Answer:
Boiling: The process of conversion from liquid to gas on heating is called boiling.
Example: Water on heating turns into water vapour.
Melting: The process of conversion from solid to liquid at room temperature is called melting.
Example: Ice cream melting at room temperature.
Sublimation: The Conversion of solid to gas directly is called sublimation.
Example: Camphor, Dry ice
Explanation:
Hope it helps you:))))
what is your question in climate change?
Answer:
Why has my town experienced record-breaking cold and snowfall if the climate is warming? Is there scientific consensus that people are causing today's climate change? Do natural variations in climate contribute to today's climate change?
Explanation:
Yan po ang answer tama po yan
Which of the following measurements has 4 significant figures?
800. g
800.0 g
832,000 g
8000 g
Answer:
The answer is option D.
Explanation:
Hope it helps!
Answer:
8000g
Explanation:
option D is the correct answer.
what's Electro magnetic radiation?
Answer:
a kind of radiation including visible light, radio waves, gamma rays, and X-rays, in which electric and magnetic fields vary simultaneously.
HELP QUICKLY PLEASEEE
Answer:
Ionic bonds are when electrons are gained/lost. Hence the valence charges.
When you insert a new slide in a presentation, where is it placed in relation to the existing slides?
When we insert a new slide in a presentation, it is placed next or below in relation to the existing slides.
Where should the new slide placed in relation to the existing slides?When we want to open a new slide we will Click on the New Slide button located on the Home tab in the Slides group. The new slide should appear below the selected slide.
So we can conclude that When we insert a new slide in a presentation, it is placed next or below in relation to the existing slides.
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Can someone help me?
Answer: 0.160 M
Explanation:
How many grams of carbon dioxide would be produced from the following reaction, if 175 kJ of energy is given off? 2 CO + O2 2 CO2 ΔH = -566 kJ
42.6897 grams of carbon dioxide would be produced from the following reaction, if 175 kJ of energy is given off.
How do we calculate moles?The mole (symbol mol) is the SI base unit of material quantity. The amount of substance in an object or sample is a measure of how many elementary entities of a certain substance are present.
Given chemical reaction is:
[tex]2CO + O_2[/tex] → [tex]2 CO_2[/tex]
From the stoichiometry of the reaction, it is clear that 2 moles of carbon dioxide are produced.
Actual moles will be calculated by using the enthalpy and energy value as:
Actual moles of [tex]CO_2[/tex] = 275kJ × ([tex]\frac{2 mol}{566 kJ}[/tex]) = 0.97 moles.
Grams of carbon dioxide = moles X molar mass of carbon dioxide.
Grams of carbon dioxide = 0.97 X 44.01 g/mol
Grams of carbon dioxide = 42.6897 g
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How do intermolecular forces among entities in an ideal gas compare to those among entities in a real gas
Answer:
An ideal gas has identical particles of zero volume, with no intermolecular forces between them. The atoms or molecules in an ideal gas move at the same speed. Almost all gases obey the gas laws within a limited range of pressures and temperatures.
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12. Predict How much of a sample of radioisotope remains after one half-life? After two half-lives?
ANSWER:
3 4 of the original mass has decayed.
EXPLANATION:
After 1 half life, clearly HALF of the original isotope remains. And after TWO half-lives, a HALF + HALF of a HALF, i.e. 3 4 of the original mass has decayed.
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What is the name of this alkane? two central carbons are bonded to c h 3 at each end, h below, and c h3 above the left carbon and h above the right carbon. 1-methylbutane 2-methylbutane 1,2-triethylethane 1-dimethylpropane
The name of this alkane is with central carbons are bonded to c h 3 is 2-methylbutane.
What is alkane?
Alkanes belong to the family of saturated hydrocarbons with carbon carbon single bond.
For the given alkane;
CH₃ H
CH₃ - C - C - CH₃
H H
Thus, the name of this alkane is with central carbons are bonded to c h 3 is 2-methylbutane.
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Answer:
2-methylbutane
Explanation:
Which are the products in the equation ch3sh 4o2 → co2 so2 2h2o? check all that apply. ch3sh o2 co2 so2 h2o
The products in the equation would be [tex]CO_2[/tex], [tex]SO_2[/tex], and [tex]H_2O[/tex].
Chemical equationsFrom the equation of the reaction:
[tex]CH_3SH + 4O_2 --- > CO_2 + SO_2 +2H_2O[/tex]
The products are [tex]CO_2[/tex], [tex]SO_2[/tex], and [tex]H_2O[/tex].
This is because, for every chemical equation, the reactants are always at the back of arrows while products are at the front of arrows. In other words, reactants are usually on the left-hand side while products are on the right-hand side.
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What are some of the benefits of being able to predict natural disasters and knowing when and where they might occur?
Give an example of these types of organisms predator scavenger and decomposer
Predator - Lions (any animal that preys upon other animals)
Scavenger - Vultures (any animal that consumes decaying flesh)
Decomposer - Worms/ Fungi (any organism that breaks down dead organisms into smaller particles and creates new compounds such as nutrients for plants)
What is the compound Cu₂SO4 called?
Answer:
Cu2SO4 is referred to as copper sulphate
How do you think the light would travel if the laser pointer was 1000 meters away?
20 pnts!!!!!!!!!!!!!!!!!!!!!
It totally depends on the laser power (mW). The divergence of the light is depending on it.
What is a laser?A device that uses stimulated emission of photons from excited atoms or molecules to produce a strong beam of coherent monochromatic light is a laser.
When electrons in optical materials like glass, crystal, or gas absorb energy from an electrical current or light, a laser is formed.
When a 5mW 650 nm laser glows on a white surface in complete darkness, we can see it from 500 to 1 km distant.
Because of the divergence, the projected dot 1 km distant will be a huge dot with a diameter of 20–30 m30 m and will be extremely dim.
Hence,It totally depends on the laser power (mW). The divergence of the light is depending on it.
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PLEASE HELP ASAPP!!!!! WILL MARK BRAINLIEST
if 500 g of iron absorbs 22000 cal of heat, what will be the change in temperature? (specific heat of iron = 0.11 cal/gC)
Answer:
400°C
Explanation:
22,000 cal / (0.11 cal/g°C x 500 g) = 400°C
Answer:
400 C degree change
Explanation:
22 000 cal = 500 g * (C) * .11 cal / g-C
C = 22 000 / (500*.11) = 400 C degree change
What is the approximate tangential speed of an object orbiting earth with a radius of 1.8 × 108 m and a period of 2.2 × 104 s? 7.7 × 10–4 m/s 5.1 × 104 m/s 7.7 × 104 m/s 5.1 × 105 m/s
This question involves the concepts of time period and tangential speed.
The tangential speed of the object is "5.1 x 10⁴ m/s".
What is the time period?The following formula gives the time period of the object:
[tex]T=\frac{2\pi}{\omega}\\\\[/tex]
[tex]\omega = \frac{2\pi}{T}[/tex]
where,
[tex]\omega[/tex] = angular speed = ?T = time period = 2.2 x 10⁴ sTherefore,
[tex]\omega=\frac{2\pi}{2.2\ x\ 10^4\ s}\\\\\omega=2.86\ x\ 10^{-4}\ rad/s[/tex]
Now, the tangential speed can be given by the following formula:
[tex]v=r\omega[/tex]
where,
r = radius = 1.8 x 10⁸ mv = tangential speed = ?Therefore,
[tex]v=(1.8\ x\ 10^8\ m)(2.86\ x\ 10^{-4}\ rad/s)[/tex]
v = 5.1 x 10⁴ m/s
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Answer: 5.1 x 10⁴ m/s
Explanation:
edge 2023
159
Which type of reaction is:
4 (NH4)3PO4 + 3 Pb(NO3)4 - 12 NH4NO3 + Pb3(PO4)4
Synthesis
Decomposition
Double Displacement
Single Displacement
Which of the following statements supports the idea that light behaves as a wave?
A.
Photons change direction when they interact with electrons.
B.
Light bends as it passes from one medium to another.
C.
The kinetic energy of an electron increases when light of high frequency is incident on it.
D.
There are gaps in the absorption spectrum as light is absorbed at certain frequencies.
Answer:
It's B
Explanation:
as I answered it in study island.
what three things did rutherford discover about the atom
2AlCl3 → 2Al + 3Cl2
In the reaction above, if we were to get 7.50g of AI, what would be the yield of the experiment.
Answer:
Explanation:
2AlCl3 → 2Al + 3Cl2
In the reaction above, if we were to get 7.50g of AI, what would be the yield of the experiment.
Which statements are true of the reactions in the Sun?
Check all that apply.
A.
They occur only between helium atoms.
B.
Hydrogen atoms are produced.
C.
They are fusion reactions.
D.
The reactions occur because of very high temperatures.
The correct statements which are true for the reactions in the Sun are that are fusion reactions and reactions occur because of very high temperatures.
What is nuclear fusion?Nuclear fusion reactions are those reactions in which two species reacts with each other for the formation of new specie.
In the core of the sun, nuclear fusion of hydrogen atoms occur for the formation of helium molecules in the presence of high temperature.
Hence, the correct statements are they are fusion reactions and reactions occur because of very high temperatures.
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Answer asapppp plssss!!!
consider the sample sds for hydrochloric acid and answer the questions,
what type of environment should the hydrochloric acid be stored in? check all that apply
1.)in a beaker
2.)in a cool, well-ventilated area
3.)in a flask
4.)in a tightly closed container
The safety data sheet is used while working in a laboratory and handling chemicals. According to SDS, hydrochloric acid should be stored in a cool, well-ventilated area. Thus, option 2 is correct.
What is hydrochloric acid?Hydrochloric acid has been defined as a strong acid that is liquid formed by the two elements, hydrogen gas, and chloride. Because of their corrosive nature and high reactivity they are recommended to be stored in dark-colored glass bottles.
They should be stored in a cool and well-ventilated area as they can easily react with other metals, alkalis, oxidizing agents, etc. The reaction results in heat formation and gaseous vapors that are harmful when coming in contact.
Therefore, option 2. hydrochloric acid should be stored in dark and cool places.
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What’s the importance of having a vascular system
Answer:
The vascular system, also called the circulatory system, is made up of the vessels that carry blood and lymph through the body. The arteries and veins carry blood throughout the body, delivering oxygen and nutrients to the body tissues and taking away tissue waste matter.
Explanation:
from the following chemical reaction , calculate the moles of mg if 3.5 mol of hcl in reactant mg + 2hcl --> mgcl2 + h2
A piece of metal weighing 0.035 kg was submerged in a graduated cylinder containing water. The water level rose from 2.0 mL to 9.0 mL. What is the density in g/mL of the metal
Taking into account the definition of density, the density of the metal is 5 [tex]\frac{g}{mL}[/tex].
What is densityDensity is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.
In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.
Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
This caseIn this case, the increase in the volume of water in the cylinder is due to the volume of the metal. This means that the volume of the metal can be calculated by taking into account the volume occupied by the water + the metal and the volume occupied by the water alone in the cylinder.
Then, you know that:
Mass= 0.035 kg= 35 g (being 1 kg=1000 g)Volume= Volumen water + the metal - Volume water= 9 mL - 2 mL= 7 mLReplacing in the definition of density:
[tex]density=\frac{35 g}{7 mL}[/tex]
Solving:
density= 5 [tex]\frac{g}{mL}[/tex]
In summary, the density of the metal is 5 [tex]\frac{g}{mL}[/tex].
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3. Why do some reactions occur Nturally, and others do not?
Answer:
depends
Explanation:
because some are caused by different variables
When electrical ___ betweens protons is greater than strong forces, the nucleus will be unstable.
Answer:
repulsion
Explanation:
31. Can two (or more) types of matter occupy the same space at the same time?
32. What is hardest state of matter?
33. What is the softest state of matter?
Consider the balanced equation. 2hcl mg right arrow. mgcl2 h2 if 40.0 g of hcl react with an excess of magnesium metal, what is the theoretical yield of hydrogen? 1.11 g 2.22 g 52.2 g 104 g
Answer:
1.11 g
Explanation:
From the answer you're given that HCl is the limiting reactant.
Mg + 2HCl -> MgCl2 + H2
40.0 g
First of all you want to know the moles of HCl you actually have:
40.0 g HCl x [tex]\frac{1 moles of HCl}{36.45 g/mol}[/tex] = 1.09739 moles of HCl.
Where 36.45 is the molar mass of H (1.008) + Cl (35.45).
Since the limiting reactant is HCl you'll have to discover how much H2 is produced from the limited quantity of reactant you have:
1.09739 moles of HCl x [tex]\frac{1 moles of H2}{2 moles of HCl}[/tex] = 0.54869 moles of H2 is produced
Now you have to simply convert the moles of H2 in grams:
0.54869 moles of H2 x 2.016 g/mol H2 = 1.106 g
Where 2.016 is the molar mass of H2.
Theoretical yield of hydrogen atom is produced in 2Hcl mg , mgcl₂ and h₂ if 40.0 g of Hcl react with an excess of magnesium is 1.096 moles.
What is molarity ?Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution.
Theoretical yield of hydrogen atom is calculated by using mass amd molar mass of an atom.
2Hcl + mg---> MgCl₂ + H₂
The theoretical yield of hydrogen is calculated as follows
mass/molar mass
40 ÷ 36.5 = 1.096 moles
by use of mole ratio of Hcl to H2 which is 2:1
moles of H2 = 1.096 ÷ 2 = 0.548moles
mass is therefore = moles x molar mass
that is 0.548moles x 2 = 1.096 grams
Hence, the theoretical yield of hydrogen atom is 1.096 grams.
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