Answer:
16.58
Explanation:
22.80
-
6.22
_____
16.58
law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed. Therefore, the quantity of mass is conserved over time.
I hope that helps
If a balloon full of nitrogen gas is submerged from the surface of a pool to the bottom of that same pool, what will happen as the pressure on the balloon increases?
Answer:
The volume of the balloon will decrease.
Explanation:
I had some leftover liquid nitrogen so I tried it in my pool.
Which of the following is not true?
a) Staic cling or electrostatic attraction is never useful
b) lighting bolts are giant sparks caused by the build up of static charge
C) static cling cause plastic wrap to stick to your lunch
D) people who work on computer parts must reduce net the net static charges on objects to avoid damging sensetive circuits
E) static charges must be reduced in many situations to protect people and equitment
Answer: C i believe
Explanation: Common sense
Help pls , question is in picture
Explanation:
IM PRETTY SURE IT IS D !! IF ITS WRONG IM SORRY THAT WHAT
I GOT
Carnegie Development stages
Answer:
Stage 1: 1 days.
Stage 2: 2-3 days.
Stage 3: 4-5 days.
Stage 4: 6 days.
Stage 5 (a-c): 7-12 days.
Stage 6: c. 17 days.
Stage 7: c. 19 days.
Stage 8: c. 23 days.
Which factors determine the length of a bond between two elements?
Answer:
The length of the bond is determined by the number of bonded electrons (the bond order). The higher the bond order, the stronger the pull between the two atoms and the shorter the bond length. Generally, the length of the bond between two atoms is approximately the sum of the covalent radii of the two atoms.
When water changes from gas to liquid, the: color of the water remains the same volume of the water remains the same mass of the water remains the same
Answer:
color of water remains same
Which illustration represents a sound wave?
A or B
no link or i will report,plz help this is a test
Metal M has only one oxidation state and forms a compound with the formula MHCO3. Which formula is correct? A.MNO3 b.MNH4 c.M(NO3)2 d.MPO4
Answer:
The compound with the correct formula is;
A. MNO₃
Explanation:
The number of oxidation states in the metal, M = One oxidation state
The formula of the compound formed by the metal, M = MHCO₃
We note that the ion HCO₃⁻, known as hydrogen carbonate has an oxidation number of -1
Similarly nitrate, NO₃⁻ has an oxidation number of -1, therefore, the metal M can form similar compound formed with HCO₃⁻ with nitrate, and we have;
The possible compounds formed by the metal 'M' includes MHCO₃ and MNO₃.
The teacher puts you in charge of measuring the pH of a marked solution of 0.0050 M HCL. What is the pH of this
solution?
HELP PLZZZ!!!
Answer: The pH of given solution is 2.3
Explanation:
It is given that the concentration of HCl solution is 0.005 M.
pH is the negative logarithm of concentration of hydrogen ions.
[tex]pH = -log [H^{+}][/tex]
Substitute values into the above formula as follows.
[tex]pH = -log [H^{+}]\\= - log (0.005)\\= 2.3[/tex]
Thus, we can conclude that the pH of given solution is 2.3
Which of the following contains the most atoms?
2 moles of silver.
1 mole of carbon.
2.5 moles of oxygen.
1.5 moles of iron.
PLEASE HELP! NO LINKS! CHEMISTRY!
Solution A has a pH of 2.0. Solution B has a pH of 5.0. Which solution is more acidic? Based on the H+ ion concentrations in the two solutions, how many times more acidic?
Answer:
Solution A is 1,000 times more acidic than Sol. B
Explanation:
for pH values we use scientific notation:
-log10 c (where c is the hydrogen ion concentration) is used to notate pH value (think of it as a unit)
ie:
10^-2 is sol A 10^-5 is sol B
5-2 is 3
10^-3 = 1000
there's a diff of 1,000 between the solutions.
The acidity or alkalinity of a solution depends on the hydronium ion concentration and hydroxide ion concentration. Here the solution A of pH 2.0 is more acidic than the solution of pH 5.0.
What is pH?The pH of a solution is defined as the negative logarithm to the base 10 of the value of the hydronium ion concentration in moles per litre. When the pH of the solution is less than 7 it is acidic whereas when pH is greater than 7, it will be basic.
The pH of the solution is calculated by the equation:
pH = - log [H₃O⁺]
Then the concentration of H₃O⁺ is:
[H₃O⁺] = 10⁻pH
At pH = 2.0, [H₃O⁺] = 10⁻² = 0.01
At pH = 5.0, [H₃O⁺] = 10⁻⁵ = 0.00001
Thus here the Solution A is 1,000 times more acidic than Solution B.
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Which statements explain the relationship between mass, velocity and kinetic energy? Select the TWO (2) that apply.
Consider the equation to calculate kinetic energy: KE = ½mv2
Kinetic energy decreases if either the mass or the velocity of the object decreases or if both decrease.
Kinetic energy decreases if either the mass or the velocity of the object increases or if both increase.
Kinetic energy increases if either the mass or the velocity of the object decreases or if both decrease.
Kinetic energy increases if either the mass or the velocity of the object increases or if both increase.
Answer:
I think D
Explanation:
Kinetic energy has a direct relationship with mass, meaning as mass increases so does the kinetic Energy of an object.
The only helpful bacterium found in humans is found in the stomach?
Answer:
Possibly Probiotics
they are very helpful to the human gut
Or the most 2 helpful bacteria are Lactobacillus and Bifidobacteria
Explanation:
Why did scientists reject Lamarck’s idea of evolution?
Organisms cannot change their characteristics during their lifetime.
Traits acquired during a lifetime are not passed on to offspring.
Organisms have not changed during Earth’s history.
Traits acquired during a lifetime are of no use to an individual.
Answer:
B
Explanation:
Traits acquired during a lifetime are not passed on to offspring.
Give two examples of an ionic compound. Chemical name and chemical structure.
¿Qué es una fuente de luz primaria?
Answer:
Las fuentes de luz primarias son aquellas que emiten la luz que producen. Por ejemplo: la luz de Sol, un relámpago, la de una vela,...
A su vez las fuentes primarias las podemos clasificar en: fuentes naturales y fuentes artificiales
Explanation:
what mass of oxygen must react in order for 4.25 grams of CO2 to be produced? HELP
A barometer measures the pressure of the atmosphere at different altitudes. Identify the location where the column of mercury is lowest in the barometer.
Answer:
the mercury would be lowest at location 4.
Explanation: this is because pressure and altitudes have inverse relationship at the troposphere. higher altitude has lower pressure. also pressure at location 4 contribute to pressure at location 1. but pressure at location 1 do not contribute to pressure at location 4.
True or False: The moon's gravity affects the oceans nearest the moon because the moon's gravity pulls water into a tidal bulge.
Answer: The moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon. These bulges of water are high tides
Explanation:
The moon's gravity affects the oceans nearest the moon because the moon's gravity pulls water into a tidal bulge is a true statement.
What is tidal force?The tidal force is the result of the moon's gravitational pull.
The tidal force causes Earth—and its water—to bulge out on its closest and furthest sides from the moon. High tides cause these water bulges.
Thus, the statement is correct.
Learn more about tidal effect
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Why are models used to represent atoms?
O A. Atoms are too small to see.
O B. Models are completely accurate.
O C. Models explain new evidence.
O D. Models never change over time.
describe how the intestines, liver, stomach, and pancreas all work together.
extra detail please and no links.
Answer:
Glands in your stomach lining make stomach acid and enzymes that break down food. Muscles of your stomach mix the food with these digestive juices. Your pancreas makes a digestive juice that has enzymes that break down carbohydrates, fats, and proteins, along with your liver that makes a digestive juice called bile, which helps digest fats and some vitamins. The pancreas delivers the digestive juice to the small intestine through small tubes called ducts. Bacteria in your small intestine make some of the enzymes you need to digest carbohydrates. It also absorbs water with other nutrients. Bacteria in your large intestine help break down remaining nutrients and make vitamin K NIH external link. Waste products of digestion, including parts of food that are still too large, become stool.
Some extra info, but the main ones are there for you :)
Explanation:
Mouth. The digestive process starts in your mouth when you chew. Your salivary glands make saliva, a digestive juice, which moistens food so it moves more easily through your esophagus into your stomach. Saliva also has an enzyme that begins to break down starches in your food.
Esophagus. After you swallow, peristalsis pushes the food down your esophagus into your stomach.
Stomach. Glands in your stomach lining make stomach acid and enzymes that break down food. Muscles of your stomach mix the food with these digestive juices.
Pancreas. Your pancreas makes a digestive juice that has enzymes that break down carbohydrates, fats, and proteins. The pancreas delivers the digestive juice to the small intestine through small tubes called ducts.
Liver. Your liver makes a digestive juice called bile that helps digest fats and some vitamins. Bile ducts carry bile from your liver to your gallbladder for storage, or to the small intestine for use.
