Answer: C
Explanation:
The option that best explains why conservation of mass should be studied in a closed system is to prevent the release of any gases produced.
The law of conservation of mass states that mass can neither be created nor destroyed in a reaction, but can be converted from one form to another during the course of the reaction.
A closed system is one that cannot exchange matter with its surrounding while an open system is free to exchange both matter and energy with its surrounding.
When a system is opened, gaseous reactants of products may be lost to the surroundings and the mass will not be conserved as a result.
However, in a closed system, gaseous reactants or products remain within the system and the mass of the system before and after the reaction remains constant.
More on the law of conservation of mass can be found here: https://brainly.com/question/13383562
why do pipes split when they freeze
Answer:
Ice expands
Explanation:
when you freeze water, it expands. so when it freezes in a pipe it cant take the pressure
Which of the following is a property that nickel, iron, and cobalt DON'T share?
a) Shiny
b) Poor conductivity of electric current
c) Good conductivity of thermal current
d) None of the above
CANN YOU HELP ME PLEAAsee:((( it's due in 20 mins
Answer:
The answer is A! Hope you do Great!
Explanation:
calculate the energy processed by a single proton of the each following types electromagnetic radiation:
a.6.32 x 10^20 s-1
b. 9.50 x 10^13 hz
c.1.05 x10^16 s^-1
#G10 Chemistry
a. 4.2 x 10⁻¹³ J
b. 6.3 x 10⁻²⁰ J
c. 7 x 10⁻¹⁸ J
Further explanationRadiation energy is absorbed by photons
The energy in one photon can be formulated as
[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]
Where
h = Planck's constant (6,626.10⁻³⁴ Js)
f = Frequency of electromagnetic waves
a.
[tex]\tt E=6.626.10^{-34}\times 6.32.10^{20}=4.1876.10^{-13}~J[/tex]
b.
[tex]\tt E=6.626.10^{-34}\times 9.50.10^{13}=6.2947.10^{-20}~J[/tex]
c.
[tex]\tt E=6.626.10^{-34}\times 1.05.10^{16}=6.9573.10^{-18}~J[/tex]
I need help plzzz ahahnsnsnsn
Answer:
1=d
2=ricter scale
Explanation:
Elements that have a low force of attraction tend to have- a) High ionization energy and low electronegativity b) Low ionization energy and low electronegativity c) High ionization energy and high electronegativity d) Low ionization energy and high electronegativity
Answer:
Explanation:
Low electronegativity and low ionization energy
please help asap I will give brainiest
Answer:
12 = Lead
13 = red
Explanation:
12:
Given data:
Mass of metal = 143 g
Volume of metal = 12.6 cm³
Identity of metal = ?
Solution:
To check which metal is this we will calculate the density.
Formula:
d = m/v
d = 143 g/ 12.6 cm³
d = 11.3 g/cm³
The metal is lead.
13:
First of all we will calculate the densities of all liquid. The liquid with the highest density will form the bottom layer.
Blue:
d = m/v
d = 12 g/100 mL
d = 0.12 g/mL
Clear:
d = 10 g/ 100 mL
d = 0.1 g/mL
Red:
d = m/v
d = 15 g/100 mL
d = 0.15 g/mL
Yellow:
d = m/v
d = 13 g/ 100 mL
d = 0.13 g/mL
The density of red liquid is highest from all thus it will form bottom layer.
The graph below represents a function.
What is the value of f(4)
Answer:
I'm not sure if this is what your looking for but, the ordered pair would be 2,4
Explanation:
the line intercepts the y axis at point 2 and same on the x axis the line intercepts at 4
The graph below represents a function. The value of f(4) is -4
What is function?Function is defined as a phrase, rule, or law defining a relationship between one variable and another.
Functions are common in mathematics and are required for the formulation of physical relationships in the sciences.
There are various types of functions.
Liner functionIdentical functionQuadratic functionRational functionAlgebraic function Polynomial function Cubic function etc. and many moreThe value of f can be calculated by using formula
fx = 4 - x2
f(4) = 4 - 4 x 2
f(4) = 4 - 8
f(4) = -4
Thus, the graph below represents a function. The value of f(4) is -4
To learn more about function, refer to the link below:
https://brainly.com/question/12431044
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Neutrons and protons have the same relative mass (true or false)
electron configuration of yttrium
Answer:
[Kr] 4d1 5s2
Hope this helped :)
WHOEVER HELPS WILL GET BRANLIEST!! ONLY 5 QUESTIONS PLEASE HELP ME!!
1. Which element has 2 electrons in the 4s energy level
2. The ion with a 2- charge in the 3rd energy level
3. This nonmetal is likely to form an ion with a 3- charge that has the highest IN in the group
4. A metalloid in period 4 with 2 electrons in the p sub level
5. The smallest of the -2 ions
Answer:
1. is calcium 2,,,halogens 3 group 16 valence electrons non metal.4 .selenium
Explanation:
5. Palio atomic or monatomic hope tgis helps ig right give braniest
What is the electron configuration for Sulfur?
