Answer:
Heat, Salt
Explanation:
Raising the temperature of ice brings it from a solid state to a liquid. Unless you have a list of substances then it would probably be salt. Salt melts Ice by lowering the freezing point temperature.
If you have a list of substances it would be helpful to list them in your question.
What is the first thing you have to do if there is a fire in the lab.
The first thing you should do when there is a fire in the laboratory is to alert people.
What is OSHA?OSHA is an abbreviation for occupational safety and health administration.
The main purpose of OSHA.The Occupational Safety and Health Administration (OSHA) is an agency of the federal government that is saddled with the following responsibilities:
Assuring and ensuring safe and healthy working conditions for employees or workers.Setting and enforcing standards, rules, and laws.Providing education, trainings and assistance to various organizations.According to the Occupational Safety and Health Administration (OSHA), the first thing a worker or student should do when there is a fire in the laboratory is to alert people.
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why does water have the highest intermolecular forces
Answer:
Water has polar O-H bonds. The negative O atoms attract the positive H atoms in nearby molecules, leading to the unusually strong type of dipole-dipole force called a hydrogen bond.
Explanation:
What is electric current
Answer:a movement of positive or negative electric particles (such as electrons) accompanied by such observable effects as the production of heat, of a magnetic field, or of chemical transformations — compare alternating current, direct current, displacement current.
Explanation:
Identify the section in which each type of information can be found on a Safety Data Sheet.
recommendations in case of accidental contact with the chemical Choose...
chemical name and formula Choose...
possible dangers and health effects Choose...
incompatibility or reactivity with other chemicals Choose...
recommended personal protective equipment (PPE) Choose...
Recommendations in accidental contact >> First Aid Measures; chemical name >> Identification: possible dangers >> Hazards Id.; incompatibility >> handling; PPE >> Exposure Controls.
Chemical hazards and recommendationsChemical hazards are different types of chemical substances capable of causing harm to human health.
The First-Aid Measures are a series of recommendations on how to minimize the effects caused by accidental exposure to a given chemical hazard.
Personal protective equipment (PPE) is a type of specially designed equipment that protects an employer against safety risks during work.
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According to Newton's Second Law of Motion, why would you not want to drive a regular car during a race on a racetrack?
Answer:
According to Newton's first law of motion, it is the natural tendency of all moving objects to continue in motion in the same direction that they are moving ... unless some form of unbalanced force acts upon the object to deviate its motion from its straight-line path. Moving objects will tend to naturally travel in straight lines; an unbalanced force is only required to cause it to turn. Thus, the presence of an unbalanced force is required for objects to move in circles.
Explanation:
Twenty students were surveyed to find out how
many hours of TV they watch during a school
week. The results are shown to the right Answer
the following questions and round your answers to
the nearest half hour
The range of the data is
hours
DONE
Answer:
this is good question I am thankful to you
Answer:
The range of the data is 11 hours
Explanation:
edge 2022, trust
What is added to make solid ice change to liquid water and then to gaseous steam.
Answer: heat
Explanation: if solid ice is heated it becomes in liquid and then to gaseous steam.
2C2H2(g) 5O2(g) → 4CO2(g) 2H2O(g) This is a balanced equation for the combustion of acetylene(C2H2). How many moles of oxygen(O2) are required to react completely with 1. 0 mole of acetylene(C2H2)?.
The moles of oxygen required to completely react with 1-mole acetylene is 2.5 mol.
The moles of reactant and product in a chemical reaction to the whole number ratio is given by the stoichiometric coefficient of the balanced chemical equation.
Computation for the moles of oxygenThe balanced chemical equation for the reaction is :
[tex]\rm 2\;C_2H_2\;+\;5\;O_2\;\to\;4\;CO_2\;+\;2\;H_2O[/tex]
From the balanced chemical equation, the 2 moles of acetylene react with 5 moles of oxygen.
The moles of oxygen react with 1 mole of acetylene are:
[tex]\rm 2\;mol\;C_H_2=5\;mol\;O_2\\\\1\;mol\;C_2H_2=\dfrac{5}{2}\;\times\;1\;mol\;O_2\\\\ 1\;mol\;C_2H_2=2.5\;mol\;O_2[/tex]
The moles of oxygen required to completely react with 1-mole acetylene is 2.5 mol.
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Brian is testing to see how much water plants need. Why is it important that Brian includes a control group? A) To observe whether plants need water or not B)To confirm that plants need 25ml of water per day C)To confirm that plants need 75ml of water per day D) To observe one variable at a time
Answer: B or C
Explanation: The question does not include the variable or steps Brian is using so either one could be correct. It has to be the one that he is controlling though. This is because a control group is used to rule out any alternate explanations. Therefore the answer should be the one that he is trying to test out.
What is the main form of energy represented by each of the following?
