Answer:
24.3
Explanation:
Two containers of gas have the same volume, temperature and pressure. One container has a sample of oxygen gas having a mass of 3.95g. The other container has a gas with a mass of 2.99g. Determine the molar mass of the gas in the second container.
O2 has a molar mass of 16 X 2 =32
the number of moles for O2 is the weight divided by the molar mass or, but since the two container have the same P,V, AND T they have the same number of moles since
PV =nRT
SO
the weight of the gas in the second container divided by its molar mass =
0.123
or
2.99/? = 0.123
so
? = 2.99/o.123 = 24.3
Can som one pls do this for me easy 50 pointssssssssss
animal: Southwestern Sea Otter
What are the threats to the survival of this species in the United States?
What, if anything, has been proposed to save the species?
What role does the species play in its environment?
If the species disappeared, what effect might it have on the environment?
How much, if anything, is being spent on conservation efforts in the United States for the species?
someone pls just answer the questions and put them on the answer box
Answer:
1. southwestern sea otters include entrapment or entanglement in fishing gear, oil spills, and climate change.
2. Reduce, reuse, and recycle whenever you can.
Dispose of hazardous wastes properly.
Grow a garden. The roots take in water, reducing the amount of runoff.
Use nontoxic household cleaning products.
Don’t litter or dump materials into storm drains.
Pick up after your pets.
Use less water.
Purchase sustainable, recycled, biodegradable goods.
Volunteer to help or create a beach clean up.
Get your car oil changed to prevent leaks.
Donate to the California Sea Otter Fund.
Learn more about ocean issues and share your knowledge!
3. They eat sea urchins and other invertebrates that graze on giant kelp. Without sea otters, these grazing animals can destroy kelp forests and consequently the wide diversity of animals that depend upon kelp habitat for survival.
4. sea otters are critical to maintaining the balance of nearshore ecosystems, such as kelp forests, embayments and estuaries. Without sea otters, sea urchins can overpopulate the sea floor and devour the kelp forests that provide cover and food for many other marine animals.
5. haven’t found anything on that
Answer:
Threats to southern sea otters includes: 1.entrapment or entanglement in fishing gear, 2.oil spills, and climate change
Yeah something has been proposed to save the species which are:
1.Reduce, reuse, and recycle whenever you can.
2.Dispose of hazardous wastes properly.
3.Use nontoxic household cleaning products.
4.Don't litter or dump materials into storm drains
5.Purchase sustainable, recycled, biodegradable goods.
6. Range expansion is key to southern sea otter recovery and to the restoration of ecosystems in which sea otters were once the keystone species.
Southern sea otters play a critical role as a keystone species.
Without sea otters, sea urchins can overpopulate the sea floor and devour the kelp forests that provide cover and food for many other marine animals. Sea otters help ecosystems capture carbon from the atmosphere and store it as biomass and deep-sea detritus, preventing it from being converted back to carbon dioxide and contributing to climate change.
Sea Otter Fund: $3 Million and Counting
Hope this helps pls mark me Branliest
write the steps you would use for making tea. use the words solution, solvent, dissolve, soluble, insoluble, filtrate and Residue.
[tex] \large \text{Answer} \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ [/tex]
take a few cups of water in a pan and and heat it on a gas burner . the hot water , add some dark brown mixture . then add sugar and milk. sugar is a solute which dissolves in hot water to form a solution . after boiling put some more time , mixture is filtered through a tea - strainer . the prepared tea passes through the tiny holes of the tea - strainer and collects as of filtrate in the cup placed below. the used tea - leaves , being isoluble , collect as a Residue in the the tea - strainer .
〽hope it helps you ✅
2AlCl3 --> 2Al + 3Al2
If you produce 15 moles of Al, how many grams of AlCl3 decomposed?
Answer:
1597,5 gm AlCl3 decomposed
Explanation:
2AlCl3 --> 2Al + 3Al2 If you produce 15 moles of Al, how many grams of AlCl3 decomposed?
FIRST, you need to write down the the correct reaction. Your equation makes no sense
here is the correct question
2AlCl3 --> 2Al + 3Cl2 If you produce 15 moles of Al, how many grams of AlCl3 decomposed?
for every mole of Al produced, we decomposed a mole of AlCl3
so we produced 15 moles of Al, so we decomposed 15 moles of AlCl3
15 moles are 15 X 106.5 = 1597,5 gm AlCl3 decomposed
With which instrument can you measure the mass of a solid?
You can use Balances and Scales..
Study the chemical equation.
Na + Cl2 → NaCl
Is the chemical equation properly balanced?
explain why it is necessary to change models as new information becomes available.
Answer:
Scientific models are not a replacement for experimentation. They can be used in conjunction with experimentation to further understanding of a concept, event, or process. They are based on current scientific knowledge and may have to be changed when new discoveries are made.
Explanation:
that's my answer
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In an AP Chemistry laboratory, students were given two unlabeled beakers and told that one of the beakers contained 1.0g of solid CaCO3 and the other contained
1.0g of solid AgNO3. They were told to devise an experiment to identify which compound was which. A student did so by adding 50 mL of distilled water to each beaker. Describe the student's observations that allowed him to identify each compound.
When the student adds 50 mL of distilled water to each beaker, CaCO3 will not dissolve in water while AgNO3 will dissolve completely in water.
We have to recall that according to the solubility rules, the carbonates of group two elements are insoluble in water. The solubility rules offer a convenient way of predicting the solubility of a compound in water.
When the student adds 50 mL of distilled water to each beaker, CaCO3 will not dissolve in water while AgNO3 will dissolve completely in water. This is because, the carbonates of group two elements are insoluble in water.
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help me please?????
1. What is the specific heat of a substance that requires 270 J of energy to raise the temperature of 4.2 grams by 25°C?
Heat required is mcΔT=100×0.39×50=1950 J
Solve any question of Thermodynamics with:-
The specific heat of the substance that requires 270 J of energy to raise the temperature is 2.57 J/g⁰C.
Specific heat capacity of the substanceThe specific heat capacity of the substance is calculated as follows;
Q = mcΔФ
where;
c is the specific heat capacityc = Q/mΔФ
c = (270) / (4.2 x 25)
c = 2.57 J/g⁰C
Thus, the specific heat of the substance that requires 270 J of energy to raise the temperature is 2.57 J/g⁰C.
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CORRECT ANSWER WILL BE MARKED BRAINIEST
predict the chemical formula that results when the following pairs of ions combine to form an ionic bond.
1. K+1 and S-2
2. Pb+4 and N-3
The missing box would be the number and this is a form of decay.
please help mark brainliest
Answer:
alpha decay or particle
Explanation:
A student graphed the position of a cart during a 7-second time interval.
Which statement best describes the cart?
A.
The cart was stationary except for a short burst of acceleration of 0.5 m/s².
B.
The cart accelerated at a constant rate of approximately 0.8 m/s².
C.
The cart was stationary with a velocity of 0 m/s for the entire 7 seconds.
D.
The cart moved at a constant velocity of 0.5 m/s for the entire 7 seconds.
The cart accelerated at a constant rate of approximately 0.8 m/s². Option (B) is correct.
Option B is the best description based on the graphed position data during the 7-second time interval. The cart's acceleration can be determined by analyzing the shape of the position-time graph.
If the cart was stationary, the position-time graph would be a horizontal line (option C). If the cart moved at a constant velocity, the graph would be a straight line inclined at a constant angle (option D).
However, the graph likely shows a curved line, indicating changing position over time. This suggests that the cart experienced acceleration. To further confirm, calculate the acceleration:
Acceleration (a) = Δv / Δt,
where Δv is the change in velocity and Δt is the change in time.
Given the time interval is 7 seconds, and the initial and final velocities are likely different, you can calculate the average acceleration. If the average acceleration is approximately 0.8 m/s², then option B is correct.
The graphed data aligns with the scenario of constant acceleration, supporting option B.
To learn more about acceleration here
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Who was the first person to introduce the concept of atomic mass?
things which are matter but not substance
Answer:
Vacuum
Explanation:
It may be bounded by a volume. Energy: Light, heat, kinetic and potential energy, and sound are non-matter because they are massless. Objects that have mass and are matter may emit energy.
Write a balanced chemical equation for the standard formation reaction of gaseous hydrogen bromide (hbr)
[tex]\\ \sf\longmapsto H_2+Br_2\longrightarrow HBr[/tex]
Balanced equation[tex]\\ \sf\longmapsto H_2+Br_2\longrightarrow 2HBr[/tex]
On reactant side:-
H=2Br=2On products side
H=2Br=2The balanced chemical equation for the synthesis of hydrogen bromide is [tex]\rm H_2\;+\;Br_2\;\rightarrow\;2\;HBr[/tex].
What is a balanced chemical equation?The balanced chemical equation has been given as the reaction in which the number of atoms for each element on the product and the reactant side is equal.
The HBr has been formed with the reaction of the hydrogen and the bromine. The balanced chemical equation for the reaction has been:
[tex]\rm H_2\;+\;Br_2\;\rightarrow\;2\;HBr[/tex]
Learn more about the balanced chemical equations, here;
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What can you put in a turkey cavity instead of stuffing
Answer:
The secret to adding extra flavor to your Thanksgiving turkey is to season it liberally. To make sure that your favorite herbs permeate every bit of your bird, stuff a small bundle into the turkey cavity. Thyme, sage, parsley and a bit of rosemary are a great combination—but feel free to customize to your taste.
how many electrons does hydrogen need in order to have a full shell of valence electrons?
Answer:
One
Explanation:
In a hydrogen atom, the first outer shell only consists of two valence electrons, because it would already have one, the atom only needs one more.
It requires two electrons to completely occupy its outer shell, it frequently forms a single covalent bond with another atom. Because of this configuration, hydrogen can gain access to two electrons and completely occupy its valence shell.
What is Hydrogen?Hydrogen adheres to the duet rule because it only requires two electrons to completely occupy its valence shell. It deviates from the octet rule. Hydrogen only needs to form one bond. Because of this, H is always a terminal atom and never a central atom. Hydrogen is a chemical element with the symbol H and the atomic number 1.Hydrogen is the lightest element. Under normal conditions, hydrogen is a gas of diatomic molecules with the formula H2. It is colorless, odourless, tasteless, non-toxic, and extremely flammable. Hydrogen is a more environmentally friendly alternative to methane, also known as natural gas. It is the most abundant chemical element, accounting for 75% of the universe's mass. Water, plants, animals, and, of course, humans contain massive amounts of hydrogen atoms.To learn more about valence electron refer to:
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what is the mass of the ice (in kg) composing the iceberg?
Answer:
picture pls
Explanation:
how many core electrons are there in a sodium atom?
Answer:
There are 13 core electrons in a sodium atom.
Which of the following typically increases the rate of a chemical reaction? А avoiding the use of a catalyst B heating the reaction C increasing the volume of the reaction vessel D decreasing the concentration of the reactants
B: heating the reaction
hope i could help :D
What type of flower structures do you see in a ovary in a flower
Answer:
The ovary contains ovules
Explanation:
the atom is one of the basic units of matter. which part of the atom mostly determines the size of the atom?
Answer:
nucleus
Explanation:
The nucleus contains the majority of an atom's mass because protons and neutrons are much heavier than electrons, whereas electrons occupy almost all of an atom's volume
how many moles of iron are present in 3.15 × 10^24 atoms of iron?
Answer:
5.23 moles
Explanation:
How many moles of iron are present in 3.15 × 10^24 atoms of iron?
1 mole has 6.02 X 10^23 particles
so
3.15X10^ 24 atoms =( 3.15 X 10^24)/(6.02 X 10^23) =(3.15/6.02 )X 10 =
5.23 moles
Describe how the temperature change suggests a chemical change occurred?
NO LINKS PLEASE
Answer:
When energy is either absorbed or released, it is indicative of a chemical change. Fireworks are an example of a chemical change that produces a temperature change and emits light.
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Answer:
okay?
Explanation:
Answer:
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the electron configuration of an element describes _____.
Answer:
here
Explanation:
This is the electron configuration of the element carbon.
What does percent composition tell you about a molecule?
O A. It tells you the ratio of elements in the molecular formula.
OB. It gives you the total number of atoms in the molecule.
C. It tells you how much of a molecule is made up of each element.
O D. It tells you how the elements are arranged in the molecule.
Answer:
C
Explanation:
when does cells breakdown a sugar molecule completely to produce chemical energy ATP the cells need to the following materials
Answer:
sugar and carbon dioxide
Explanation:
Chemical energy is stored in the bonds of sugars. When the bonds of a sugar molecule are broken, a burst of energy is released that the cell can use. Cells can release energy in two basic processes: cellular respiration and fermentation. Cellular respiration requires oxygen, but fermenta- tion does not.
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What is Art Conservation?
Answer:
The conservation and restoration of cultural property focuses on protection and care of cultural property, including artworks, architecture, archaeology, and museum collections. Conservation activities include preventive conservation, examination, documentation, research, treatment, and education
Explanation:
this is the correct answer
What is the word equation for Sodium Hypochlorite?
Answer:
Can u phrase differently?
Answer:
If you are looking for the formula, then it is NaOCl
Explanation: