Answer:
Well I think that the frogs ability to breath underwater is a adaptation to help them from prededors. Also, they have camophlage to help too.
4. Question: What effect does the amount of light have on plant growth?
true or false???????????
Answer:
false
Explanation:
longer the wave length less frequency
What is the formula mass for (NH4)2C2O4
Answer:
124.1 g/mol
Explanation:
just facts
Answer:
124.1 g/mol
Explanation:
To calculate formula mass, multiply the subscript of each element in the formula by the element's atomic weight (relative atomic mass) found on the periodic table. The unit for formula mass is either u or Da (Daltons).
Pablo and Charles were conducting an investigation where they were measuring the energy of a glass marble as it rolled down a ramp. According to their calculations, the total energy of the marble decreased.
Which statement below is the best explanation for the decrease in total energy?
a.The energy decreased because it was destroyed by the interaction with the ramp.
b. The total amount of energy always decreases in an energy conversion and is expected.
c. The scientists’ calculations were incorrect; the energy totals should have been the same.
d. The energy decreased because heat resulted from the friction between the marble and the ramp.
Answer:
c. The scientists’ calculations were incorrect; the energy totals should have been the same.
Explanation:
We must remember that energy can not be created nor destroyed according to the law of conservation of mechanical energy.
The total energy of a body remains a constant throughout its motion. For a body rolling down a ramp, the energy changes from potential to kinetic + potential and then to kinetic.
In all of these stages of its motion, the total energy of the glass marble remains constant.
Answer:
b
Explanation:
b
what affect does temputure has on solid
Answer:
As the temperature of a solid, liquid or gas increases, the particles move more rapidly. As the temperature falls, the particles slow down. If a liquid is cooled sufficiently, it forms a solid. If a liquid is heated sufficiently, it forms a gas.
a goup of cells that work together to perform a specific function.
Answer:
Cell Differentiation and Tissue.
Explanation:
tissues are organized communities of cells that work together to carry out a specific function.
what element has the basis of life
What is the relationship between temperature and pressure
in the following chemical reaction between H_2 and Cl_2 to produce HCl, what is the sum of the mass of HCl produced plus the mass of left over reactants when 0.40 g of H_2 completely reacts with 12.35 g of Cl_2?
H_2(g) + Cl_2(g) → 2HCl(g)
Answer:
Left over mass of hydrogen = 0.06 g
Mass of HCl produced = 12.41 g
Explanation:
Given data:
Mass of H₂ = 0.40 g
Mass of Cl₂ = 12.35 g
Mass of left over reactant = ?
Mass of HCl produced = ?
Solution:
Chemical equation:
H₂ + Cl₂ → 2HCl
Number of moles of H₂:
Number of moles = mass / molar mass
Number of moles = 0.40 g/ 2 g/mol
Number of moles = 0.2 mol
Number of moles of Cl₂:
Number of moles = mass / molar mass
Number of moles = 12.35 g/ 71 g/mol
Number of moles = 0.17 mol
Now we will compare the moles of HCl with H₂ and Cl₂.
H₂ : HCl
1 : 2
0.2 : 2×0.2 = 0.4
Cl₂ : HCl
1 : 2
0.17 : 2 × 0.17 = 0.34
Chlorine is limiting reactant.
Mass of HCl produced:
Mass = number of moles × molar mass
Mass = 0.34 mol × 36.5 g/mol
Mass = 12.41 g
Leftover mass of hydrogen:
Cl₂ : H₂
1 : 1
0.17 : 0.17
Number of moles of H₂ react with Cl₂ are 0.17.
Moles remain unreacted = 0.2 - 0.17 = 0.03 mol
Mass left over:
Mass = number of moles × molar mass
Mass = 0.03 mol × 2 g/mol
Mass = 0.06 g
The sum of the mass of HCl produced plus the mass of left over reactants is:
Mass of hydrogen = 0.06 g
Mass of HCl = 12.41 g
Chemical ReactionGiven:
Mass of H₂ = 0.40 g
Mass of Cl₂ = 12.35 g
Mass of left over reactant = ?
Mass of HCl produced = ?
Chemical equation: H₂ + Cl₂ → 2HClNumber of moles of H₂:
Number of moles = mass / molar mass
Number of moles = 0.40 g/ 2 g/mol
Number of moles = 0.2 mol
Number of moles of Cl₂:
Number of moles = mass / molar mass
Number of moles = 12.35 g/ 71 g/mol
Number of moles = 0.17 mol
The moles of HCl with H₂ and Cl₂.
H₂ : HCl
1 : 2
0.2 : 2×0.2 = 0.4
Cl₂ : HCl
1 : 2
0.17 : 2 × 0.17 = 0.34
The chlorine is limiting reactant.
Mass of HCl produced:
Mass = number of moles × molar mass
Mass = 0.34 mol × 36.5 g/mol
Mass = 12.41 g
Leftover mass of hydrogen:
Cl₂ : H₂
1 : 1
0.17 : 0.17
Number of moles of H₂ react with Cl₂ are 0.17.
Moles remain unreacted = 0.2 - 0.17 = 0.03 mol
Mass left over:
Mass = number of moles × molar massMass = 0.03 mol × 2 g/molMass = 0.06 gLearn more about "Moles":
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HELP
True or false
a) All viruses are latent.
b) All viruses contain DNA.
c) Viruses are considered living things.
d) Viruses do not have organelles.
Answer: i think it c
Explanation:
Mixtures that have the same composition throughout are ________.
1. How many energy sublevels are in the second principal energy level? 4 3 1 2
Answer:
2
Explanation:
What is the Atomic number of 12
Answer:
atomic number of 12 is MG
Explanation:
Magnesium
Which of the following is not made up of atoms?
A. elements
B. molecules
C.
pure substances
D. subatomic particles
The sub-atomic particles are not made up of atoms, they have their own identity.
What are sub-atomic particles?Sub -atomic particles are defined as particles which compose an atom. A sub -atomic particle can be a composite particle composed of other particles or an elementary particle which is not composed of other particles.
The elementary particles are six flavors of quarks , six types of leptons and twelve gauge Bosons .All sub atomic particles have an electric charge which is an integer multiple of elementary charge.They are in smaller in size as compared to atoms.
The three fundamental sub-atomic particles are electrons , protons and neutrons . The smallest known sub-atomic particles to exist are called quarks. Neutrons and protons are the sub-atomic particles which reside in the nucleus and are together called as nucleons.
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If the hydronium ion concentration of a substance is 1.0 X 10-6 M, what would be the pH of that substance??
Show/Describe your work.
If you 0.123 moles of CO2 is placed at 300.1 K and 2.91 atm pressure. Determine its volume.
show with work
Answer:
1.04 L
Explanation:
If the human body contains 5.4 L of blood, how many grams of glucose are present in the blood if the concentration is 130. mg/100. mL?
Answer:
good luck
Explanation:
all energy travels in waves true or false
What is the mass of 0.25 mole of sodium?
g Mark the statements as True or False. (1) When mixing, NaOH(aq) and NH4NO3 (aq) can not complete their reaction because there is no precipitate formation. ______ (2) To quantify unknown soluble chloride, we could use either gravimetry or volumetric analysis based on AgCl(ppt) formation. _____
Answer:
Follows are the solution to this question
In point 1, the answer is "false".
In point 2, the answer is "True".
Explanation:
In point 1:
It's not a response to rain, however, the reaction is also another way.
[tex]NaOH + NH_4NO_3 \longrightarrow NaNO_3 + NH_3 +H_2O \\\\Na^{+} + OH^{-} + NH_4+ +NO_3^{-} \longrightarrow Na^{+} + NO_3^{-} +NH_3 +H_2O \\\\OH^{-} + NH_4^{+} \longrightarrow NH_3 +H_2O[/tex]
In point 2:
They either use the magnetic resonance or gravimetric analytical method with unknown chloride calculation. They utilize plaster to catalyze chloride through aqueous or salty water. It's also called the response to precipitation.
[tex]Ag+(aq) + Cl - (aq) \longrightarrow AgCl(s)[/tex]
20 POINTS
What is true about the Sun, light bulbs, and flames?
AThey are all made of fire.
BThey are all made by people.
CThey are all found in nature.
DThey are all sources of light energy.
Answer:
D
Explanation:
Light blubs are not made of fire.
The sun wasnt made by humans.
You cant find Light bulbs in nature.
Meaning it is D.
What element has 2 occupied principals of energy levels
9.Ammonium nitrate (NH4NO3) can decompose to form gaseous water, nitrogen, and oxygen. What is the sum of the coefficients in the balanced chemical equation
Answer:
the sum of the coefficients in the balanced chemical equation is 9
Explanation:
The computation of the sum of the coefficients in the balanced chemical equation is shown below:
here is the balanced chemical equation
[tex]2NH_4NO_3 \rightarrow 4H_2O)g) + 2N_2(g) + 1O_2(g)[/tex]
Now the sum is
= 2 + 4 + 2 + 1
= 9
hence, the sum of the coefficients in the balanced chemical equation is 9
and, the same is to be considered
Salt is water solution is made salt or water
Answer:
Both
Explanation:
because salt water comes from water mixing with salt
Which energy transformation produces electricity and is least likely to negatively impact the environment?
Generating electricity from a natural gas-fired power plant
Generating electricity from a natural gas-fired power plant
Generating electricity from a coal-fired power plant
Generating electricity from a coal-fired power plant
Generating electricity from a nuclear power plant
Generating electricity from a nuclear power plant
Generating electricity from a solar panel system
Generating electricity from a solar panel system
electricity from solar panels
Explanation:
All other options produce something after or during the time electricity is made. That something is gas. Not solar
Conduction is the transfer of heat in?
gases
liquids
solids
Answer:
solids
Explanation:
The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed below. Which of these elements is in this group?
Characteristics of a group of elements
•is shiny
•is solid at room temperature
•has atoms with two valence electrons
A-silicone
B-lithium
C-strontium
D-aluminum
Answer:
C:Strontium
Explanation:
Calculate the number of atoms present in .20 moles of H20.
Answer:
20 moles = (96.7+)
345%20 moles inter = h20
h2+345%20 moles
kalkadanc = jani+CARSORI
564 MOLES
Explanation
we have to plus the moles that we can get the answer and u should now the formula of kalkadanc and just % will get to the correct answer.
i think u may understand and this is the correct answer i had practice this too much
How do molecules of air in direct contact with Earth's solid, warm surface absorb heat energy?
A conduction
B condensation
C. convection
D. diffusion
Answer:
actually its c convection.
Explanation:
my teacher asked the same question but with diffrent oppstions.
and diffusion is DEFINATALY not the answer. its convection.
Molecules of air in direct contact with Earth's solid, warm surface absorb heat energy with conduction.
What is conduction ?The process by which heat is transmitted from an object's hotter end to its cooler end is known as conduction. The term "thermal conductivity" refers to an object's capacity to transfer heat, and it is represented by the letter k. Along a temperature gradient, heat flows naturally.
When two materials or objects come into direct touch with one another, conduction takes place. More quickly than in a cooler item, the molecules in a warmer one vibrate. The slower molecules clash with the faster vibrating molecules.
Ground-level heat is radiated into the lower atmosphere. In conduction, heat is transferred directly from hotter regions to cooler ones. Warmer molecules bounce vigorously and clash with molecules close by, exchanging energy.
Thus, option A is correct.
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What does the group number plus number of bonds equal?
It’s talking about the periodic table
Answer:
A stable compound with a complete octet or electronic configuration
Explanation:
The Periodic table is the arrangements of chemical elements in horizontal rows (called 'Periods') and vertical columns (called 'Groups') based on their various physical and chemical properties.
Elements in the same group have a common quality being that they have the same number of free (valent) electrons in their outermost shell. For example, elements in group 1 all have one valent electron in the outermost shell as compared to elements in group 5 which have five valent electrons in the outermost shell. Therefore the group number tells us the number of valence electrons of all the elements in that group.
Meanwhile, elements in the same period have the same number of outermost shell but an increasing number of valence electrons as one goes across the period from left to right.
Elements form chemical bonds in an effort to achieve chemical stability. Chemical stability is achieved when the shells of the elements are fully filled with electrons and achieved a stable electronic configuration of 2 or 8.
The type of bonds formed depend on the number of valence electrons available for bonding in the outermost shell of the element.
So the element Oxygen for example which has 6 valence electrons, in its outermost shell tends to form covalent bonds (a bond achieved by sharing electrons). It is easier for oxygen to form a covalent bond by sharing its valence electrons with another element than to lose all six valence electrons in order to achieve a stable octet state
The element Chlorine (Cl, with seven valence electrons) on the other hand tends to form electrovalent or ionic bonds by accepting an electron from a metal element like Sodium (Na) to achieve a complete octet. It is easier for Cl to achieve a stable octet state by accepting an electron than losing all 7 valence electrons.
Therefore, the group number (an indicator of the number of valence electrons in the outermost shell) plus the number of bonds formed equals a stable atom or compound with a complete electronic configuration.