Oxygen bonds with carbon
1) chemical energy
2)potential energy
3)kinetic energy
4)thermal energy
Answer:
chemical energy is your correct answer mark me brainly
The oxidation state of Mn2
A combustion reaction occurs between one molecule of methane (CH4) and two molecules of oxygen (O,)
A 1 carbon, 4 hydrogen, and 2 oxygen
B 1 carbon, 4 hydrogen, and 4 oxygen
C 1 carbon, 1 hydrogen, and 1 oxygen
D 1 carbon, 1 hydrogen, and 2 oxygen
Answer:
D
Explanation:
Because I carbon atom and 1 hydrogen atom plus 2
Oxygen atoms are needed
what does the name cambrian period mean?
Answer:
the first geological time period of the Paleozoic Era
Explanation:
______ are organic molecules characterized by large areas that contain many nonpolar carbon-carbon and carbon-hydrogen bonds, making them hydrophobic.
Answer:
Lipids are organic molecules characterized by large areas that contain many nonpolar carbon-carbon and carbon-hydrogen bonds, making them hydrophobic.
What mass of zinc contains the same number of atoms as 500.0 g of gold?
Answer:
166 g of Zinc
Explanation:
First calculate moles of Gold.
Moles = Mass / M.Mass
Moles = 500 g / 196.96 g/mol
Moles = 2.54 mol
Secondly, calculate mass of Zinc using moles of Gold.
Mass = Moles × M.Mass
Mass = 2.54 mol × 65.36 g/mol
Mass = 166 g of Zinc
Is it safe to inhale essential oils from a diffuser?.
what is a matter and how do it work?
Answer:
Matter is any substance that has mass and takes up space. Any physical object consists of matter. It doesn't matter whether it's an atom, element, compound, or mixture. It's all matter. (Not a pun, i promise ツ)
However, unlike some believe, not everything you encounter in the world is matter. Matter can be converted into energy, which has neither mass nor volume. So, light, sound, and heat are not matter. Most objects have both matter and some form of energy, so the distinction can be tricky. For example, a candle flame certainly emits energy (light and heat), but it also contains gasses and soot, so it is still matter. The building blocks of matter are called "atoms" and "molecules." They, too, are matter. The matter we can detect normally is called "baryonic" matter. However, there is another type of matter out there, which can't be directly detected. But its influence can. It's called dark matter.
Attached below is a picture of examples of matter.
Key words and phrases:
matter, heat, light, dark matter, baryonic matter, sound, energy, mass, volume, space, physical
Hope this helps! Brainliest would be much appreciated! Have a great day! :)
how many molecules of water are in 1.8 moles of water
The number of molecules in given amount of water is 10.8396 x 10 by the 23 power.
What started universe (Science)
Answer:
Big bang theory
Explanation:
Our universe began with an explosion of space itself - the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.
Answer:
The Big Bang
Explanation:
The Big Bang was the moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded. Most astronomers use the Big Bang theory to explain how the universe began.
Consider the reaction 2SO2(g) O2(g) Right arrow. 2SO3(g). Substance Delta. Hf (kJ/mol) S (J/(molmc021-3. JpgK)) SO3(g) –396 130. 58 SO2(g) –297 191. 50 O2(g) 0 205. 00 What is the Delta. Grxn of this reaction, and would it be spontaneous or nonspontaneous at 300. 0 K? Use Delta. G = Delta. H – TDelta. S. –296 kJ/mol, spontaneous –296 kJ/mol, nonspontaneous –100 kJ/mol, spontaneous –100 kJ/mol, nonspontaneous.
The reaction has [tex]\Delta G[/tex] value of -296 kJ/mol, and the reaction is spontaneous. Hence, option A is correct.
The value of [tex]\Delta G[/tex] for the reaction is the change in the free energy. The [tex]\Delta G[/tex] for the reaction is calculated as:
[tex]\Delta G=\Delta H-T\Delta S[/tex]
Computation for [tex]\Delta G[/tex] of the reactionThe given reaction is:
[tex]\rm 2\;SO_2\;+\;O_2\;\to\;2\;SO_3[/tex]
The change in enthalpy and entropy is given by the difference in product and reactant.
Thus, the change in free energy is given as:
[tex]\Delta G=(\Delta H_{product}-\Delta H_{reactant})-T(\Delta S_{product}-\Delta S_{reactant})\\\\\Delta G=(2(\Delta H_{SO_3})-(2(\Delta H_{SO_2})\;+\;\Delta S_{O_2}))-T((2(\Delta S_{SO_3})-(2(\Delta S_{SO_2}))[/tex]
Substituting the values in the above equation at a temperature of 300 K.
[tex]\Delta G=(2(-396)-(2(-297)\;+\;(0)))-300\;(2(130.58)-(2(191.50)+(205)))\\\Delta G=(-792-(-1386))-300\;(261.16+588)\\\Delta G=-296\; \rm kJ/mol[/tex]
The negative value of [tex]\Delta G[/tex] represents the reaction to be spontaneous.
Thus, the reaction has [tex]\Delta G[/tex] value of -296 kJ/mol, and the reaction is spontaneous. Hence, option A is correct.
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help plz 50 points <3
Answer:
I believe the answer is the last one answer D: Neutral elements
Explanation:
Ionic bonds are formed through the exchange of valence electrons between atoms, typically a metal and a nonmetal. ... Ionic compounds are typically neutral. Ionic compounds generally form between elements that are metals and elements that are nonmetals.
Hope this helps please mark brainliest :)
Answer:
i got a new padlit
Explanation:
This response to stimuli is very important in protecting the eyes because although they need light to see, too much light can cause serious damage. Which of the following best describes the nervous system's role in changing pupil size in response to light?
A.
The nervous system works without the aid of other systems in order to provide a sufficiently rapid response.
B.
The nervous system receives and interprets sensory information from the eyes and signals the muscles of the eyes to perform the response.
C.
The nervous system is a network of electrical impulses that becomes activated after the muscles within the eyes perform the response.
Answer:
The nervous system receives and interprets sensory information from the eyes and signals the muscles of the eyes to perform the response.
Explanation:
"The involuntary response of pupils dilating and contracting in response to light involves nerves sending impulses to and from the eyes' light receptors, which in turn tell the muscles in the iris to contract or expand." - Study Island
The chemical characteristics or reactivity of an element depend mostly on the.
The chemical characteristics or reactivity of a chemical element is highly (mostly) dependent on the: number of valence electrons in its outermost shell.
What is chemical characteristics?A chemical characteristic can be defined as the properties of a chemical element or compound that is mainly observable and measurable during a chemical reaction such as reactivity.
What is a valence electron?A valence electron can be defined as the number of electrons that are present in the outermost shell of an atom of a chemical element.
In Chemistry, the number of valence electrons (valency) is a property that is typically used to determine the chemical characteristics or reactivity of all chemical elements.
In conclusion, the chemical characteristics or reactivity of a chemical element is highly (mostly) dependent on the number of valence electrons in its outermost shell.
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Why should you always condition a buret before running a titration?.
Answer:
Conditioning two or three times will insure that the concentration of titrant is not changed by a stray drop of water.
Explanation:
"Check the tip of the buret for an air bubble. To remove an air bubble, whack the side of the buret tip while solution is flowing".
Which statement describes heterogeneous mixtures?
They are made up of two or more pure substances that are not chemically bonded together and appear non-uniform.
The substances they are composed of can only be separated chemically.
The substances they are composed of have fixed ratios between their components.
They are made up of two or more pure substances that are chemically bonded together and appear uniform.
Answer:
A.
Explanation:
got it correct on edge.
How does anaerobic respiration occur in yeast ?
how many atoms of boron are present in 8.0*10^-6 moles of boron
Explanation:
Molar mass of
B
=
10.81
g
⋅
m
o
l
−
1
. If there are 36 odd grams of
B
, there are approx.
7
2
×
N
A
boron atoms, where
N
A
is Avogadro's number.
Explanation:
35.76
⋅
g
10.81
⋅
g
⋅
m
o
l
−
1
×
6.022
×
10
23
m
o
l
−
1
=
?
?
Answer link
MAT
Nov 15, 2015
1.991
×
10
24
Explanation:
Molar mass of B = 10.81g/mol
So, 1 mole of B = 10.81g
and 1 mole =
N
A
=
6.023
×
10
23
By combining,
10.81g of B =
6.023
×
10
23
atoms of B
thus,
35.76g of B =
6.023
×
10
23
10.81
×
35.76
35.76g of B =
1.991
×
10
24
48.176 × 10¹⁷ atoms of boron are present in 8.0 × 10⁻⁶ moles of boron.
Avogadro's NumberAvogadro's number is the number of particles in one mole of substance. 6.022 × 10²³ is known as Avogadro's constant / Avogadro's number.
Avogadro's number = 6.022 × 10²³
How to find the number of atoms ?
Number of atoms = Number of moles × Avogadro's Number
= 8.0 × 10⁻⁶ × 6.022 × 10²³
= 48.176 × 10¹⁷ atoms of boron
Thus, from the above conclusion we can say that 48.176 × 10¹⁷ atoms of boron are present in 8.0 × 10⁻⁶ moles of boron.
Learn more about the Avogadro's Number here: brainly.com/question/859564
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How many grams of magnesium would you have in 2.5 moles?
Answer:
there is 60.7625 grams of magnesium
Answer:
Explanation:
1 mol of magnesium = 25 grams (correct this with the periodic table you were given.
2.5 mols = x grams
1/2.5 = 24/x Cross Multiply.
x = 2.5 * 24
x = 60 grams Remember to correct the 24 with the mass given with your periodic table.
What is gravitational energy? Please help.
Answer:
When falling. Such as dropping an item, or tripping over a banana peel!
Explanation:
Gravitational potential energy is the energy stored in an object as the result of its vertical position or height. The energy is stored as the result of the gravitational attraction of the Earth for the object.
Explanation:
hope this helps you
What reason best explains why hydrogen is placed in group 1
Answer:
Hydrogen is placed in group one (non-metals) because hydrogen is not a metal. It is a highly reactive gas. It has the lowest atomic mass, and belongs with the gases in group one.
Explanation:
