg are:
412 mmHg * (133.322Pa / 1mmHg) = 54929 Pa
The prefix K (Kilo) represents one thousand of the determined unit.
54929Pa are:
54929Pa * (1KPa / 1000Pa) = 54.9kPa
Right answer is:
d. 54.9 kPaDescribe the test for iodide ions
Answer:
The test solution is acidified using a few drops of dilute nitric acid, and then a few drops of silver nitrate solution are added. Different coloured silver halide precipitates form, depending on the halide ions present: ... iodide ions give a yellow precipitate of silver iodide.
Which can lead scientists to change a theory that has already been accepted? Check all that apply. changes to scientific laws new experimental methods new hypotheses technological inventions repetitions of old experiments
Answer:
New experimental methods
Technological inventions
Explanation:
A scientific theory is usually not based on speculation. Scientific theories must have a solid empirical basis.
However, experimental methods are limited to the caliber of equipments available at the time in which a theory is formulated. With advancing years, more technological sophistication leads to the invention of new instruments and ultimately, the development of new experimental methods.
These innovations are likely to alter existing scientific theories as new evidences emerge, hence the answer.
new experimental methods
new hypotheses
technological inventions
93. Coke is an impure form of carbon that is often used in the
industrial production of metals from their oxides. If a sam.
ple of coke is 95% carbon by mass, determine the mass of
coke needed to react completely with 1.0 ton of copper(II)
oxide.
2CuO(s) + C(s) → 2Cu(s) + CO2(8)
Answer:
Explanation:
3.643 x 10^-1 scientific notation
Answer:
its already in scientific form
its ordinary form would be 0.3643 and dragging the decimal point after the first non zero digit and multiplying it with a multiple of 10 we gain scientific form i-e 3.643*10^-1
Explanation:
What is the mass of 7 x 10^28 atoms of Fe?
Answer:
6 x 10⁶ g Fe
Explanation:
Step 1: Set up dimensional analysis
7 x 10²⁸ atoms Fe (1 mol Fe/6.02 x 10²³ atoms Fe)(55.85 g Fe/1 mol Fe)
Step 2: Multiply, divide, and cancel out units
atoms Fe and atoms Fe cancel out.
mol Fe and mol Fe cancel out.
We should be left with g Fe.
7 x 10²⁸/6.02 x 10²³ = 116279 mol Fe
116279(55.85) = 6.49 x 10⁶ g Fe
Step 3: Sig figs
There is only 1 sig fig in this problem.
6.49 x 10⁶ g Fe ≈ 6 x 10⁶ g Fe
in what way do scientists help the government do its work
Answer:
Inventing gadgets to make their work easier.
Protecting the country using bombs and guns.
Explanation:
All of the above
10 points
A gardener wants to know how much fertilizer his roses require to have
lots of blooms. Which group would be the control group*
O The plants without any fertilizer.
2 drops of fertilizer
4 drops of fertilizer
None of the above
PREDICT What properties do you think a spoon must have for it to be useful as an eating
What is one thing rock, air and water all have in common
Answer: all can be affected by the natural environment ( not sure answer hope it helped)
Explanation:
Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, rock, air and water all are matter.
What is matter?Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.
Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.
So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. Rock, air and water all are matter.
Therefore, rock, air and water all are matter.
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0.000000000008
Scientific notation
Answer:
= 0.8
not really sure about the answer I just guessed it
am sorry if it's wrong
How does carbon 14 differ from the typical carbon found on the periodic table?
Answer:
A neutral atom of Carbon-12 contains six protons, six neutrons, and six electrons; therefore, it has a mass number of 12 (six protons plus six neutrons). Neutral carbon-14 contains six protons, eight neutrons, and six electrons; its mass number is 14 (six protons plus eight neutrons)
Match each term to its definition. 1. compound 2. atom 3. element 4. molecule a. the basic unit of matter b. a substance containing only one type of atom c. a substance that contains more than one atom d. a material made up of atoms of different elements
Answer:
1. C
2. A
3. B
4. D
i think
Answer:1. compound = c. a substance that contains more than one atom
2. atom=a. the basic unit of matter
3. element=b. a substance containing only one type of atom
4. molecule =d. a material made up of atoms of different elements
how many pascals are in 41.65 kilopascals?
Answer: 41,650
Explanation: A kilopascal is one thousand pascals, so 41.65 times 1000 equals 41,650