Answer: Resistance slows down the flow of charge in a circuit. The unit of resistance is the ohm (Ω) which is defined as a volt per ampere of current.
Explanation:
4. The radius of a hydrogen atom is 37 pm (1pm 10"m). How many hydrogen atoms lined up side to side would it take to make 1.00 inch? (Hint start with 1.00 inch)
Answer:
V = 4/3 * 3.1416 * (37x10-10)3
V = 2.12x10-25 cm3
d = m/V
d = 1.67x10-24 / 2.12x10-25 = 7.87 g/cm3
The difference in temperature, let's convert F to ºC:
ºC = -80-32/1.8 = -62.22 ºC
dT = -92.6 + 62.2 = -30.4 ºC
The number of hydrogen atoms lined up side to side to make 1.00 inch is equal to 3.43 × 10⁷ atoms when the radius of one H-atom is 37 pm.
What is the radius of a hydrogen atom?The atomic radius of a hydrogen atom is the distance between the center of the nucleus to the boundary of the electron that surrounds it.
Given, the radius of the hydrogen atom = 37pm
Then the diameter of the hydrogen atom = 37 + 37 = 74 pm
We know that 1 pm = 10⁻¹¹ m
Then the diameter of the one H - atom = 74 × 10⁻¹¹ m
The value of 1 m = 100 cm then the diameter of H-atom = 74 × 10⁻⁹ cm
As we know, the value of one inch = 2.52 cm
So, if 74 × 10⁻⁹ cm length takes H-atom = 1
Then, 2.52 cm would take hydrogen atoms = 2.52/ 74 × 10⁻⁹ = 3.43 × 10⁷
Therefore, 3.43 × 10⁷ hydrogen atoms lined up side to side to make 1.00 inch.
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Light
6CO2 + 6H20
CGH12O6 +602
Chlorophyll
The equation above describes the chemical reaction that occurs during
photosynthesis. What happens to the light energy that is shown in the reaction?
Answer:
Light energy acts as a catalyst that speeds up the rate of photosynthesis
Explanation:
When 5,946 J of heat is added to 79.75 grams of oil at 37˚C , the temperature increases to 64˚C. What is the specific heat of the oil?
Answer:cool kid
Explanation:cool kid
Which is a common way for a scientific calculator to show the number
below?
3*109
O A. 93
B. 9 * 103
C. 9E3
D. 3E9
Answer:
it can show it using the B method am i right
Which of the following best explains why bonds form between atoms?
A. Because the energy is at the minimum.
B. Because of the attractive forces between the nucleus of one atom and the electrons of the
atom.
other
C. Because atoms like to share electrons, which results in a stable system.
D. Because forming a bond fills up the valence shell of the atom giving a full octet.
19 Does ona moleculo of u
Answer:
D
Explanation:
I believe the answer is D because atoms are always seeking to fill up their outer electron shell/valence shell and want to gain a full octet.
write an Argument for people of westfield identifying the reddish brown substance. Plz answer this is due tomorrow!!
Answer:
The reddish-brown substance is a different color than the fertilizer, which is white, and the substance that makes up the pipe, which is gray. This means that they cannot be the same substance because they do not have the same properties. The atomic models show that the reddish-brown substance is made up of different repeating groups of atoms than the fertilizer and the pipe substance. The difference in atoms caused the difference in properties.
Explanation:
lul
People of westfield identifying the reddish brown substance and that substance is rust i.e. iron oxide.
What is rust?Rust is a chemical compound which is formed by the oxidation reaction between iron and oxygen for the formation of iron oxide.
People of westfield observed the reddish brown color in the water, that is the rust compound which is obtained by the chemical reaction occur between the iron pipes and the compound present in the fertilizers that are present in water.
Hence, the reddish brown substance in rust.
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10.0 points
When sodium azide is activated in an auto-
mobile airbag, nitrogen gas and sodium are
produced according to the equation
2 NaN_(s) —> Na(s) + 3N2(g).
If 0.12 mol of NaN3 reacts, what mass of
nitrogen would result?
Answer in units of g.
What are high tides caused by
Answer: the moons gravitational force
Explanation:
If excess sodium sulfate react with 36 g of iron (III) phosphate and produce a 65.0% yield of sodium phosphate, how many grams of sodium phosphate are actually produced?
[tex]Na_2SO_4 + FePO_4[/tex] -> [tex]Na_3PO_4 + Fe_2(SO_4)_3[/tex]
Answer:
According to the stoichiometry, the theoretical yield is 11.5 grams. Multiplying this by 0.650, you get 7.48 grams.
Explanation:
22) Name the neutral element with this orbital diagram.
Answer:
Sn (Tin)
Explanation:
What is chemical energy?
A.the potential energy in chemical compounds that is waiting to be released
B.energy that is formed or caused by movement
C.the movement of diecrons throughout the world
D. Energy from the son or any other light source
PLEASE ANSWER ALL I WILL GIVE BRAINLIEST PLEASE!!
PLEASE HELP ILL DO WHATEVER Bryan is doing a triathlon and you need to calculate his average speed for all three events. He swims 1km in 0.4 hrs. He rides his bike 50km in 1.5hrs and he runs 10km in 0.7 hrs.