Gallbladder. Your gallbladder stores bile between meals. When you eat, your gallbladder squeezes bile through the bile ducts into your small intestine.
Small intestine. Your small intestine makes digestive juice, which mixes with bile and pancreatic juice to complete the breakdown of proteins, carbohydrates, and fats. Bacteria in your small intestine make some of the enzymes you need to digest carbohydrates. Your small intestine moves water from your bloodstream into your GI tract to help break down food. Your small intestine also absorbs water with other nutrients.
Large intestine. In your large intestine, more water moves from your GI tract into your bloodstream. Bacteria in your large intestine help break down remaining nutrients and make vitamin K NIH external link. Waste products of digestion, including parts of food that are still too large, become stool.
Glands in your stomach lining make stomach acid and enzymes that break down food. Muscles of your stomach mix the food with these digestive juices. Your pancreas makes a digestive juice that has enzymes that break down carbohydrates, fats, and proteins, along with your liver that makes a digestive juice called bile, which helps digest fats and some vitamins. The pancreas delivers the digestive juice to the small intestine through small tubes called ducts. Bacteria in your small intestine make some of the enzymes you need to digest carbohydrates. It also absorbs water with other nutrients. Bacteria in your large intestine help break down remaining nutrients and make vitamin K NIH external link. Waste products of digestion, including parts of food that are still too large, become stool.
Hope this helps, have a great day/night! :}
An isotope, cesium-137, has a half-life of 30 years. Starting with 40 grams, how much is left in 60 years?
You can use a very simple formula for first order decay...
Fraction Remaining (FR) = 0.5n where n is the number of half lives that have elapsed.
In the current problem we want to find the FR, and we know n = 2 half lives elapsed (60 yr/30yr = 2)
FR = 0.52 = 0.25
Since we started with 5.0 g, and we have 0.25 (1/4) left, that would be 5.0 g x 0.25 = 1.25 g
What is the percent composition by mass of each element in Co(HSO4)2?
Show how you worked out the problem!!!!
______________% Co
_______________% H
----------------------------% O
------------------------------% S
Answer:
CoHOS
Explanation:
______________% Co
_______________% H
----------------------------% O
------------------------------% S
You know im wrong but eh....
how does lactic acid make milk sour?
Answer:
but you should
Explanation:
but you should
Which of the following characteristics can be used to classify an organism into a taxonomic domain? Being heterotrophic or autotrophic O Presence of nucleus in cells Being unicellular or multicellular O Mode of reproduction
Answer:
O Presence of nucleus in cells
Explanation:
A. On what continent would you find each of the following locations?
1. 60°N, 100°W
2. 60°N, 100°E
3. 20°S, 60°W
4. 20°N, 20°E
5. 20°S, 140°E
B. Identify the city that lies closest to each pair of coordinates.
6. 30°N, 90°W
7. 30°N, 30°E
8. 60°N, 30°E
C. Give the coordinates for each city.
9. Shanghai, China
10. Durban, South Africa
D. Identify the city with each pair of coordinates.
11. 0°, 78°W
12. 51°N, 0°
13. 38°S, 145°E
E. Estimate the coordinates for each city to the nearest degree.
14. Nairobi, Kenya
15. New York, New York
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Answer:
Durban, South AfricaExplanation:
please mark as brain and like please
How does water quality affect other aspects of nature?
What does change in different types of milk?
1.
2.
Answer:
the flavour or the taste or the packaging
. Which of the following is not a product of photosynthesis?
O A. Carbon dioxide
O B. Glucose
O C. Oxygen
Answer:
The answer would be a
Explanation:
That is what goes into the plant and oxygen IS an outcome
A sample of gas occupies a volume of 27 mL at a temperature of 161K. What is the volume of the temperature if raised to 343K?
Answer: The volume is 57.52 mL if the temperature if raised to 343K.
Explanation:
Given: [tex]V_{1}[/tex] = 27 mL, [tex]T_{1}[/tex] = 161 K
[tex]V_{2}[/tex] = ?, [tex]T_{2}[/tex] = 343 K
According to Charles law, at constant pressure the volume of an ideal gas is directly proportional to temperature.
Formula used is as follows.
[tex]\frac{V_{1}}{T_{1}} = \frac{V_{2}}{T_{2}}\\\frac{27 mL}{161 K} = \frac{V_{2}}{343 K}\\V_{2} = 57.52 mL[/tex]
Thus, we can conclude that volume is 57.52 mL if the temperature if raised to 343K.