*Visual
*Independent
*Dependent
how are subtances dissolved ?
Answer: A solute dissolves because its particles interact with the particles of a solvent. Anything that allows more solvent to touch more solute will cause a solute to dissolve more quickly. Small pieces of a substance dissolve faster than large pieces.
Sugar is added to iced tea and the contents are stirred until all of the sugar dissolves. How would the tea now be classified?
Calculate the volume of this irregular solid to the nearest cubic centimeter.
What is the volume of the key?
Answer:
The answer is 8cm
Explanation:
:)
Answer:
8 cm
Explanation:
Forces can be represented by _____,
called vectors, that show the direction of a force.
Answer:
vector
Explanation:
An atom has a mass number of 43 and an
atomic number of 23. How many protons
does it have?
Answer:
23 because the atomic number is base on protons and electrons and the neutrons is 20 hope it help
Heat is most closely related to which kind of energy? O nuclear Oelectrical thermal chemical
Answer:
thermal
Explanation:
Answer:
thermal energy
Explanation:
because thermal energy produces heat
Observe: Scandium is the first element to contain electrons in the d subshell. How many orbitals does the d subshell have, and how many electrons can fit in the d subshell?
Answer: 5 orbitals
Explanation:
Each d subshell has 5 orbitals, with 10 electrons. So it's like for every orbital, there are 2 electrons. Look at orbital diagrams (if your teacher made you draw them), and you will see that an arrow pointing both UP AND DOWN represent 2 electrons (arrow upward=1 electron, arrow downward=1 electron)
Here, we are required to determine how many orbitals does the d subshell have, and how many electrons can fit in the d subshell.
The d subshell has 5 orbitals.The number of electrons that can fit in the d subshell is; 10 electronsThe d subshell is first recorded in the shell with energy level 3.
The orbitals in an atom are organized into different layers or electron shells. The d subshell has 5 orbitals in it.
This is evident from the formular; 2l + 1.
where l = 2 for the d subshell.
As with any sub-orbital, the sub-orbitals in the d-subshell also contain 2 electrons each.
According to Pauli's exclusion principle, the two electrons in each must have opposing spin.
Read more:
https://brainly.com/question/8240496
10. If the number of particles in the left box above were doubled, what would happen to the pressure of the
gas? Explain.
A. The pressure of the gas on the left would decrease because the number of collisions would also
decrease.
B. The pressure of the gas on the left stay the same because the number of collisions would also be the
same
C. The pressure of the gas on the left would decrease because the number of collisions would increase.
D. The pressure of the gas on the left would double because the number of collisions would also double.
Answer:
D. The pressure of the gas on the left would double because the number of collisions would also double.
Explanation:
According to Boyle’s law, the pressure of a gas is inversely proportional to its volume.
As the number of particles was doubled in the left box, the particles have less space for movement as the volume occupied by gas particles has decreased and it will lead to the collision of gas particles with the walls of the container.
As the volume decreases as gas particles were doubled and so the pressure of the gas on the left would double.
Hence, the correct answer is "D. The pressure of the gas on the left would double because the number of collisions would also double."
One hundred students were surveyed about who they would vote for. What is
the best way to display the results? Explain your answer.
CAN SOMEONE PLEASE HELP ME ASAP PLEASEE ANYBODY LITERALLY ANYONE OUT THERE PLEASE
It is the number of protons that determine
determine what?
why are lithium and sodium similar
Answer:
Lithium, sodium, potassium, rubidium, and cesium are all part of a group called the alkali metals. ... They are all soft metals in elemental form and they all react violently with water. They react so strongly because they all readily lose an electron to form the +1 cation very easily.
Family members on a camping trip decide to make hot cocoa after dinner. They add instant cocoa mix to hot water. What can they do to make the cocoa mix dissolve faster?
A stir the hot cocoa
B halve the amount of water
C double the amount of cocoa mix added
D add the cocoa mix after the water cools
Answer:
Your ANSWER:
A.stir the hot cocoa
Explanation:
stirring helps particals dissolve faster
A ____________ contains specific instructions for making proteins.
a.
chromosome
b.
gene
c.
molecule
d.
ribosome
Calculate the answer. Express It In scientific notation. All answers should have the correct number of significant figures.
