Answer:
pV= nRT
Explanation:
(p1 × V1)/ T1/ (p2 × V2)/ T2
Why do some cells make food molecules?
Answer:
All living cells release energy from food molecules through cellular breathing and/or fermentation. Some cells make food molecules using light energy through the process of (making food from light).
Making food from light- Photosynthesis
Breathing- Respiration
All living units give out power for a given time from food small complex units through formed of small units breathing and or fermentation. Some units make food small complex units using light power for a given time through the process of (making food from light).
Why is the earth so round
Answer:
Cause why not?
Explanation:
What is the phase of water at 0.25 atm and 0°C?
How can we prevent coral reefs from dying in the first place?
Explanation:
1. Reduce your carbon footprint
Carbon emissions also increase ocean acidity, which can impact corals and the species that depend on them.
Walking, biking, riding public transportation and carpooling are all ways you can reduce your carbon footprint
2. Conserve water to reduce pollution
All water winds up in the ocean, and pollution drives much of the damage to reefs. And runoff is what carries nutrients and contaminants into the sea.
Using less water can help minimize these impacts.
3. Get engaged
Through civic and political engagement, you can help shape your community in ways that reduce negative impacts on coral reefs. Volunteering, voting and running for public office are all ways you can become more engaged and magnify your impact on a wide range of issues.
4. Support sustainable fishing
Overfishing has a dramatic impact on coral reefs. By making informed choices about the fish you purchase and eat, you can contribute greatly to ocean health.
5. Support sustainable development and tourism
By doing research, speaking out and making informed choices when you visit tropical reefs, you can make a big impact
6. Help inform the public
Educating others about the crisis facing coral reefs is a vital part of building support, engagement and the political will to fight the human-caused pressures that are devastating reef ecosystems.
What is the entropy of a solid based on?
A. The conductivity of the atoms
B. The arrangement of the atoms
O C. The atomic radii of the atoms
O D. The electronegativity of the atoms
ANSWER FAST PLS
it is for science class please help answer the questions and fast . I will
mark brainliest but it has to be right.
How many moles of gas will occupy a volume of 2.5 l at 12.0 atm and 25c?
Answer:
1.23 moles
Explanation:
Ideal gas law
PV = n RT R = .082057 L-atm/mol-K
25 C = 298.15 K
12 (2.5) = n (.082057) (298.15) n = 1.23 moles
How many moles of H2O are in 35 grams of H2O?
Answer:
1.94 Moles H2O
Explanation:
1 grams Water to mol = 0.05551 mol
so 35 x 0.05551 = 1.9427952271627198, which rounds to 1.94 moles
How is knowing conduction of heat useful to us? Explain in your own words please xx
There are a lot you want to know about heat transfer.
If u understand the mode of heat transfer well, then heat transfer is easy to continue.
Answer:
1: They give to the body Vitamin D 2: they give solar energy and that is what gives us revaluation around the sun (Drag) 3: it gives plants energy for photosynthesis (or dont know)
4:solar panels gives energy by the sun radio controlled area that gives us the battery's, lights etc...
Explanation:
EXPLAIN IT
find the molarity of 4.9 g of h2so4 in 400 ml solution
The molarity of a solution that contains 4.9 g of [tex]H_2SO_4[/tex] in 400 ml of solution would be 0.12465 M
Define molarity of a solution.
Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.
Mathematically,
[tex]Molality = \frac{Moles \;solute}{olume \;of \;solution \;in \;litre}[/tex]
Mole of 4.9 g [tex]H_2SO_4[/tex]
= [tex]\frac{mass}{molar \;mass}[/tex]
= [tex]\frac{4.9 g}{98.08}[/tex]
= 0.0499
[tex]Molality = \frac{Moles \;solute}{ olume \;of \;solution \;in \;litre}[/tex]
[tex]Molality = \frac{ 0.0499}{0.4}[/tex]
= 0.12465 M
Hence, the molarity of a solution that contains 4.9 g of [tex]H_2SO_4[/tex] in 400 ml of solution would be 0.12465 M.
