A mixture of water and non-dissolved materials is called a heterogeneous mixture.
A heterogeneous mixture is a mixture that contains two or more substances that are not uniformly distributed throughout the mixture.
In a mixture of water and non-dissolved materials, the non-dissolved materials are not uniformly distributed throughout the water. Instead, they will settle to the bottom of the container over time.
Therefore, heterogeneous mixture is a mixture of water and non-dissolved materials.
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When drawing a Bohr model for Sulfur, how many energy levels will you
draw?
5
4
3
2.
Answer:
3
Explanation:
2,8,6
Which of the following are in the human brain?
A. Hypothalamus
B. Pituitary gland.
C. Pineal gland
D. All of them
helllppp pls
Explain how human body maintains normal body temperatur
A student knows that hydrogen (H) atoms and oxygen (O) atoms combine to form water (H2O). The student correctly predicts that hydrogen (H) and sulfur (S) will combine to form hydrogen sulfide (H2S) On what is this prediction most likely based?
A. Oxygen and sulfur are in the same family with the same number of valence electrons.
B. Oxygen and sulfur are in the same period or row with the same number of neutrons
C. Oxygen and sulfur are in the same period or row with the same number of protons
D. Oxygen and sulfur are in the same family with the same number of energy levels.
Answer:
A
Explanation:
They both need to lose 2 electrons to form ions
Oxygen and sulphur are in the same family with the same number of valence electrons.
What is meant by valence electron?The electrons in an atom's outermost shell, or energy level, are called valence electrons.
Compared to oxygen, sulphur has more electron shells. This is because sulphur has three electron shells because it is in period 3 of the periodic table, whereas oxygen is in period 2 and has two electron shells.
Since there is just one link between these oxygen atoms, they will each have six valence electrons and a shared valence electron with sulphur.
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What is the density of nitrogen gas at 356.4 K?
Answer:
Nitrogen gas (chemical symbol N) is generally inert, nonmetallic, colorless, odorless and tasteless. Its atomic number is 7, and it has an atomic weight of 14.0067. Nitrogen has a density of 1.251 grams/liter at 0 C and a specific gravity of 0.96737, making it slightly lighter than air.
Explanation:
:)
what fraction of 2 years is 10 months
Answer:
10/24
Simplified: 5/12
Explanation:
Well first, let's convert years into months
1 year = 12 months which means 2 years = 24 months
In fraction form we would write this as 10/24
If the question asks for it to be simplified, then simply
Both 10 and 24 evenly fit 2
Therefore, divide both the numerator and the denominator by 2
10 ÷ 2 / 24 ÷ 2
5/12
This can no longer be simplified
1. What is the frequency of the following:
a. radio waves with wavelength 50 m?
b. gamma-ray with a wavelength of 45 m?
2.What is the wavelength of the following?
a. infrared light with frequency of 3 .5x 10° Hz?
b. ultraviolet light with frequency of 4.0x 10 * Hz
Answer:
its soooooo ezy
Explanation:
82828I 87is 818373773622771829383746171948468328933737373737378364737272828374736367181i3i46738100104848070792761527484930201834728the 8585949476425675666
Guys i need help because its due today.
Answer:
204.6 K
Explanation:
PV = nRT
5.6 (12) = 4 (.0821)T
67.2 = .3284T
204.6 = T
At room temperature, CsF is expected to be:______.
a. a soft solid.
b. a conducting solid.
c. a gas.
d. a brittle solid.
e. a liquid.
Answer:
d. a brittle solid.
Explanation:
Hello!
In this case, since cesium fluoride is widely known as an ionic compound due to the large electronegativity difference, it is possible to discard a. due to its crystalline structure, b. because conducting solids are metals, c. because ionic compounds are not likely to be gases and e. because even when it is soluble in water, the problem is not referring to an aqueous solution; therefore, the answer is d. a brittle solid.
Best regards!
Which of the following statements about steroid hormones is true?
A. They bind with receptor proteins in the plasma membrane.
B. They bind to carrier proteins in order to be transported in the blood to
their target cells.
C. They are synthesized from epinephrine in the adrenal gland.
D. They are mostly derivatives of the amino acid tyrosine.
Answer:
B. They bind to carrier proteins in order to be transported in the blood to
their target cells.
Explanation:
Steroid hormones are belongs to the class of chemical compound called steroid. Steroid hormones are majorly secreted by three glands - ovaries, testes and adrenal cortex.
Steroid hormones are released in the blood and are allowed to bind to the specific carrier proteins such as corticosteroid-binding globulin and albumin which helps them to carry to the target cells for the functioning.
The steroid hormone binds to receptor proteins in the target cell and not in the plasma membrane
Hence, the correct answer is "B. They bind to carrier proteins in order to be transported in the blood to their target cells."
What are the four types of human pathogens that
can cause infectious disease?
Answer:
Viruses, bacteria, fungi, and parasites.
Explanation:
hope this helps and is right :)
The specific gravity of crude oil is 0.876. If 1.00 liter of water weighs 1.00 kilograms, what is the weight of a liter of crude oil ( show work)
0.876 kg or 1.14kg
I need to know this too. Hopefully someone answers quick lol
The specific gravity of crude oil is 0.876 as 1.00 liter of water weighs 1.00 kilograms. Then weight of crude oil is 0.876 kg.
What is specific gravity?A specific gravity is a dimensionless quantity and it is defined as the ratio of density of substance to the density of water.
It is used to determine where the object will float on the surface of liquid approximately.
As, density = mass / volume
Volume of water is 1 ml given.
So, density of substance = mass of substance
Specific gravity = density of substance / density of water
So, Specific gravity = mass of substance / density of water
Mass of substance = specific gravity x density of water
= 0.876 x 1.00 kg = 0.876 kg
Thus, the specific gravity of crude oil is 0.876 as 1.00 liter of water weighs 1.00 kilograms. Then weight of crude oil is 0.876 kg.
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How many grams are in 3.1 moles of H2SO4?
Answer:
98.07848 grams.
Explanation:
A substance that cannot be broken down into another substance by chemical or physical means is called a
Answer:
A substance that cannot be broken down into another substance by chemical or physical means is called an Element
4. Calculate the molarity of a solution made by dissolving 23.0 g NaCl in enough water to make 0.040 L
of solution?
Answer:
The molarity (M) of a solution is the number of moles of solute dissolved in one liter of solution. To calculate the molarity of a solution, you divide the moles of solute by the volume of the solution expressed in liters.
Explanation:
A 1.00 L of a solution is prepared by dissolving 125.6 g of NaF in it. What would be the molarity of this solution?
Answer:
2.99 M
Explanation:
In order to solve this problem we need to keep in mind the definition of molarity:
Molarity = moles of solute / liters of solutionIn order to calculate the moles of solute, we convert 125.6 g of NaF into moles using its molar mass:
125.6 g NaF ÷ 42 g/mol = 2.99 mol NaFAs the volume is already given, we can proceed to calculate the molarity:
Molarity = 2.99 mol / 1.00 L = 2.99 Mwrite down four fuctions of water learned in life sciences class
Answer:
See explanation
Explanation:
Water is a polar solvent and is also called a universal solvent because of its ability to dissolve several substances especially in the body.
The functions of water learned in the life sciences class include;
1. Water is the medium for biochemical reactions
2. Most substances in the body are transported from place to place by water.
3. Water acts a solvent for many biologically important substances in the body.
4. Water is necessary in helping animals to regulate their body temperature.
3. If you have 2.6 moles of NaI and 3.9 moles of bromine, how many grams of NaBr can be made from this reaction?
Br2 + NaI → NaBr + I2
Answer:
0
Explanation:
What is soap? (This is for an assignment called "Chemistry of Soap").
Answer:
Soap is a mixture of sodium salts of various naturally occurring fatty acids. ... Soap is produced by a saponification or basic hydrolysis reaction of a fat or oil. Currently, sodium carbonate or sodium hydroxide is used to neutralize the fatty acid and convert it to the salt.
Explanation:
I hope this helps! ^^
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Answer:
Soap is a salt of a fatty acid used in a variety of cleansing and lubricating products. In a domestic setting, soaps are surfactants usually used for washing, bathing, and other types of housekeeping. In industrial settings, soaps are used as thickeners, components of some lubricants, and precursors to catalysts
Calculate the percent dissociation of butanoic acid (C3H2CO2H) in a 1.4 mM aqueous solution of the stuff.
Answer: The percent dissociation of butanoic acid is 9.8%
Explanation:
[tex]C_3H_2CO_2H\rightarrow H^+C_3H_2CO_2^-[/tex]
cM 0 0
[tex]c-c\alpha[/tex] [tex]c\alpha[/tex] [tex]c\alpha[/tex]
So dissociation constant will be:
[tex]K_a=\frac{(c\alpha)^{2}}{c-c\alpha}[/tex]
Give c= 1.4 mM = [tex]1.4\times 10^{-3}[/tex] and [tex]\alpha[/tex] = dissociation constant
[tex]K_a=1.5\times 10^{-5}[/tex]
Putting in the values we get:
[tex]1.5\times 10^{-5}=\frac{(1.4\times 10^{-3}\times \alpha)^2}{(1.4\times 10^{-3}-1.4\times 10^{-3}\times \alpha)}[/tex]
[tex](\alpha)=0.098=9.8\%[/tex]
Thus percent dissociation of butanoic acid is 9.8%
What is the main FUNCTION of the digestive system?
What are some of the main organs of the digestive system?
How are scientific evidence and scientific conclusions related?
A.
Scientific evidence is based on scientific conclusions.
B.
Scientific conclusions are based on scientific evidence.
C.
Scientific conclusions must be made before examining scientific evidence.
D.
Scientific evidence and scientific conclusions are the same thing.
Answer: b
Explanation:
Answer:
B.
Scientific conclusions are based on scientific evidence.
Explanation:
The scientific method in steps:
1- Question
2- Research
3- Hypothesis
4- Experiment
5- Observe
6- Make a conclusion
7- Present you findings
Can you think of an example where hydrogen and oxygen combine and release energy with little or no release of heat energy?
When hydrogen and oxygen combine, they form water or hydrogen peroxide, and energy is released in the process.
What are oxygen and hydrogen?
Oxygen and hydrogen are the chemical elements of the periodic table, and they both are gas. Oxygen is the most important gas, which is needed for breathing. It is present at 21% in the atmosphere.
Hydrogen is another gas present in nature. It is the lightest gas, and it has diatomic molecules. It remains gas at normal pressure and temperature, but it becomes liquid at low temperature.
The oxygen and hydrogen readily react and for water, and hydrogen peroxide, the process of reaction of hydrogen and oxygen releases an amount of energy.
Hence, Energy is released during the creation of water or hydrogen peroxide when hydrogen and oxygen mix.
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How many molecules are in 228.7 grams of KBr?
Answer:
the answer is 119.0023 grams
What volume of sulfur dioxide, SO2 (at STP), is
produced by the burning of 0.250 mole of sulfur?
S(s) + O2(g) → SO2(g)
Answer:
5.6 L is the final volume for SO₂ at STP condtions
Explanation:
The reaction is: S(s) + O₂ (g) → SO₂ (g)
Ratio for this reaction is 1:1, if we see stoichiometry.
1 mol of sulfur can react to 1 mol of oxygen in orden to produce 1 mol of sulfur dioxide.
Then, 0.250 moles of sulfur can produce 0.250 moles of SO₂.
If we solve this by a rule of three, we can say:
At STP 1 mol occupies 22.4L
Then, 0.250 moles will be contained at (0.250 mol . 22.4L) /1mol = 5.6 L
If we apply the Ideal Gases Law:
P . V = n . R . T
1 atm . V = 0.250 mol . 0.082 . 273K
V = (0.250 mol . 0.082 . 273K) / 1atm → 5.6 L
Answerroweo'gfnagnas;gns;BGr;kv
Explanation:
What is the surface composition of planets in the solar system?
A,. Helium or hydrogen
B,. Rock or gas
C., Rock or water
D,. Water or helium
Answer:
A: Helium or Hydrogen
Explanation:
Terrestrial planets are the 4 inner most planets of the solar system which are mercury, venus, earth, Mars, while the giant planets are the 4 outer most which are Jupiter, Saturn, Uranus and Neptune.
Now, these outer most ones are the surface ones and are surrounded primarily by layers of hydrogen and helium gases.
A chemist determined by measurements that 0.060 moles of silver participated in a chemical reaction. Calculate the mass of silver that participated in the chemical reaction.
Be sure your answer has the correct number of significant digits.
Answer:
its your first question like imagine your literally so free so dog water like you have no earnings i am first place in fncs you was 6 th where were you your boxed like a fish eat this pump.
Explanation:
Please solve this i will mark brainlist
Put the following elements in order of increasing atomic number:
1. Strontium
2. Fluorine
3. Terbium
4. Zirconium
5. Iodine
6. Europium
7. Gallium
8. Aluminum
Answer:
Here is the answer ⬆️⬆️⬆️⬆️⬆️⬆️⬆️
The order of the given elements in increasing atomic number is given as F (9), Al (13), Ga (31), Sr (38), Zr (40), I(53) and Terbium (65).
What is atomic number?The atomic number of an element in periodic table is the number of electrons in its neutral atom. Elements are arranged in periodic table in an increasing order of atomic number from left to right.
An atom is composed of electrons, protons and neutrons. Protons are positively charged and electrons are negatively charged particles and they are equal in an atom. Thus, the total negative charge is neutralised by the negative charges.
The order for the given elements in periodic table in an increasing atomic number is F (9), Al (13), Ga (31), Sr (38), Zr (40), I(53) and Terbium (65).
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Which of the following wavelength does NOT belong to visible light?
A.
690 nm
B.
900 nm
C.
500 nm
D.
390 nm
Answer:
I think is A 690 nm or c 500 nm
The wavelength that does not belong to visible light is 900 nm. The correct option is B.
What is visible light?Visible light is the electromagnetic spectrum that an eye can see. The wavelength of visual light is 382 700 nanometers. The daylight is the most visible light whose wavelength is 515 NM and whose color is green and yellow. The infrared, the range of spectrums of visible light, falls between infrared and ultraviolet light.
Wavelength is the distance of 1 wave to another wave full stop as light moves in the form of waves, that difference between one crust to another crust is called the wavelength of the light.
As the wavelength of visible light is 382 700 NM option b 900 NM will be will not fall under the spectrum of visible light.
Thus, the correct option is B. 900 nm.
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