Answer:
Mechanical waves travel through a medium and
Electromagnetic waves can travel through air and solid materials, but also through the vacuum of space.
Explanation:
True Or False? A magnet slows down because it created an opposing electric force as it fell.
Answer:
faules
Explanation:
truck it
Arrange the elements in order of increasing atomic radlus. Use the periodic table
the table
to locate the position of the elements in
Drag each tile to the correct box.
Tiles
barium
calcium
Oxygen
selenium
Sequernce
Answer:
Oxygen, Selenium, Calcium, Barium.
Explanation:
for plato user :)
Answer: Screen shot
Explanation:
Which part of an atom is used to form bonds with other atoms?
Answer:
valence electrons
Explanation:
valence electrons
The recessive trait disappears in a genetic cross.
True
or
False
Answer:
True
Explanation:
how many elements and atoms are in marble
Answer:
Explanation:
Scientists know that there are 6x1023 molecules in a mole - so we have about 0.5x1023 molecules in our marble…and since every silicon dioxide molecule has one atom of silicon and two of oxygen, we have a grand total of 1.5x1023 atoms. That's 150,000,000,000,000,000,000,000 atoms
Calculate the number of moles in 35.7 g of CH4
Answer:
[tex]\boxed {\boxed {\sf About \ 2.23 \ moles \ CH_4}}[/tex]
Explanation:
First, find the molar mass of CH₄
This compound is made of carbon (C) and hydrogen (H). Look on the Peirodic Table for the masses of both elements.
Carbon: 12.011 g/molHydrogen: 1.008 g/molNow, count the number of moles in the compound. There is no subscript on C, indicating 1 mole. There is a subscript of 4 on H, indicating 4 moles. We must multiply the molar mass of hydrogen by 4.
1 Carbon: 12.011 g/mol 4 Hydrogen: (4 * 1.008 g/mol)= 4.032 g/molAdd the 2 masses.
12.011 g/mol + 4.032 g/mol = 16.043 g/molNext, find the number of moles in 35.7 grams.
Use the molar mass of CH₄ as a ratio.
[tex]\frac{16.043 \ g \ CH_4}{1 \ mol \ CH_4}[/tex]
Since we want the units of grams CH₄ to cancel when we multiply, we must flip the ratio.
[tex]\frac{1 \ mol \ CH_4}{16.043 \ g \ CH_4}[/tex]
Multiply by 35.7 grams.
[tex]35.7 \ g \ CH_4 *\frac{1 \ mol \ CH_4}{16.043 \ g \ CH_4}[/tex]
The grams of CH₄ will cancel each other out. Since there is a 1 in the numerator, we can also move 35.7 to the numerator.
[tex]35.7 *\frac{1 \ mol \ CH_4}{16.043 }[/tex]
[tex]\frac{35.7 \ mol \ CH_4}{16.043}[/tex]
[tex]2.22526959 \ mol \ CH_4[/tex]
The original measurement given, 35.7 grams, has 3 significant figures (3, 5, and 7), so we must round to 3 sig figs.
For this number, it is the hundredth place.
The 5 in the thousandth place tells us to round the 2 to a 3.
[tex]2.23 \ mol \ CH_4[/tex]
There are about 2.23 moles of CH₄ in 35.7 grams.
What mass of Cl2, in grams is contained in a 10.0L tank at 27oC and 3.50 atm pressure ? a. 1.42 grams b. 142 grams c. 1.01 kg d. 101 grams
Answer:
the correct answer is A
Explanation:
What is specific heat? How are the factors affecting it?
Answer:
Specific heat, ratio of the quantity of heat required to raise the temperature of a body one degree to that required to raise the temperature of an equal mass of water one degree.
Explanation:
by dividing the heat capacity by the quantity of substance in a body, the resulting specific heat capacity is a function of the structure of the substance itself. In particular, it depends on the number of degrees of freedom that are available to the particles in the substance, each of which type of freedom allows substance particles to store thermal energy.
is Boiling water a chemical or physical change?
