Answer:
The sun's position near earth
Explanation:
which phrase is the best description of osmosis
movement of water from high potential to low potential
What is the difference between a theory and a scientific law?
Think of it like theory and physics.
A theory is an idea that needs to be tested.
Scientific law is something that cant be proven wrong.
Speed can be though of as ____ the at which an object covers a _____.
A) speed,kilometer
B) Rate,distance
C) Forces, distance
D) Distance, rate
Pls help me with this question like now thank
Answer:
Speed can be thought of as the rate at which an object coverse distance
B) Reate distance
which statement describes virginia's watershed i need this ASAP pls help
B: It has fewer than 10 total watersheds best describes
What is a watershed?A watershed is the area of land where all of the water that falls in it and drains off of it goes to a common outlet. All the land drains water into rivers that drain into the Chesapeake Bay, where it enters the Atlantic Ocean.
Why is it called a watershed?The area that drains into a single river is the watershed for that river.
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L 2.5.2 Test (CST): Computer-Scored Unit Test
Question 5 of 25
How does increasing the temperature affect a reaction?
A. An increase in temperature slows down the reaction.
B. An increase in temperature increases the reaction rate.
C. An increase in temperature lowers the reaction's activation energy.
D. An increase in temperature changes equilibrium concentrations.
SUBMIT
Answer:
b
Explanation:
The concept Arrhenius equation is used here to determine the temperature dependence of the rate of a reaction. An increase in temperature increases the rate of a reaction. The correct option is B.
What is Arrhenius equation?The rate of a chemical reaction is affected by the factors like temperature and activation energy. The influence of these factors on the rate of the reaction is explained by the Arrhenius equation.
The equation is given as:
[tex]k = A. e^{-} ^{E_{a} } /RT[/tex]
k - Rate constant
A - Frequency factor
Eₐ - Activation energy
R - Gas constant
T - Temperature
Since 'Temperature' appears in the denominator of the negative power of the exponential factor of the equation, it is evident that an increase in temperature increases the value of rate constant and thereby increases the rate of the reaction.
Thus the correct option is B.
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Each atom consists of a central nucleus and several shells that contain electrons. The outermost electrons are called valence electrons. Most atoms are stable with a configuration of eight valence electrons. This is known as the octet rule. How many valence electrons does each atom have?
If you are talking about an atom with a full octet, then it would just have a full shell of 8 valence electrons.
Answer:
valence
Explanation:
What molecular shape is oxygen dibrimide
Answer:As predicted by VSEPR theory, the molecule adopts a "bent" molecular geometry similar to that of water.
Explanation:
Label the molecular view.
Label the species in the atomic-scale picture to represent the result when equimolar amounts of
aqueous barium hydroxide and aqueous iron(II) chloride are combined.
Ba
FeCl2
Fe(OH)2
Ba(OH)2
Ba2-
Cl2
CI
Fe
BaCl2
Fe2-
OH
H2O
solid =
Fe(OH)2
The elements should be label as follows yellow = OH, blue = Fe, green = Ba, red = Cl
The mix between aqueous barium hydroxide and aqueous iron chloride leads to barium chloride and iron hydroxide. This reaction is shown below:
Ba(OH)2 + FeCl3 → BaCl2 + Fe(OH)3Moreover, in these products, the iron hydroxide will form a solid substance that precipitates in the bottom of the container, while the barium chloride is more likely to maintain its liquid state.
According to this, the substance in the bottom is the iron hydroxide or Fe (OH)2, and in this, the yellow dots represent the Hydroxide or OH, while the blue dots are the Iron considering there in iron hydroxide there are two molecules of OH for each molecule of iron.
On the other hand, at the top, there is the barium chloride or BaCl2. This means the green dots are the Barium and the red ones are the Chlorine as there should be more Chlorine particles than Barium ones
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I WILL MARK YOU BRAINLIST PLEASE HELP
Answer: See below
Explanation: a. The mass of an element is composed of:
protons: 1 amu each
neutrons: 1 amu each
electrons: 0 amu each
Only the protons and neutrons are counted in the atomic mass of an element
b. Electrons are assigned a mass of 0. They do have a mass, but it is exceedingly small compared to the protons and neutrons, so they are left out of the calculation of an element's mass.
c. An element becomes unstable if the neutrons exceed the protons by a certain ratio, dependent on the element.
How many moles of CH 3CH 2OH are contained in 280 mL of 0.0788 M CH 3CH 2OH solution?
4.32×10−2mol hope it helps
Which of the following is not a derived unit?
A) g/ml
B) liter
C) kg
D) All of these are derived.
Which stament describes a Newton
Answer:
It reflects the amount of force an object exerts. It states that every object attracts another object.
You have a gas sample of carbon dioxide at 298 K. If the pressure is 0.827 atm what is the pressure in mmhg
Answer:
628.520 mmHg
Explanation:
1 atm = 760 mmHg
[tex](760 \div 1) \times 0.827[/tex]
The pressure of 0.827 atm in mmHg is 628.52 mmHg
Pressure has various units of measurement such as atmosphere (atm), pascal, mmHg, Newton per square metre (N/m²) etc. These units can be converted from one to the other.
Considering the question given above, we can convert 0.827 atm to mmHg as illustrated below:
1 atm = 760 mmHg
Therefore,
0.827 atm = 0.827 × 760
0.827 atm = 628.52 mmHg
Thus, 0.827 atm is equivalent to 628.52 mmHg
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A basketball weighing 0.5 kg is flying through the air at 10
m/s. What is its kinetic energy?
Enter the answer
Check it
Improve this questio
Answer:
25J
Explanation:
Kinetic energy = (mv^2)/2. So (.5)(10^2)/2 = 25 J
TRUE OR FALSE:The basic atom has a neutral charge.
true because I already foresighted a whole lot of things that I was not able to
Answer:
True
Explanation:
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.
;D
If I have 1000ml of water and 10 ml of water, which will have the greater density? Why?
Answer:
1000 ml
Explanation:
hope it helpssssssss
Answer:
1000 ml because the bigger ml the greater density brainliest pls
What is the relationship between number of electrons on the outer energy levels and
groups?
Answer:
Every element in a given group has the same number of valence electrons. For elements in the main groups (1-2, and 13-18), the number of valence electrons increases when moving from left to right along any period (row). The noble gases contain a full valence electron shell, which consists of eight electrons.
Explanation:
Hope this helps.
Answer:
Valence Electrons
Explanation:
Say you are looking at a neutrally charged carbon atom, it has 6 electrons. The first electron shell can hold 2 electrons. The next can hold 8, the next can hold 8 and the next can hold ten and so on... Well in the Carbon atom case, it has 6 electrons, 6-2 is 4, so the carbon atom at 4 valence electrons, which actually helps it in making organic molecules, which in turn also helps make something you might have heard of before, organisms, the best example being, humans
The basic unit of structure and function of living things is the .
Answer:
It would be cell
Explanation:
If im correct then please mark me as brainliest!
Using one or more of your senses to gather information is called
observing
c predicting
b inferring
d classifiying
Answer:
using one or more of your senses is Observing
How many grams of O2 are present in 44.1 L of O2 at STP?
a.10.0 g
b.16.0 g
c.32.0 g
d.410.0 g
e. 63.0 g
Taking into accoun the STP conditions and the ideal gas law, the correct answer is option e. 63 grams of O₂ are present in 44.1 L of O2 at STP.
First of all, the STP conditions refer to the standard temperature and pressure, where the values used are: pressure at 1 atmosphere and temperature at 0°C. These values are reference values for gases.
On the other side, the pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
P×V = n×R×T
where:
P is the gas pressure.V is the volume that occupies.T is its temperature.R is the ideal gas constant. The universal constant of ideal gases R has the same value for all gaseous substances.n is the number of moles of the gas.Then, in this case:
P= 1 atmV= 44.1 Ln= ?R= 0.082 [tex]\frac{atmL}{molK}[/tex]T= 0°C =273 KReplacing in the expression for the ideal gas law:
1 atm× 44.1 L= n× 0.082 [tex]\frac{atmL}{molK}[/tex]× 273 K
Solving:
[tex]n=\frac{1 atm x44.1 L}{0.082\frac{atmL}{molK}x273K}[/tex]
n=1.97 moles
Being the molar mass of O₂, that is, the mass of one mole of the compound, 32 g/mole, the amount of mass that 1.97 moles contains can be calculated as:
[tex]1.97 molesx\frac{32 g}{1 mole}[/tex]= 63.04 g ≈ 63 g
Finally, the correct answer is option e. 63 grams of O₂ are present in 44.1 L of O2 at STP.
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https://brainly.com/question/4147359?referrer=searchResultsHow many Joules are there in 3301 calories? (1 cal = 4.18 J)
Answer:
13798.18 J
Explanation:
3301 cal * 4.18 J/1 cal = 13798.18
Recall that (1 cal = 4.18 J)
Which two of these formulas have an equal number of carbon atoms present?
1 - MG3(PO)2
2 - Na SO4
3 - NO3(CH3)3
4 - C&H 206
5 - Al(NO3)3
3 and 4
1 and 2
3 and 5
3, 4, and 5
Choose the correct answer.
Answer:3 and 4
Explanation:I got it right on a quiz.
Answer:
3 & 4
Explanation:
Determine the amount protons and electrons in Mg^2+
Answer:
12 protons, 12 neutrons and 10 electron
The element radium has a mass number of 226 and an atomic number of 88. How many neutrons does an atom of radium have?
A. 226.
B. 88.
C. 138.
D. 314.
Answer:
if you subtract 88 from 226 you get 138
so uour answer would be C.
Answer:
138
the conversion of an atom of one element into a different element through nuclear changes
A nuclear equation is balanced according to mass number. A chemical equation is balanced according to the total mass before and after the change
82
Some of the matter is converted to energy
Explanation:
I've used this website enough I think its time for me to give back.
What is an engineer?
a person trained to use technology and science to solve problems
b. a person who manufactures or produces a product
с. a person who markets and advertises a product
d all of the above
Look at screen shot.
Answer:
If the cell was a city, what would the city have inside it for it to function as a cell?
Explanation:
The cell membrane can be a fence or wall around the city because it controls what enters and leaves the cell, and separates the cell from the outside.
The nucleus could be the city hall because it protects DNA and controls the cell (city)
The mitochondria could be the greenhouse because it makes ATP energy from sugar + 02
The chloroplasts could be a farm or garden because it is where photosynthesis takes place and makes energy + sugar from sunlight
The ribosomes could be the factory to make stuff because it makes proteins
The endoplasmic reticulum could be a kitchen or restaurant because it helps finish proteins, and makes membranes.
The golgi apparatus could be the postal office because it finishes packages and ships proteins
The vacuoles could be a water tank because it storages water
I hope this helps. It is basically as if something was turning into a city-type thing. Like Lysosome could be a recycling center in a city.
PLS GUYS HELP!!!! Examine the table with the distances and times recorded for five different trains. Calculate the average speed for each train and select the correct answer choices. Select ALL that apply.
Answer:
A: Train I had the fastest average speed
C: Trains II and V had the same average speed
E: Trains III and IV had the same average speed
Explanation:
The diameter of Mercury is 4,878,000 meters.
Type your answer..
Answer:
The diameter of a mercury atom is 151 pm and the diameter of the planet Mercury is 4,879.4 km.
Under which of the following circumstances might a person develop capgras delusion?
A. during childhood as a result of an emotional shock
B. as a result of a family predisposition to the condition
C. following a head injury that cause brain trauma
D. due to normal aging processes on the brain
Answer:
a
Explanation:
In 1988, three gray whales were trapped in Arctic ice. Television crews captured the frantic attempts of hundreds of people to save the whales. Eventually, a Soviet icebreaker and U.S. National Guard helicopters arrived to help free the whales. The cost of the rescue mission exceeded $5 million.
i. Write a scientific question related to the whale story.
ii. Write a nonscientific question related to the whale story.
The scientific question related to the whale story is how were the whale's rescued? The non-scientific question related to the whale story is what was the need for spending such large amount of money?
What is a scientific question?It is a one where an investigation can be designed and can be approached to completion in order to find out an answer.This can be done without doing different investigations.
It should have valuable information and should have the potential that it can be answered by direct observations.It should always lead to a hypothesis.
A scientific question must have the following characteristics:
It must have an objective and should be testable.It should focus on an independent variable and a dependent variable.It should be feasible and coherent.Whereas, characteristics of a non -scientific question is that they are broad,and have many variables to be tested.
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