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Describe the problem you have chosen to investigate. Plan your investigation and write out the steps in your procedure. Include a sketch of your set up. Explain how this procedure and set-up will help you investigate the problem.
Answer:
Answer both asap for brainliest
Carry out your experiment. Present evidence that you have carried out the experiment below. You may upload photos as evidence. Record your data in a chart. Be sure you have starting data and several data points. Analyze your results. You may want to present your data as a graph. Did the investigation you planned determine the relationships among temperature, the energy transferred, the type of matter, the mass, and the change in the average kinetic energy of the particles as measured by the temperature of the sample? How do you know? Use complete sentences and paragraph form for your analysis.
Answer:
Six step guide to help you solve problems
Step 1: Identify and define the problem. State the problem as clearly as possible. ...
Step 2: Generate possible solutions. ...
Step 3: Evaluate alternatives. ...
Step 4: Decide on a solution. ...
Step 5: Implement the solution. ...
Step 6: Evaluate the outcome
A) 4520 kj
B) 1794 kj
C) 800 kj
D) 2200 kj
Answer:
D.) 2,200 kJ
Explanation:
To find the energy needed to vaporize aluminum, you need to multiply the given mass (2 kg) by the latent heat of vaporization conversion (via table). You know your answer is correct if the units cancel out.
2 kg aluminum 1,100 kJ
------------------------- x ------------------------ = 2,200 kJ
1 kg aluminum
**I apologize if there was another way using the equation **
- What mass of sulfur trioxide is formed and what is the limiting reactant? Please show all of your calculations so I can understand, please and thank you?
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Which of the following is not a type of energy
A. Heat from an oven.
B. Electricity in a power cord.
C. Light from a lightbulb.
D. Smoke from a fire.
Answer:
smoke from a fire Is not an example of energy
How many grams of NH4NO3 are required to produce 4.29 g of N2O?
Answer:
To produce 1 mole of N2O required 1 mole of NH4NO3 . Hence, 60 grams of NH4NO3 are required to produce 33.0 g N2O
Explanation:
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WITHIN THE HOUR
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Answer:
A. O, S, Se
Explanation:
They are all considered "other nonmetals," found in row 16 of the periodic table, and are chalcogens. The other options don't have as much in common.
Which of the following is true of folded mountains, fault-block mountains, and volcanic mountains?
Form from the buildup of lava and ash
Form only at boundaries between two oceanic plates
Form only at boundaries between two continental plates
Form at both convergent and divergent plate boundaries
Answer:
Here are the following answers to the five questions:
(1) "Form only at boundaries between two continental plates."
(2) "A fault-block mountain"
(3) "Island arcs form when hot, fluid rock rises through thin spots in Earth's crust, whereas hotspot volcanoes form when two oceanic plate boundaries push against each other until subduction happens and the plates partially melt."
(4) "The fault plane runs from the top of the rock to the bottom of the rock at an angle greater than 45 degrees."
(5) "Segments of Earth's crust bent and doubled over, and moving wind and water gradually shaped the rock into gently sloping domes."
Explanation:
A helium balloon with an internal pressure of 1.00 atm and a volume of 4.50 L at 20.0˚C is released. What volume will the balloon occupy at an altitude where the pressure is 0.600 atm and the temperature is –20.0˚C?
GAS LAW:
Given:
Unknown:
Formula:
Solution:
FInal Answer: V2 =
Soil is conserved from erosion to
Answer:
keep it from being washed away by water
3 Apply Many scientific words, such as matter, also have everyday meanings. Use context clues to write your own definition for each meaning of the word matter.
Example sentence
What is this gooey matter on the table?
Matter:
__________
Example sentence
Please vote! Your opinions matter.
Matter:
__________
Answer:
Explanation:
Use context clues to write your own definition for each meaning of the word matter.
Example sentence
What is this gooey matter on the table?
Matter:
__________
Example sentence
Please vote! Your opinions matter.
Matter:
__________
PLEASE HELP!!! HOW DO I DO THIS??
What is the Ka of a weak acid with a molarity of 0.333 and a pH of 4.6?
WILL GIVE BRAINLIEST! Please help me because I am unable to find help and I have to turn in this assignment or else I will fail this class for the year. I AM NOT ACCEPTING FILES!!
The statement about the number of moles of acid and base being the same is true in the neutralisation reaction between the acid HCl and base NaOH.
What is neutralisation reaction?A neutralisation reaction is the type of chemical reaction whereby an acid reacts with a base to form salt and water.
HCl + NaOH --------> NaCl + H2O
In the neutralisation reaction, between the acid HCl and base NaOH above, the balanced chemical equation showed that the initial number of moles of acid is equal to the final amount of the number of moles of known base which is NaOH.
Therefore, the statement about the number of moles of acid and base being the same is possible in the neutralisation reaction between the acid HCl and base NaOH.
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Which of the following is true about processes that shape the Earth?
Some processes that shape the Earth are happening so slowly they cannot be easily detected in a human's lifetime.
What is the Earth?This is the third planet from the Sun and is characterized by its plants and animal life.
This planet have some processes which occur slowly and aren't easily detected unlike the rapid ones.
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How does the number of reactants in a double-displacement reaction
compare with the number of products?
Weather is influenced by global patterns of atmospheric movement. Winds and
ocean currents are evidence for the process of
Winds and ocean currents are evidence for the process of regulating and stabilizing the climate patterns.
What are winds and ocean currents?Ocean current is the flow or movement of water in a direction by gravity, wind, and difference in density of the water.
Wind currents pull water and create ocean currents. The current flow to westwards, which is called Coriolis effect.
Thus, Winds and ocean currents are evidence for the process of regulating and stabilizing the climate patterns.
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Draw a complete enthalpy diagram for the following reaction: 4Na(s) + O2(g) → 2Na2O(s). H=-178kJ
The enthalpy change of the given reaction is negative, so the reaction is an exothermic reaction.
What is enthalpy change of a reaction?Enthalpy change of a reaction is the energy changes that occur when reactant molecules form products.
Enthalpy is the heat content of a substance.
When enthalpy change is positive, the heat content of the product is greater than that of the reactant and the reaction is an endothermic reaction.
Whereas, when enthalpy change is negative, the heat content of the reactant is greater than that of the product and the reaction is an exothermic reaction.
Therefore, since the enthalpy change of the given reaction is negative, the reaction is an exothermic reaction.
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Estimate the percent ionic character of the co bond. (note that the electronegativity of c is 2.5 and that of o is 3.5.)
From the calcuation, the percent ionic character of the bond is 70%
What is percent ionic character?The term percent ionic character has to do with the degree of ionic bonding that is contained in a compound. It can be estimated from the electronegativity of each element.
We can use the formula; 100(1 - e^(-ΔEN² / 4))
EN = χB − χA * 100/1
EN = 3.5 - 1.5 = 1
100(1 - e^(-1)^2/4)
= 70%
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Answer: 25
Explanation:
The electronegativity of a C
atom is 2.5, and the electronegativity of an O
atom is 3.5. The absolute value of the electronegativity difference is
electronegativity difference= |2.5−3.5|
= 1.0 = 25%
Note the trend between the points in the bottom left region of the chart. According to this trend, the percent ionic character of a bond with a dipole moment 1.0 is approximately 25 %
(1) it takes 40 ml of a 0.25 m naoh solution to neutralize 100 ml of an hcl solution. what is the concentration of the hcl solution?
Answer:
0.1M
Explanation:
Using Neutralisation formula,
MaVa=MbVb
>>(0.25)(40)=Mb(100)
Mb=0.1M
A 10 cm3 piece of aluminum has a higher density than a 5 cm3
of aluminum. True or false
Answer:
Explanation:
No density does not change when the volume changes unless something is added to the 5 cm^3.
The answer is False
What’s the question??
Answer:
the phenotype of TT is the right answer
