Answer:
Heat
Explanation:
Higher temperatures cause solid solutes to dissolve at a faster rate than normal
Answer:
Higher temperature
Explanation:
Explain why the first ionisation energy of helium is
larger than that of hydrogen.
Answer
Explanation:
helium has a structure 1s² the electrons are removed from the same orbital as in case of hydrogen the electrons are closest to the nucleus the value of ionization energy of helium is much higher than hydrogen because the nucleus now has 2 proton attracting the electrons instead of 1 in case of hydrogenIf I add sugar into water then _________________
Pls help
Explanation:
When adding sugar to water it became a syrupy solution. Here sugar acts as solute, the water acts as solvent and syrupy acts as solution. When adding sugar to water, the disaccharide of sucrose is converted into monosaccharides of glucose and fructose
Answer:
syrupy solution
Can you tell me name of chemicals in sea Please?
this is my attachment answer hope it's helpful to you
Is water the only liquid? If not, name 5 more
Answer:
Is water the only liquid? If not, name 5 more
Water, ethanol, household bleach, blood, paint, milk, gasoline, mineral oil, acetone and butyl alcohol are examples of liquids. Liquids' properties allow them to flow or be poured easily into containers, lava
water is not the only liquid.
Answer:
apple juice, milk, smoothie, blood, urine
Is iodine a atom,a molecule,an ion or a formule unit?
Answer:
It's an atom
Explanation:
It can't be a molecule since it's only one element, the ion would've been Iodide (I-), and it's not a formula
muddy water is an example of ______mixtures
Answer:
suspensions of heterogeneous mixtures from which some of particles settle with time.
Answer:
Muddy water is an example of homogeneous mixture.
Which of the following is the correct Lewis structure for methane (CHA)?
O A. H-C-H
H
I-0-I
OB. H-H-C-H-H
0
H
O c. H:C:H
H
OD H-C-H
The correct lewis structure of methane(CH4)
C. H:C:H:H
What is the outcome of all chemical changes when two substances are combined?
Answer:
This is called a chemical reaction. gas may form.heat may be produced and the color may change
Which is one way scientist communicate the results of an experiment?
Answer:
By writing an experiment report
Explanation:
ANSWER ASAP WILL GIFT BRANILIEST Which of the following happens to a molecule of an object when the object is cooled? A Its temperature increases. B It loses kinetic energy. C Its size increases. D It moves faster.
Answer:
It loses kinetic energy.
Explanation:
The definition of heat is molecules moving fast, so it cooling would mean they slow down.
Answer:
B, It loses kinetic energy.
Explanation:
Does the wavelength of light (R.O.Y.G.B.I.V.) affect a plant’s growth?
Answer:
YES
Explanation:
If we put a plant in a room with an orange light source, then it will grow more efficiently than a plant exposed to other colors.
Yes the wavelength of light (R.O.Y.G.B.I.V.) affect a plant’s growth.
What is wavelength of light ?The wavelength of light can be defined as the distance between the two successive troughs of the light wave, and It is denoted by the Greek letter lambda (λ), simply it can be said as the distance between one crest or trough of one wave and the next wave is known as wavelength.
The Visible Light having wave length ranges from 400 nm to 700 nm and the spectrum of visible light has a number of colors having different wavelengths.
For example, The violet color have the shortest form of wavelength whereas the red color have the longest wavelength, wavelength is inversely proportional to the frequency like longer the wavelength of the light have lower is the frequency.
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2 Figure 3.1 shows two different forms of carbon, A and B.
A
B
Figure 3.1
a Name the two forms of carbon shown.
Answer:
show the pictures pls specify
Mike is gathering equipment for a lab where he will measure the masses of various
chemicals. Which of the following is the most complete list of the equipment he will
need?
electric balance, graduated cylinder, test tube
graduated cylinder test tube, goggles
O graduated cylinder beaker, test tube
electric balance, goggles, beaker
Answer:
electric balance, goggles, beaker
Explanation:
I did it and got it right
QIV: Give one example each of the following:
1. Opaque objects.
2. Non-luminous objects.
3. Homogeneous medium.
4. Heterogeneous medium.
5. Transparent objects.
6. Translucent objects.
7. Luminous objects.
8. Man made source of light.
9. Objects that reflect light.
Answer:
s
Explanation:
1- Wood
2-Moon
3-Pure water
4-Sand and water
5-Glass
6-Paper
7-Sun
8-Flashlights
9-Glass or polished metal
If you don't like my examples then sorry
A piece of wood displaces 12.5 mL of water and has a density of 0.97 g/ml. what is the mass of the piece of wood? what will happen if the wood is placed in water?
HELP PLEASE! ASAP YOUR DA BEST! 15 POINTS YALL
Density=0.97g/mL
Volume=12.5mL
[tex]\\ \sf \longmapsto Density=\dfrac{Mass}{Volume}[/tex]
[tex]\\ \rm\longmapsto Mass=Density(Volume)[/tex]
[tex]\\ \sf \longmapsto Mass=0.97(12.5)[/tex]
[tex]\\ \sf \longmapsto Mass=12.125g[/tex]
If a gas displays a solubility of 0.00290M at a partial pressure of 125 kPa, what is the proportionality constant for this gas in this solvent and at this temperature?
Answer:
The proportionality constant ( Henry’s constant) = 2.32 * 10^-5 M/kPa
Explanation:
Here in this question, we are concerned with calculating the proportionality constant for this gas.
Mathematically, we can get this from Henry law
From Henry law;
Concentration = Henry constant * partial pressure
Thus Henry constant = concentration/partial pressure
Henry constant = 0.00290 M/125 kPa = 2.32 * 10^-5 M/kPa
What happens when a metalloid gets heated up?
A: It acts as an insulator and slows the flow of electrons.
B:It blocks the flow of all electrons.
C:It conducts more electricity, allowing electrons to move more freely.
D:It becomes too dangerous for electricity to flow through it.
Answer:
it becomes too dangerous for electricity to flow through it
8th Grade Middle School Science
You measure the mass of an apple using a balance. You get these three measurements:
Trial 1: 167.0 g
Trial 2: 166.9 g
Trial 3: 167.2 g
You know that the true mass of the apple is 172 g. Describe your results in terms of precision and accuracy. Explain your answer.
Answer:
Your results are precise, but not very accurate.
Explanation:
The results are precise because each weight is close to the next. The weights are not accurate because they are pretty far from the true mass.
Answer:
The results of the three trials are accurate because there all very close to the correct mass of the apple is, 172 g. The results are precise because each weight is close to the next. The weights are not accurate because they are pretty far from the true mass.
Complete this sentence. If mass remains the same while the volume of a substance ________, the density of the substance will_______________.
Answer:
If mass remains the same while the volume of a substance changes, the density of the substance will also change.
Answer:
BELOW
Explanation:
If mass remains the same while the volume of a substance decreases the density of the substance will increase.
A wittig reaction occurs when 4-methylbenzaldehyde and benzyltriphenylphosphonium chloride are stirred together at room temperature in the presence of sodium hydroxide base. Draw the major isomer produced by this reaction.
Answer:
See explanation
Explanation:
The wittig reaction is an organic reaction in which an aldehyde or a ketone reacts with a phosphonium ylide to give an alkene. This phoshonium ylide that participates in the reaction is usually generated insitu in the system by reaction of an alky or aryl triphenylphosphonium halide salt with a base(sodium hydroxide is mostly used).
In this particular reaction 4-methylbenzaldehyde and benzyltriphenylphosphonium chloride were reacted together in the presence of sodium hydroxide and the product with the structure shown in the answer was obtained as the major isomer produced in the reaction.
Which missing item would complete this alpha decay reaction?
21CF-247 Cm +
Answer:
the atomic number decreased in 2, from 100 to 100 - 2 = 98. 3) Hence the formed atom has atomic number 98, which is californium, Cf, and the isotope is californium - 253. 4) The item that completes the given alpha decay reaction is: ₉₈²⁵³ Cf.
Explanation:
which of the following is soluble in water?
1-glycerin
2-sand
3-iron filing
4-oil
Answer:
glycerin
Explanation:
Glycerol is easily soluble in water, because the ability of the polyol groups to form hydrogen bonds with water molecules.
to Separate camphor from sand we use_______process.
Answer:
to Separate camphor from sand we use sublimation process.Hope it is helpful to youWhat three things are required for a fire to start?
Electric current is the flow of charged particles called ________ protons. electrons. sparks. static.
Answer: Electrons
Explanation: Electric current is the flow of charged particles called electrons.
Electric current is the flow of charged particles called electrons. Therefore, option (B) is correct.
What is electric current?An electric current can be described as the stream of charged particles such as electrons flowing through a conductor. The electric current can be determined as the net flow of the charge through the surface of the conductor.
The S.I. unit of the current is ampere which can be defined as the rate of flow of 1-coulomb charge in 1 second.
Electric current can be described as the flow of electrons through the electric conductor. The flow of the free electrons in the conductor creates the electric current.
A continuous source of electrons is needed to generate the electric current. The circuit must be closed so that the electrons can easily flow then only the electric current will flow through it.
Therefore, electrons are the charged particles whose flow produces an electric current.
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9.7300x10^2
+
9.8700x10^3
[?]x10^[?]
Answer:
1.0843×10^4
Explanation:
If we are to add 9.7300x10^2 + 9.8700x10^3, we must first make the powers of the both to be be the same so that we can carry out any mathematical manipulation of interest. So we can have;
9.7300x10^2 + 98.700x10^2
When we now add the both we have (9.7300 + 98.700)×10^2.
This now gives us the result, 108.43×10^2 which is correctly written as 1.0843×10^4, according to the rules of writing in scientific notation.
What happens when two objects when they are brought closer together The mass of both objects decrease The mass of both objects increase The gravitational force between them decreases The gravitational force between them increases
Answer:
The correct option is
The gravitational force between them increases
Explanation:
According to Newton's law of universal gravitation states that the force of attraction between two bodies is directly proportional to the product of the masses of the bodies and inversely proportional to the square of the distance of their centers from each other.
The formula for universal gravitation is given as follows;
[tex]F_{1} = F_{2} =G \times \dfrac{m_{1} \times m_{2}}{r^{2}}[/tex]
Where;
F₁, and F₂ = The gravitational forces of attraction on each mass
G = The gravitational constant
m₁ = The mass of one body
m₂ = The mass of the body
r = The distance between the centers of the two bodies
Therefore, the gravitational force of attraction on each object is inversely proportional to the as the distance between the centers of the two bodies
When the distance between the centers of the two bodies decreases, the two objects are brought closer together, the gravitational force of attraction between them increases.
Answer:
Gravitational force between two objects of masses m1/m2
Explanation:
is defined by Gm1xm2/r^2, where G is a universal constant, and r is the distance between the masses. This shows you why B is wrong; it would increase. Also, A is not a good choice, as shown. In the case of B, it would increase by say, 2/1 to 4/1 by doubling ones mass. In C's case the bottom would decrease on the fraction alot (square) if they were moved closer, thus the force would be greater.
Explanation:
in other words the answer is The gravitational force between them increases
Which of these equations for the
formation of an oxide ion is correct?
0 + 2e" --> 02-
0 --> 02- + 2e
Answer:
A
Explanation:
Because of the cathode
Are all elements atoms and are all atoms elements?
Answer:
yes
Explanation:
because is smallest element that are made up of atom
Answer: Yes
Explanation:
Difference between atomic number and atomic weight any 2 points
Answer:
According to the definitions given, atomic mass which is also called atomic weight is the measured total mass of an element's atom. Whereas, atomic number is nothing but the total number of neutrons and protons in the nucleus of an atom....
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