Answers
Answer: Moss
Explanation: It's a flowerless plant
Related Questions
The amount of heat absorbed by the calorimeter in this reaction must be determined before you can calculate the enthalpy of the reaction that occurs inside of it.
To do this, suppose that you measure exactly 43.5 mL of cool water at 22.0°C and
place it into a calorimeter. Then you add 21.0 mL of warm water (initial temperature
of 37.0°C) to the calorimeter. The final temperature of the entire system is 25.5°C.
Compute the heat capacity of the calorimeter in J K–1 assuming that no heat leaks
into or out of the calorimeter.
Answers
The heat capacity of the calorimeter is 16.8 J/K.
What is the heat capacity of the calorimeter?Now we know that the calorimeter is a device from which there is no heat loss or gain. In this case, the heat lost by the hot water is equal to the heat gained by the calorimeter.
Thus;
cwθ = ccθ
Where;
cc= heat capacity of the calorimeter
cw = heat capacity of water
θ == temperature change
Hence;
4.2 * (37 - 25) = cc (25 - 22)
cc = 4.2 * (37 - 25)/(25 - 22)
cc = 16.8 J/K
Learn more about heat capacity:https://brainly.com/question/1747943
#SPJ1
Once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 J, and its potential energy decreases to
Answers
Once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 J, and its potential energy decreases to zero.
What is potential energy?Potential energy is a type of energy that is stored and depends upon the relative height of system. If its height is increased, the potential energy is also increases while on the other hand, if the body comes to the surface of the earth, its potential energy will be zero due to no height of the object. We know that potential energy is equals to product of mass, gravity and height of an object.
So we can conclude that if the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 J, and its potential energy decreases to zero.
list the 3 pKa's for H3PO4
Answers
Answer:
The three pKa values for phosphoric acid (H3PO4) are 2.12, 7.21, and 12.32.
Chloroform has a density of 1.483g/ml. A sample of chloroform has a volume of 1.93 liters. How many kilograms does it weight?
Answers
Weight of Chloroform : = 2.862 kg
Further explanationGiven
Density 1.483 g/ml
Volume = 1.93 L
Required
Weight of Chloroform
Solution
Density is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
Density formula:
\(\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}\)
ρ = density
m = mass
v = volume
Convert density to kg/L :
=1.483g/ml = 1.483 kg/L
So the weight(mass) :
= ρ x V
= 1.483 kg/L x 1.93 L
= 2.862 kg
4. a. If you used a test tube with a small opening instead of a beaker or evaporating dish, how might it affect your results? b. Suppose that you heated a sample of a hydrated ionic compound in a test tube. What might you expect to see inside, near the mouth of the test tube? Explain.
Answers
Which scientist is known for developing the planetary model of the atom?
Answers
Answer: Neils Bohr
Explanation: Development of the Atomic Theory. In 1913, Neils Bohr, a student of Rutherford 's, developed a new model of the atom. He proposed that electrons are arranged in concentric circular orbits around the nucleus. This model is patterned on the solar system and is known as the planetary model.
Compared to the number of electron shells and radius of an aluminum atom in the ground state a boron atom in the ground state has ?
Answers
Fewer electron shells exist for boron. Smaller radius results from fewer electron shells.
The total distance from an atom's nucleus to its outermost electron orbital is typically defined as the atomic radius. It can be described more simply as something akin to the radius of a circle, with the nucleus acting as the circle's centre and the outermost orbital of the electron as the circle's perimeter. Trends that help explain how atomic radii change start to appear as you start moving across or down the periodic table. The radius of atoms increases as you move down a particular group in the periodic table of elements because an atom grows larger as the number of electronic shells increases. In general, when you move from the left to the right of a particular period, an atom's size will decrease.
Let's start by looking up aluminium and boron on our reference table's periodic table. The numbers 13 and 5 correspond to aluminium (Al) and boron (B).
While boron is in the second period and has two electron shells, aluminium is in the third period (row) and has three. Borium thus has fewer electron shells. Smaller radius results from fewer electron shells.
For more such questions on electrons , Refer:
https://brainly.com/question/371590
#SPJ4
if 84.9 grams of solid iron reacts with oxygen gas, how many molecules of oxygen will react
Answers
Answer:
Molecules of oxygen \(= 6.86 * 10^{23}\)
Explanation:
The balanced equation of reaction between iron and oxygen is
4 Fe + 3 O2 → 2 Fe2O3
4 moles of iron react with 3 moles of oxygen.
Mass of one mole of iron is 55.845
number of iron moles in 84.9 grams of solid iron is equal to
\(\frac{84.9}{55.845} \\= 1.52\)
Now 1 mole of iron will react with \(\frac{3}{4} = 0.75\) mole of oxygen
Thus 1.52 moles of iron will react with \(0.75 * 1.52 = 1.14\) moles of oxygen
Number of atoms of oxygen in 1.14 moles
\(1.14* 6.02 * 10^{23}\\\)
\(= 6.86 * 10^{23}\)
What are chalcogenes? In chemistry
Answers
Answer:
The chalcogens are the elements that belong to group 16 of the modern periodic table (or the oxygen family). Chalcogens consist of five elements – oxygen, sulfur, selenium, tellurium, and polonium.
The chalcogens (ore forming) are the chemical elements in group 16 of the periodic table. This group is also known as the oxygen family. Group 16 consists of the elements oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and the radioactive elements polonium (Po) and livermorium (Lv).Explanation:
What is the ratio
amount (mol) Fatoms
amount (mol) Xe atoms
Enter your answer as an integer.
Pls help
Answers
Answer:
Empirical formula
Explanation:
The empirical formula of a compound is the simplest whole number ratio of atoms of each element in the compound. It is determined using data from experiments and therefore empirical.
Identify the substance that has formula mass of 133.5amu.
(a) MgCI
b)SCI
c)BCI
D) AICI
Answers
The calculated formula masses to 133.5 amu, we find that the substance with a formula mass closest to 133.5 amu is (d) AlCl3. Therefore, the answer is option D.
To identify the substance with a formula mass of 133.5 amu, we need to calculate the formula mass of each given substance and compare it to 133.5 amu.
(a) MgCl2:
The formula mass of MgCl2 can be calculated by adding the atomic masses of magnesium (Mg) and chlorine (Cl).
Mg: atomic mass = 24.31 amu
Cl: atomic mass = 35.45 amu
Formula mass of MgCl2 = (24.31 amu) + 2(35.45 amu) = 95.21 amu
(b) SCl:
The formula mass of SCl can be calculated by adding the atomic masses of sulfur (S) and chlorine (Cl).
S: atomic mass = 32.07 amu
Cl: atomic mass = 35.45 amu
Formula mass of SCl = 32.07 amu + 35.45 amu = 67.52 amu
(c) BCl:
The formula mass of BCl can be calculated by adding the atomic mass of boron (B) and chlorine (Cl).
B: atomic mass = 10.81 amu
Cl: atomic mass = 35.45 amu
Formula mass of BCl = 10.81 amu + 35.45 amu = 46.26 amu
(d) AlCl3:
The formula mass of AlCl3 can be calculated by adding the atomic mass of aluminum (Al) and 3 times the atomic mass of chlorine (Cl).
Al: atomic mass = 26.98 amu
Cl: atomic mass = 35.45 amu
Formula mass of AlCl3 = 26.98 amu + 3(35.45 amu) = 133.78 amu. Option D
For more such questions on masses visit:
https://brainly.com/question/24191825
#SPJ8
What is the density if 3.0 0ML has a mass of 3.85 G
Answers
Answer:
1.28 g/mLExplanation:
The density of a substance can be found by using the formula
\(density = \frac{mass}{volume} \\\)
From the question we have
\(density = \frac{3.85}{3.0} \\ = 1.28333...\)
We have the final answer as
1.28 g/mLHope this helps you
ncreased biotechnology has:
decreased the use of synthetic pesticides.
increased the chemical content of fruits and vegetables.
created new, devastating plant diseases.
made farming less profitable.
Answers
Increased biotechnology has decreased the use of synthetic pesticides and made farming more efficient and profitable. However, there have been concerns about the potential increase in the chemical content of fruits and vegetables due to the use of genetically modified crops.
There is a risk of creating new plant diseases through biotechnology, which could have devastating effects on agriculture. Overall, while biotechnology has brought many benefits to the agricultural industry, it is important to continue to monitor and address potential risks associated with its use.
Decreased the use of synthetic pesticides is the main application of it.
