Answer: Ok
Explanation:
Chlorine is in Group 7 of the periodic table. Therefore a chlorine atom has 7 electrons in its outer shell. this atom needs one more electron to form an ion with a full outer shellChlorine is in Group 7 of the periodic table. Therefore a chlorine atom has 7 electrons in its outer shell. this atom needs one more electron to form an ion with a full outer shell
A) moles are in a 60-gram sample of NaCl?
1.02 moles of NaCl are present in 60 grams sample of NaCl (sodium chloride).
How we calculate moles from grams?Moles of any substance is calculated as:
n = W/M, where
W = given mass of NaCl = 60 grams (given)
M = molar mass of NaCl = 58.44 g/mole
On putting these values in the above equation, we get
n = 60 / 58.44 = 1.02 moles
Hence, 1.02 moles are present.
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What is the volume of SO3 in 835 g SO3?
Which compound is insoluble in water?
A) calcium bromide
B) potassium bromide
C) silver bromide
D) sodium bromide
Answer:
C) silver bromide
Explanation:
Calcium bromide is incorrect.
The compound which is insoluble in water is silver bromide (AgBr).
Which compounds are insoluble in water?Those compounds which have high attraction force between their constitutes ions as compare to ions between the water and compounds are insoluble in water.
Among given compounds all are soluble in water except silver bromide, because silver is having high nuclear charge than other given alkali metals as calcium, potassium and sodium. So it tightly attracts the bromide ion towards itself and this attraction is more than the attraction between the H⁺ ion of water and bromide ion, as a result of which it is insoluble in water.
Hence, option (C) is correct i.e. silver bromide.
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Please help me with chemistry.
Choose the answer that best explains why Orion is important to star watchers.
Orion is located on the celestial equator. Its location causes the rest of the stars to appear to revolve around Orion as the Earth rotates.
Since Orion can be seen in both the Southern and Northern Hemispheres it is useful for finding north in the night sky.
Orion, the hunter, was an important figure in Greek Mythology making the constellation of central importance to astronomers.
Orion is easy to locate, it can be seen in both hemispheres and is helpful for locating prominent stars, nebulas and surrounding constellations.
Answer:
Orion is located on the celestial equator. Its location causes the rest of the stars to appear to revolve around Orion as the Earth rotates.
Explanation:
The above stated statement is the reason why those who watches for stars commonly called the star watchers use the Orion as their base point in star observation. Without this, it would be difficult to trace the stars or know the exact ones which appears on the sky.
Help!!!!
What is the atom with 10 kernel electrons and 5 valence electrons?
and
What has a + 1 charge and has 8 valence electrons in the third major energy level?
Answer:
!atoms in the nitrogen family.. have 5 valence electrons. They tend to share electrons when they bond. Other elements in this family are phosphorus, arsenic, antimony, and bismuth.
N2 + 3H2 + 2NH3 .
28.0 grams of N2 and 5.04 grams of H2 are reacted, producing 17.8 grams of NH3. What is the percent yield?
1. 62.9%
2. 84.0%
3. 52.4%
4. Not enough information is given.
5. 34.0%
6. 14.7%
7. 191%
If 28.0 grams of N2 and 5.04 grams of H2 are reacted, producing 17.8 grams of NH3. the percent yield is 52.4%. Therefore, the answer is option 3,
To calculate the percent yield, we first need to calculate the theoretical yield of NH3 based on the amounts of N2 and H2 that were reacted.
The balanced chemical equation for the reaction is:
N2 + 3H2 → 2NH3
From the equation, we can see that 1 mole of N2 reacts with 3 moles of H2 to produce 2 moles of NH3. Therefore, the moles of N2 and H2 reacted can be calculated as:
moles of N2 = mass of N2 / molar mass of N2
= 28.0 g / 28.014 g/mol
= 0.999 mol
moles of H2 = mass of H2 / molar mass of H2
= 5.04 g / 2.016 g/mol
= 2.5 mol
Since N2 is the limiting reactant (its mole value is less than H2's mole value), we can calculate the amount of NH3 produced based on the mole ratio of N2 and NH3:
moles of NH3 = 2/1 x moles of N2
= 2/1 x 0.999 mol
= 1.998 mol
The theoretical yield of NH3 can be calculated from its mole value:
mass of NH3 = moles of NH3 x molar mass of NH3
= 1.998 mol x 17.031 g/mol
= 34.06 g
Now, we can calculate the percent yield by dividing the actual yield (17.8 g) by the theoretical yield (34.06 g) and multiplying by 100:
percent yield = actual yield / theoretical yield x 100%
= 17.8 g / 34.06 g x 100%
= 52.24%
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How many atoms are in 9.3moles of lithium?
