Answer: Atoms aren't entirely empty space
Explanation:
Rutherford did his scatter experiment to disprove Thomson's Plum Pudding Model. Rutherford shot helium nuclei at a sheet of gold and expected the particles to all go straight through to a sensor. The reason he expected this was because Thomson said that atoms are mostly made of empty space. Not all the particles went through the gold sheet, a lot of them actually reflected back to him. This meant that atoms aren't entirely empty space and something had to deflect the helium nuclei
What is the chemical formula for the limiting reactant in the reaction shown? Write the balanced chemical equation for the reaction, using lowest whole-number coefficients.
1. What is the chemical formula for the limiting reactant in the reaction shown?
Answer: NO
2. Write the balanced chemical equation for the reaction, using lowest whole-number coefficients.
Answer: 2NO + 2H2 —-> 2H2O + N2
Taking into account the definition of limiting reagent and balanced reaction, you get:
NO is the limiting reagent.The balanced reaction is 2 NO + 2 H₂ → 2 H₂O + 1 N₂What is the chemical formula for the limiting reactant in the reaction shown?The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
The reagent in excess will be the one that is not completely exhausted during the reaction, that is, they are those that are partially consumed, "excess" amount of that reagent. This is because the amount of product obtained from the reaction will always depend on the amount of limiting reagent in the reaction.
In this case, you can see that you have two reactants: NO and H₂. Having 4 moles of NO and 5 moles of H₂, you can see that no moles of NO are present in the products, but there is 1 mole of H₂.
This indicates that NO is the limiting reagent, since it is completely consumed, while there is 1 mole of H₂ in excess.
In summary, NO is the limiting reagent.
Write the balanced chemical equation for the reaction, using lowest whole-number coefficients.Taking into account that the reagents are in stoichiometric proportions when the reagents are combined with each other without any of them, you can observe that the chemical equation is:
4 NO + 4 H₂ → 4 H₂O + 2 N₂
Dividing by 2 to get the lowest whole-number coefficients, the balanced chemical reaction is:
2 NO + 2 H₂ → 2 H₂O + 1 N₂
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https://brainly.com/question/15235721Which substance can be decomposed by chemical means? a. calcium b. argon c. sodium chloride d. aluminum
What are 2 mixtures
Air
Orange juice
Silver
Sodium chloride
Water
two atoms With diferent mass number but the same atomic number are called
Answer:
they are called isotopes
If an element gives away an electron, will it form a positive ion or a negative
ion?
Answer:
posotive
Explanation:
electrons give off negative pulse so take one away
Which statement is true because of Newton's second law?
Group of answer choices
You have to push a full shopping cart with more force than an empty shopping cart.
A soccer ball will not move until someone kicks it.
For every action there is an equal and opposite reaction.
A skateboarder travels at a constant speed when there are balanced forces acting on him.
Answer:
You have to push a shopping cart with more force than an empty shopping cart.
Explanation:
Hope this helps! Plz vote brainliest
A student sets up an experiment to test the factors that affect the
solubility of sodium chloride. The student places 5.Og of sodium chloride in
four beakers containing 250 mL of water. The student places each beaker
on a different hot plate and heats them to the following temperatures:
Beaker A: 30°C, Beaker B: 40°C, Beaker C: 50°C, Beaker D: 60°C. In which
beaker would the sodium chloride dissolve at the fastest rate? *
Beaker A
Beaker B
Beaker C
Beaker D
Answer:
Beaker D
Explanation:
Since Sodium Chloride melting point is 1,474°F (801°C) the logical possible answer would be D: 60C.
at the bottom of the ocean a rock has a mass 25 g. At sea level the same rock wilk have a mass of:
less than 25 g
more than 25 g
exactly 25 g
Answer:
exactly 25 g
Explanation:
The mass of an object is universally the same every where. Even in outer space.
This is because, mass is the amount of matter contained in a substance. Since there is no loss in the amount of matter, the mass of the body stays the same.
It is weight that is subjected to changes with the value of gravity. Weight differs from places to places. A place with higher gravity will have a higher value of weight for any given mass.Mass accounts for every individual matter present in a substance.
When they remain the same, mass does not change. Only a change in the amount of matter in a body can cause variation in mass.
