Answer:
The rice will move
Explanation:
the sound vibration and waves will cause the rice to move
Answer:
The rice will begin to move.
Explanation:
15 and extra credit not 14
For which salt is the aqueous solubility most likely to change by changing the pH of the solution?
a) CaF2(aq)
b) CaCl2(aq)
c) CaI2(aq)
d) CaBr2(aq)
The salt whose aqueous solubility will most likely to change the pH of the solution is CaF2(aq).
The pH of a salt solution depends on the nature of the acid and base that forms the salt.
Salt of a weak acid and a strong base yields a basic solutionSalt of a strong acid and a weak base yields an acidic solutionSalt of a strong acid and a strong base yields a neutral solution.Since HF is a weak acid, its salt CaF2 will be slightly basic when dissolved in water hence the pH of the solution is altered.
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Write the formula of the first five members in the series of alkynes
3 points
If 1.40 mol of Mg are mixed with 2.00 mol of HCl, how many moles of excess reactant remain after the reaction is complete?
2HCl(aq) + Mg(s) - H2(g) + MgCl2 (aq)
Note: Do not include units when you enter your answer.
Type your answer...
Previous
Answer:
H2(g) + MgCl2 (aq)
Explanation:
How many moles of carbon are 8.7x1023 atoms of carbon?
One mole of every substance contains 6.022×10²³ number of atoms. One mole carbon have these much atoms and thus number of moles of carbon having 8.7 × 10²³ atoms is 1.44 moles.
What is carbon?Carbon is 6th element in periodic table. It is a p block element and is a non-metal. Carbon forms covalent bonds with other elements.
One mole of every elements contains 6.022×10²³ number of atoms and it is called Avogadro number. Similarly one mole of a compound contains 6.022×10²³ number of molecules.
The number of atoms in one mole of carbon is 6.022×10²³.Therefore, number of moles of carbon which contains 8.7 × 10²³ atoms is calculated as follows:
number of moles of carbon = 8.7 × 10²³/6.022×10²³
= 1.44 moles.
Therefore, the number of moles of carbon containing 8.7 × 10²³ atoms is 1.44 moles.
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State the type of reaction and balance it properly: NaOH + CaBr2 → Ca(OH)2 + NaBr
Answer:
2NaOH(aq) + CaBr2(s) → Ca(OH)2(s) + 2NaBr(aq)
The given chemical equation depicts chemical reaction of double displacement type and it's balanced chemical equation is 2 NaOH + CaBr₂ [tex]\rightarrow[/tex] Ca(OH)₂ + 2 NaBr.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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The electronic structure 1s22s22p63523p64523d8 refers to the ground state of
Kr.
Ni.
Pd.
Fe.
none of the above.
Previous
Answer:
Ni
Explanation:
Electronic configuration given by
[tex]\\ \sf\longmapsto 1s^22s^22p^63s^23p^64s^23d^8[/tex]
No expectations so it's Z=28Element is nickel
explain why the reaction between calcium carbonate and sulphuric acid would not get to completion
Answer:
The calcium sulphate is insoluble in dilute sulphuric acid and so you end up with calcium carbonate coated in a layer of calcium sulphate, which stops the acid from getting at the carbonate and so stops the reaction. so you would not get any completion .
Determine the mass percentage of carbon, C, hydrogen, H, and oxygen, O, in C6H8O7. Refer to the periodic table for the atomic mass of each element.
Answer:
C=37.5% H=4.2% O=58.3%
Explanation:
molar mass of element / molar weight of compound X 100% (for each element)
C mass = 12 x 6 = 72
H mass = 1 x 8 = 8
O mass =16x 7 = 112
Molar weight of compound = 192
72/192(100%)= 37.5% C
8/192(100%) = 4.2 % H
112/192 (100%) = 58.3% O
The mass percentage of carbon, hydrogen, H, and oxygen, O, in C₆H₈O₇ is C = 37.5% H = 4.2% O = 58.3%.
What is the mass percentage?The concentration of an element in a compound or component in a combination is calculated by the mass percentage.
The collective of a component is divided by the entire mass of the mixture to obtain the mass percentage, which is then multiplied by 100%.
Given, finding the mass percentage of carbon, hydrogen, H, and oxygen, O, in C₆H₈O₇
the molar mass of element / molar weight of compound X 100% (for each element
First, calculate the molar mass of the elements given in the compound.
C mass = 12 x 6 = 72
H mass = 1 x 8 = 8
O mass =16x 7 = 112
Molar weight of compound = 192
72/192(100%)= 37.5% C
8/192(100%) = 4.2 % H
112/192 (100%) = 58.3% O
Thus, the mass percentage is C = 37.5% H = 4.2% O = 58.3%.
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Why is protection from radiation needed?
Answer:
Because you could die or get seriously burn bad
Answer:
Radiation protection aims to reduce unnecessary radiation exposure with a goal to minimize the harmful effects of ionizing radiation. ... As radiation exposure becomes more prevalent, a thorough understanding of radiation exposure risks and dose reduction techniques will be of utmost importance.
Explanation:
how many salt and water would you use to prepare 10% salt solution?
Answer:
We can make 10 percent solution by volume or by mass. A 10% of NaCl solution by mass has ten grams of sodium chloride dissolved in 100 ml of solution. Weigh 10g of sodium chloride. Pour it into a graduated cylinder or volumetric flask containing about 80ml of water.
Explanation:
have a good day
Giúp mình câu này với ạ, mình cảm ơn!
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this one too please lol
Answer:
It looks like 43 to me, so 43 ml?
Explanation:
I'd say that's 43ml
Hope this helps- have a good day bro cya)
What is the name for the electrons involved in metallic bonding ?
Answer:
valence electrons
Explanation:
Why was the morning session stopped unsuccessfully?
The reactor was overheating.
The automatic control system was not adjusted properly.
The vernier control rod became stuck.
The emergency rod failed.
Answer:
the reactor was overheating
A substance has a freezing point of –38°C and a boiling point of 356°C. At what temperature would this substance be in its liquid state?
A) -100°C
B) -50°C
C) 80°C
D) 375°C
Answer:
X. 80°
Explanation:
if the substance is below -38 then it is in the solid phase (-100° and -50°) and if it is above 356° it is a gas (375°). Therefore anything in the middle is a liquid, 80°.
Given that the substance freezes at –38°C and boils at 356°C, it will be a liquid at a temperature of 80°C.
What is liquid range?The term liqiid range refers to the temperatire range within which a substance remains in its liquid state. Now we are told that the substance freezes at –38°C and boils at 356°C.
Hence, we expect that this substance will be in the liquid state at a temperature of 80°C.
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what is the percent by mass of chlorine in potassium chloride
Answer: Originally Answered: A sample of 0.892g of potassium chloride is dissolved in 54.6g of a water. What is the percent by mass of the potassium chloride in this solution?
Well, take the quotient…
0.892∙g0.892∙g+54.60∙g×100% percentage by mass potassium chloride
≈2%
Explanation:
What is the most unique element and why
Answer:
The answer is Aluminium.
Explanation:
It has low density, is non-toxic, has a high thermal conductivity, has excellent corrosion resistance and can be easily cast, machined and formed. It is also non-magnetic and non-sparking. It is the second most malleable metal and the sixth most ductile.
Explain why powdered magnesium reacts faster with 30cm3 of 2M Hydrochloric acid
than equal mass of Magnesium ribbon with 30cm3 of 2M hydrochlorric acid
Answer:
powder has more surface area than a ribbon since each grain also has its own "spherical" surface area compared to a magnesium ribbon where you can only see the top and bottom of the grains as a collective
Chapter 15 Lesson 3 Protecting Earth
pointsssssssssssssss
Answer:
May i ask what is the question?
Explanation:
write the formulas of the above. compounds and the symbol of its elements.
Answer:
a.MgO
b.CaO
c.SO2
d.Na2O
e.CO2
Please help me with this question it’s really confusing and I’ll give you extra credit :)) THANK YOU SMM
Answer:
it wants you to conclude what you have learned by writing if you think there is a link between the impact and the extinction of the dinosaurs by stateing any similarities to the two events and provide evidence to surpport your claim
Explanation:
A 125g sample of a mixture of salt and sand contains 12% salt.
a. How much salt (in g) does the sample contain?
b. How much sand (in g) does it contain?
Complete the paragraph below. Do it using your Science journal or notebook
SUSPENSION IS A KIND OF MIXTURE____________________________
_________________AS IT________________________________AT THE BOTTOM WHEN LEFT UNDISTURBED
Answer:
SUSPENSION IS A KIND OF MIXTURE where particlea are visible to the naked eyes AS IT settled AT THE BOTTOM WHEN LEFT UNDISTURBED.
Why are mass of atoms called relative masses?
The atomic mass constant (symbol: mu) is defined as being 112 of the mass of a carbon-12 atom. Since both quantities in the ratio are masses, the resulting value is dimensionless; hence the value is said to be relative.
Kaya is riding her dirt bike eastward on a dirt road. She spots a pothole ahead. Kaya slows from 20.0 m/s to 6 m/s in 6.0 s. What is her acceleration?
[tex]\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}[/tex]
[tex]\\ \sf\longmapsto Acceleration=\dfrac{6-20}{6}[/tex]
[tex]\\ \sf\longmapsto Acceleration=\dfrac{-14}{6}[/tex]
[tex]\\ \sf\longmapsto Acceleration=-2.3m/s^2[/tex]
Jim makes a table that lists soluble and insoluble substances. Which statement best explains why the table is incorrect?
a table with the titles Soluble and Insoluble, written underneath Soluble is sugar, food coloring, and honey, and written underneath Insoluble is sand, grass, and salt
A. Food coloring is an insoluble substance.
b. Honey is an insoluble substance.
C. Grass is a soluble substance.
D. Salt is a soluble substance.
Answer:
D
Explanation:
The statement that best explains why the table is incorrect is: Grass is a soluble substance. Option C is correct.
In the table, grass is listed under "Insoluble," but in reality, grass is not a substance that dissolves in water. It is a complex mixture of various compounds, including cellulose and other organic materials, which are not water-soluble. Grass does not dissolve when added to water; instead, it remains intact and is not readily soluble.
On the other hand, all the other substances listed in the table are correctly categorized. Sugar, food coloring, and honey are soluble substances because they dissolve in water. Sand and salt are insoluble substances because they do not dissolve in water.
Hence, C. is the correct option.
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SH
&H - HD
H)
iH)
CH=CII CH
-
CH,
H
SH
Nh3 metabolism - Urea cycle
Explanation: The urea cycle (also known as the ornithine cycle) is a cycle of biochemical reactions that produces urea (NH 2) 2 CO from ammonia (NH 3). This cycle occurs in ureotelic organisms. The urea cycle converts highly toxic ammonia to urea for excretion.
The best representation of the ozone molecule incorporates both of the structures that you drew in parts C and D.
Redraw the Lewis structures of an ozone molecule and place a two-ended arrow between the structures, pointing to both
of them. This representation is called a resonance structure.
Answer:
Explanation:
EDMENTUM
The Lewis structure for ozone contains a central oxygen atom that has a double bond to one oxygen atom and a single bond with the other oxygen atom. The resonance structure of the ozone is shown in the attached figure below.
What is the lewis structure of the ozone molecule?The oxygen molecule has a valency of -2. It can form two-sigma bonds or covalent bonds with the other atoms. Oxygen contains three lone pairs to form π bonds with other atoms. Ozone contains all three oxygen atoms and is a dihedral molecule with sp² hybridization.
Lewis structure is generally based on the octet rule which states that there should be eight electrons in the valence shell or orbit of an atom for a stable molecule.
The lone pair on the central oxygen atom repels the electrons in the two side bonds and adopt a bent molecular geometry. The expected geometry is the trigonal planar with a bond angle is 120°.
In an ozone molecule, six valence electrons for each molecule of Oxygen so the total number of valence electrons is 6 × 3 = 18. As both Oxygen atoms on the sides have the same electronegativity, therefore, the double bond keeps on shifting from both causing resonances.
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