Answer:
: B, if it is produced in an earlier step. Which term refers to a substance that is formed in one step of a reaction mechanism and consumed in a subsequent step of the reaction mechanism? D: reaction intermediate
Explanation:
pa brainlyes po kailangan lang talaga
Answer:
its D
Explanation:
trust
38. Assuming a sample mixture made from sand and sugar had a mass of 53.5 g, and
it was separated using decantation and boiling to remove the water used in the
separation procedure, what is the mass percent of sugar in the sample assuming 35.2
g of sugar was recovered, and 16.0 g of sand was recovered?
A.66%sugar
B.4%sugar
C.30%sugar
39. Using the information from question 38 what is the total percent recovery for the separation? Is the percent recovery greater than less than 100% why might this be the case?
The Mass percent of sugar in the sample was 66% while the Total percent recovery is 95.7%
Equation
An equation is an expression used to show the relationship between two or more variables and numbers.
Given the sample had a mass of 53.5g, hence:
Mass percent of sugar in the sample = (35.2/53.5) * 100% = 66%
Total percent recovery = [(35.2 + 16)/ 53.5] * 100% = 95.7%
The Mass percent of sugar in the sample was 66% while the Total percent recovery is 95.7%
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Huge loops of plasma erupting from the sun are called.
Answer:
magnetic Flux ropes
Explanation:
Magnetic flux ropes (also known as coronal loops and solar prominences) sit on the surface of the sun, with matter and energy flowing through them, for hours or days.
A force of 50 N displaces an object by a distance of 80 cm. Calculate the work
done.
Answer:
40 J
Explanation:
W= Fd = 50*0.8 = 40 J
80 cm = 0.8 m
what effect does dilute ethanoic acid have on red litmus paper
Answer:
As ethanoic acid is basically a acid
it will turn blue litmus red and on a red litmus paper
there will be no effect
2 Explain why the reaction between aluminum and iron oxide is useful in the railway industry.
Answer:
Sometimes, it is necessary to produce a small amount of iron more quickly, for example if railway workers need to produce molten metal to fix a broken rail.
Explanation:
The thermite reaction uses aluminium powder and iron (III) oxide. When ignited, the mixture reacts vigorously because of the large difference in reactivity between aluminium and iron.
The aluminum can create more durable bonds with oxygen than it can with hydrogen. Since a lot of heat is produced throughout the entire reaction, molten iron that may be used to link railroad tracks is produced as a result of the reaction.
What is aluminum ?Chemical element aluminum has the atomic number 13 and the symbol Al. Aluminum has a density that is around one third that of steel, which is lower than that of most common metals. It has a strong affinity for oxygen, and when exposed to air, creates a protective oxide coating on the surface.
Aluminum (Al) and iron(III) oxide (Fe2O3) react to generate aluminum oxide (Al2O3) and molten iron (Fe). Aluminum displaces iron in iron(III)oxide to generate aluminum oxide in what is known as a displacement reaction.
Iron oxide and aluminum are used to repair machine parts that have cracks or serve as railing on railroad tracks. Thermite reaction is the name given to this process.
Thus, The aluminum can create more durable bonds with oxygen than it can with hydrogen.
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Delaney is putting together a motor for her
science project. She needs a material that
conducts electricity for the circuits and a
material that does not conduct electricity for insulators
Answer:
40. B
41. B
Explanation:
Copper is a good insulator and conducts electricity.
Calculate the ΔGr0 of the following reaction and state whether it is spontaneous at standard temperature or not. (You will need table B-12 in your CRG)
2AgNO3(aq)+MgCl2(aq) → 2AgCl(s) + Mg(NO3)2(aq)
Options are
1 - (151.38 kJ, yes
2 - (-150.14 kJ, yes
3 - (101.38 kJ, no
4 - (-131.14 kJ, yes
5 - (-131.38 kJ, no
The standard free energy change of the reaction is -150.14 kJ and the reaction is spontaneous.
What is a spontaneous reaction?A spontaneous reaction is a reaction in which further supply of energy is not required once the reaction ha gotten underway. The standard enthalpy change of a reaction is obtained from;
ΣΔG°reactants - ΣΔG°products
Having applied this and from the values of the standard free energy of each specie, the standard free energy change of the reaction is -150.14 kJ and the reaction is spontaneous.
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what is matter? What is mixture?
Answer:
Matter is any substance that has mass and takes up space by having volume. Mixture is a substance made by mixing other substances together.
Matter is anything that has mass and occupies space.
Mixtures are substance composed of two or more constituents in physical combination.
What is matter?Matter is anything that has mass and occupies space.
Everything in the universe is composed of matter.
Matter exists in three states:
solid liquid gasWhat is a mixture?A mixture is a substance which is made up of two or more constituents physically combined together.
Mixtures are either homogenous or heterogeneous.
Examples of mixture are brass and salt solution.
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What is the difference between Speed and Velocity?
Does Jarren love Maria more or does Maria love Jarren more?
(Not for school)
Answer:
Maria
Explanation:
Answer:
Maria loves Jarren more is the answer.
Helped by QueenTlove Have an nice day
Chemical bonds __________.
a. take a long time to break.
b. are energy relationships between the electrons of the reacting atoms.
c. are energy relationships between the protons of the reacting atoms.
d. are physical structures that hold atoms together.
Answer:
c. are energy relationships between the protons of the reacting atoms.
Explanation:
can someone help me with this page? This is the first one I have to get done and I need the rhythm and ability do the other two
Answer: yeah it’s just a picture with it filled out ♀️
Explanation:
Which of the following adaptations does NOT help animals survive in areas covered with snow?
a thick fur to keep the body warm
a thick layer of fat that insulates the body
a dark-colored fur to catch their prey
a white-colored fur to hide from predators
Answer:
a dark-colored fur to catch their prey
Explanation:
In areas covered with snow, the temperatures are too low. Therefore, animals surviving in these areas require thick fur or body insulation to ensure their body temperature is regulated. The snow is white in color and therefore, being white in color helps the animals camouflage hence not visible to the predators.
Having a dark color, this will only expose these animals to their predators since the areas are covered with white snow. They will be easily traced by their predators and maybe selected out by nature.
Which of these statements about the Plum-Pudding Model is incorrect?
It was disproven by Ernest Rutherford.
It is a model of the atom that had electrons within a positively charged sphere.
It is a model of the atom that has electrons surrounding the nucleus.
It was proposed by J. J. Thomson.
Answer:
It is a model of the atom that has electrons surrounding the nucleus
Step by step explanation:
What kind of factors are light, temperature, and soil composition? biotic habitat ecological abiotic
Answer:
Your answer is D, Abiotic.
Hope this helped you!
Why does metal expand when heated?
Answer:
Metal expands when heated. Length, surface area and volume will increase with temperature. ... Thermal expansion occurs because heat increases the vibrations of the atoms in the metal
Explanation:
hope this help :)
Answer:
Length, surface area and volume will increase with temperature.
Explanation:
Metal expands when heated. Length, surface area and volume will increase with temperature. ... Thermal expansion occurs because heat increases the vibrations of the atoms in the metal
why are some bases insoluble?
Answer:
bases which are not soluble in water do not give the hydroxyl ions and so they are treated differently from soluble bases called alkalis.
What are the forces on the wooden block when it is resting on a bench
Answer:
As the angle the plane makes with the horizontal is increased, the magnitude of the force of static friction between the block and the plane (2) increases
Explanation:
Since the static frictional force between the block and the plane is given by F = μN where
μ = coefficient of static friction and
N = normal force on plane = component of weight of block perpendicular to the plane = Wcosθ where
W = weight of block and
θ = angle of inclined plane
Now, F = μN
F = μWcosθ
Since μ and W are constant, we see that
F ∝ cosθ and cosθ ∝ θ
So, F ∝ θ
Since the static frictional force is directly proportional to the angle the plane makes with the horizontal, when the angle the plane makes with the horizontal is increased, the static friction between the block and the plane increases.
So, As the angle the plane makes with the horizontal is increased, the magnitude of the force of static friction between the block and the plane (2) increases
When the sun,the moon,and the Earth are arranged in this order,a ______eclipse is most likely to occur
Answer:
Lunar
Otherwise its solar, but im 99% sure its Lunar
Answer:
Solar Eclipse.
Explanation:
not exactly sure
I need help with this whoever helps will get a surprise
Answer:
wish it helps anything else comment at my answer
calculate
the grams in 1.75 moles of H2SO4 and
round to the correct sig figs
Answer:
171.63734
Explanation:
Used a calculator lol
WW
Directions: Predict the products for each of the following reactions IN WORDS ONLY.
1. Calcium + Magnesium sulfide →
2. Sodium + Silver chloride →
3. Iron(II) sulfide + potassium →
4. Barium + Aluminum nitrate →
5. Potassium iodide + chlorine →
6. Zinc + Lead(IV) chloride →
7. Silver + sulfuric acid →
8. Barium
+
water →
9. Tin + hydrochloric acid →
10.
Gallium bromide + fluorine →
11.
Water + potassium →
Chemical reaction has to do with the interaction of substances to form a new substance sometimes involving the release of energy.
What is a chemical reaction?The term chemical reaction has to do with the interaction of substances to form a new substance sometimes involving the release of energy.
The following completes each of the equations shown;
1. Calcium + Magnesium sul-fide → calcium sul-fide + magnesium
2. Sodium + Silver chloride → sodium chloride + silver
3. Iron I I sul-fide + potassium → Potasium sul-fide + iron
4. /Ba/rium + Aluminum ni.trate → /Ba/rium n.itrate + aluminium
5. Potassium iodide + chlorine → Potassium chloride + i.odine
6. Zinc + Lead I V chloride → Zinc I I chloride + lea.d
7. Silver + sul-furic acid →Silver sul-fate + water
8. /Ba/rium + water → /Ba/rium hydroxide + hydrogen
9. T.in + hyd.rochloric acid → Ti.n IV chloride + hydrogen
10.G.allium br-omide + fl-uorine → Ga.lium fl-uoride + br-omine
11.Water + potassium → potassium hydroxide + hydrogen
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what systems might not work right when you have a cold
Answer:
hello :3
A cold is a contagious upper respiratory infection that affects your nose, throat, sinuses and trachea (windpipe).
Explanation:
have a nice day :3
Which consumers are cornivores
Answer:
Carnivores and omnivores are secondary consumers. Many carnivores eat herbivores. Some eat omnivores, and some eat other carnivores. Carnivores that consume other carnivores are called tertiary consumers.
E.g
Felines, ranging from domestic cats to lions, tigers, and other large predators.
Some canines, such as the Gray Wolf
Hyenas.
ferrets.
Polar Bears.
Pinnipeds ( seals, sea lions, walruses, etc.)
Birds of prey, including hawks, eagles, falcons, and owls.
LAST ATTEMPT PLS HELP!!!
What is the correct skeleton equation for the following reaction?
iron + oxygen --> iron(III) oxide
Fe +O—> FeO
Fe + O2 —> FeO2
Fe+ O2 —> Fe₂O₃
Fe + O —> Fe₂O₃
Fe +O2 =Fe2O3 is correct !
True or False: Increasing the amplitude
changes the wavelength.
Answer:
False
Explanation:
Amplitude does not affect wavelength
What force in liquids causes surface tension? covalent forces intermolecular forces intramolecular forces ionic forces.
Answer:
Intermolecular forces
Explanation:
Intermolecular forces cause surface tension.
Source info:
"Surface tension, capillary action, and viscosity are unique properties of liquids that depend on the nature of intermolecular interactions."
(11.S: Liquids and Intermolecular Forces (Summary)https://chem.libretexts.org )
Surface tension is said to be the result of the attraction between the particles present on the surface layer of the liquid matter. It is caused by intermolecular interactions. Thus, option b is correct.
What are intermolecular forces?Intermolecular interactions are the forces that are said to be secondary forces and allow the molecules to bond and interact together by the attractive and repulsive forces between the ions and the atoms.
The hydrogen bonds, ion-dipole, dipole-dipole, and dispersion forces are intermolecular interactions. They are not within but in between the molecules. They give rise to the surface tension in liquids that act cohesive and bind the various molecules in liquid together.
Therefore, option b. the intermolecular forces cause surface tension in liquids.
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Energy
In this scenario, electrical Energy is transferred to___Energy
Answer:
light
Explanation:
I'm not sure to my answer but hope it helps if it is correct:)
What is the volume, in liters, of
1.50 mol Cl, at STP?
STP signifies standard temperature and pressure. These conditions are at 1 atmospheric pressure and 0 degrees Celsus, It has been said that at these conditions, one mole of a gas molecule is 22.4 liters of volume.
1.50 mol Cl2( 22.4 L / mol) = 33.6 L Cl2
I WILL GIVE BRAINLEST !! I WILL GIVE BRAINLEST !!!!
For the complete redox reactions given, identify the oxidizing and reducing agents.
2Sr + O2 --> 2SrO
Answer:
OIL o RIG sr
2Sr will be oxidation because it'll loses (2) electrons to O2. So, oxidised to form 2SrO
O2 will be reduction because it'll gain (2) electrons from Sr
Sr is oxidised. Thus, reducing agent because it causes O2 to be reduced.
O2 is reduced. Thus, the oxidising agent because it causes Sr to be oxidised.
Reducing agent = Sr
Oxidising agent = O2
Hope this helps!