Answers
Answer:
the second one
Explanation:
THE answers is b
Related Questions
What is the chemical equation?
Electrolysis (splitting) of water.
H20-->
Answers
Answer:
hydrogen(H2) and oxygen gas(O2
PLS HELP URGENT
Electron dot diagrams
Use your periodic table to write the electron dot diagrams for the following atoms.
1. Calcium (Ca)
2. Polonium (Po)
3. Moscovium (Mc)
4. Boron (B)
5. Fluorine (F)
Answers
.
7)
A 1-gram sample of which substance in a sealed 1-liter container will occupy the container
completely and uniformly?
A)
H2O(g)
B)
H2000)
C
Hg(0)
D)
Ag(s)
Answers
Answer:A) H20 gas
Explanation:
Based on the property of gases, 1-gram sample of hydrogen gas, H₂ in a sealed 1-liter container will occupy the container completely and uniformly.
What is the nature of a gas?Gases are one of the states of matter.
Gas molecules have negligible forces of attraction between them, therefore, they are always in motion.
Gases do not have a specific shape or volume, rather they fill up every available space in their container.
Of the given option, only H₂ is a gas.
Therefore, 1-gram sample of hydrogen gas, H₂ in a sealed 1-liter container will occupy the container completely and uniformly.
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Calculate the number of moles of NaOH contained in 250. mL of a 0.05M solution.
Answers
Answer:
0.0125mol
Explanation:
Molarity (M) = number of moles (n) ÷ volume (V)
n = Molarity × Volume
According to this question, a 0.05M solution contains 250 mL of NaOH. The volume in litres is as follows:
1000mL = 1L
250mL = 250/1000
= 0.250L
n = 0.05 × 0.250
n = 0.0125
The number of moles of NaOH is 0.0125mol.
_________deep-sea currents that occur because of differences between the salinity and temperature characteristics of water masses
Lesson 2.12
Question 3 options:
Density
Thermohaline currents
Salinity
Polar ice caps
Answers
Answer:
its B) Thermohaline currents Sorry if its wrong but im sure this could be it
Explanation:These deep-ocean currents are driven by differences in the water's density, which is controlled by temperature (thermo) and salinity (haline). This process is known as thermohaline circulation. In the Earth's polar regions ocean water gets very cold, forming sea ice.
Thermohaline currents deep-sea currents that occur because of differences between the salinity and temperature characteristics of water masses
What is thermohaline currents?Thermohaline currents is also known as 'the ocean conveyor belt' or 'the global conveyor belt'. It is a part of the large scale ocean circulations.
As the name thermohaline suggested that, 'thermo' means heat and 'haline' refers to the salt content. So, when there is a great difference in the temperature and the salt content deep sea currents occur.
Hence option (2) is correct i.e. thermohaline currents occur due to temperature and salinity difference.
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Solid potassium chloride is obtained by the reaction of solid potassium and chlorine gas.
Write a balanced chemical equation for this reaction.
Answers
Answer:
2 K(s) + Cl₂ (g) --> 2 KCl(s)
Explanation:
Potassium will just be K
Chlorine gas is part of BrIClHOF, which are diatomic gasses. So Cl₂
Looking at the periodic table potassium K has an ion charge of +1 and chlorine Cl has an ion charge of -1, so in a balanced compound they will be written as KCl
Balancing the amounts of each will lead to 2 K(s) + Cl₂ (g) --> 2 KCl(s)
Help please I will give brainliest with 1
Answers
Kitchen Math: Measuring
1. By understanding how to measure ingredients, time and temperature,
you take the guesswork out of cooking.
2. The two scales for temperature are Fahrenheit and Celsuis.
3. The three times to wash when cooking are: A. before cooking
B. during cooking
C. after handling of food
4. The three kinds of measurement are
A. estimated
B. ratio
C. calibrated measurement
5. Estimated measurement is great for foods such as soup.
6. Ratio cooking compares the amount of one ingredient to another
ingredient.
7. The most common kind of kitchen measurement in America is the English system.
8. One quart is almost a liter.
9. The metric system is based on tens.
Kitchen Math 3
Learning ZoneXpress 888-455-7003 • www.learmingzonexpress.com
10. Measuring tools you find in almost every kitchen are timers, thermometers and measuring containers.
11. Water freezes at 32 Fahrenheit and 0° Celsius. Water boils at 212" Fahrenheit and 100° Celsius.
12. When measuring dry ingredients, you want to dip, scoop and scrape.
13. If your recipe calls for sifted flour, sift it before you measure.
14. Brown sugar, cooked rice and chopped parsley need to be packed down in measuring cups
15. When measuring liquids, get down at eye level.
16. Measuring spoons are used for both liquid and dry ingredients.
17. Use the back of a knife to scrape off dry ingredients when using a measuring spoon,
18. Taring is when you allow for the weight of a container or wrapper.
19. Dry ingredients do not weigh the same as wet ingredients.
20. A large egg weighs about 2 ounces.
21. Turn pancakes when you see bubbles on the top.
how many liters are in 4x10^23 atoms of CO
Answers
Answer:
3.346*10^25
Explanation:
Hope this helps
Fe2O3 (s) + 2 Al (s) ---> 3 Fe (l) + Al2O3 (s) Based on the thermite reaction, how much aluminum oxide (Al2O3) is formed from 8.0 grams of aluminum (Al)?
Answers
Answer:
15.3 g
Explanation:
Fe₂O₃ (s) + 2Al (s) → 3Fe (l) + Al₂O₃ (s)First we convert 8.0 grams of aluminum into moles, using its molar mass:
8.0 g Al ÷ 27 g/mol = 0.30 mol AlThen we convert 0.30 moles of aluminum into moles of aluminum oxide, using the stoichiometric coefficients:
0.30 mol Al * [tex]\frac{1molAl_2O_3}{2molAl}[/tex] = 0.15 mol Al₂O₃Finally we convert 0.15 moles of Al₂O₃ into grams, using its molar mass:
0.15 mol Al₂O₃ * 102 g/mol = 15.3 g Al₂O₃True or false Compounds link up to make elements
Answers
Answer:
false
compound are formed from elements .
5. Now you want to know the distance in AU to each place where
you will be traveling. That way, you can relate each distance to our
solar system. What conversion factor will you need to multiply by to
convert kilometers to AU? (Hint: 1 AU = 149,598,000 km)
Answers
Answer:
Multiply the length value by 6.68456e-9
Explanation:
The question involves converting from one unit (kilometers) to another unit (Au)
From the question;
149,598,000 km = 1 AU
1 km = x
Cross multiplying;
1 * 1 = x * 149,598,000
1 = 149,598,000x
x = 1 / 149,598,000
x = 6.68456e-9
To convert kilometer to Au; Multiply the length value by 6.68456e-9
How many moles of gas are contained in 890.0 mL at 21.0 at C degrees and 750.0 mm Hg pressure?
Answers
Answer:
There are 0.0364⋅mol
Explanation:
Using the equation below, calculate the percent yield of H3PO4 if an experiment that started with 12.98 grams of HCl and excess Na3PO4 yielded 8.42 g of H3PO4. Please round to the nearest 0.01 and remember units and substance.
Na3PO4 + HCl --> NaCl + H3PO4
Answers
How much sugar can be dissolved of the 0.3 ml of water is heated to 1000C?
Answers
Use the diagram below to answer the question.
An Energy Relationship in an Ecosystem
grass
mouse
Which statement best describes the energy relationship shown between the organisms?
Both produce their own energy.
b Only the mice need energy to survive.
They compete for the same source of energy.
Energy flows from the producer to the consumer.
Answers
Answer:Where is the diagram
Explanation:
(Help would be greatly appreciated) Which sweet tea would you expect to taste the sweetest?
1. 1M
2. 3M
3. 3.1M
4. 2.5M
Answers
Answer:
3.1 M
Explanation:
3.1 M has the highest concentration of sweet tea so it should taste the sweetest.
HELP! WILL MARK BRAINLYEST!!
The following formula d/t is used for calculation what?
Answers
The formula is used for calculating speed. D stands for distance, T stands for time. Full formula is S=D/T
PLEASE HELP.!
While studying meiosis and mitosis for her genetics test, Marisa made notes of the kinds of cells produced from these processes with examples from the body. Which pairing of the cell produced during meiosis and example is correct?
A) diploid cell: liver cell
B) diploid cell: sperm cell
C) haploid cell: egg cell
D) haploid cell: hair cell
Answers
Answer:
C
Explanation:
The pairing of the cell produced during meiosis and correct example is haploid cell: egg cell (Option C).
A haploid (n) cell contains only a set of homologous chromosomes, whereas a diploid (2n) cell contains two sets of homologous chromosomes. Meiosis is a type of reductional cell division by which a parental diploid (2n) cell generates four haploid germinal (egg) daughter cells having half of the genetic material.Conversely, mitosis is a type of cell division that produces two genetically identical daughter cells.Meiosis produces germinal (sex) cells, whereas mitosis produces somatic (body) cells.In conclusion, the pairing of the cell produced during meiosis and correct example is haploid cell: egg cell (Option C).
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When a piece of copper metal at 100ºC was placed into a cup of water at 25ºC, the final temperature of both substances reached 30ºC within a minute. Which of the following statements is TRUE about the transfer of energy between the two substances?
A. Copper lost less energy than the amount of energy gained by water
B. Copper lost more energy than the amount of energy gained by water
C. Copper lost the same amount of energy that was gained by water
D. Copper gained the same amount of energy that was lost by water
Answers
Answer:
imma say C or D
Explanation:
What is the unit of measurement for potential electric energy existing between two points on a circuit?
A. Joule
B. Voltage
C. Current
Answers
It is Joules/Coulombs which is the same thing as Voltage.
1. Define action energy.
Answers
Answer:
In physics, action is an attribute of the dynamics of a physical system from which the equations of motion of the system can be derived through the principle of stationary action. ... Action has dimensions of energy⋅time or momentum⋅length, and its SI unit is joule-second.
Explanation:
hope it helps
Answer:
Action is an attribute of the dynamics of a physical system from which the equations of motion of the system can be derived through the principle of stationary action.
Explanation:
How does natural gas impact the environment
I REALLY NEED THIS SOON!!!!!!!
Answers
Answer: Burning natural gas for energy results in fewer emissions of nearly all types of air pollutants and carbon dioxide (CO2) than burning coal or petroleum products to produce an equal amount of energy.
Explanation:
Answer:
Natural gas is a relatively clean burning fossil fuel . Burning natural gas for energy results in fewer emissions of nearly all types of air pollutants and carbon dioxide than burning coal or petroleum products to produce an equal amount of energy.
Explanation:
Help pwease!!!!!!!!!!!!!!!
Answers
Answer:
B
Explanation:
I think its water desposits clay in thick , flat layers because the way how a clay feels.
What volume of a 0.100 M AgNO3 solution is required to completely react with the CaCl2 in 3.00 L of a 0.100 M CaCl2 solution? The balanced chemical equation is: 2 JUpper A g upper N upper 0 subscript 3 plus upper C a upper C l subscript 2 right arrow 2 upper A g upper C l plus upper C a (upper N upper O subscript 3) subscript 2. L AgNO3
Answers
Answer:
6.00 LAgNO3
Explanation:
Got it right on Edge. :)
Answer:
B
Explanation:
I’ll really appreciate it if you help me out on this one .
Answers
-Water levels are dangerously high for wildlife and humans.
-Animals seem to be lost, like the cow and the sheep especially.
2.
-There are not many trees near the water, meaning less areas for wildlife to live.
-There is not much wildlife in general.
Inferences
1. The wildlife shown will move relocate and adapt to another area.
2. Industry — emissions are visible in top left— will continue to hurt the environment. CO2 emissions will increase.
Good luck!
Please help me with this question tyy
Answers
Oh sheesh girl.. this is tricky.. but I can try:)
Between the chemical reaction of the chemicals and the label on the bottle the ions from in the radioactive product contained in the bottle separates the label from the surface. Im guessing that due to the "radioactive waste" in the bottle that there are components of thermal heat, that may also have an effect on the "label". So when talking about the reaction we have a chemical and thermal reaction happening.
I tried... and im sorry if it dosen't make sense... +_=||
have a wonderful day :)
It takes 5.54 mL of a 2.18 M NaOH solution to neutralize 6.19 mL of an HCl solution. What is the concentration of the HCl solution? Do not include units in your
answer. Round to the tenths place or further.
Answers
Answer:
2 M
Explanation:
NaOH + HCl --> NaCl + H2O,
5.54 mL = .00545 L,
If we consider 2.18 M, M [molarity] = mol/L, so we have 2.18 mol/L. From this we can get the moles of NaOH.
.00545 L * 2.18 mol/L ≈ .0121 mol
The concentration of HCl can be found from the following:
.0121 mol = .00619(x) [where x = concentration of HCl]
x = 1.955 M ≈ 2 M
We equate the two as we require the same amount in order to neutralize the base.
What is the % of each element in (NH4)2(SO4)?
Answers
Nitrogen=21.1999%
Hydrogen=6.1023%
Sulfur=24.2660%
The percent composition of nitrogen, hydrogen, sulfur , oxygen in ammonium sulfate is 21.18%, 6.05%,24.21%,48.43% respectively.
What is percent composition?The percent composition is defined as a convenient way to record concentration of solution.It is a expression which relates solute to solvent as,mass of solute/mass of solution ×100.It helps in elemental analysis of a given compound by giving proportions in which they are present.
Percent composition of N= 28/132.14×100=21.18%
Percent composition of H=8/132.14×100=6.05%
Percent composition of S=32/132.14×100=24.21%
Percent composition of O=64/132.14×100=48.43%.
Thus, the percent composition of nitrogen, hydrogen, sulfur , oxygen in ammonium sulfate is 21.18%, 6.05%,24.21%,48.43% respectively.
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Determine the final temperature of a mixture of 50 grams of water at 10 C added to 120 grams of water at 80 C. Show all work. Use the simulator to check your answer. (Hint: This is a weighted average.)
Answers
Answer: 59.41
Explanation:
The final temperature of the system has been 130[tex]\rm ^\circ C[/tex].
Specific heat can be defined as the amount of heat required to raise the temperature of 1 g of substance by 1-degree celsius.
The amount of heat lost and the heat gained have been equal.
Heat = mass × specific heat × change in temperature
Thus,
mc[tex]\Delta[/tex]T = mc[tex]\Delta[/tex]T
50 g × (10 - x) = 120 × (x - 80)
500 - 50x = 120x - 9600
70x = 9100
x = 130
Thus, the final temperature of the system has been 130[tex]\rm ^\circ C[/tex].
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example of gases collected through upward delivery
Answers
Answer:
In this process The more dense gases are collected in a gas jar. Carbon dioxide, Nitrogen dioxide are collected by this way. Air is displaced upward thus, this process is known as upward delivery
Hope it helped :)