Answer:
At 100 °C (the boiling point of water at standard atmospheric pressure), water molecules in the liquid state have a density of 0.9584 g/cm3. This means that there are 3.21 × 1022 water molecules packed into 1 cm3 and the average distance between water molecules is 3.91 × 10-8 cm.
This is what I found. Hope it helps!
is this statement true or false? the chinese knew how to produce silk by about 2700 b.c.
Answer:
its true
Explanation:
I took the test
3. Connect the electron configuration of Columns 6 (Oxygen) and 7 (Fluorine) with the
tendency to gain or lose valence electrons easily and the strength of the tendency for
electronegativity.
Answer:
I DON'T KNOW
Explanation:
I DON'T KNOW
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5. Which of the following statements illustrates osmosis?
Answer:
there is no following so sorry
with increasing altitude, air density also increases... true or false
Answer:
false
Explanation:
Someone pls help me
Answer:
A. 4 cm, 40 mm
B. 5.5 cm, 50 mm
C. 8.8cm, 80 mm
D. 8.2 cm, 82 mm
E. 9.5cm, 95 mm
Explanation:
NB: 1 cm = 10 mm
Two scientists are investigating the properties of water. In one experiment, they notice that water breaks down to hydrogen and oxygen gas during a chemical reaction. Which of the following does this experiment demonstrate
A. it demonstrates that a water molecule consists of two hydrogen atoms and one oxygen atom.
B. it demonstrates that water consists of atoms
C. it demonstrates that water is a compound
D. it demonstrates that water is an element
Answer:
A
Explanation:
Just need to make sure if this is right
Answer:
yeah think that’s correct
Explanation:
not exactly sure how to explain this, I just know that it’ll prolly just stay the same and not move to any high and low regions of the cell
The equation c = 2.95 g show how much it costs to buy gas at a gas station on a certain day. n the equation c represents the cost in dollars and g represents how many gallons of gas were purchased.
Write down at least four (gallons of gas cost) pairs that fit this relationship.
Explain why, at room temperature, CO2 is a gas and CS2 is a liquid. You may use diagrams as part of your explanation.
Explanation:
A. Hydrogen bonding is present in CS2 but not in CO2.
B. CS2 has greater dipole moment than CO2 and thus the dipole-dipole forces in CS2 are stronger.
C. CS2 partly dissociates to form ions and CO2 does not. Therefore, ion-dipole interactions are present in CS2 but not in CO2.
D. The dispersion forces are greater in CS2 than in CO2.
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What is the most common ion charge of chromium? Where on the periodic table?
Answer:
i
Explanation:
The most common oxidation states of chromium are +6, +3, and +2. On the metal area of the periodic table.
Explanation:
A HOMOGENEOUS LIQUID THAT CANNOT BE SEPARATED INTO ITS COMPONENTS BY DISTILLATION BUT CAN BE DECOMPOSED BY ELECTROLYSIS IS CLASSIFIED AS A/AN _______________.
ELEMENT
SUBSTANCE
COMPOUND
SOLUTION
Answer:
ELEMENTS
Explanation:
CUZ AN A
ELEMENT IS A GROUP OF ATOMS THAT CANNOT BE BROKEN DOWN BY ANY CHEMICAL OR PHYSICAL MEAN
Can someone please tell me the answer on this. First person to answer will most definitely be marked brainliest so please just tell me the answer. The deadline is in 5 MINUTES!!
particles, high, low, oxygen, waste, carbondioxide, fast.
convert 230.000 000 000 mi into scientific notation
Answer:2.3×10^11
Explanation:since scientific notation is as a×10^k with 0<a<=9
Convert 3,124,991 centimeters (cm) to miles (mi) rounding to 4 sig figs
Answer:
19.417794 mi
Explanation:
Answer:
19.41
Explanation:
how can you tell the number covalent bonds the atoms of an element can form?
what is the name of the ionic compound made of beryllium and chlorine?
Answer:
beryllium chloride
Explanation:
Therefore a compound made from beryllium and chlorine will be named beryllium chloride.
Pls helpppp me if you cannn
Answer:
Solution A : calcium hydroxide
Solid B : calcium oxide
Gas C : Hydrogen gas
Explanation:
i) When metals react with water they form hydroxides thus calcium hydroxide
ii) When metals eact with oxygen they form oxides.
iii) Wehn metals react with hydrochloric acid they form a salt and a gas hydrogen.
HOPE THIS HELPED
Who is the Father of the Periodic Table?
Answer:
Dmitri Ivanovich Mendeleev
Explanation:
Answer:
Dmitri Mendeleev
Explanation:
5. Element X has two isotopes: X-100 and X-104. If the atomic mass of X is 101
amu, what is the relative abundance of each isotope in nature?
Answer:
The abundance of X-100 is 75 percent, and X-104 has an abundance of 25 percent. The answers are found by solving two equations with two unknowns, which are A plus B equals 100, and 100A plus 104B equals 10,100.
The relative abundance of each isotope in nature
X-100 = 75%
X-104=25%
By dividing the total number of ions identified by the number of ions with a particular m/z m/z m/z ratio, one may determine the relative abundance for each individual ion in the sample.
How can the abundance of two isotopes be determined?
For chemistry problems involving relative abundance, use the following formula:
(M1)(x) + (M2)(1-x) = M (E)
Find the relative abundance of the isotopes if one nitrogen isotope, nitrogen-14, has a mass of 14.003 amu and another, nitrogen-15, has a mass of 15.000 amu.
Algebra can be used to find x. ...
x = 0.996
To learn more about relative abundance refer to:
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How do you determine how many molecules are in a chemical equation
Answer:
Determine the mass of substance and it's molar mass. Divide the given mass by it's molar mass to get moles and multiply time
6.002*1023 molecules 1mole
The opposite of an endothermic reaction is a(n) reaction.
Answer:
The opposite of an endothermic process is an exothermic process, one that releases or "gives out" energy, usually in the form of heat and sometimes as electrical energy.
Explanation:
Hope this helps you. Have a nice day. Please mark as brainliest. It helps a lot. ^_^
I need help with this , here are the words ( black,radiation, time, holes and universe
how to tell how many valence electrons an atom has?
Answer: Count only the electrons in the highest shell s and p orbitals when determining valence.
Explanation: I'm glad you asked this question. It is often not well explained. The term valence electrons is assigned to only the electrons in an element's highest energy level. These reside only in the s and p orbitals, and not the d or f, as I'll explain later. The s orbital can hold 2 electrons and the p can hold 6. Potassium, K, has an s orbital in its highest energy shell, 4. It contains only 1 electron, so it has a valency of 1.
Calcium, Ca, has 2 in its highest energy level: 4s^2, so it has a valency of 2. Moving to the right, the element scandium, Sc, add another electron, but it goes into the 3d orbital. 3d is in the 3rd energy shell, so it is not counted as a valence electron. Only after we move further right, to gallium, Ga, do we start adding electrons to the 4th energy level again - the 4p orbitals can accept up to 6 electrons. Ga has 3 valence electrons - 2 in the 4s and 1 in the 4p. Oxygen has 2 in the 2s and 4 in the 4p orbitals, for a total of 6. It is close to having a comple outer shell (2 in the 2s and 6 in the 2p). Just 2 more electrons would fill both the 2s and 2p orbitals for a total of 8 valence electrons, a stable configuration (the same configuration as thje stable gas Neon).
Please tel me the answer I will mark you brainliest
2 is the answer
Explanation:
the other answers are all included in the cell theory
what is exactly equal to the total number of protons and neutrons in an atom?
Answer:
That would be the mass.
what is the relationship between gas particles and pressure
Answer:
For a fixed mass of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. Or Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship. If volume increases, then pressure decreases and vice versa, when the temperature is held constant..
Explanation:
Hope it helps you..
Y-your welcome in advance..
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If a cell has 4 chromosomes at the beginning of meiosis, how many chromosomes will be in each cell at the end of meiosis?
Answer:2. Mitosis would produce identical daughter cells with the same number as the parent cell. Meiosis would product sex cells with one-half the amount of genetic material as the parent cells.
Explanation:
If a cell has 4 chromosomes at the beginning of meiosis then the daughter cell will have TWO chromosomes at the end of meiosis.
Meiosis is a type of reductional cell division by which a parental cell duplicates its genetic material (DNA) and then divides twice to produce four (4) daughter cells having half of the genetic material.These successive cell division cycles are known as Meiosis I and Meiosis II.Meiosis is a sexual mode of reproduction that produces gametes or geminal cells, which fuse during the process of fertilization to form a zygote.
In conclusion, if a cell has 4 chromosomes at the beginning of meiosis then the daughter cell will have TWO chromosomes at the end of meiosis.
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Fossil fuels—such as coal, oil, and natural gas—come from ancient, and long dead, plant and animal matter. These fuels have been generated through millions of years of the Earth's geologic processes. Most fossil fuel reserves are found underground, relatively close to the Earth's surface.
At the current rate that human civilization is burning fossil fuels for energy, the Earth's geologic processes have no chance of keeping pace. This means that fossil fuels are a _______ energy resource.
A.
synthetic
B.
nonrenewable
C.
plentiful
D.
renewable
Answer:
Nonrenewable
Explanation:
There is a finite supply of fossil fuels
7.
Which of the following gases is an important greenhouse gas?
a. Hydrogen
b. Nitrogen
C. Carbon dioxide
d. Oxygen
Answer:
C
Explanation:
I guess
Answer:
c. carbon dioxide
Explanation:
its the highest percentage of gas produced compared to hydrogen, nitrogen and oxygen.
what is physical change
Answer:
changes that dont result in the formation of new substance with new properties.