Answer:
the solid is so hard
Explanation:
yan na po sana makatulong po heheheh
Metals such as Gallium and mercury are different from that of other metals like aluminium because they are liquid at room temperature. This is because of valence electrons which are relatively free in these metals.
What are Metals?
All the metals except mercury and gallium are solids at room temperature. These metals are liquids because of both the high electrical conductivity and the thermal conductivity which come from the fact that one or more valence electrons is relatively free in these atoms to travel throughout the solid metal. This has been formalized in the Wiedemann-Franz law.
Both Gallium and mercury are unique elements (metals) which occur in the liquid state at near the room temperature. It is important here to note that mercury is essentially a liquid at room temperature while gallium becomes liquid at temperature near to room temperature. They both melt very easily due to the low melting temperature values.
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Anna notices that different types of clothing stick together when they are dried in an electric dryer. When the clothes are pulled apart, they make sparks and a crackling sound due to electric forces of attraction. How can Anna reduce the amount the clothing clings together in the dryer?
Add a substance to the wash that reduces the number of charges transferred.
Increase the temperature of the air in the dryer to weaken the electric forces.
Dry more clothes at the same time so that there is less room for electric forces.
Change the charges on the clothes by running the dryer at a faster speed.
Answer:
A: Add a substance to the wash that reduces the number of charges transferred.
Explanation:
The attraction between opposite charges make the clothes attract together. To reduce them Increase the temperature of the air in the dryer to weaken the electric forces. Hence, option A is correct.
What is electric dryer?An electric dryer is used to dry the clothes and hair or other substances using electric current. A substance can have both negative and positive charges. The opposite charges will attract together while the negative charges repel.
By exposing clothes to electric dryer it will gain electrons from the dryer and the positive poles of the clothes will attracts it. The electric current from the dryer will make clothes temporarily polarised.
If temperature increases, the intermolecular force of attraction decreases by making the kinetic energy of molecules raised. Therefore by increasing the temperature of air from the dryer the attraction can be reduced.
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which electrons in an atom have the highest energy level
If a sample of gas has a volume of 200 ml at a pressure of 700 mm Hg. What will be its pressure if its volume is reduced to 100 ml?
What volume (in L) of water vapor will be
produced from the reaction of 4.95 L of ethane
(C2He)?
2C2H6(g) + 702(9) — 4CO2(g) + 6H2O(g)
Answer:
14.85L of water are produced
Explanation:
Based on Avigadro's law, the volume is directly proportional to the moles of a gas.
Based on the equation:
2C₂H₆(g) + 7O₂(g) → 4CO₂(g) + 6H₂O(g)
2 moles of ethane produce 6 moles of H₂O.
Using Avogadro's law: 2L of ethane produce 6L of H₂O.
The addition of 4.95L of ethane are:
4.95L ethane * (6L H₂O / 2L C₂H₆) =
14.85L of water are produced
How can we use the study of genetics to help determine traits in organisms? Your answer must be in three complete sentences
Answer:
Genetics is the scientific study of inherited variation. Human genetics, then, is the scientific study of inherited human variation.
Why study human genetics? One reason is simply an interest in better understanding ourselves. As a branch of genetics, human genetics concerns itself with what most of us consider to be the most interesting species on earth
can someone answer a and b to the file attached?
Explanation:
The equation of the reaction is given as;
12C + 16 H2 --> 4 C3H8
a. Simplify the equation;
The coefficients are 12, 16 and 4.
4 is a common factor, so divide all through by 4.
12/4 = 3, 16/4 = 4, 4/4 = 1
The equation is given as;
3 C + 4 H2 --> C3H8
b. If 21 moles of C3H8 are formed, how many moles of C was needed.
From the reaction;
3 mol C atoms reacts to form 1 mol of C3H8
x mol would react to form 21 moles of C3H8
3 = 1
x = 21
x = 21 * 3
x = 63 moles
a sample of nitrogen gas occupies 1.55l at 27.0c and 1.00 atm what will the volume be at -100.0c and the same pressure
V₂=0.894 L
Further explanationGiven
V₁=1.55 L
T₁=27 + 273 = 300 K
P₁=1 atm
T₂=-100+273 = 173 K
Required
The final volume(V₂)
Solution
Charles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
Input the value :
V₂=V₁T₂/T₁
V₂=1.55 x 173/300
V₂=0.894 L
List the phase changes that result of an increase of molecular kinetic energy pls help!! 30 points!
Answer:
Explanation:
The term change of phase means the same thing as the term change of state. ... i.e. during phase change, the energy supplied is used only to separate the molecules ; no part of it is used to increase the kinetic energy of the molecules. So its temperature will not rise, since kinetic energy of molecules remains the same.
If you throw a basketball to a friend while you are sitting or standing on a skateboard, what will happen to you when you throw the ball?
Answer:
You will more than likely fall or get pushed back a little
Explanation:
Answer
Depends on if you're good on a skateboard or not.
Explanation:
If you're good: Then you wont fall
If you're bad: Then you might fall
Can't tell if this is an actual school question or not, lol
But I hope it helps, :)
How do CFC’s illustrate that technical advances can be a “double-edged” sword?
Answer:
CFC’s illustrate that technical advances can be a “double-edged” sword as CFC's were made for the advantages but soon or later it came as a disadvantage for environment.
CFC's was discovered with many advantages such as they are stable, non-corrosive, and replacement of harmful ammonia used in refrigerators and air conditioning systems. But soon it is also discovered that CFC's are destroying the upper atmosphere layer called ozone, which is a very big disadvantage for us. CFCs are major contributor to global warming after carbon dioxide.
Hence, it proves that CFC’s shows how technological advancement can be “double-edged” sword.
Which electromagnetic wave has the shortest
wavelength? Describe the energy level and
frequency of this wave.
Answer:
The electromagnetic spectrum
Explanation:
ranges from gamma (γ) radiation, which has the shortest wavelength, highest frequency, and greatest energy
please help
find the percent composition of Li2O , round to the tenths place
What is a measurement of the electromagnetic field’s alignment?
Answer:
Explanation:
Magnetic fields can be measured in various ways. If this device, called a dip meter, is first aligned in the direction of the magnetic meridian as defined by a compass, the needle lines up with the total field vector and measures the inclination angle I
The maximum and minimum oxidation state that can be shown by iodine respectively is
A. +3, -1
B. +7, -1
C. +5, 0
D. +1, 0
Answer:
B -1 and +7
Explanation:
Iodine shows oxidation states of −1, +1, +3, +5, or +7.
Practice working with numbers that have exponents. In the blank provided, write greater than, less than, or equals.
a. 10–2 ____________________ 10–3
b. 10–14 ____________________ 101
c. 10–7 ____________________ 0.0000001
d. 100 ____________________ 101
Answer:
a. 10⁻² > 10⁻³
b. 10⁻¹⁴ < 10¹
c. 10⁻⁷ = 0.0000001
d. 100 > 10¹
Explanation:
a. 10⁻² > 10⁻³We can rewrite those numbers as 0.01 and 0.001. That way the answer becomes clearer.
b. 10⁻¹⁴ < 10¹Any positive number with a negative exponent will be less than 1.
c. 10⁻⁷ = 0.0000001In the decimal, the 1 is exactly 6 zeros away from the dot, meaning the 1 is in the seventh place.
d. 100 > 10¹10¹ is equal to 10.
When sodium peroxide is added to water, sodium hydroxide and oxygen gas is produced.
Answer:
The reaction combines the sodium with the hydrogen and oxygen in water to form sodium hydroxide and hydrogen gas, and you get a lot of energy released as heat as well. This heat actually melts any remaining sodium that has not reacted yet, and ignites the hydrogen gas, so you get the bang and the flash.
Explanation:
Turgor pressure can help plants move. Internal water pressure can cause -
What is the term for electrons that are not held within a bond?
Answer:
lone pairs. pairs of valence electrons that are not involved in covalent bond formation, unshared pairs of electrons.
Explanation:
I have multiple stochiometry questions; could someone please help me out and give an explination? I'd greatly appreciate it, and I'll give brainliest to whoever helps me out! ^^
Answer 1- 233.07
Answer 2- 491.07
Answer 3 - 6.05
Answer 4 - 28.02
What is always conserved in both physical and chemical changes, explain?
5. If all the particles in a material are made up of
several smaller particles, and every larger particle
is identical, is the material a pure substance or
not? Explain your reasoning.
Plz answer correctly.. I need it ASAP
If all the particles in a material are made up of
several smaller particles, and every larger particle
is identical, is the material a pure substance or
not? Explain your reasoning.
A pure substance is something like a compound and element. This material made of several particles which seem to be two different particles, I believe, is a mixture. So, it is not a pure substance mixtures are made up of more than one particle while compounds (In a fixed ratio, the fusion of two or more than two atoms) and elements are made up of one molecule essentially.
The given material is not a pure substance as it is made up of several smaller particles and some larger particles that are identical.
What is pure substance?A pure substance is defined as a substance that has fixed chemical composition throughout the substance. A pure substance are not necessarily have to be of single substance or compound.
The given material is not a pure substance because it is made up of several different small particles. The material is made up of both small particle and large particles and both the particle do not have similar composition.
A pure substance is a homogeneous mixture. These substance has similar composition throughout the substance size of the particle does not matter.
Thus, it is not a pure substance as it is made up of several smaller particles and some larger particles that are identical.
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How does the rate of temperature change depend on the temperature difference of the two beakers?
Answer:
give it your all but know your limits
Explanation:
CO2
+
NaOH
<=>
NaHCO3
Balance
Answer:
Explanation:
It is balaned
Left side
1 Na
1 C
3 Os
1 H
=========
Right side
1 Na
1 H
1 C
3 Os
Answer:
CO2 + NaOH = NaHCO3 and the reaction type is synthesis ( this was already balanced)
Explanation:
I took out the <> to get CO2 + NaOH = NaHCO3
CO2- molar mass= 44.0095
NaOH- molar mass= 39.99710928
NaHCO3- molar mass= 84.00660928
how many grams of Ca(OH)2 are needed to produce 500ml of 1.66 M Ca(OH)2 solution
how many moles are in 6.31x10^24 C atoms
Answer:
Explanation:
1 mol of any chemical is 6.02 * 10^23
x mol of any chemical is 6.31 * 10^24
You should look at this before you put it in your calculator. You should think roughly 10.
Now you can set it up as a proportion
1/x = 6.02 * 10^23/6.31 * 10^24 Cross multiply
6.02 * 10^23 x = 1 * 6.31 * 10^24 Divide by 6.02 * 10^23
x = 6.31 * 10^24 / 6.02 * 10^23
x = 10.48 mols.
If 5.3 moles of magnesium phosphate react with excess sodium chloride how many moles of magnesium chloride will be formed?
1.) What is the maximum number of grams of liquid water at 10C that can be heated to
30C by the addition of 84 joules of heat?
Answer:
m = 1 gram
Explanation:
Given that,
Heat, Q = 84 J
The temperature increases from 10°C to 30°C.
We need to find maximum number of grams of liquid water. We know that the heat required is given by :
[tex]Q=mc\Delta T[/tex]
c is specific heat of water, c = 4,200 J/kg°C
Use the above formula to find m. So,
[tex]m=\dfrac{Q}{c\Delta T}\\\\m=\dfrac{84}{4,200\times (30-10)}\\\\m=0.001\ kg[/tex]
or
m = 1 gram
So, the required mass is 1 gram.
Could someone please help me? You can ignore number 3
For Number 2)
THE ELEMENTS TEND TO FORM COMPOUNDS BECAUSE AOMS ARE UNSTABLE AND CAN SHARE ELECTRONS IN THIER OUTER ENERGY LEVELS .
AS WE KNOW, ATOMS OF AN ELEMENT BECOMES MORE STABLE BY LOSING , GAINING AND SHARING ELECTRONS.
Elements react with each other to complete their octet or duplet so as to become stavle in nature. For e.g. Carbon reacts with oxygen to form carbon dioxide. Carbon reacts with four molecules of hydrogen to form methane - CH4.
How many atoms of nitrogen appear to be on the reactant side?
Electron dot diagram for four elements are shown. Which element would be found in Group 13?
Answer:
D. 1
Explanation:
Just took it :)
The element that would be found in Group 13 is
D. 1
The electron dot structure has three valence electrons.
Group-13 elements:
Group-13 is also known as the Boron family. This group belongs to p-block elements. The elements of this group will have three electrons in their outermost shell i.e. 3 valence electrons.
Example: Boron has atomic number 5.
Electronic configuration of Boron: [tex]1s^2 2s^2 2p^1[/tex]
Thus, the electron dot structure for group-13 is option D i.e. 1.
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