Answer:
friction
Explanation:
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In an ideal situation where no heat energy is produced, what is the relationship between the chemical energy provided by the battery and the electrical energy produced according to the Law of Conservation of Energy?
Answer:
See explanation
Explanation:
The principle of conservation of energy states that energy can neither be created nor destroyed but can be converted from one form to another. Hence, chemical energy in a battery can be converted to electrical energy.
Usually, the conversion of energy from one form to another is not 100% efficient according to the second law of thermodynamics. Some energy is wasted in the process, sometimes as heat.
Hence, in an ideal situation where no heat energy is produced; all the chemical energy is converted to electrical energy (100% energy conversion). There will be no energy loss if no heat is produced.
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3. Connect to Technology How do probes,
including landers and rovers, improve our
ability to make observations of other planets?
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Crabs are organisms that have five pairs of legs. In certain species of crabs, the fifth pair of legs has a flattened, paddle-like shape. Which of the statements below best explains how this adaptation has evolved?
A.Crabs were exposed to a toxin in the water.
B.Crabs with this adaptation have an advantage over other crabs to defend against predators in oyster beds.
C.Crabs needed this adaptation to dig into sand to find food so they developed the flattened paddle-like shape.
D.Crabs developed this adaptation because they needed to climb mangrove trees to hide themselves from predators.
Answer:
A
Explanation:
Crabs were exposed to a toxin in the water.
Which adaptation allowed gymnosperms and angiosperms to become the most dominant types of plants on earth?
O pollen
O flowers
O seeds
O fruit
What mass of sodium phosphide would be needed to react fully with 5.4x1025 formula units of
strontium oxide?
Answer:
5974 g of Na₃P
Explanation:
We determine the reaction:
2Na₃P + 3SrO → 3Na₂O + Sr₃P₂
2 moles of sodium phosphide react to 3 moles of strontium oxide to produce 3 moles of sodium oxide and 1 mol of strontium phosphide.
We know that 1 mol of anything contains 6.02×10²³ formula units, so:
5.4×10²⁵ formula units . 1 mol/6.02×10²³ formula units = 89.7 moles
This is the amount we have, initially for SrO.
Ratio is 3:2. 3 moles of SrO react to 2 Na₃P
Then 89.7 moles of SrO may react to (89.7 . 2) /3 = 59.8 moles of Na₃P
We convert the moles to mass (mass . molecular weight)
59.8 mol . 99.9 g /mol = 5974 g
why is pluto classified as a dwarf planet?
Answer:
pluto is considered a dwarf planet because it did not meet the three criteria the IAU uses to define a full sized planet
Explanation:
What is the molarity of a solution made with 87g of Mgo dissolved in enough water to make
800mL of solution?
Answer:
2.70 M.
Explanation:
Molar mass of MgO = 24.3 + 16 = 40.3.
A molar solution will contain 40.3g in 1 Litre.
So 800 mL of 1 molar solution will contain 0.8* 40.3 g MgO.
So the molarity of the given solution
= 87 / (0.8*40.3)
= 2.699 M.
Which flows through the other?
What is the mass of 4.57 x 1021 molecules of ammonia (NH3)?
Answer:
4665.97
Explanation:
Write the complete nuclear symbol for a nucleus of oxygen with 8 protons & 10 neutrons?
Answer: The complete nuclear symbol will be [tex]_8^{18}\textrm {O}[/tex]
Explanation:
The nuclear symbol is written as: [tex]_Z^A\textrm {X}[/tex] where Z= atomic number , A = mass number X = symbol of element
Atomic number is defined as the number of protons or number of electrons that are present in an atom.
For an electrically neutral atom,
Atomic number = Number of electrons = Number of protons = 8
Mass number is defined as the sum of number of protons and neutrons that are present in an atom.
Mass number = Number of protons + Number of neutrons
Mass number = 8 + 10 = 18
Thus complete symbol will be [tex]_8^{18}\textrm {O}[/tex]
What happens with electrons when atoms form covalent bonds?
Answer:
Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.
Explanation:
number of elments in hcooh
Can yall help me with this one, thanks!
Answer:
Element atom molar mass Total % composition
Na 1 23 40 57.5 %
O 1 16 40 40%
H 1 1 40 2.5 %
The given compound is NaOH.
Na : number of atom= 1
Molar mass= 23 g/mol
Total mass of NaOH = 40 g/mol
% composition by mass = [tex]\frac{\text {mass of atom}}{\text {Total mass}}\times 100=\frac{23}{40}\times 100=57.5\%[/tex]
O : number of atom= 1
Molar mass= 16 g/mol
Total mass of NaOH = 40 g/mol
% composition by mass = [tex]\frac{\text {mass of atom}}{\text {Total mass}}\times 100=\frac{16}{40}\times 100=40\%[/tex]
H : number of atom= 1
Molar mass= 1 g/mol
Total mass of NaOH = 40 g/mol
% composition by mass = [tex]\frac{\text {mass of atom}}{\text {Total mass}}\times 100=\frac{1}{40}\times 100=2.5\%[/tex]
A single atom is in a balanced electrical state.
