Answer:
Chemical bonding - a mutual adhesion of atoms in an molecule and the crystal lattice.
Explanation:
Answer:
A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds.
What are the 8 steps of the water cycle in order
AgNO3 (aq) +
Cu(s) —
Cu(NO3)2 (aq) +
| Ag(s)
What is the integer?
Answer:
2
Explanation:
2AgNO3 + Cu -----> Cu(NO3)2. + 2Ag
The molar mass of H2O is 18.02 g/mol. How many moles of H20 are
present in 2.15 x 10^24 molecules?
Answer:
3.57moles
Explanation:
The number of moles in a compound can be got from the number of molecules it contains.
Since;
number of moles (n) = number of molecules (nA) ÷ Avagadro's number
Avagadro's number = 6.02 × 10^23 molecules
H20 contains 2.15 x 10^24 molecules, according to this question. Therefore,
n = 2.15 x 10^24 ÷ 6.02 × 10^23
n = 0.357 × 10^(24-23)
n = 0.357 × 10^1
n = 3.57moles
Hence, 3.57moles are present in in 2.15 x 10^24 molecules of H2O.
What provides the energy to set the water cycle in motion?
Nothing, the water cycle does not need energy.
Clouds
Sun
Water.
Se ard 25g de magneziu de puritate 90%. Ce volum de oxigen se consumă și câti moli dioxid de magneziu se formează
Answer:
10.5 dm3 O2
0.94 moles de MgO
Explanation:
La pregunta dice explícitamente que el magnesio es puro en un 90%.
Por lo tanto, masa de magnesio puro = 90/100 * 25G = 22,5 g
Número de moles de Mg = 22,5g / 24g/mol = 0,94 moles de Mg
La ecuación de reacción es;
2Mg (s) + O2 (g) ------> 2MgO (s)
Si 2 moles de Mg reaccionan con 1 moles de O2
0.94 moles de Mg reacciona con 0.94 * 1/2 = 0.47 moles de O2
Si 1 mol de O2 ocupa 22,4 dm3
0.47 moles de O2 ocupan 0.47 * 22.4 / 1 = 10.5 dm3
También;
2 moles de Mg producen 2 moles de MgO
Entonces, 0.94 moles de Mg producen 0.94 moles de MgO
Give the boiling point elevation for the following: 150 grams of H2SO4 dissolved in 2.5 kg of H2O (i=2)
Answer: b
Explanation:
Which is the correct symbol for the following atom?
(I NEED THE ANSWER ASAP)
Answer:
c
Explanation:
What is the electron configuration for nickel (Ni)?
The Periodic Table
A. 1522s22p63523p640408
O B. 1s22s22p63s23p64dB
C. 1922s22p63s23p3 dB
O D. 1922s22p63523p63.10
HELP!!
Please help due today!
for the first one it is B OR THE SECOND OPTION
6.93x10^-10 g in picograms
Thanks, I’ll mark the brainliest
Answer:
693 picograms
Explanation:
Please I need this help me
Answer:
first of all is that really chemistry
What is a mixture called which dosent allow light to transmition
??
Answer:
All three are examples of colloids. Suspensions may scatter light, but if the number of suspended particles is sufficiently large, the suspension may simply be opaque and the light scattering will not occur.
I need the answers to these quick!!
I haven't taken biology in a few years, so I may be wrong, but to me it looks like mitosis, since it only divides once, and if I can see the picture correctly it looks like each cell contains the same amount of chromosomes, but I can't see the picture very well. If it helps here are some differences between meiosis and mitosis:
1. Cell Division
Mitosis: A somatic cell divides once. Cytokinesis (the division of the cytoplasm) occurs at the end of telophase.
Meiosis: A reproductive cell divides twice. Cytokinesis happens at the end of telophase I and telophase II.
2. Daughter Cell Number
Mitosis: Two daughter cells are produced. Each cell is diploid containing the same number of chromosomes.
Meiosis: Four daughter cells are produced. Each cell is haploid containing one-half the number of chromosomes as the original cell.
3. Genetic Composition
Mitosis: The resulting daughter cells in mitosis are genetic clones (they are genetically identical). No recombination or crossing over occur.
Meiosis: The resulting daughter cells contain different combinations of genes. Genetic recombination occurs as a result of the random segregation of homologous chromosomes into different cells and by the process of crossing over (transfer of genes between homologous chromosomes).
4. Length of Prophase
Mitosis: During the first mitotic stage, known as prophase, chromatin condenses into discrete chromosomes, the nuclear envelope breaks down, and spindle fibers form at opposite poles of the cell. A cell spends less time in prophase of mitosis than a cell in prophase I of meiosis.
Meiosis: Prophase I consists of five stages and lasts longer than prophase of mitosis. The five stages of meiotic prophase I are leptotene, zygotene, pachytene, diplotene, and diakinesis. These five stages do not occur in mitosis. Genetic recombination and crossing over take place during prophase I.
5. Tetrad Formation
Mitosis: Tetrad formation does not occur.
Meiosis: In prophase I, pairs of homologous chromosomes line up closely together forming what is called a tetrad. A tetrad consists of four chromatids (two sets of sister chromatids).
6. Chromosome Alignment in Metaphase
Mitosis: Sister chromatids (duplicated chromosome comprised of two identical chromosomes connected at the centromere region) align at the metaphase plate (a plane that is equally distant from the two cell poles).
Meiosis: Tetrads (homologous chromosome pairs) align at the metaphase plate in metaphase I.
7. Chromosome Separation
Mitosis: During anaphase, sister chromatids separate and begin migrating centromere first toward opposite poles of the cell. A separated sister chromatid becomes known as daughter chromosome and is considered a full chromosome.
Meiosis: Homologous chromosomes migrate toward opposite poles of the cell during anaphase I. Sister chromatids do not separate in anaphase I.
I can add the similarities between them if you need. This work is not mine, I got it from thoughtCo.
Good luck :)
_ _ _+Cl₂ ➡️ MgCl₂ Complete given Reaction
Answer:
MgExplanation:
Mg + Cl2 ----> MgCl2
plz follow me
Help me please What makes water filters better
Answer:
well according to salesman they take out all and out all bacteria that is in the water that the water filters installed in the systems already don't take out so in other wordsthere and the water filter takes that out
How many moles of hydrogen gas will form if 0.35 moles of Na reacts with an excess of water?
Answer:
Write the balanced reaction equation. From this, note the mole ratio of Na to H₂; this enables you to know the number of moles of H₂ produced.
This technique is in your lecture notes and/or your chemistry textbook, so you should not have to ask Quorans to do your homework. (Take the hint.)
Explanation:
You have 2000 g of radioactive substance with a half-life of 100 years four half-lives go by how many grams do you have the radioactive substance do you have left
Answer:
after 4 half-lives, 125g is left
Explanation:
The half-life of a radioactive substance is the time it takes for the substance to decay by half its original mass.
In this example, we are asked to find the remaining mass after four half-lives.
What we will simply do is to reduce the starting mass by half, after each half-life decay. this is done as follows:
1st half-life decay: starting mass 2000g
final mass = 2000g ÷ 2 = 1000g
2nd half-life decay: starting mass = 1000g
final mass = 1000 ÷ 2 = 500
3rd half-life decay: starting mass = 500
final mass = 500 ÷ 2 = 250g
4th half-life decay: starting mass = 250g
final mass = 250 ÷ 2 = 125g
∴ after 4 half lives, 125g is left
A tank for storing liquid as a base of area 1.5 meters square. What is the pressure on the base of the tank when it contains water weighting 4500n
Answer:
3000 Nm^2
Explanation:
We must remember that pressure is defined as force per unit area.
We have been given the following information in the question;
Area of the tank= 1.5 m^2
Weight of water in the tank = 4500N
And;
P = F/A
F= force
A = area
P = 4500 N/1.5m^2
P= 3000 Nm^2
What is the name for Ga(NO3)2
Answer:
Gallium Nitrate
Explanation:
Identify the type of reaction and the products. MgF2+KNO3 ->
Answer:
double replacement MgN2O6 + KF
Explanation:
A protein is a polymer that is made of
Answer:
A protein is a polymer that is made of amino acids.
The formula of methane is CH4. The symbols for the two elements in methane are C and H. Give the names of these two elements.
Answer:
Carbon and Hydrogen
Explanation:
So the C stands for Carbon and H is for Hydrogen. Methane (CH4) is made up of one atom of Carbon and 4 atoms of Hydrogen.
Hope this helps
What is the relationship between atoms and mass?
Answer:
Explanation:
A property closely related to an atom's mass number is its atomic mass. The atomic mass of a single atom is simply its total mass and is typically expressed in atomic mass units or amu.
how many lone pairs in TeO2
Answer:
0 lone pairs
Explanation:
A Punnett square without the genotypes of the parents is shown below.
?
?
?
СС
Сс
?
CC
Сс
What are the genotypes of the parents?
Answer:
Genotype of parents is CC and Cc
Explanation:
Please see the attachment
Some one help pls on number 2 don’t mind the tv
Answer:
No, I believe it's not balanced, srry if I got it wrong for you
Avogadro's number 6.02 X 10^23 is used in chemistry to measure something like electrons, atoms, elements etc. Question 1 options:
True
False
Answer:
I'm pretty sure it's false. It is used to measure the amount of Moles in an element.
I'm sorry if this is incorrect.
The Avogadro number is the number of atoms in one mole of a substance. Hence, it can be used to determine the number of atoms, electrons or molecules. Thus, the statement is true.
What is Avogadro number ?Any substance containing 6.02 × 10²³ atoms is called one mole of the substance. This number is called Avogadro number. The name came from the scientist Avogadro.
This number measures the number of atoms in specific moles of an element or compound. One mole of a compound contains Avogadro number of molecules.
The mass of an element containing Avogadro number of atoms is called its atomic mass. Similarly, the mass of a compound that contains Avogadro number of molecules, that is one mole of the compound is called its molar mass.
Hence, we can calculate the number of atoms in a given number of moles of an element or compound by knowing that one mole of it contains Avogadro number of atoms.
Find more on Avogadro number:
https://brainly.com/question/28834341
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Which organism in the food chain is
responsible for transforming radiant
energy into chemical energy?
Grass->Prairie Dog -> Coyote -> Soil Bacteria
Answer:
The organism in the food chain responsible for transforming radiant energy into chemical energy is;
Grass
Explanation:
Radiant energy is the energy present in electromagnetic waves which carry photons that may be considered as energy packets. It is an energy present in the Sunlight, which is an electromagnetic waves, and it is the energy in the electromagnetic waves that plants convert to chemical energy for food in the process known as photosynthesis as follows;
6CO₂ + H₂O + Radiant energy → C₆H₁₂O₆ + 6O₂
Therefore the organism in the food chain responsible for transforming radiant energy into chemical energy is the plant, grass
calculate the amount of water of crystalization in 10 g of Na2co3 .10 H2o
Answer:
the mass percentage of water of crystallization in washing soda is 62.9 %.
Explanation:
Which of the following explains this observation?
A. Sound has longer wavelengths than light
B. Light has a greater mass than sound
C. Light travels faster than sound
D. Sound and light travel at the same speed