Answer:
toda
Explanation:
:todo lo que tienes que hacer es hacer la cosa
Answer:
16.6km/h
Explanation:
Speed is distance/time.
speed for 1st event = 1/0.4 = 2.5km/h
speed for 2nd event = 50/1.5 = 33.3 km/h
speed for 3rd event = 10/0.7 = 14.28 km/h
Average speed = 2.5 + 33.3 + 14.28 /3 = 50/3 = 16.6 km/h
How does heat transfer through conduction?
from the warm object to the cool object
D) from the cool object to the warm object
from the warm object into the air
from the air to the cool object
Answer:
from the warm object to the cool object
Explanation:
Think of heat as a straight line, and the warmer the object the higher its gradient. Now, if you have cold object is lower in heat energy, the heat energy from the warm object will go down the gradient to the cool object. Note, in conduction, there must a contact between the two objects.
The metal lid is stuck on a glass jar of jelly. Why does running hot water over the lid help you get the lid off? *
a. Thermal expansion causes the lid to expand making it easier to remove.
b. The heat chemically changes the glue around the edge releasing the lid from the jar.
c. The heat warms the jelly causing it to push the lid off the jar.
d. The heat makes the jar contract making it easier to remove.
Answer:
A, because as metal warms, it expands, and makes it easier to remove
Explanation:
^^
A rock has a mass of 15 grams and a
volume of 3 cm3. What is the density of the
rock?
HINT; The formula for density is:
density =
mass (g)
volume (cm)
A А
B
5 g/cm3
18 g/cm3
45 g/cm3
Answer:
5 g/cm3
Explanation:
Density = mass/volume
density = 15g / 3 cm3 = 5g/cm3
Answer:
3.34 g/cm3
Explanation:
what is the chemical formula for stannic oxide
Answer:
SnO₂
Explanation:
the chemial formula for stannic oxide is SnO₂
How plants affect weathering?
Plants can grow in between rocks and break apart into smaller pieces.
Plants can prevent water from eroding rocks.
Plants can prevent wind from eroding rocks.
Plants can move rocks into smaller pieces.
Answer:
plants can grow in between rocks and break apart into smaller pieces
Explanation:
When red copper wire is heated on a Bunsen burner flame, the surface of the copper turns black. The wrong statement below is
A. The surface of the red copper wire turns black because copper oxide
is formed.
B. The surface of the red copper wire turns black because copper is
reduced.
C. When the copper wire that has turned black is placed in dilute
sulphuric acid, blue colour can be seen in the solution
D. Mass is increased after the copper wire has turned black
Answer:
I think d is wrong statement
Electrons make up most of the atom's mass. True or false ?
Answer:
No
Explanation:
Electrons have almost no mass so they cant make up the mass of an atom
How can you tell if two objects are in thermal equilibrium?
The objects have the same temperature.
The objects are touching each other.
The objects' temperatures are changing.
The objects are the same size.
Answer:
Two objects are in thermal equilibrium if they are in close contact that allows either to gain energy from the other.
Answer: The Objects have the same temperature
Explanation: i just took the test
What do you think is the primary reason why the Unionid mussel population declined whenever there is a dramatic increase in the Zebra mussel population?
Answer:
When the Zebra arrived they ate all the food so the Unionid mussels declined as they died from the lack of food. Causing the Zebra Zebra numbers to increase and Unionid numbers to decline.
How much energy does a wave with a frequency of 7.0 x 1012 Hz have
Answer:
4.64 × 10⁻²¹ J/s
Explanation:
[Only if the wave travels at the speed of light]
Because a wave presumed to be at light speed is a photon, E = hf.
If frequency is not given, E = hc/λ
c is the speed of light in meters per second. c = 299, 792, 458 m/s.
λ is the wavelength which is dependent.
h or plancks constant = 6.62607004 × 10⁻³² m² kg / s.
E is in units of J / s or jules ( m² kg ) per second.
If the wave has a frequency of 7.0 x 10¹² Hz or 7 THz (Tera-Hertz).
E = (6.62607004 × 10⁻³⁴) × (7.0 × 10¹²) =
46.38249028 × 10⁻²² =
4.638249028 × 10⁻²¹ J/s ≈
4.64 × 10⁻²¹ J/s
Which of the following statements best describes an animal impacting the hydrologic cycle?
OA.
When an animal breathes out, water vapor from inside the animal's lungs is released into the air.
ОВ.
Water from precipitation is absorbed into an animal's fur and is then released inside the animal's body.
OC
Water that an animal drinks to keep their body healthy is permanently removed from the hydrologic cycle.
OD
When an animal digs a burrow, it disrupts the environment and stops water from evaporating in that area.
Answer:
When an animal breathes out, water vapor from inside the animal's lungs is released into the air.
Explanation:
The hydrologic cycle is the cycle of water movement throughout the environment. A is the only only one that "recycles" water;
Passenger airplanes take off in the troposphere but can eventually move into
the stratosphere. The planes may remain in the stratosphere until it is time to
land. Why do you think planes fly in the stratosphere?
What is true of the mass and volume of all the floating objects?
Answer:
if the density is higher than water than the object will sink
Explanation:
is cobalt magnetic or no
Answer:
yes, it is a magnetic material
it can be attracted by a magnet
hope it helps
Answer:
yes ut is magnetic because it is metals
As you walk up a mountain air pressure?
1. increases
2. decreases
3. remains the same
Answer:
decreases
Explanation:
Answer:
Decreases
Explanation:
There is less gas molecules and the air gets thinner the higher up you go
What happens to the number of valence electrons as you move from element 1 to element 18 on the periodic table?
A)the number of valence electrons decreases
B)the number of valence electrons decreases then increases in a predictable sequence
C)the number of valence electrons increases
D)the number of valence electrons increases then decreases in a predictable sequence
Answer:
C
Explanation:
Answer: The answer is C
Explanation:
How many molecules are there in 3.20 grams of NH4SO2
Answer:
0.0389757845886336
Explanation: