Answer:
Hope this helps!
Explanation:
How many moles are in 7.18x10^24 ions of mg
Answer:
11.93 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{7.18 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 11.92691...[/tex]
We have the final answer as
11.93 molesHope this helps you
12. Study the chemical reaction below, what are the product(s) in the reaction and what are the reactant(s) in the reaction (Short answer)
Aluminum + copper chloride ---> copper + aluminum chloride
Explanation:
The reactants are Aluminium and Copper chloride.
The products are Copper and Aluminium chloride.
We have a photon with the wavelength of 605 nm. What is the frequency of this
photon?
Answer:
Explanation:
Speed of light = Wavelength x Frequency.
605 nm x Frequency = 3x10^8 m/s
6.05 x 10^-7 m x Frequency = 3x10^8 m/s
Frequency = 4.96 x 10^14 Hz
Answer:
ν=4.96x10^14 Hz
Explanation:
c=λν
λ=wavelength
ν=frequency
in this problem:
c=3x10^8
λ=605x10^-9
so ν=c/λ
v=(3x10^8)/(605x10^-9)
v=4.96x10^14
please give thanks :)
Why do atoms become larger as you move down a group?
O The numbers of energy levels increase.
O Electron shielding increases.
O The decrease in ionization energy.
O The mass of the atom increases.
Explanation:
option C is the correct answer of this question
Fission U235 can produce what?
A Krypton
B Strontium
C Barium
D Xeonon
E All of the above
Answer:
A. krypton
Explanation:
give me brainly
The recessive allele tends to (blank) when it's in the presence of the dominant allele.
Answer:
The recessive allele tends to be masked when it's in the presence of the dominant allele.
Explanation:
Many of our traits are affected by our genes. From each of our parents, we receive one copy of every gene. These copies are called alleles.
There are different types of relationships that can occur between alleles. One of them is called dominance. This occurs when one allele masks the other, not allowing its effect to be expressed. The allele that masks the other is called the dominant allele (A), and the masked one is called the recessive allele (a). This means that an individual needs to have only one dominant allele in order for its effect to be expressed (AA or Aa). The effect of the recessive allele will be expressed only when an individual has both recessive alleles (aa).
Write three points that how chemical fertilizer impact the environment
Answer:
Chemical fertilizer impact the environment by the following ways:
Their overuse hardened the soilIt causes soil pollution.It decreases fertility of the soil and strengthen pesticides.Can I have an answer for this?
Mass of Aluminium: 27 [tex]\frac{gm}{mol}[/tex]
Mass of Ferous Oxide: 71.84 [tex]\frac{gm}{mol}[/tex]
Aluminium: 7.5 Moles Given
How many moles of Iron (II) oxide(FeO)?
_____________________________________SOLUTION:As there are 2 moles of aluminium involved and 3 moles of ferrous oxide So,
2 moles Al and 3 moles FeO
7.5 moles Al and x moles FeO
For X moles:
X = [tex]\frac{3\ x\ 7.5 }{2}[/tex]
X= [tex]\frac{22.5}{2}[/tex]
X= 11.25 [tex]\frac{gm}{mol}[/tex]
_____________________________________Best Regards,'Borz'What does percent composition tell you about a molecule?
A. It tells you how much of a molecule is made up of each element.
B. It tells you the ratio of elements in the molecular formula.
C. It gives you the total number of atoms in the molecule.
D. It tells you how the lements are arranged in the molecule.
Answer:
a
Explanation:
What is the electron configuration for Ti (titanium)?
Explanation:
Titanium is an element found in the d-block group on the periodic table. It is a transition element.
To write the electronic configuration of an element, we must know the number of electrons in them;
In a titanium atom, we have 22 electrons;
Shell notation = 2 8 10 2
Orbital notation = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d² 4s²
Answer: [Ar]4s^2 3d^2
Explanation:
A 30 kg wrecking ball was dropped from different heights.
30 kg Wrecking ball
Height dropped
Speed at impact
Energy at impact
Distance Object is moved
Trial 1
5m
9.9 m/s
1470 J
0 cm
Trial 2
7m
11.71 m/s
2058 J
3 cm
Trial 3
15m
17.15 m/s
4410 J
55 cm
Trial 4
25m
22.14 m/s
7350 J
120 cm
What is the relationship between drop height and energy at impact?
10 points
10. What is the correct order of your blood vessels from largest to
smallest?
a. veins arteries, capillaries
b. capillaries, veins, areteries
c. arteries, veins, capillaries
d. none of the above
0.500 L of a gas is collected at 2911 MM and 0°C. What will the volume be at STP?
Answer:
V₂ = 1.92 L
Explanation:
Given data:
Initial volume = 0.500 L
Initial pressure =2911 mmHg (2911/760 = 3.83 atm)
Initial temperature = 0 °C (0 +273 = 273 K)
Final temperature = 273 K
Final volume = ?
Final pressure = 1 atm
Solution:
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
by putting values,
V₂ = P₁V₁ T₂/ T₁ P₂
V₂ = 3.83 atm × 0.500 L × 273 K / 273 K × 1 atm
V₂ = 522.795 atm .L. K / 273 K.atm
V₂ = 1.92 L
Explain Nuclear Fusion vs Gravity a.Gravity pushes outward and Nuclear fusion pushes inward. b.Both gravity and nuclear fusion push inward. c.Both gravity and nuclear fusion push outward. d.Nuclear fusion pushes outward, and gravity pushes inward.
Answer:
d.
Explanation:
The term known as "Nuclear Fusion" is a very important concept in chemistry and it is studied mostly under the topic or aspect of Chemistry known as or called radioactivity. Nuclear Fusion is the kind of reaction in which two or more atomic nucleus combines to for bigger ones.
There is a saying that there is no life without nuclear fusion because it is the reaction that causes the stars to have light.
Option 'd' is correct. This is what happens in stars in order for light to be produced that is the inward movement of gravity and the outward movement of nuclear fusion.
Using VSEPR theory which of the following would be the correct shape for nitrogen trifluoride?
Answer:
trigonal pyramidal
Explanation:
In NF3, the nitrogen atom is sp3 hybridized. Now we must remember that according to the VSEPR theory, the number of electron pairs in the valence shell of the central atom in a molecule determines its shape.
Here, the nitrogen atom is the central atom and its outermost shell is surrounded by four electron pairs - one lone pair and three bond pairs. This means that it has a tetrahedral electron pair geometry.
However, due to the lone pair, the three fluorine atoms are arranged in a trigonal pyramidal geometry. Hence the correct shape of the molecule is trigonal pyramidal.
A saturated aqueous solution of sucrose contains 200 grams of sucrose and 100 grams of water. Which is the solvent: sucrose or water?
Answer:
The solvent is water
Explanation:
The solvent is the substance in the mixture that is able to dissolve the other substances. The solvent is usually the liquid.
In the problem is said: "A saturated aqueous solution", that means the solution is made by a solute that is in excess (Sucrose) dissolved in the solvent (Water).
The solvent is water
Drag the tiles to the correct boxes to complete the pairs.
Match the genetic mutations with their names.
Answer:
See below!
Explanation:
Translocation ⇒ CCGGTT + TTAGGC = CCGGTA + GTTGGC
A translocation is a change in location between two chromsomes.
Inversion ⇒ CTTAAT = TAATTC
An inversion is when a gene is flipped.
Deletion ⇒ CGAGGTT = CGTT
A deletion is when a part of gene is deleted.
Duplication ⇒ ATTCGG = ATTCGGATTCGG
A duplication is when a gene is duplicated.
Insertion ⇒ CTTAAT = CTTAACGCT
An insertion is when nucleotide bases are inserted into a gene.
Substitution ⇒ CGAT = CTAT
A substitution is when part of a gene is replaced with a different base pair.
How does the concept of action- reaction apply to the human body?
Answer:
The physical body of human work accosting to Action-Reaction law.
Explanation:
The rule of action-reaction state that an equivalent and reverse reaction occurs with any action. If one entity imposes force on a second entity, the second responds by exerting an equivalent force on first entity in the same direction.
What is happening to the total amount of water on earth?
Olt is increasing.
Olt is decreasing.
Otisn't changing.
Answer:
It isnt changing
Explanation:
It stays basically the same becuase it is considered a constant
explain faraday's law
Explanation:
Faraday's Law of Induction describes how an electric current produces a magnetic field and, conversely, how a changing magnetic field generates an electric current in a conductor. ... Magnetic induction makes possible the electric motors, generators and transformers that form the foundation of modern technology.
Which of these questions is testable in a scientific investigation?
A .Are plastics more toxic than wood when burned?B.Are mountains more beautiful than oceans?
C.Is science a better
subject to study than foreign language?
D.Does a red rose smell better than a pink rose?
Answer:
A
Explanation:
it is A because all of the other ones are opinions.
Answer:
A
Explanation:
x-rays had a frequency of about 3x10^18 determine it's wavelength (in nm) and energy per photon
Answer:
E = 19.89×10⁻¹⁶ J
λ = 1×10⁻¹ nm
Explanation:
Given data:
Frequency of xray = 3×10¹⁸ Hz
Wavelength of xray = ?
Energy of xray = ?
Solution:
speed of wave = wavelength × frequency
speed = 3×10⁸ m/s
3×10⁸ m/s = λ ×3×10¹⁸ s⁻¹
λ = 3×10⁸ m/s / 3×10¹⁸ s⁻¹
λ = 1×10⁻¹⁰m
m to nm:
λ = 1×10⁻¹⁰m×10⁹
λ = 1×10⁻¹ nm
Energy of x-ray:
E = h.f
h = plancks constant = 6.63×10⁻³⁴ Js
by putting values,
E = 6.63×10⁻³⁴ Js ×3×10¹⁸ s⁻ ¹
E = 19.89×10⁻¹⁶ J
What kind of bonding would exist between
sulfur and hydrogen?
Answer:
nonpolar covalent
Explanation:
Comparing their electronegativities will help determine the type of bond. Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. The difference in electronegativity (ΔEN) is used to determine bond type. Hydrogen has an electronegativity of 2.20 and sulfur has 2.58. The difference is 0.38,so the electrons are shared in a nonpolar covalent bond.
what does the slope of a distance vs time graph tell you? yes
Answer:
an increase of acceleration or decrease of acceleration
Explanation:
2×21=how many are there
The function of a specific enzyme is mostly determined by its
Answer:
What does the shape of an enzyme determine? The shape of the enzyme determines which chemical reaction it will speed up. -The region on an enzyme that the substrate fits into. ... The active site of an enzyme only fits one type of substrate molecule.
Explanation:
For an object to remain at rest, which of the following must be true?
The forces on it are balanced
There is no friction
Gravity does not act on it
The object has no mass
Answer: I believe that it is that the forces are balanced.
Explanation:
All of the following are alkaline earth metals except.
A) Barium
B) Calcium
C) Sodium
D) Magnesium
What type of change occurs as salt dissolves in water?
a)phase change
b)element change
c)physical change
d)chemical change
Answer :-
C) Physical change
How do waves travel through space?
Explanation:
Electromagnetic waves are waves which can travel through the vacuum of outer space. Electromagnetic waves are created by the vibration of an electric charge. This vibration creates a wave which has both an electric and a magnetic component.