(4.9 x 10^-2) (9.80 x 10^2) =
48.02
48
48 x 10^-1
4.8 x 10^1
Answer:
4.8 x 10^1
Explanation:
Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10. If the decimal is being moved t the right, exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.
The orbital diagram shows the valence electrons of sulfur, which has 16 electrons. If the electrons were added to the atom one at a time, which would be the last electron to occupy an orbital?
Answer:
3px
Explanation:
The electronic configuration of sulphur is given as;
1s2 2s2 2p6 3s2 3px2 3py1 3pz1.
Recall that in accordance with Hund's rule, electrons occur singly first before pairing takes place during the filling of degenerate orbitals.
The last sub-level into which electrons are filled in sulphur is the 3p sub-level having three degenerate orbitals, 3px, 3py and 3pz.
According to Hund's rule, these levels are first singly filled before pairing begins. Hence the last electron in sulphur goes into the 3px orbital.
Answer:
3px
Explanation:
The electronic configuration of sulphur is given as;
1s2 2s2 2p6 3s2 3px2 3py1 3pz1.
Recall that in accordance with Hund's rule, electrons occur singly first before pairing takes place during the filling of degenerate orbitals.
The last sub-level into which electrons are filled in sulphur is the 3p sub-level having three degenerate orbitals, 3px, 3py and 3pz.
According to Hund's rule, these levels are first singly filled before pairing begins. Hence the last electron in sulphur goes into the 3px orbital.
Explanation:
Ciara’s bike has rusted, which means that the iron in the metal changed to rust.
What has occurred?
an energy formation
an exothermic reaction
a chemical reaction
a precipitate formation
Answer:
CChem Reaction
Explanation:
Cuz it big brain time
The iron in the metal changed to rust, which is a chemical reaction. Therefore, option (C) is correct.
What is the rusting of iron?The rusting of iron is an oxidation reaction in which the iron combines with oxygen in the air in the presence of water to produce Fe₂O₃.xH₂O, a hydrated iron (III) oxide.
This hydrated iron (Ill) oxide is rust and the color of rust is reddish-brown. This reddish-brown rust can be seen on iron nails, pipes, and railings. on. Rust is formed when the iron is exposed to oxygen in the presence of moisture and is not an instantaneous reaction. Rusting of iron takes place over a long period of time.
Fe (s) + O₂ (g) + xH₂O (l) → Fe₂O₃. xH₂O (s)
The oxidation state of iron increases which is followed by the loss of electrons as a result of the rusting reaction. Iron(III) oxide or ferric oxide has the iron atom has an oxidation state of +3.
Learn more about rusting of iron, here:
https://brainly.com/question/18376414
#SPJ6
TRIPLE POINTS!!! I NEED HELP!!! PLEASE EXPLAIN TOO!!! What is the energy of a quantum of light with a frequency of 4.31 x 1014 1/s or Hz?
Answer:
The answer is
[tex]2.86 \times {10}^{ - 19} \: J[/tex]
Explanation:
The energy of a quantum of light can be found by using the formula
E = hfwhere
E is the energy
f is the frequency
h is the Planck's constant which is
6.626 × 10-³⁴ Js
From the question
f = 4.31 × 10¹⁴ Hz
We have
E = 4.31 × 10¹⁴ × 6.626 × 10-³⁴
We have the final answer as
[tex]2.86 \times {10}^{ - 19} \: J[/tex]
Hope this helps you
Explain why the mass number of oxygen is 16
Answer:
Oxygen has an atomic number of 8 , and the mass number of an atom is the sum of its atomic number plus its neutron number. We got the mass as 16 units, and so it'll have 16−8=8 neutrons.
Explanation:
A small block of wood floats on water. It has a volume of 25cm^3 and a mass of 20 grams. What is the density of the wood?
Answer:
The answer is 0.8 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{20}{25} = \frac{4}{5} \\ [/tex]
We have the final answer as
0.8 g/cm³Hope this helps you
A foam square has a mass of 25 g and a volume of 90 mL. What is the density?
Answer:
The answer is 0.28 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
So we have
[tex]density = \frac{25}{90} = \frac{5}{18} \\ = 0.277777...[/tex]
We have the final answer as
0.28 g/mLHope this helps you
what is the answer to 2.5 * 22.5
Help me balance this equation please.
