Answer:
D) Chromatography
Explanation:
Answer: It is D. chromatography.
Step-by-step explanation:
when water or dye passes through a medium and changes color then that means it must be chromatography.
what are the different ways of how animals reproduce?
Answer:
Sexual and Asexual Reproduction
Explanation:
LOL
A) Mention any two properties of an ideal fuel. (b) What is meant by calorific value? (c) 2kg of a fuel produces 48,000 KJ of heat energy and complete combustion. Calculate the calorific value of the fuel.
Answer and explanation:
A) An ideal fuel must:
- easy to transport and storage.
- have a high calorific value.
B) The calorific value for a fuel is the amount of heat - measured in Joules- which is produced during the complete combustion of the fuel. It is expressed in Joules per Kg of fuel (J/kg).
C) From the data:
mass of fuel = 2 kg
heat produced = 48,000 KJ
We calculate the calorific value by dividing the heat produced by the mass of fuel, as follows:
calorific value = heat produced/mass of fuel = (48,000 KJ)/(2 kg)= 24,000 kJ/kg
Since 1 KJ= 1000 J, we can express the calorific value in J/kg as follows:
24,000 kJ/kg x 1000 J/1 kJ = 2.4 x 10⁷ J/kg
What is a food chain? what does it show?
Answer:
A food chain shows how energy is transferred from one living organism to another via food. ... When these animals eat these plant products, food energy and organic compounds are transferred from the plants to the animals.
200 mL of nitrogen gas at 24K is heated to 47K.
Answer:
See explanation
Explanation:
The question is incomplete. However, base on the given information, one likely question could be that, we calculate the the volume of the nitrogen gas after heating it.
So, we have that:
Initial Volume, V1 = 200mL
Initial Temperature, T1 = 24k
Final Temperature, T2 = 47k
To solve the final volume of the gas, we apply the following ideal gas law equation
V1 * T1 = V2 * T2
Substitute values for V1, T1 and T2
200mL * 24K = V2 * 47K
200mL * 24 = V2 * 47
4800mL = 47V2
Solve for V2
V2 = 4800/47
V2 = 102.13 mL ------- Approximated
Hence, the volume of nitrogen gas after heating is 102.13mL
In an experiment, the one variable that is changed on purpose by the
scientist is called the
1. controlled variable
2. experimental variable
3. independent variable
4. dependent variable
Answer:
3
Explanation:
Independent variable
POSSIBLE POINT
Collisions between reactant molecules lead to a reaction when the molecules have the correct orientation and enough kinetic energy
True
False
Explain the
purpose
of the heat exchanger in the nuclear power plant.
Answer:
yeah someone explain
Explanation:
tttttttttt%ttttttt
Answer:
A heat exchanger is device which is designed to transfer heat from one matter to another. In nuclear power plants, these heat exchangers are used to pass heat from primary system to the secondary system. In the process they produce steam from water, they are also called steam generators or pressurized water reactors.
Neutrons are located
in the nucleus with protons
in the nucleus with electrons
in orbit around the nucleus
both in orbit and in the nucleus
Answer:
Neutrons are located in the nucleus with protons.
Explanation:
Neutrons are located in the nexus of a snippet along with protons. The nexus is the mediate portion of a snippet that contains the utmost of its body.
Protons convey a good count, while neutrons are neutral and don't convey an electric count. Electrons, on the different side, are located in route around the nexus, enwrapping snap situations or electron coverings.
Neutrons are subatomic patches that are one of the immediate ingredients of infinitesimal capitals. They're generally imported by the logo "n or no". Neutrons don't hold any net electric count companies with them.
They befit, still, own a body that's scarcely lesser in significance than that of a proton. Neutrons and protons are inclusively appertained to as nucleons since they bear analogous proprieties inside the capitals of titles.
Learn more about Neutrons here:
brainly.com/question/31977312
What is the name for the compound S3N2
Answer:
Sulfur Nitride
How does an atom of one element differ from the atom of another element?
-Are there other ways to change the identity of an atoms? Explain, please.
Explanation:
The atoms of one element differs from the atoms of other elements in terms of the number of protons they contain. This is often taken as the atomic number of such an atom.
The number of proton is the best indicator of the atom one is dealing with. Based on this number, elements are categorized into distinct columns and rows on the periodic table. The atomic number is the number of protons or positively charge particles in the atom.II.
It is possible to change the identity of an atom. This is only possible by altering the atomic number of the atom.
Only nuclear reactions have this capability.
When an atom undergoes nuclear reaction that involves change in number of protons, transmutation occurs and a new atom forms.
Which is one characteristic of deep ocean currents someone pls help
Answer:
visbility if that is an answer
Explanation:
Answer:
hope it helps...
Explanation:
Thermohaline circulation
Deep ocean currents are driven by density and temperature gradients. This thermohaline circulation is also known as the ocean's conveyor belt.
If my answers helped please comment...
How many grams of C are required to react with 97.1 g of Fe2O3?
Answer:
21.9 g C
Explanation:
Fe₂O₃ + 3 C ⇒ 2 Fe + 3 CO
This is your chemical equation.
To find the grams of C required, first convert grams of Fe₂O₃ to moles using the molar mass (159.69 g/mol).
(97.1 g)/(159.69 g/mol) = 0.608 mol Fe₂O₃
Then, use the mole ratio between Fe₂O₃ and C to convert moles of Fe₂O₃ to moles of C. You can find the mole ratio by looking at the chemical equation.
(0.608 mol Fe₂O₃) × (3 mol Fe₂O₃/1 mol Fe₂O₃) = 1.824 mol C
You can then convert moles of C to grams using the molar mass (12.01 g/mol).
(1.824 mol) × (12.01 g/mol) = 21.9 g
HELP ASAP! STUDY ISLAND
Solar energy is energy from the Sun that is converted into thermal or _____ energy. A. chemical B. mechanical C. nuclear D. electrical
Explanation:
done here u gooooooooo
Which set of coefficients would balance the following equation
Answer:
3Mg + 2AlCl3 --> 2Al + MgCl2
how are sex cells different from body cells
Answer:
Sex cells are different in body cells because the sex cells are eggs while body cells are formed.
Which is the best example of the law of conservation of energy?
A basketball stops bouncing because its energy disappears.
A rolling skateboard slows down because some of its kinetic energy changes to heat.
A falling book hits the ground and all of its energy is destroyed.
A toy car gains speed as it moves down a ramp because the ramp creates energy.
Answer:
The answer is B. A rolling skateboard slows down because some of its kinetic energy changes to heat.
Explanation:
The law of conservation says energy cant be created or destroyed .Which basically eliminates all of them except b. It can only be transferred
Answer:
b
Explanation:
A compound is made up of 30% nitrogen and 70% sulfur. the molar mass of a compound is 92 g/mol. What is the molecular formula of the compound?
Answer:
N2S2
I just took the quiz and it was right
Which of the following elements are already balanced in this equation? FeS₂ + Cl₂ → FeCl₃ + S₂ Cl₂
Fe and S are already balanced in this equation
Further explanationBalanced indicates that the number of elements in question has the same number of atoms both on the left side (the number on the reactants side) and on the right side (the number on the product side)
Even though one of the elements is said to be balanced, the chemical equation as a whole cannot be said to be balanced, because the chemical equation has several components of the constituent elements.
To balance chemical equations, a coefficient in front of the compound is usually added either in the reactants or products
Reaction
FeS₂ + Cl₂ → FeCl₃ + S₂Cl₂
From this equation, it can be shown that: the Fe and S elements are balanced because the numbers are equal both on the left and right, while the Cl elements are not yet balanced
Fe, left=1, right=1 ⇒ balanced
S, left=2, right=1 ⇒ balanced
Cl, left=2, right=5⇒ not balanced
For balanced equations:
2FeS₂ + 5Cl₂ → 2FeCl₃ + 2S₂Cl₂
A plane travel at 395,000 meters at a rate of 4500 m/s? How long did it take the plane to reach
its destination?
HELP MEEE !!
Answer:
87.78 sExplanation:
The time taken by the plane to reach its destination can be found by using the formula
[tex]t = \frac{d}{v} \\ [/tex]
d is the distance
v is the velocity
From the question we have
[tex]t = \frac{395000}{4500} = \frac{3950}{45} = \frac{790}{9} \\ = 87.77777...[/tex]
We have the final answer as
87.78 sHope this helps you
Describe how the nervous system helps the boy detect the aroma coming from the pot on the stove.
Answer:
When a boy smells the aroma coming from the pot on the stove is actually detecting the chemicals coming from the air which comes from hot food that dissolves in the mucus present in the nasal cavity that carries tiny hairs made up of the nerve fibers that absorb these chemicals and excite or stimulate the olfactory receptors.
Various types of a distinct aroma or smell lead to a specific combination of the olfactory cells to make a specific smell. These combination patterns transported to the olfactory bulb along axons; a long extended neuron.
The sensory patterns or information encoding the smell of food present in the pot reaches the primary olfactory cortex in the brain, which is present on the anterior surface of the temporal lobe, and decodes accordingly.
Answer:You breath in what you smell and if it smells good or not you usely get up an see what is in the kitchen
Explanation:
HELP ASAP PLS a 35.0 g block of copper is dropped into 450 grams of water
at 21.5 C. The temperature of the water changes to 22.3 C. Does the water's temperature rise or fall?
Answer:
the temperature of the water rises
Explanation:
22.5 < 22.3
Tides are caused when earthquakes occur under the ocean TRUE OR FALSE
Answer:
False
Explanation:
tides are caused due to the gravitation of moon, they occurred 2 times a day, or takes 6 hours 13 minutes for a ride
5 Daniel has dropped two glass jars containing sugar
and salt as he tried to get them down from the
kitchen cupboard. He now has a mixture of glass,
sugar and salt. Describe in detail how he could
separate the three substances. Sugar and salt are
both soluble in water, but only sugar is soluble in
ethanol (remember that ethanol is flammable and
should not be heated directly).
Answer:
He could separate the mixture through filtration and fractional crystallization. Ethanol can also be added in order to remove salt.
Write both the complete electron- configuration notation and the noble-gas notation for iodine, I. How many inner-shell electrons does an iodine atom contain?
Answer:
Iodine has an atomic number of 53
Electronic configuration - 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^5
Noble gas configuration - [kr]4d^10 5s^2 5p^5
Iodine have 7 valence shell electron and 46 inner shell electron in the ground state.
The atomic number of Iodine is 53.
Additionally, the Electronic configuration of Iodine is as follows;
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁵The Noble gas notation for Iodine is;
[Kr]4d^10 5s^2 5p^5Ultimately, Iodine is a member of the halogen group of the periodic table and hence, has 7 valence shell electron and 46 inner shell electron in the ground state.
Read more;
https://brainly.com/question/15297542
Answer the following questions:
* How is the chemical formula determined for an ionic compound?
* How are the ionic compounds named using IUPAC nomenclature rules?
Answer:
1. The chemical formula is determined by first finding the positive charge, which is cation, and then finding the negative charge, which is the anion. The cation is writing first, than the anion.
2.An ionic compound is named first by its cation and then by its anion.
Explanation:
Just did it.
What must happen for an igneous rock to form
Answer:
Igneous Rocks: form by crystallizing melted material (magma).
Explanation:
They can form either on the surface (extrusive igneous rocks), or deep in the crust (intrusive or plutonic igneous rocks).
the table below gives the numbers of protons, electrons, and neutrons in four atoms. based on the table, which atom had a charge of -1
If we know the half life how could we determine what percentage of radioactive isotopes will be left after 4 half-lives?
Answer:
"After 1 half-life there will be 50% of the original isotope, and 50% of the decay product.
After 2 half-lives there will be 25% of the original isotope, and 75% of the decay product.
After 3 half-lives there will be 12.5% of the original isotope, and 87.5% of the decay product.
After 4 half-lives there will be 6.25% of the original isotope, and 93.75% of the decay product." -Stephen Frantz, Former Director of the Reed College Nuclear Reactor
Explanation:
1. Calculate the mass of iron needed to make 16.25g of iron chloride (3
marks)
2Fe + 3Cl2 → 2FeCl3
Answer:
5.595 g Fe
General Formulas and Concepts:
Chemistry - Stoichiometry
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
16.25 g FeCl₃ (Iron III Chloride)
RxN: 2Fe + 3Cl₂ → 2FeCl₃
Step 2: Identify Conversions
Molar Mass of Fe - 55.85 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of FeCl₃ - 55.85 + 3(35.45) = 162.2 g/mol
Step 3: Stoichiometry
[tex]16.25 \ g \ FeCl_3(\frac{1 \ mol \ FeCl_3}{162.2 \ g \ FeCl_3} )(\frac{2 \ mol \ Fe}{2 \ mol FeCl_3} )(\frac{55.85 \ g \ Fe}{1 \ mol \ Fe} )[/tex] = 5.59533 g Fe
Step 4: Check
We are given 4 sig figs. Follow sig fig rules and round.
5.59533 g Fe ≈ 5.595 g Fe
Help please I don’t know
Answer:
I don't EXACTLY know but hopefully the description below helps you find the answer!
Ionic bonding is a type of chemical bond in which valence electrons are lost from one atom and gained by another. This exchange results in a more stable, noble gas electronic configuration for both atoms involved. An ionic bond is based on attractive electrostatic forces between two ions of opposite charge.
Explanation: