Answers
Related Questions
HELP IN 8TH GRADE ADV SCIENCE
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Answer:
protons: 36
neutrons: 48
electrons: 36
1. How many moles of Mg are there in 9.20 x 1024 atoms of Mg?
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Answer:
15.28 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{9.20 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 15.282392..[/tex]
We have the final answer as
15.28 molesHope this helps you
A scientist observes plant roots growing through the mountain side. This is evidence for which type of natural process?
Physical weathering
Chemical Weathering
Erosion
Deposition
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Answer:
I think chemical Weathering
Answer:
Deposition is the answer
Explanation:
The potential difference between the top and bottom of a D cell battery is
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Answer:
Does it have a picture?
Explanation:
The potential difference between the top and bottom of a D cell battery is derived by the use of a voltmeter between the +ve and -ve poles.
What is the Potential difference?The potential difference is simply defined as two points that reflect the energy released in transferring a unit quantity of electricity from one spot to the other.
In conclusion, Potential difference is also known as the voltage across two points in a circuit.
Read more about Voltage
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When a chemical reaction takes place, the number of atorns of each element in the reactants
nunber of atorms of each element in the products.
will be dferent from
must be equal to
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Answer:
The law of conservation of matter says that matter cannot be created or destroyed. In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products
Explanation:
Ed made pancakes from batter, freshly squeezed orange juice, fried eggs, and a strawberry fruit salad. Identify the chemical changes that occur to the food items during breakfast preparation
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Answer:
Warming the batter and frying the eggs.
Explanation:
This is a chemical change as the products have very different property as compared to reactant not only physically but also chemically. Therefore, the reaction that is associated with cooking is combustion reaction.
What is chemical change?
Chemical change is a reaction in which breaking and forming of new bonds take place. One molecule completely converted to totally different molecule. The number of atoms remains same
One famous example of chemical change is the rusting of iron. The color, odor and arrangements of atoms in products are very much different from reactant. Chemical change are mostly irreversible in nature.
Cooking is a chemical change not a physical change. During cooking the reaction that is associated is combustion reaction as the by product is carbon dioxide and water.
Therefore, the reaction that is associated with cooking is combustion reaction.
Learn more about the chemical change, here:
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How many grams are in the quantity: 2.5 mol of NaCl
Answers
Answer: The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles NaCl, or 58.44277 grams.
Explanation:
What is the value for AG at 100 Kif AH = 27 kJ/mol and AS = 0.09 kJ/(mol-K)?
A. AG = 2700 kJ/mol
B. AG = -36 kJ/mol
C. AG = 0 kJ/mol
D. AG = 18 kJ/mol
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Answer:
ΔG = 18KJ/mol
Explanation:
Given data:
ΔS = 0.09 Kj/mol.K
ΔH = 27 KJ/mol
Temperature = 100 K
ΔG = ?
Solution:
Formula:
ΔG = ΔH - TΔS
ΔH = enthalpy
ΔS = entropy
by putting values,
ΔG = 27 KJ/mol - 100K(0.09 Kj/mol.K)
ΔG = 27 KJ/mol - 9 KJ/mol
ΔG = 18KJ/mol
Tony sets up an experiment inside his classroom. He spaces 5 plants at equal distances along a straight line, with the first plant directly in front of a window and the last plant 10 meters (m) away from the window. He gives them equal access to air and water and then monitors the amount of gas each plant releases.
Which gas is Tony monitoring and what trend is he most likely to see in the data he collects?
He is monitoring oxygen. The amount of gas released should be highest for the plant in the middle and lowest for the plants at the ends.
He is monitoring carbon dioxide. The amount of gas released should be highest for the plant in the middle and lowest for the plants at the ends.
He is monitoring oxygen. The amount of gas released should be highest for the plant closest to the window and lowest for the plant farthest away from the window.
He is monitoring carbon dioxide. The amount of gas released should be highest for the plant closest to the window and lowest for the plant farthest away from the window.
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Answer:
I believe the answer is
"He is monitoring oxygen. The amount of gas released should be highest for the plant closest to the window and lowest for the plant farthest away from the window."
Explanation:
I may be wrong but thats my guess it seems the most accurate
the structural formula for CF4 is
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Answer:
PubChem CID 6393
Structure
Find Similar Structures
Chemical Safety
Compressed Gas
Laboratory Chemical Safety Summary (LCSS) Datasheet
Molecular Formula CF4
Molecular Weight
88.004 g/mol
Explanation:
carbon tetra fluoride. tetrefluoromethane is a colorless nonflammable gas
i couldn’t find the structural formula but this is the compound for CF4
Which of the following chemical formulas contains the most molecules?
A. 5CO
B. 3H2O
C. 2Fe2O3
D. 4C3H8
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Can someone tell me how to identify the number of significant figures?
I solved a molarity word problem and I got the answer 1.138 moles. I need to find the number of significant figures for this number. If you could use 1.138 as an example, that'd be great.
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Answer:
Non-zero digits are always significant.
Any zeros between two significant digits are significant.
A final zero or trailing zeros in the decimal portion ONLY are significant. If a number ends in zeros to the right of the decimal point, those zeros are significant.
Explanation:
1.138 has 4 significant figures, which are 1, 1, 3 and 8. The numbers after the decimal point are decimals and are significant figures.
An ion with 11 protons 12 neutrons and a charge of + 1 has an atomic number of
what? And how many electrons total?
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Answer:
11 electrons total and 23amu
Explanation:
This tells us that sodium has 11 protons and because it is neutral it has 11 electrons. The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass). Sodium has a mass number of 23amu.
HUGE REWARD - 30 POINTS AND BRAINLY!
What is the atomic number of this element?
Answers
Answer:
7
Explanation:
ATOMIC NUMBER IS NUMBER OF PROTONS
PROTONS have positive charge
Answer:
7
Explanation:
sorry i accidentally put a 2 first
The properties of matter depend on the types of atoms a substance is made of.
true of false?
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true 100% i just had a quiz on this.
Apple juice can be classified as which of the following?
O A compound
An Element
O A mixture
O A pure substance
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Answer:
mixture
Explanation:
Answer:
Mixture
Explanation:
Which of the following pairs of half-reactions would have a negative total
reduction potential?
A. Copper (Cu) reduced, zinc (Zn) oxidized
B. Hydrogen (H) reduced, sodium (Na) oxidized
C. Mercury (Hg) reduced, iron(II) (Fe) oxidized
D. Silver (Ag) reduced, gold (Au) oxidized
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Answer: silver reduced, gold oxidized
Explanation:
Answer:
D
Explanation:
orange juice being made from fresh oranges
O a. physical property
Ob. physical change
O c. chemical property
O d. chemical change
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d. what happens when an iron nail is kept in copper sulphate solution?
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Answer:
it changes color from blue to light green.
Explanation:
due to copper iron nail functions
Answer:
give the other person brainlieset plz
Explanation:
Which of the following may indicate that a chemical reaction has occurred?
a. release of energy as light
b. a color change
C. gas bubble formation
d. All of the above
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Answer:
D, all of the above
Explanation:
Is radium usually considered as part of the alkaline earth category in terms of chemistry?
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Explanation:
Radium (atomic number 88) has similar properties to barium and is also in the Group 2 category. However, radium is a radioactive element and is generally under the category of radioisotopes in addition to being an alkaline earth metal, because it is not a stable element.
Jonah realize even though she’s crushing the cans in the amount of material in the can is unchanged which of the following describes the reaction that is taking place
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a change in form or appearance of matter
Explanation: CAUSE IT STILL IS THE MATERIAL JUST IN A DIFFERENT SHAPE
Answer:
A change in form, or appearance of matter. Is your answer, can I have Brainliest? :) Have a great day! Hope it's right!
Why is it important to pasteurize certain liquids?
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Answer:
Pasteurization involves heating liquids at high temperatures for short amounts of time, it can make it better if you wanted hot cocoa but bad for milk
Explanation:
Answer:
Pasteurization kills harmful microbes in milk without affecting the taste or nutritional value
Explanation:
* The cost of table salt and table sugar is Rs 15 per kg.
and Rs 69 per kg respectively calculate their cost per mole?
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Cost per mole
Table salt : Rs 0.878
Table sugar : Rs 23.63
Further explanationGiven
Cost table salt (NaCl) = 15/kg
Cost table sugar(sucrose-C12H22O11) = 69/kg
Required
cost per mole
Solution
mol of 1 kg Table salt(NaCl ,MW= 58.5 g/mol) :
[tex]\tt mol=\dfrac{1000~g}{58.5}=17.09~mol=Rs~15\rightarrow 1~mol=Rs~0.878[/tex]
mol of 1 kg Table sugar(C12H22O11 ,MW= 342 g/mol) :
[tex]\tt mol=\dfrac{1000}{342}=2.92~mol=Rs~69\rightarrow 1~mol=Rs~23.63[/tex]
How are light bulbs made
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Answer:
Explanation: The air inside the bulb is taken out and replaced with a gaseous mixture of argon and nitrogen which help ensure a longer-life for the filament. The bulb will be tested to make sure they're up to the job.
The __________ system is responsible for bringing oxygen into the lungs and releasing carbon dioxide from the body
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Answer:￣ﾉﾞ(｡･∀･)ﾉﾞo(*￣▽￣*)ブ(*￣3￣)╭o(*￣▽￣*)ブ(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭(*￣3￣)╭•)>⌐)↖↗↘↙↜↚↯↟↝↖↔↕↙↘↙↘↘↞↴↯↚↨⇌⇋⇆⇉⇑↶⇋⇋↳¾⁷¼¼⁶⁴⁷⁰⁰⁰⁹⅕⅘⅓⅕⅓⅕⨊⨡⨔⨩⨦⨶⨼⨿⨷⨷⨻⨼⨹₴ The answer is resperitory
Explanation:
What are the classifications of these compounds? Are they triglycerides?
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Answer:
Yes they are triglycerides
Explanation:
Triglycerides are esters derived from glycerol and three fatty acids.
If we look at the structures closely, we will notice that the compounds are composed of glycerol and three fatty acids.
Hence the structures are triglycerides. The first structure is an unsaturated triglyceride while the second structure is a saturated triglyceride.
The most abundant element is
A. Sulfur
B. Oxygen
C. Silicon
D. Carbon
E. hydrogen
Answers
Answer:
E. hydrogen
Explanation:
Hydrogen is the most abundant element in the Universe.Answer:
Its E. hydrogen
Explanation:
Hello Hi so um... I don't know what to say so um... yeah MOLLOC WAS HERE!!!!!!!!!!!!!!!!
Answers
Answer:
hi nice to meet you, just be your self and ask your questions, its all good we are nice people
Explanation:
have a great day, please mark as brainliest please
Hello! Be ur self, ask questions and ask questions. Okibye
How did humans create cow breeds that survive well in cold weather?
Select one:
O
They identified cows that did well in cold weather and mated them.
O
They mated cows with sheep that had very thick wool.
O
They mated cows with caribou that tolerated the cold well.
O
They identified cows that did well in hot weather and mated them
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Answer: They identified cows that did well in cold weather and mated them. This is known as selective breeding. All the other answers either cannot work as cross-species breeds generally don't work, or they target cows that survive well in hot weather.