Biotechnology has allowed for the development of genetically modified (GM) crops that are resistant to pests, diseases, and harsh environmental conditions. This has led to a reduction in the reliance on synthetic pesticides, promoting more sustainable and environmentally-friendly agricultural practices.
For more such questions on Increased biotechnology , Visit:
https://brainly.com/question/1311372
#SPJ11
g the main cause of the increase in the amount of co2 in earth's atmosphere over the past 170 years is . increased infrared radiation absorption by the atmosphere increased worldwide fertilizer production increased worldwide primary production the burning of fossil fuels and deforestatio
Answers
the main cause of the increase in the amount of co2 in earth's atmosphere over the past 170 years is . increased infrared radiation absorption by the atmosphere increased worldwide fertilizer production increased
the burning of larger amounts of wood and fossil fuels
An extracted and burned fossil fuel[a] is a hydrocarbon-containing substance that naturally originated in the Earth's crust from the remains of extinct plants and animals. Coal, oil, and natural gas are the three primary fossil fuels. Fossil fuels can be used to produce energy, power engines (like internal combustion engines in cars), or supply heat for immediate use (such for cooking or heating). Before burning, some fossil fuels are processed to produce derivatives like kerosene, gasoline, and propane. The anaerobic decomposition of buried deceased animals that contained organic molecules produced by photosynthesis is the source of fossil fuels. [4] The geological process that transforms these elements into high-carbon fossil fuels often takes millions of years.
Learn more about fossil fuel here:
https://brainly.com/question/3371055
#SPJ4
a gallon of paint. covers an average of 20.0m^2 of surface. The paint costs $10.00 per gallon. What is the cost of the paint needed to cover a surface that is 108.0ft long by 10.0ft wide?
Answers
Answer:
60 dollars.-
Explanation:
1 meter = 3.28 feet
1 square meter = 3.28^2 feet^2
1 square meter = 10.7584 square feet.
20 square meters = 10.7584 * 20 = 215.168 square feet.
The area to be painted is 108.0 * 10.0 = 1080 square feet
The number of cans of paint needed = 1080/215.168
The number of cans of paint needed = 5.09 cans
Even with so little above 5, you have to round up. So it is 6 cans of paint needed.
1 can of paint costs 10 dollars.
6 cans of paint costs 6 * 10 = 60 dollars
Three blocks of the same mass are placed in front of you. Block A has a volume of
3.0 cm", block B of 5.0 cm', and block C of 10.0 cm. Which has the higher
density?
Answers
Given :
Three block of same mass name A , B and C .
Sides of block A , B and C is 3.0 cm , 5.0 cm and 10.0 cm .
To Find :
Which block has the higher density .
Solution :
We know , density \(\rho\) is given by :
\(\rho=\dfrac{M}{V}\) ......1 )
Here , V is volume .
Now , volume V for cube is given :
\(V=a^3\) .......2 )
( Here , a is the side of cube )
Now ,form equation 1 we can see if mass remains constant then density decrease with increase in volume.
Therefore , cube with minimum side will have higher density , in this case it is 3 cm block .
Hence , this is the required solution .
HELP PLSSS
Why is the water cycle important for ecosystems?
A. The water cycle helps plants keep and store water. The cycle makes sure that water stays at earth's surface and is available to ecosystems.
B. The water cycle photosynthesis to make clouds. These clouds make surface water that animals drink to survive in there ecosystem.
C. The water cycle permanently removes water from the underground and from large bodies of water and transports it to terrestrial ecosystems
D. The water cycle helps recycle and transport water around the planet. The cycle replenishes the water supply of ecosystems.
Answers
Answer:
The water cycle is often taught as a simple circular cycle of evaporation, condensation, and precipitation. Although this can be a useful ...
Explanation:
Answer: Your answer will be D)
Explanation: Hope this helped
a. Covalent
b. Metals
46.
44. Bonds formed by gaining and losing electrons are called
45.
have 3 or fewer valence electrons.
47.
c. Ionic
d. Nonmetals
48. A
e. Subscript
f. Electrons
tend to gain or take electrons.
bonds are formed when electrons are shared.
bonds.
is used in a formula to tell the number of atoms of an element
in a compound.