Therefore, at the bottom of the ocean, a body will have the same mass as on top and even at sea level.
Answer:
c. exactly 25 g
Explanation:
Lara’s chemistry teacher has a decorative metal cube on her desk. The underside of the cube indicates that is made of stainless steel. However, Lara thinks it is too heavy to be this metal. She researches the density of stainless steel and finds it is 7.85g/cm³. She carries out this experiment to verify if the cube is actually made of stainless steel.
Answer:
D: 4, 5
Explanation:
What is the energy (ATP) from cellular respiration used for? Select all that are
correct.
option 1: movement
2: none of these answers are correct
3:growth
4:development
Answer:
1. movement
3. growth
4. development
Explanation:
ATP provides a source of chemical energy that powers all cell functions.
Any process in the body that requires energy relies on the conversion of ATP to ADP and the associated release of chemical energy. Therefore, movement, growth, and development all use ATP to take place.
what is the molecular equation to AgNO3 (aq) + H2S(aq)?
There are two forms of chemical equations
Ion equation: written in ion form (as separated ions) which forms the net ionic equation after removing an ion spectator
Molecular equation: written in molecular form
2AgNO₃(aq) + H₂S(aq) ⇒ Ag₂S(s) + 2HNO₃(aq)
The above reaction can be included in a double replacement reaction⇒ an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product
It can be shown the existence of the precipitation reaction, which is the formation of insoluble Ag₂S (not dissolve)
A bird on a long migration flies 63 kilometers per hour for 2900 kilometers. How long does he fly?
Answer:
46.031
Explanation:
easy stuff
what frequency does television channel 7 broadcast at?
Answer:
Channel 7's frequency is 117.5 MHz
Answer:
174 MHz - 180 MHz w/ center frequency of 177 MHz
Explanation:
216 - 174 = 42
42/7 = 6
6 + 174 = 180 - 7 - 177 MHz
180 + 6 = 186 - 8 - 183 MHz
186 + 6 = 192 - 9 - 189 MHz
192 + 6 = 198 - 10 - 195 MHz
198 + 6 = 204 - 11 - 201 MHz
204 + 6 = 210 - 12 - 207 MHz
210 + 6 = 216 - 13 - 213 MHz
Which of the following is not a physical property of a rock?
A. luster
B. electrical conductivity
C. melting point
D. density
Answer:
B
Explanation:
electrical conductivity of a rock cannot be determined by merely looking at the rock
Which family does this element belong to? It is a silvery-white, soft metal
that tarnishes rapidly in air and reacts with water, is a relatively soft metal
Alkali Metals
Alkaline Earth Metals
Halogens
Noble gases
Answer:
Alkali metals
hope it helps
PLEASE HELP
Chemical name for PbCl4
Answer:
Lead tetrachloride
Explanation:
A cell is a system
True
False
Answer: True
Explanation:
Tissues perform functions that are specializations of the normal function of individual cells.
Answer:
true
Explanation:
A cake recipe calls for 0.75 kg of butter. How many grams of butter would be needed for 4 cakes
Answer:
So if you divide the kg of butter and the cake that will be your answer and then you should have a fraction so the fraction would be 0.25 over 2 because you simplified it. 0.25/2
Explanation:
An ionic bond would form between which pairs of elements? atomic number 4 and atomic number 18 atomic number 7 and atomic number 8 atomic number 3 and atomic number 4 atomic number 8 and atomic number 12
Answer:
atomic number 8 and atomic number 12
Explanation:
atomic number 8 and atomic number 12 , element with the atomic number 8 is oxygen, and the element with atomic number 12 is Magnesium
Magnesium has low ionization energy, hence higher tendency to loose its two outermost electrons to form positive ion.
Oxygen has high electron affinity, hence higher tendency to accept or gain electrons to form negative ion.
The electronegativity difference between the element with atomic number 8 and element with atomic number 12 is greater for the formation of ionic bond
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the correct option is option C.
What is chemical Compound?
Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.
atomic number 8 =oxygen
atomic number 12= Magnesium
Magnesium has a low ionization energy and so a greater proclivity to lose its two outermost electrons to create a positive ion. Because oxygen has a high electron affinity, it is more likely to accept or acquire electrons to create a negative ion.
Therefore, the correct option is option C.