♥answer♥
Physical
♥explanation♥
Physical changes alter only the size, shape, form or matter state of a material. Water boiling, melting ice, tearing paper, freezing water and crushing a can are all examples of physical changes.
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♥ お力になれて、嬉しいです！♥Protons + Neutrons =
Answer:
mass
Explanation:
Match the following family of elements to its group.
Explanation:
To solve this problem, we simply use the periodic table of elements which groups elements based on their atomic numbers.
The atomic number of an element is the number of protons it contains. The protons are the positively charged particles within an atom.
The vertical arrangement of elements on the periodic table is the group. The horizontal arrangement of elements is the period.Now;
Noble gases belongs to group 18
Alkali earth metals belongs to group 2
Halogens belongs to group 17
Alkali metals belongs to group 1
Transition metals belongs to group 3-12
The infections that people get while they are in hospitals are commonly resistant to multiple drugs. What is a reason for the increased number of drug-resistant bacteria being found in hospitals?
A.
increased use of antibiotics in hospitals
B.
increased number of diseases in patients
C.
decreased sanitation facilities in hospitals
D.
decreased microbial growth in hospitals
Explanation:
d
hdjdjdjdjejdjjeuwuwuw
Answer:
D
Explanation:
I have this test as well
any____has____sets of physical and chemical properties
is riding a bike potential energy or kinetic energy
Answer: Mechanical energy usually means the sum of the kinetic energy and potential energy. So when you ride your bike you hope that the muscular (chemical) energy is converted mainly into mechanical energy.
Explanation:
Answer:
Isn't it neither.
Explanation:Because potential is going up and kinetic is going down.
A radioactive nucleus can change from one element to another. How does this happen?
A radioactive decay is occurring by the emission of charged particles such alpha or beta to form a new stable atom with changes mass number and atomic number.
What is radioactive decay?Heavy unstable radioactive elements undergo nuclear decay by which they form a stable isotope or new atom with changed atomic number. There are two types of nuclear decays mainly. They are alpha decay and beta decay.
During alpha decay isotopes with higher mass number undergo alpha emission and forming a new species with mass number reduced by 4 units and atomic number reduced by 2 units.
In the case of beta- decay, electrons are emitted from the atom and then forming a new atom with atomic number increased by one unit. For an electron capture process, an electron is captured to the atom forming an element with atomic number reduced by one.
To find more on radioactive decay, refer here:
https://brainly.com/question/1770619
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How do I balance these?
Answer:
[tex]1S_{8} +12O_{2}=8SO_{3}[/tex]
[tex]2Al+6HCl=2AlCl_{3} +3H_{2}[/tex]
[tex]2Fe+3Cl_{2}=2FeCl_{3}[/tex]
[tex]2K+1Cl_{2}=2KCl[/tex]
Explanation:
A chemical bond I i which 2 pairs of electrons are shared between two atoms
Double Covalent Bond
atomic concept map. help me fill this out with the terms on the right. 40 points.
Answer:
can you like number them please? it would make it a lot easier
Explanation:
A coffee cup calorimeter contains 153.21 g of water at 22.50 °C. A 65.454 g piece of iron is heated to 101.62 °C. The piece of iron is added to the coffee cup caloriemter and the contents reach thermal equilibrium at 25.68 °C. The specific heat capacity of iron is 0.449 Jg·K and the specific heat capacity of water is 4.184 Jg·K. How much heat, , is lost by the piece of iron?
Answer:
Q = 2232J
Explanation:
In the system, the energy that is lost by the iron is:
Q = S*ΔT*m
Where Q is heat, S is specific heat of iron ΔT is change in temperature and m is mass of the piece of iron.
S = 0.449J/gK
ΔT = 101.62°C - 25.68°C = 75.94°C
m = 65.454g
Q = 0.449J/gK*75.94°C*65.454g
Q = 2232J
Is this equation balanced as is?
Ca(OH),
Cao
+
H,0
yes
no
Answer:
i think its yes
Explanation:
Answer: the answer is yes
Explanation: I know because I had it on my chemistry test yesterday
The density of iron is 7.6 grams per cubic centimeter. What volume would a 76-gram sample of iron fill? Density = Mass / Volumne
10 cm
1.0 cm
76 cm
O 7.6 cm
What is an intramolecular force?
Answer:
D. A force acting between the atoms within a molecule.
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Answer: rotation
Explanation:
orbitttttttttttt
Explanation:
Energy is the ability to do __________.
please;( urgent CuSO4•5H2O is blue
The sum of all forces acting on an object.
Answer:
net force. sjiejsnssjwjehw
Answer:
net force or result force
Explanation:
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12. Which noble gas is expected to show the largest deviations from the ideal gas
behavior?
A) helium
B) neon
C) argon
D) krypton
E) xenon
1. The diagram models the forces acting on a box. 2N 2N- Box - 2 N 5 N Which of the following best describes the motion of the box?
Answer: The box is moving downward with increasing speed.
Explanation:
The diagram models the forces acting on a box. 2N 2N- Box - 2 N 5 N .The box is moving downward with increasing speed best describes the motion of the box.
What forces act on a box?The normal force acting on the box is equal to and opposite to its weight. This term equals the force of gravity when the box is on a level surface. To calculate the normal force of the box, use our given mass and gravity's acceleration.
When an object interacts with another object, it experiences a push or pull that causes it to change state, either from rest to uniform motion. It is a magnitude and direction vector quantity.
A representation of the forces acting on the object. The object is represented by a dot, and forces are represented by arrows pointing away from the dot. Force diagrams are another name for them.
Thus, The box is moving downward with increasing speed best describes the motion of the box.
To learn more about the force, follow the link;
https://brainly.com/question/13191643
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HELP ASAP EILL MAKE BRAINLEST Students are conducting a la estimating the time takes for the cell cycle in normal chocols They find that the average time for one complete el cycle is 22 hours What arence would they expect to see nerous chien
Cancerous chicken cels will spend more time in the phase
Cancerous cells will not complete all phases of the cell cyce
Cancerus chin cells will complete moss in a shorter amount of time
O Cancerous chicken cols and normales will have the same total amount of time to complete the cell cycle
Answer: I don't know if this helps but here's some information I think might help.
Usually, cells will take between 5 and 6 hours to complete S phase. G2 is shorter, lasting only 3 to 4 hours in most cells. In sum, then, interphase generally takes between 18 and 20 hours. Mitosis, during which the cell makes preparations for and completes cell division only takes about 2 hours. Calculate the percentage of time spent in each phase by counting the total number of cells in each phase (total in interphase, in prophase, etc.) and dividing each by the total number of cells you counted. How do cancer cells differ in total time required for mitosis? Cancer cells produce 117 minutes faster than regular cells. ... Normal cells require 640 minutes during interphase, cancer cells only need 380. For prophase, cancerous cells need 15 minutes less than regular cells. Another hallmark of cancer cells is their "replicative immortality," a fancy term for the fact that they can divide many more times than a normal cell of the body. In general, human cells can go through only about 40-60 rounds of division before they lose the capacity to divide, "grow old," and eventually die 3.
What is the potential energy of a 5 kg apple that is sitting on a 1.5 m high
tree branch? GPE=ham
Answer:
PE = 73.58 J
Explanation:
Given data:
Mass of apple = 5 Kg
Height of tree = 1.5 m
Potential energy = ?
Solution:
Formula:
PE = mgh
g = 9.81 m/s
by putting values,
PE = 5 Kg × 9.81 m/s × 1.5 m
PE = 73.58 J (Kgm²/s = J)