49. Chemical reactivity or stability depends on the number of_
outer energy levels.
in the
Answers
46. Covalent bonds are formed by sharing electrons between atoms.
Covalent bonds are chemical bonds formed when two atoms share electrons. They occur between nonmetal atoms and involve the sharing of electron pairs, resulting in the formation of a stable molecule. Covalent bonds are typically found in molecular compounds.
47. Ionic bonds are formed by gaining or losing electrons between metals and nonmetals.
48. A subscript is used in a formula to indicate the number of atoms of an element in a compound.
49. Chemical reactivity or stability depends on the number of outer energy levels (valence shells) in atoms.
Learn more about covalent bonds, here:
https://brainly.com/question/19382448
#SPJ1
Which strand of hydrocarbons is used to produce plastic?
O Strand 2
O Strand 3
O Strand 4
●Strand 1
Answers
The strand 1 of hydrocarbons is used to produce plastic, hence option D is correct.
Raw resources like natural gas, oil, or plants that have been processed into ethane and propane are used to make plastics. The subsequent "cracking" procedure uses heat to transform ethane and propane into ethylene and propylene. To produce various polymers, these components are mixed.
Propylene is a substance found in large quantities in petroleum. In order to speed up chemical processes, refiners combine heated propylene with a catalyst to create plastic. Propylene molecules start to cluster together like beads on a thread as a result.
Learn more about plastic, here:
https://brainly.com/question/28420086
#SPJ1
An element that can be placed in group 1 or 6 in periodic tables of elements
Answers
The alkali metals hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (F) are found in Group 1A of the periodic table (Fr).
Why is it known as a periodic table?Because of the orderly arrangement of the elements, it is known as the periodic table. They're arranged in rows and columns, as you'll see. The vertical columns that go from top to bottom and the horizontal rows that travel from left to right are referred to as Periods and Groups, respectively.
Why is the periodic table important?All known elements are grouped together in the periodic table of elements into groups with related properties. As a result, it becomes a vital tool for chemists, nanotechnologists, and other researchers. If you can utilize and understand the periodic table, you can predict how compounds will react.
To know more about Periodic Table visit:
https://brainly.com/question/11155928
#SPJ9
1.....What are the 2 major divisions of Biochemistry?
O Inorganic and Covalent
O Organic and Nucleic
O Inorganic and lonic
O Organic and Inorganic
Answers
Answer:
Organic and inorganic
Explanation:
Explain how a rainbow is produced
Answers
A rainbow is produced through a proces that includes refraction, reflection, and dispersion of sunlight.
What more should you know about the production of rainbows?A rainbow is formed when sulinght is refracted and reflected by rain drops in the atmospher.
The sunlight is split into its component colors, which is why rainbows appear as having an array of colors. This is due to each color being bent by a different amount during refraction.
The colors of a rainbow are always in the same order, with red on the outside and violet on the inside.
Find more exercises on rainbows;
https://brainly.com/question/7965811
#SPJ1
According to the Clausius theorem, the cyclic integral of
for a reversible cycle is zero.
Answers
Answer:
Yes it is true
Explanation:
This is because the Clausius theorem states that The cyclic integral always has two defined results. The results include it being less than or equal to zero under certain conditions.
When the system consists of only reversible processes, the cyclic integral is equal to zero. If it consists of and irreversible processes, the integral is usually less than zero.
d. The oxidation number of iron in +3
Identify the following as ionic or covalent (Ionic-A, Covalent=B)
16. LICI
17. SOA
18. NaCl
19. CaO
20. NO
Answers
NaCl is ionic compound and CaO,NO is covalent compound.
An ionic compound is formed by ions made up of charged particles.A covalent compound is formed by sharing of electrons between two different elements.Lithium is of the smallest size in group-I so, so its polarizing power is very high so it has a covalent character.NaCl exists as an ionic compound as it is formed on basis of electrostatic attraction.NO exists as N=O which is a covalent compound due to high polarising power.CaO exists as a covalent compound due to high polarising power.Ionic compounds are formed due to electrostatic attraction and covalent compounds by sharing of electrons.
To learn more about ionic compound visit:
brainly.com/question/9167977
#SPJ9
If an ideal gas has a pressure of 5.87 atm,
a temperature of 26.86 ∘C,
and a volume of 77.31 L,
how many moles of gas are in the sample?
Answers
Answer:
5.87/26.86=77.31/...Explanation:
after solving this u can find the answer in easy way
Which choice correctly describes the energy transfer in one food chain of this partial food web?
a Energy is transferred from the energy from white spruce to spruce grouse to lynx.
b Energy is transferred from soapberries to snowshoe hare to lynx.
c Energy is transferred from lynx to red squirrel to white spruce.
d Energy is transferred from soapberries to red squirrels to coyotes to lynxes.
Answers
Answer:
energy is transfered from white spruce,Sprouse grouse,lynx
Read the following statement:
Energy cannot be created or destroyed.
Does the statement describe a scientific law? (3 points)
a
No, because it universally applies to all objects
b
No, because it is not true in all circumstances
c
Yes, because it universally applies to all objects
d
Yes, because it is not true in all circumstances
Answers
Answer:
C. yes, because it is universally applies to all objects
45. Assume that 0.504 g of H₂ gas at STP reacts with
excess CuO according to the following equation:
Cuo(s) + H₂(g) → Cu(s) + H₂O(g)
Make sure the equation is balanced before beginning
your calculations.
a. How many liters of H₂ react?
b. How many moles of Cu are produced?
C. How many grams of Cu are produced?
Answers
CuO(s) + H2(g) → Cu(s) + H2O(g)
a. To find the volume of H2 gas at STP, we can use the ideal gas law:
PV = nRT
At STP, the pressure (P) is 1 atm and the temperature (T) is 273 K. The volume (V) of 1 mole of gas at STP is 22.4 L. So, the number of moles (n) of H2 gas is:
n = PV/RT = (1 atm) x V/(0.0821 L·atm/mol·K x 273 K) = V/22.4
We know that 0.504 g of H2 gas reacts. The molar mass of H2 is 2 g/mol. So, the number of moles of H2 gas is:
n = m/M = 0.504 g/2 g/mol = 0.252 mol
Now we can find the volume of H2 gas:
V = n x 22.4 L/mol = 0.252 mol x 22.4 L/mol = 5.65 L
Therefore, 5.65 liters of H2 gas react.
b. From the balanced equation, we can see that the mole ratio of CuO to Cu is 1:1. So, the number of moles of Cu produced is also 0.252 mol.
c. To find the mass of Cu produced, we can use the molar mass of Cu, which is 63.5 g/mol:
mass of Cu = number of moles of Cu x molar mass of Cu
= 0.252 mol x 63.5 g/mol
= 16.02 g
Therefore, 16.02 grams of Cu are produced.
labeled test dna with cy5 (red) - labeled reference dna on a normal chromosome spread revealed a bright red signal along the short arm of chromosome 3.
Answers
This statement is referring to a laboratory experiment in molecular biology or genetics where DNA has been labeled with the fluorescent dye Cy5, which emits a red signal when excited by light. The experiment has revealed that the labeled DNA (in this case, the test DNA) is present along the short arm of chromosome 3. This information can be used to study the location of specific genes or other genetic elements on the chromosome. The use of the reference DNA allows for the comparison of the test DNA to a known and well-characterized reference, which can provide additional information about the identity and location of the test DNA.
Answer:
This labeling information suggests that the test DNA, which was labeled with the dye Cy5 (red), is present along the short arm of chromosome 3 in the reference DNA sample. The bright red signal indicates a high concentration of the labeled test DNA in that region, which could indicate that the test DNA is interacting with or mapping to that specific location on chromosome 3. This information can be used in various genomic studies, such as genome mapping, gene expression analysis, and chromatin analysis, to better understand the distribution and function of specific DNA sequences in the genome.
Explanation:
Just tell me if you kinda confuse
ALLEN
Which compound has the highest melting point?
Al2(CO3)3
C12H22O11
C8H18
H2O
Answers
Answer:
Al2(CO3)3 (A)
Explanation:
i think thats the answer
Aluminum carbonate is indeed a carbonate solution of aluminum that is intended for oral intake. It should be the carbonate salt type of aluminum that's also intended for oral consumption.
It is used to alleviate the symptoms of excess stomach acid in situations like heartburn, acid reflux, acid indigestion, upset stomach, or stomach ulcers.It is a water-insoluble Aluminum source that, when heated, rapidly converts to other Aluminum complexes like oxide.Therefore, the answer is "\(\bold{Al_2(CO_3)_3}\) ".
Learn more:
brainly.com/question/12232746