To learn more about chemical compound, here:
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The factors in a experiment that do not change
Answer:
The answer is Constant.
Which system works with the reproductive system? (Hint, its not C)
A. Endocrine system
B. Excretory system
C. Respiratory system
D. Skeletal system
Answer:
A
Explanation:
Option B, Excretory System
By mistake, a quart of oil was dumped into a swimming pool that measures 25.0 m by 30.0 m. The density of the oil was 0.750 g/cm3. Assuming the oil spread into a uniform, thin layer over the water, how thick was the oil slick?
The oil slick thick = 1.257 x 10⁻⁶ m
Further explanationVolume is a derivative quantity derived from the length of the principal
The unit of volume can be expressed in liters or milliliters or cubic meters
The volume of the aquarium is almost the same as the beam namely:
V = length x width x height
1.06 quart = 1 L
1 quart = 0.943 L=0.943 x 10⁺³ m³
volume of oil = volume of swimming pool
0.943 x 10⁺³ m³ = 25 x 30 x h
[tex]\tt h=\dfrac{V}{A}\\\\h=\dfrac{0.943\times 10^{-3}~m^3}{25\times 30~m^2}\\\\h=1.257\times 10^{-6}~m[/tex]
Mrs. K is trying to rearrange her living room. She uses 150 N of force to move a 600 g table. The table does not move. How much work is done?
90,000 J
4 J
600 J
0 J
Answer:
0J
Explanation:
Work = Force * Distance
Since the distance (or the displacement) in this problem is 0, hence, no work is done. W = 150*0 = 0. The mass of the object is just trying to trick you. Hopes this helps!
Which is most likely a molecule in a wall-filling material?
Answer:
C6H6
Explanation:
charge in the molecules of the wall material ,attracting and holding
Harry stores toxic chemical waste in a large steel tank that has only 15% of its volume underground. Jena lives in the wilderness and has her own gas pump connected to a 1,500-gallon tank of gasoline buried ten feet underground near her garage. Lars keeps three large tanks filled with formaldehyde and battery acid in his basement. Which of these people are covered by federal regulations regarding USTs?
Answer:
Only Harry and Jena
Explanation:
Under federal regulations, an UST is any one or a combination of tanks such that the volume of an accumulation of regulated substances is 10% or more beneath the surface of the ground.
Any UST system holding a mixture of hazardous waste and other regulated substances are also are not covered by federal regulations regarding USTs.
Farm or residential tank of capacity more than 11 gallons used for storing motor fuel is covered by federal regulations regarding USTs.
According to the given question,
Only Harry and Jena are covered by federal regulations regarding USTs.
Hydrogen’s emission spectrum includes a line of violet light that has a frequency of 7.31 x 1014 Hz. What is the energy (in joules) a photon of the violet light?
Select one:
a. 4.85 x 1019 J
b. 1.10 x 10-48 J
c. 9.06 x 10-49 J
d. 4.84 x 10-19 J
Answer:
Option D. 4.85×10¯¹⁹ J
Explanation:
From the question given above, the following data were obtained:
Frequency (f) = 7.31×10¹⁴ Hz.
Energy (E) =?
The energy of the photon of violet light can be obtained by using the following formula
E = hf
Where:
E is the energy.
h is the Planck's constant
F is the frequency.
Frequency (f) = 7.31×10¹⁴ Hz.
Planck's constant (h) = 6.63×10¯³⁴ Js
Energy (E) =..?
E = hf
E = 6.63×10¯³⁴ × 7.31×10¹⁴ Hz.
E = 4.85×10¯¹⁹ J
Therefore, the energy of the photon of the violent light is 4.85×10¯¹⁹ J
What properties of matter are the same for that substance no matter how much there is?
Answer:
physical properties
Explanation:
Intensive properties: A physical property that will be the same regardless of the amount of matter.
density: ρ=mv
color: The pigment or shade
conductivity: electricity to flow through the substance
malleability: if a substance can be flattened
luster: how shiny the substance looks
What is one Scientific Law or Scientific Theory that affects our life?
Answer:
Does the Big Bang theory count?
The expression 6.020 x 10^23
Answer:
3
Explanation:
9. Use dot and cross diagrams to represent the following compounds.
a. Sodium chloride (NaCl)
Answer:
I have attached the diagram