NaCl + H2O —→ Cl2+ NaOH + H2
Answer:
2NaCl + 2H2O --> Cl2 + 2NaOH + H2
Explanation:
What is the rule of zero charge?
Answer:
The nonmetal atoms accept electrons and form ions with a negative charge, called anions. When an ionic compound forms, the total charge on the atoms adds up to zero. This is known as the rule of zero charge.
Explanation:
Determine the average atomic mass of the following mixture of isotopes of Potassium:
(93.12%) 38.963 amu
(6.88 %) 40.962 amu
Answer
the first one (im pretty sure)
Explanation:
Which of the following properly explains what takes place when light hits polarized film?
A) The intensity of the light is simply dimmed
B)The planes of light become scattered
C)The scattered light has either the horizontal plane or the vertical plane blocked
D)The intensity of the light is brighten
Answer:
C)The scattered light has either the horizontal plane or the vertical plane blocked
Explanation:
When light becomes plane polarized, it means that light is made to vibrate in only one plane.
Light usually vibrate in vertical and horizontal directions but when light becomes polarized, either the vertical or horizontal direction is blocked and it is made to vibrate in only one direction
Carbon and hydrogen forms three different compounds A, B and C in which the percentage of carbon are 75%, 85.7% and 92.3% respectively. Which law of chemical composition can be illustrated with these data?
Answer:
Law of multiple proportions
Explanation:
The law which is illustrated with the data suggests the law of multiple proportion.
The combining elements are carbon and hydrogen;
Law of multiple proportions states that "if two element combine together to form tow or more different compounds, the masses of one of the elements which separately combine with a fixed mass of the other element are in a simple ratio".
Let us prove the law of multiple proportion:
In A;
C = 75% H = 25% = 3:1
B;
C = 85.7 H =14.3 = 6:1
C;
C = 92.3 H = 7.7 = 12:1
We see that both carbon and hydrogen have a fixed ratio.
What is the average atomic mass for Element X?
Answer:
the average atomic mass for element X is 28
One of the uses of methanol (CH3OH) in dilute form is as a windshield washer antifreeze. In pure form, methanol has a molar concentration of 24.7M. How many moles are contained in 500 mL of solution?
Mole itself is the number of particles contained in a substance
1 mole = 6.02.10²³ particles
Mole : the ratio of the amount of substance mass and its molar mass
[tex]\large{\boxed{\boxed{\bold{mole=\frac{mass}{molar\:mass}}}}[/tex]
Molarity is a way to express the concentration of the solution
Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution
[tex]\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}[/tex]
Molar concentration of methanol=24.7 M
Volume of solution = 500 ml = 0.5 L
[tex]\tt mol=M\times V\\\\mol=24.7\times 0.5\\\\mol=12.35[/tex]
A lunar eclipse is when the sun goes in front of the Moon?
Answer:
Explanation: When the Moon passes between Sun and Earth, the lunar shadow is seen as a solar eclipse on Earth. When Earth passes directly between Sun and Moon, its shadow creates a lunar eclipse. Lunar eclipses can only happen when the Moon is opposite the Sun in the sky, a monthly occurrence we know as a full Moon. Hope this helps and u have a good day <3
Which word names melted rock and minerals found beneath Earth's crust?
A.lava
B.magma
C.rhyolite
D.gabbro
Answer:
B: Magma
Explanation:
technically magma is the name for the hot molten rock (mixed with gases and mineral crystals) that collects in chambers beneath the Earth's crust.
The crust has been the upper layer of the earth's geosphere. It has been characterized by the presence of melted rocks and minerals that are called magma. Thus, option A is correct.
What is magma?Magma has been defined as the hot semi-liquid president beneath the earth's surface in the crust layer. It has a very high temperature and is known to have many metals and minerals dissolved in it. The magma comprises metals minerals, dissolved gases, etc.
When the magma from the magma chambers flows outwards on the earth's surface then it is called lava. This lava on cooling produces igneous rocks. This event of magma explosion and lava formation along with other gases from a mountainous surface is called volcanic eruption.
Therefore, option A. melted rock and minerals in Earth's crust is called magma.
Learn more about magma, here:
https://brainly.com/question/23661578
#SPJ2