Answer:
[Ne] 3s² 3p⁴
Electrons per shell: 2,8,6
Atomic number: 16
Symbol: S
A scientist researching methods to convert used motor oil into gasoline would most likely be investigating which process?
joining molecules into longer chains
breaking molecules into smaller chains
changing straight chains into rings
changing rings into straight chains
Answer:
breaking molecules into smaller chains
Explanation:
A scientist researching methods to convert used motor oil into gasoline would most likely be investigating the process of breaking molecules into smaller chains.
How are molecules broken down?Larger molecules can be broken down into smaller molecules by breaking the bonds that hold them together.
According to this question, a scientist is trying to research methods to convert used motor oil into gasoline.
The most likely research methods that the scientists would use to investigate is the process of breaking molecules into smaller chains.
Learn more about breaking bonds at: https://brainly.com/question/14997036
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The pieces of land surrounded by water on all sides. *
Beaches
Barrier Islands
Delta
Tides
Answer:
Barrier Islands xtrvhb
Which of the following states of matter has a definite shape?
A solids and liquids only
B. liquids and gases only
C.solids only
D. liquids only
Answer:
A. Solids and liquids only
Explanation:
What is a good reducing agent?
A. A substance that is good at oxidizing another atom
B. A substance that is good at reducing another atom
C. A substance that is a good electron acceptor
D. A substance that is easily reduced in a reaction
Answer:
B. A substance that is good at reducing another atom
Explanation:
Reducing agents:
Reducing agents reduced the other element are it self gets oxidized. They have very low ionization energy and easily lose the electron.
Consider the following reactions.
4KI + 2CuCl₂ → 2CuI + I₂ + 4KCl
the oxidation state of copper is changed from +2 to +1 so copper get reduced. It means it gain one more electron.
CO + H₂O → CO₂ + H₂
the oxidation state of carbon is +2 on reactant side and on product side it becomes +4 so carbon get oxidized. Carbon loses it two more electron and act as reducing agent.
Oxidizing agents:
Oxidizing agents oxidize the other elements and itself gets reduced.
Oxidation:
Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.
Reduction:
Reduction involve the gain of electron and oxidation number is decreased.
what is the reason for the trend in the power of the nucleus going across a period?
Answer:
Please Mark as the Brainliest!!!!! PPPPPPPPPLLLLLLLLLSSSSSS
Explanation:
Across a period, effective nuclear charge increases as electron shielding remains constant. This pulls the electron cloud closer to the nucleus, strengthening the nuclear attraction to the outer-most electron, and is more difficult to remove (requires more energy).
When _____________ light strikes an object, the _____________ of the object depends on how the object _____________ and/or _______________ the colors of light.
Answer:
When white light strikes an object, the color of the object depends on how the object absorbs and/or reflects the colors of light.
Explanation:
White light is composed of seven distinct colours of light; red, orange, yellow, green, blue, indigo and violet. These colors can be seen when white light is passed through a prism.
The color of an object depends on the colors in the light that falls on it and also on the ability of this object to absorb or reflect this light.
When white light strikes an object, the color of the object depends on how the object absorbs and/or reflect the colors of light.
For example, when white light falls on an object and the object appears green, it means that that object has absorbed all the other colors of white light but reflects green light.
A chemist is studying a substance and determines that it is a compound. What MUST be true of the substance?
When is a frog like a fish?
Answer:
When it swims? Or in the tadpole stage.
H2O2(1) --> H2O2(g)
Figure 1
Is this a physical or chemical reaction?
Answer:
Physical reaction
Explanation:
Since there are no other chemicals in the equation, but the state of the chemical is going from a liquid to a gas, you can conclude that this is a physical reaction.
Help me I don’t understand this
3.5 liters to cubic centimeters
Answer:
3500
Explanation:
what period has only two valence electrons when it is filled?
Answer:
Across each row, or period, of the periodic table, the number of valence electrons in groups 1–2 and 13–18 increases by one from one element to the next. Within each column, or group, of the table, all the elements have the same number of valence electrons.Oct 30, 2019
Explanation:
A student has a sample of aluminum with a mass of 27g and a volume of 10 cm3. What is the density of aluminum?
Visible light has a higher frequency than?
Answer:
The color purple, or equivalently violet
Explanation the end of the visible electromagnetic spectrum, having the highest frequency of any light wave. The reason we see different colors is because of this difference in frequency, where violet light has higher frequency of light waves than blue light.
Forces and Motion:Question 2
A student pushes a box to slide it across the floor. Which statement best explains why the box begins
to move?
Select one:
0 The weight of the box is less than the force of friction.
O
The weight of the box is greater than the force of friction.
The applied force is greater than the force of friction.
O
The applied force is less than the force of friction
Answer:
the applied force is less than the force of friction.
Explanation:
when warm air and cold air mix why will the warm air move upward?
The movement of tectonic plates in two locations is described below:
Location A: Tectonic plates collide and one plate moves over the other while the other plate is pushed deep into the mantle
Location B: Tectonic plates slide past each other
Which statement is most likely correct?
Group of answer choices
Mountains may form in Location B but not in Location A.
There is no chance of earthquakes in the two locations.
Volcanic eruptions may occur in both locations.
Subduction happens in Location A but not in Location B.
Answer:
It is b
Explanation:
Because the mountain comes up not down
Which trend is represented by the graph to the right?
A Atomic Radius
B Reactivity
Clonization Energy
D Electronegativity