It has the same number of which pair of particle types?
electrons and neutrons
protons and electrons
neutrons and isotopes
protons and neutrons
If yeast is given more sugar will they undergo more
cellular respiration than yeast that is given less sugar?
Answer:
True
Explanation:
Cellular respiration is a metabolic pathway that allows cells to take apart food molecules and use their atoms as an energy source. This pathway takes electrons from food molecules and transfers them to oxygen, has energy transferred to ATP and arranges molecules into water, carbon dioxide and waste.
26. What are two water cycle processes not represented by arrows in this cross section?
1) transpiration and condensation 3) precipitation and freezing
2) evaporation and melting
4) runoff and infiltration
Answer:
4)
Explanation:
Metallic bonding is sometimes referred to as a "sea of electrons." I sometimes picture is as cheerios (nuclei) floating around in milk (valence electrons). And while metallic bonding has the name "bond" it can be very different from Ionic and Covalent Bonds.
In complete sentences describe how Metallic bonds are alike, and how they are different from the other bond types we have studied.
What properties can be used to identify puree substances?
Explanation:
1 it easily won't break down using any chemical
2 it is difficult to extract it using chemical process
mark me please
MULTIPLE CHOICE QUESTION
The difference between the smooth and rough ER is
that are attached to the outside of
ER.
the
the
ribosomes, smooth
DNA, rough
DNA, smooth
Answer:
???????
Explanation:
What is the H 2 : H2O molar ratio?
Answer:
The ratio of hydrogen atoms to oxygen atoms used to make water molecules is always 2:1, no matter how many water molecules are being made.
Explanation:
How many moles are there in 2.35x10^23 molecules of water
Answer:
0.39017 moles
Explanation:
a mole is 6.023×10^23
(2.35×10^23)÷(6.023×10^23)=0.39017
Calculate the given mass in 0.5 mol. Of CH4
Answer:
8 grams
Explanation:
The molar mass of CH4 is about 16 grams per mol. So you get the answer by mutlitplying 0.5 by 16, (cancel out moles by placing 1 on the bottom of the fraction).
Answer:
8 (g)
Explanation:
[tex]m= n * M[/tex]
m= 0.5*(12+1*4)=0.5*16 =8 (g)
Can you help me please
Answer:
11.5 or 11.52, depending on however many decimal places you round it to
Explanation:
the equation for mass ( using the specific heat capacity equation) is energy transferred divided by temperature change x the specific heat capacity.
so, we do 725 ÷ 32° (the temp change) x 2.03 = 11.52 or 11.5, depending on how many decimal places you round to
i would round to 2 decimal places, so the answer would be 11.52kg.
mass is measured in kg :) hope this helped.
How are plate tectonics and the rock cycle connected? Select the best answer from the choices below.
a
The rock cycle keeps the plates from moving too far apart
b
Igneous rocks that form from magma are a major part of the rock cycle
c
The heat from the mantle that fuels plate tectonics also drives the rock cycle
d
Plate tectonics causes sedimentary rocks to turn into metamorphic rocks
1. What do gram-formula mass and atomic mass have in common? How are they different?
neeed morreeeee help w science
Answer:
60
Explanation:
Answer:
its actually 83° rounding it so choose that
Hyperthermus butylicus is an aquatic prokaryote found near the coast of Portugal. It is found sand along the gas vents that release steam and carbon dioxide. In what domain would scientists classify this prokaryote?
A Eukarya
B Bacteria
C Archaea
D Fungi
If 27.3g of C8H18 is combusted, according to the equation below, what mass of water is produced?
2C8H18 + 25O2 --> 16CO2 + 18 H2O,
molar masses: C8H18 = 114.3 g/mol O2 = 32.0 g/mol CO2 = 44.0 g/mol H2O = 18.0 g/mol
Answer:
38.7 g
Explanation:
2C₈H₁₈ + 25O₂ → 16CO₂ + 18 H₂OFirst we convert 27.3 grams of C₈H₁₈ into moles, using the given molar mass:
27.3 g C₈H₁₈ ÷ 114.3 g/mol = 0.239 mol C₈H₁₈Then we convert 0.239 moles of C₈H₁₈ into moles of H₂O, using the stoichiometric coefficients of the reaction:
0.239 mol C₈H₁₈ * [tex]\frac{18molH_2O}{2molC_8H_{18}}[/tex] = 2.151 mol H₂OFinally we convert 2.151 moles of H₂O into grams, using water's molar mass:
2.151 mol H₂O * 18.0 g/mol = 38.7 gPlease Help! Brainliest!
Convert the following to milligrams: 5.6 x 10-4 kilograms. Show your work on a separate sheet of paper and attach
with your assignment.
Hi there!
Here's a picture to show you. Does this help?
Definition:This is a type of lab equipment in which students use probes, interfaces, and software for real-
time data acquisition, display, and analysis with a computer or calculator
What is the term?