Answer:
Heat transfer is related to temperature change.
Explanation:
What is the risk in filling chemical waste containers past the recommended level?.
Answer:
Overflowing waste containers can lead to drips of potentially hazardous chemicals down the sides. Chemicals and their vapors need room to expand in case of increased temperatures.
NAME DATE BELL GAS PROBLEMS VLAR VOLUME PROBLEMS 1. A sample of gas contains 4.52 moles at STP. What volume would this occupy? 2. If you have 76.9 g of NO2, whal volume would this occupy at STP? 3. A sample of O2 gas occuples 4.6 L at STP. How many atoms are in the sample? 4. A sample of gas has a volume of 39.4 L at STP. How many moles is this? GAS LAWS 5. A gas has a volume of 225 L at STP. Assuming there is no change in pressure, what volume will the gas have if the temperature increases to 75º C? 6. A gas has a volume of 420 L at STP. Assuming there is no pressure change, what volum a will the gas occupy if the volume changes to 350 L?
Answer:
See attached image. The last problem was a challenge, but I can guarantee that it is the teacher's fault if I'm not correct.
Explanation:
On the attachment. Remember that all gasses occupy 22.4 liters at STP. It is a good constant to memorize. It often comes up in chemical calculations, and you can also use it at parties if you want to annoy anyone. Also, depend on the units to help you decide how to do a calculation. moles/liter or liters/mole: it makes a difference in whether you multiply or divide. Use the operation that cancels the units you don't want and leaves the target unit.
5 points
12. How many liters of a 4.2 Molar solution of NaCl are needed to make
352 grams of AICI3? *
O A. 0.186 liters
B. 1.86 liters
C. 18.6 liters
D. 352 liters
Moles of AlCl_3
[tex]\\ \tt\hookrightarrow \dfrac{352}{133}=2.64mol[/tex]
Now
Molarity=Moles of solute/Volume of solution in L[tex]\\ \tt\hookrightarrow 4.2=\dfrac{2.64}{V}[/tex]
[tex]\\ \tt\hookrightarrow V=0.62L[/tex]
There is a group of 10 people who are ordering pizza. If each person gets 2 slices and each pizza has 4 slices, how many pizzas should they order? *
Ammonia, NH3, is made in the direct reaction between nitrogen and hydrogen. If 280. grams of nitrogen are used,
how many grams of hydrogen are also used?
Answer:
The answer is 60 grams of hydrogen.
Explanation:
Assuming hydrogen is a non-limited substance, we can calculate the number of mols of nitrogen that are used.
Molar mass of N = 14 grams/mole
280g of N / (14 g / mol) = 20 mols of N
They react in a 1 to 3 ratio. For every 1 nitrogen atom, there are 3 hydrogen atoms.
The molar mass of hydrogen is 1 g / mol.
Because we have 20 mols of Nitrogen and we know we need three times the amount of hydrogen as we do nitrogen, there must be 60 mols of hydrogen.
60 * 1 = 60
The answer is 60 grams of hydrogen.
Organic molecules are defined as chemical compounds that contain.
Organic molecules can be defined as carbon-containing molecules found in living things.
What are organic molecules?They are chemical compounds that are mainly made up of carbon atoms.
Characteristics of organic moleculesThey derive their three-dimensional configurations primarily from their carbon skeletons.A major function of these molecules in living systems is to form the structural components of cells and tissues.Therefore, we can conclude that the organic molecules are those that come from living beings, that is, they are compounds of biological origin, which contain carbon.
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What lens could get dirty with oil if you move the revolving nosepiece in the wrong direction after viewing under oil immersion?.
From what we know, we can confirm that doing this may dirty and cause harm to your 40x lens.
Why would this cause harm to your lens?Oil immersion is a technique that can be quite handy when attempting to view hard-to-see specimens. However, This should be done only with lenses that are made specifically for this, so revolving the nosepiece in the wrong direction will expose the 40x lens to the oil, for which it is not designed, and may cause harm to the equipment.
Therefore, we can confirm that the 40x lens could get dirty with oil if you move the revolving nosepiece in the wrong direction after viewing it under oil immersion.
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Pressure is caused by __________ within the container.
comman factors that can lead to high blood pressure include.
0. 75 moles of hf and 1. 00 mole of naf were added to 1. 00 l of water. To this solution was added 0. 200 mol of naoh. What was the final ph of the solution?.
Which of these is an example of Kinetic energy?
Group of answer choices
Elastic Energy
Potential Energy
Thermal Energy
Chemical Energy
Answer:
thermal energy is your correct answer mark me brainly
What is redox in terms of electrons? Give an example.
Do you think we can use flame tests to identify unknown metals in a mixture?
Flame tests are used to identify the presence of a relatively small number of metal ions in a compound. Not all metal ions give flame colors. For Group 1 compounds, flame tests are usually by far the easiest way of identifying which metal you have got.
Oxygen and chlorine gas are mixed in a container with partial pressures 5 points
of 601 mmHg and 0.739 atm, respectively. What is the total pressure inside
the container (in atm)?
Answer:
o.99
Explanation:
Is satellite travels in a circle at 100 m/s. Compare satellite speed and velocity.
Explanation:
Speed is scalar and velocity is vector.
The speed of satellite is fixed as size 100m/s but
the velocity will be changed per second because satellite moves in a circle and its direction changes correspondingly.
1. Do you think that Tyrone Briggs might be a victim of false identification? Why or why not?
2. What factors are present that make the witnesses reliable?
3. What factors are present that make the witnesses unreliable?
This is a scenario which happens when someone incorrectly thinks that they have found or recognized a particular person.
In the case of Tyron Briggs he may have been falsely identified as a result of lack of substantial evidence pinning him to the crimes.
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What would happen if the amount of sodium azide used was far greater or far less thanIts 1424 grams of sodium azide which is required to produce 736 L of Nitrogen gas with the density of 1.25 g/LIts
Based on the stoichiometry of the reaction, If the mass of sodium azide used was far greater than 1424 g, the volume of nitrogen gas produced will be far greater than 736 L.
However, If the mass of sodium azide used was far less than 1424 g, the volume of nitrogen gas produced will be far less than 736 L.
What is sodium azide used for?Sodium azide is the chemical found in automobile airbags.
Automotive air bags inflate when an electrical charge triggered by automobile impact causes sodium azide, NaN3, to rapidly decompose to its component elements, nitrogen gas and sodium
The equation of the reaction is given below:
2 NaN3(s) → 2 Na(s) + 3 N2(g)According to the equation of reaction, 2 moles of sodium azide produces 3 moles of nitrogen gas.
1 mole of Nitrogen gas has a volume of 22.4 L
Molar mass of sodium azide is 65 g
Moles of sodium azide in 1424 g = 1424/65 = 21.9077 moles
21.9077 moles of sodium azide will produce 21.9077 * 3/2 moles of nitrogen gas = 32.86 moles of nitrogen gas
32.86 moles of nitrogen gas will occupy a volume of 32.86 * 22.4 = 736 L
If the mass of sodium azide used was far greater than 1424 g, the volume of nitrogen gas produced will be far greater than 736 L.
If the mass of sodium azide used was far less than 1424 g, the volume of nitrogen gas produced will be far less than 736 L.
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By definition, what type of fatty acid has double bonds?.
Answer:
Fatty acids are comprised of hydrocarbon chains terminating with carboxylic acid groups. Fatty acids and their associated derivatives are the primary components of lipids. The length and degree of saturation of the hydrocarbon chain is highly variable between each fatty acid, and dictates the associated physical properties (e.g., melting point and fluidity). Moreover, fatty acids are responsible for the hydrophobic properties (insoluble in water) exhibited by lipids.
Function of Fatty Acids
Explanation:
The type of fatty acids that have double bonds is unsaturated fatty acids.
What are unsaturated fatty acids?
Unsaturated fat is a fatty acid containing two carbons that share a double or triple bond and are not entirely saturated with hydrogen atoms. The structures are weaker and often liquid (oil) at room temperature as a result of the lower hydrogen-bond saturation.
Vegetables and fish are more likely to contain unsaturated fats than other foods. In contrast, saturated fats are solid at room temperature and are often present in animal products.
The human body relies on unsaturated fats as a major source of calories and, consequently, energy. Fats are the most concentrated source of energy in food and are typically composed of carbon, hydrogen, and oxygen.
The three primary nutrients in a diet are carbohydrates, proteins, and fats. According to how many hydrogen bonds they contain, fats are classified as either saturated (all hydrogen bonds) or unsaturated (not all hydrogen bonds).
Therefore, unsaturated fatty acids have double bonds.
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How many valence electrons do the noble gases possess?.
Answer:
8, they have a full valence shell
Explanation:
Which statement describes chromosomes? 27 points
coiled threads of DNA
a spiral molecule
simple chemicals which link the strands
none of the above
Answer:
coiled threads of DNA
Explanation:
Chromosomes are long stretches of DNA packed together by proteins.
is the release of CO2 proof for a chemical reaction?
Collisions covalent bonding level 16!!!
Answer:
Group 16 elements tend to form two covalent bonds because they have six valence electrons and need two more to have eight. Oxygen is a group 16 element, and it can gain the same electron configuration as neon if it makes two covalent bonds. It tends to form either two single covalent bonds or one double covalent bond.
PLEASE HELP FAST !
Calculate the mass in grams of each of the following . 2.0•10^23 gold atoms 1.5•10^23 lead atoms 7.9•10^21 uranium atoms
Answer:
2.0 x 10²³ atoms Au = 65.4g
1.5 x 10²³ atoms Pb = 51.6g
7.9 x 10²¹ atoms U = 3.1g
Explanation:
We want to convert each to grams.
We can use dimensional analysis to do so.
Kindly view the attached image for work.
1.) 2.0 x 10²³ atoms Au
Needed conversions:
1 mole = 6.022 x 10²³ atoms 1 mole of Au = 196.966gMath: (2.0x10²³atoms)/(6.022x10²³atoms) x 196.966g = 65.4g
2.) 1.5 x 10²³ atoms lead
Needed conversions:
1 mole = 6.022 x 10²³1 mole Au = 207.2gMath: (1.5x10²³atoms)/(6.022x10²³atoms) x 207.2g = 51.6g
3.) 7.9 x 10²¹ atoms U
Needed conversions:
1 mole = 6.022 x 10²³ atoms1 mole = 238.029gMath: (7.9x10²¹atoms)/(6.022x10²³atoms) x 238.029g = 3.1g
how many atoms of hydrogen does 6CO2 + 6H2O have
Answer:
There are 12 atoms of hydrogen.
Explanation:
In 6H₂O there are 6 molecules of water. It has 2 hydrogens in each one. You multiply 2 by 6 and get 12 atoms of hydrogen in total.
Explain the difference between filtration and decantation.
Answer: Filtration: Method and Examples. Filtration can be described as an act or process of filtering or cleaning something.
Decantation: Method and Examples.
Summary of the difference between Filtration and Decantation: Filtration uses multiple surfaces to filter a substance while decantation doesn’t use a medium, especially a multiple-layered one.
Explanation: I hope this helps you im sorry you had to wait long
What is the volume of a solution that has a specific gravity of 1. 2 and a mass of 185g.
Do humans depend on photosynthesis? Explain how, why, or why not. (1 point)
Yes, but only those humans that avoid meat depend on plants that produce their own food through photosynthesis.
Yes, but only those humans that avoid meat depend on plants that produce their own food through photosynthesis.
No, humans cannot make food by photosynthesis, so they do not depend on photosynthesis for energy.
No, humans cannot make food by photosynthesis, so they do not depend on photosynthesis for energy.
Yes, all of the food consumed by humans is plants or gets energy from plants, and plants produce their own food through photosynthesis.
Yes, all of the food consumed by humans is plants or gets energy from plants, and plants produce their own food through photosynthesis.
No, humans rely on animals for food, and neither humans nor animals depend on photosynthesis for food.
No, humans rely on animals for food, and neither humans nor animals depend on photosynthesis for food.
Answer:
Third option
Explanation:
The answer is the third option or "Yes, all of the food consumed by humans is plants or gets energy from plants, and plants produce their own food through photosynthesis." Photosynthesis is the process plants use to obtain their own food. Humans do depend on photosynthesis because not only humans eat plants, but animals. Some animals are herbivores which means they only eat plants. If plants cannot create their own food using photosynthesis, then the plant dies. Neither the human nor the animal can eat that plant.
Many animals rely on plants to eat and if all plants cannot perform photosynthesis, then the animals cannot eat. Us humans eat animals which means if the plants die, the animals who eat the plants die, and then humans die. Humans heavily rely on photosynthesis, so the answer is the third option.
Hope this helps.
Yes, all of the food consumed by humans is plants or gets energy from plants, and plants produce their own food through photosynthesis. Therefore, the correct option is option C.
The light-dependent processes and the light-independent reactions, also referred to as the Calvin cycle, are the two primary stages of photosynthesis. The thylakoid membrane of the chloroplasts in plant cells is where the first stage, the light-dependent processes, take place. In this phase, the pigments chlorophyll and other chloroplast-based pigments absorb solar energy and transform it into chemical energy in the form of ATP and NADPH (nicotinamide adenine dinucleotide phosphate). These chemicals are necessary to drive the following phase of photosynthesis.
Therefore, the correct option is option C.
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Photosynthesis is the reaction by which green plants convert water and carbon dioxide into glucose and oxygen using sunlight (radiant energy).
The chemical equation for photosynthesis is below.
6CO2 + 6H2O + sunlight energy ——> C6H1206 + 602
What evidence can you provide that shows photosynthesis is an endothermic reaction?
Answer:
Photosynthesis is considered an endothermic reaction, because during the process of photosynthesis, energy from the sun or sunlight is being absorbed.
Explanation:
Any chemical reactions that absorb heat energy from the surroundings to form products is termed the endothermic reaction.
Martin works in a crime lab, and his job is to create the finished sketches of each crime scene. What does his job MOST likely entail?
A. He uses computer programs to create a detailed representation of the scene,
B. He takes video of every crime scene and turns the video into a drawing
C. He takes a rough sketch and uses his own artistic skill to draw it more clearly
D. He interviews witnesses to make sketches of possible suspects in a crime.
Answer:
C. He takes a rough sketch and uses his own artistic skill to draw it more clearly
Martin works in a crime lab, and his job is to create the finished sketches of each crime scene. So, He uses computer programs to create a detailed representation of the scene, which is option A.
Martin's job as a crime scene sketch artist most likely entails using specialized computer programs to create detailed and accurate representations of the crime scenes. These programs allow him to accurately depict the dimensions, measurements, and key features of the crime scene. It provides a more precise and professional output compared to traditional hand-drawn sketches. The correct answer is option A.
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Please helppp me with this question. The question is in the pic that I have uploaded.
What’s are the 3 general functions of the nervous system
Answer:
sensory input, integration, and motor output.
Explanation:
The nervous system has three overlapping functions based on sensory input, integration, and motor output. At a more integrative level, the primary function of the nervous system is to control and communicate information throughout the body.