Answer:
3.45 moles Li contains 2.08 × 10 (to the power of)24 atoms .
Explanation:
The relationship between atoms and moles is:
1 mole atoms =
6.022 × 10 (to the power of)23
atoms
In order to determine how many atoms occupy a given number of moles, multiply the given moles by
6.022 × 10 (to the power of)23
atoms/mole
.
In the case of 3.45 moles lithium (Li):
3.45 mol Li × 6.022 × 10 (to the power of)23 atoms Li/ 1 mol Li =
2.08 × 10 (to the power of)24
atoms Li rounded to three
Answer: 3.45 moles Li contains 2.08 × 10 (to the power of)24 atoms
Explanation:
which form of energy does a cheeseburger have
Answer:
chemical potential energy - It mainly has chemical potential energy, this is really a type of electrical potential energy stored in the chemical bonds of the molecules
Explanation:
You can give the other person brainliest, I don't need it! :)
The laser in a 3D printer uses light with a frequency of 3.844 × 1014 Hz. Calculate the wavelength of this light in nm. Show all your calculations. (Hint: Remember the speed of light!)
Answer:
The wavelength of this light is 780.4 nm.
Explanation:
Given that,
The frequency of laser light, [tex]f=3.844 \times 10^{14}\ Hz[/tex]
We need to find the wavelength of this light.
We know that,
[tex]c=f\lambda[/tex]
Where
[tex]\lambda[/tex] is the wavelength of light
So,
[tex]\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{3.844 \times 10^{14}}\\\\=7.804\times 10^{-7}\ m\\\\=780.4\ nm[/tex]
So, the wavelength of this light is 780.4 nm.
Which best describes the difference between Mitosis and Meiosis?
Mitosis occurs in plants; Meiosis occurs in animals.
Mitosis and meiosis are both forms of cell division, but mitosis creates exact replicas and meiosis creates
gametes, or sex cells, for use in sexual reproduction.
Meiosis and mitosis are both forms of genetic modification where genes are replaced with desired DNA.
Meiosis is asexual reproduction; mitosis is sexual reproduction.
Answer:
Cells produced by meiosis are genetically identical, and cells produced by mitosis are genetically unique.
Explanation:
Cells produced by mitosis possess half the genetic material of cells produced by meiosis. Mitosis only occurs in the presence of oxygen, while meiosis can occur in the absence of oxygen.
Pls help with this “can get 16 points!”
Explanation:
I believe mitosis is the answer
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What determines how many electrons an atom will gain, lose, or share when it forms a chemical bond?
Answer:
To be stable an atom will gain, lose, or share electrons to complete the outer most energy level (electron shell). Octet Rule because levels 2 and 3 need 8 electrons to be stable.
Under each DNA sequence write the complimentary mRNA base sequence that each of these gene fragments would produce. Remember that in the production of mRNA, the DNA base sequence "A" _________________ specifies the RNA base ____________________
Answer:
The correct answer would be -
Thymine to adenine
Cytosine to guanine
guanine to cytosine
Adenine, and "U" uracil respectively.
Explanation:
mRNA is a sequence of complementary base sequences encoded from a gene or DNA segment which is used to produce the protein by the process called translation.
From converting a sequence from DNA to its complementary mRNA sequence, the rules of complementary base pairing will be applied: Cytosine (C) is replaced with Guanine (G) – and vice versa. Uracil (U) is replaced by Adenine (A) and Thymine is replaced by adenine.
4. Biotic factors that affect other organisms in an ecosystem include all but which of the following factors? a. Symbiosis b. Predation C. Volcanic eruptions d. Competition
I think its d but im not sure
Answer:
Below
Explanation:
The answer is C, because ecosystems include:
Competition
Predation
Consumption
Parasitism
Disease
Symbiosis
What do all magnets have in common? Select all that apply
magnetic domains are aligned
magnetic domains are not aligned
movement of protons creates a magnetic field
all magnets have opposite poles (a North pole and South pole)
movement of electrons creates a magnetic field
moving electrons generate magnetic fields
Answer:
1
4
5
6
Explanation:
all magnets have opposite poles (north and south)
magnetic domains are aligned
moving electrons generate a magnetic filed
movement of electrons creates a magnets field
attracted to iron, nickel and cobalt
Metals in group 2 of the periodic table form ionic bonds in a one-to-one ratio with nonmetals in group ______.
15
15
16
16
17
17
18
18
Answer:
7
Explanation:
Bec g1 has to lose one electron and g7 has to gain one electron
(Hurry ASAP!!!) There are 1.5 moles of methane (CH4) in a tank. It has a pressure of 4.4 atm at 173°C. Find the volume occupied by the gas.
Answer:
hope this help !
Explanation:
Use the given functions to set up and simplify 173 ° C .
1.5 =
CH4 = CH4
4.4 = CH4
173 ° C = CH4
Concentrated hydrochloric acid is 12.0 M. What volume of this concentrated
solution would be needed to mix with water to produce 100. mL of 5.0 M. (Hint: the
number of moles in the diluted solution must be the same as the number of moles
from the concentrated solution.)
Answer:
41.67 ml HCl
Explanation:
n = M x V
Since the number of moles is the same:
M1 x V1 = M2 x V2
V1 = M2 x V2 /M1 =(0.1 L x 5.0 M) / 12.0 M = 0.041667 L = 41.67 ml
All organisms on Earth have the information necessary for building them coded in their genes, and each gene is a part of the organism's unique DNA molecule.
INNIN
However, some organisms get all of their genetic material from just one parent organism. When this happens, this is called
reproduction
A. singular
B. infertile
C. asexual
D. sexual
Answer:
C
Explanation:
how many moles of NaCl are needed to make 5.25 L of a 0.25 M solution
Answer:
m = 21.915 g of NaC to create the right balance between
The number of moles of NaCl is 1.31 moles. This can be calculated by using the molarity formula i.e. M=n/V.
Molarity:
Molarity is defined as the ratio of the number of moles of solute to the Volume of solution in liters.
It is given by:
M = n/V
What information do we have?
Volume = 5.25 L
Molarity = 0.25 M
To find:
Moles=?
On substituting the values:
M=n/V
0.25 M =n/ 5.25 L
n= 0.25M*5.25 L
n=1.31 moles
Thus, the number of moles of NaCl are 1.31 moles.
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The concentration of lead ion in a water sample is 5ppb. Calculate the amount of lead ion in 2000g of this water sample?
Answer:
10 μg or 1 x 10⁻⁵ g
Explanation:
The concentration of lead ion is given in parts by billion (ppb), which means that there are 5 micrograms (μg) of lead in 1 liter of water sample:
5 ppb = 5 μg lead ion/L
If we assume that the density of the water sample is equal to 1 g/ml (density of water at 25°C), we can say that 2000 g of sample is equal to 2000 mL:
sample volume = 2000 g x 1 mL/g = 2000 mL x 1 L/1000 mL = 2 L
Thus, the amount of lead ion in 2000 g (or 2 L) of water sample is:
mass of lead ion = 5 μg lead/L x 2 L = 10 μg x 1 g/10⁶μg = 1 x 10⁻⁵ g
What is the molar mass of AuCl₃?
Answer:
molar mass of Aucl3
is 303.33 g/ mol
What are most semiconductors made from? iron copper aluminum silicon
Answer:
silicon
Explanation:
Silicon is at a higher level than germanium, tin, and lead.
Most semiconductors are made up of silicon. Thus, the correct option for this question is D.
What are semiconductors?A Semiconductor may be defined as a type of solid substance that possesses an electrical conductivity between that of an insulator and a conductor. It has a specific electrical property that allows it to function as a foundation for computers and other electronic devices.
Silicon is the most widely utilized in the manufacturing of semiconductors. Apart from this, germanium, gallium, and arsenide are also used. Among all these elements, germanium was one of the earliest semiconductors material used.
Semiconductors are widely used in the production of Integrated circuits (ICs) and electronic discrete components such as diodes and transistors.
Therefore, most semiconductors are made up of silicon. Thus, the correct option for this question is D.
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An inflated balloon is left outside overnight. initially it has a volume of 1.84 L when the temperature is 293.4 K and the pressure. what temperature will the balloon have a volume of 1540mL. If the pressure falls to 14.41 psi?
Answer:
ffff
Explanation:
Which one has a larger atomic radius cobalt or nickel
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, cobalt has larger atomic radius than nickel.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
On going down the group of periodic table size increases due to increase in number of shells, on going from left to right in a period the size decreases because of increase in effective nuclear charge. Cobalt or nickel comes in the same period, cobalt comes first to nickel. Cobalt has larger atomic radius than nickel. Ni and Co belongs to d block.
Therefore, cobalt has larger atomic radius than nickel.
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If there is no subscript on an element symbol there is/are __________________ atom(s) of that element.
Answer:
If there is no subscript written after a symbol that means there is one atom of that element present
Explanation:
correct me if I'm
If there is no subscript on an element's chemical symbol there is one atom of that element.
What is an element ?
It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.Elements combine to form compounds.
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What distinguishes an element from all other elements
Answer:
Elements are distinguished from one another by their atomic numbers. No two elements have the same atomic number. It is the atomic number, and therefore the number of protons in its atomic nuclei, that define an element.
Hi please may someone help me
How does an adaptation begin?
In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment.
Answer:
adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment. .
Explanation:
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