Answer:
Density oil will float
Explanation:
Some students measure the acceleration of a wheeled cart being acted on by varying forces. The students record their data in the table shown above. According to the data table, how much force is acting on the cart when the students measure an acceleration of 2.6 m/s2?
A. 13 N
B. 7 N
C. 8 N
D. 12 N
F = 13 N
Further explanationGiven
Acceleration= a = 2.6 m/s²
Required
Force
Solution
Newton's second law :
ΣF = m x a
The wheeled cart used in the experiment is the same, so the mass used is the same
We use one of the data for example data 1 to find mass :
F = 1 N, a = 0.2 m/s²
m = F/a
m = 1/0.2
m = 5 kg
so for acceleration= a = 2.6 m/s² :
F = 5 kg x 2.6 m/s²
F = 13 N
Explain the following terms Sublimation
Answer:
Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. ... The reverse process of sublimation is deposition or desublimation, in which a substance passes directly from a gas to a solid phase.
What would happen to the entropy in the reaction 2O^3(9) ► 3O^2 (g)?
O A. It decreases.
O B. It increases
O c. It stays the same.
O D. It is impossible to tell.
What is a paleontologist?
How does thermal energy affect chemical changes
Answer:
It makes chemicals hot or cold which makes chemicals react differently
Explanation:
mark me brainliest
5.Calculate the number of moles of 18.0 dm3 of carbon monoxide (CO) at rtp.
Answer:
0.81mole
Explanation:
Given:
Volume of carbon monoxide = 18dm³
Unknown
Number of moles of carbon monoxide = ?
Solution:
To solve this problem;
1 mole of any gas at rtp occupies a volume of 22.4dm³
So;
x mole of carbon monoxide will occupy a volume of 18dm³ at rtp
22.4x = 18
x = [tex]\frac{18}{22.4}[/tex] = 0.81mole
What is a disadvantage of using solar energy?
I didn’t mean to click on a answer but help
Answer:
the cost is high..it uses alot of space...associated with pollution
Many disciplines are involved in environmental science, including chemistry and biology which ___ and economics and political science which __. Multiple choice question.
Answer:
Contribute evidence; help us understand how people use resources.
Explanation:
Environmental science can be defined as an interdisciplinary field of science that comprises of chemistry, economics, engineering, zoology, geography, geology, biology, ecology, physics, etc., used for the study and understanding of various environmental factors, issues in relation to human life.
Many disciplines are involved in environmental science, including chemistry and biology which contribute evidence and economics and political science which help us understand how people use resources in the production of goods and services to meet the need or requirements of consumer. These resources include land, labor, entrepreneurship and capital.
What are the uses of tritium?
Answer:
biochemical research, animal metabolism studies, and ground water transport measurements.
Explanation:
A rectangular block of copper metal has a mass of 1896 grams. The volume of the block is 2cm^3. From this data, what is the density of the copper?(Please show how you got this answer)
How many molecules are in 2.0 moles of oxygen gas
Answer:
6.02 X 1023 molecules
Explanation:
Name the four different types of Spheres belonging to Earth and give examples of Renewable resource and the Biotic factors that exist in those spheres. There are three Abiotic (Non Living) spheres and the Biotic (Living)Biosphere exist within the three of the others
Write a short summary of the renewable resources in each sphere and explain how the biosphere interacts within the three of them
Answer:
Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).
Explanation:
Which of the following is true of SOLUBILITY?
A. if something is soluble, it will dissolve in anything
B. water will dissolve everything
C. substances often dissolve in some things and not others
Which subatomic particle has no electric charge?
1) Electron
2) Neutron
3) Proton
4) Positron
Answer:
neutrons are uncharged and electrons are negatively charged
What is the name of the family highlighted of
the periodic table above? How many valence
electrons does it have?
Is this an element?
Cu20
O Yes, it's made of 1 type of atoms
O No it's made of more than 1 type of atoms
Answer:
Yes, its made of 1 types of atoms
Explanation:
Cu20 is Copper(I) oxide or cuprous oxide
What is the mass number of chlorine?
Answer:
Explanation:
35.453 u
1.
What part of the human body is the wing most like? ANSWER
Help
What part of the human body is most likely the wing would proabably from your elbow joint and the rest of your arm but most likely it would be the elbow joint.
Determine the empirical formula of a
compound containing 2.6444g of gold
and 0.476g of chlorine.
Answer:
AuCl
Explanation:
Given parameters:
Mass of Gold = 2.6444g
Mass of Chlorine = 0.476g
Unknown:
Empirical formula = ?
Solution:
Empirical formula is the simplest formula of a compound. Here is the way of determining this formula.
Elements Au Cl
Mass 2.6444 0.476
Molar mass 197 35.5
Number of moles 2.6444/197 0.476/35.5
0.013 0.013
Divide by the
smallest 0.013/0.013 0.013/0.013
1 1
The empirical formula of the compound is AuCl
What does it mean when there is a coefficient placed before a molecule?
Provide two examples to explain your understanding.
Answer:
Coefficients are used in all chemical equations to show the relative amounts of each substance present. This amount can represent either the relative number of molecules, or the relative number of moles (described below). If no coefficient is shown, a one (1) is assumed.
Explanation:
How has the way humans communicate changed over time?
Which structures group together to form a system in the human body
Answer:
organs group together to form organ systems
Explanation:
What function does this cytoplasm perform in a plant and animal cells
Answer:
It helps shape, while holding and keeping organelles in their place.
Explanation:
Answer:
it holds the cell organelles
Explanation:
You are welcome
If the heat of combustion for a specific compound is −1160.0 kJ/mol and its molar mass is 86.47 g/mol, how many grams of this compound must you burn to release 541.20 kJ of heat?
Answer:
40.34 g
Explanation:
First, we divide the heat to release by the heat of combustion to obtain the required moles of compound:
541.20 kJ/(1160.00 kJ/mol) = 0.4665 mol
So, we have to burn approximately 0.47 mol of the compound. We convert the moles to mass in grams by using the molar mass:
mass = molar mass x moles = 86.47 g/mol x 0.4665 mol = 40.34 g
Therefore, you must burn 40.34 grams of the compound to release 541.20 kJ of heat.
What do the molecules do when they gain more kinetic energy and how does that affect the density?
The more kinetic energy a substance has, the warmer it will be and the faster particles will be moving, which reduces the density of the substance
Please help me!
Thank you
Urgent!!! Label these please!
Answer:
sorry but what is that what will do to thatWhich element creates an ion who is LARGER in size than the original atom? Rb Rn S Ca
Answer:
The element S creates an ion which is larger in size than the original atom.
Explanation:
The atomic radius of elements is a measure of the size of atoms of elements. The atomic radius is defined as one-half the distance between the nuclei of identical atoms that are bonded together. Atomic radius increases on going down the group in the period table but decreases on going rom left to right across a period in the periodic able. The increase in atomic radius on going down the group is due to the addition of an extra electron shell to successive atoms of elements in a group. However, atomic radius decreases across a period due to increase in the positive charge of the nucleus of elements in the same period.
When atoms of elements form ions, the ionic radius of the resulting ion can either increase or decrease. For positive ions, the ionic radii decreases due to loss of electron increasing the attraction of the positive nucleus or even a complete loss of an electron shell. For anions, ionic radii increases due to gain of electrons which results in greater repulsion among neighboring electrons.
Among the elements given, rubidium (Rb), and calcium (Ca) for cations, hence, their size becomes smaller. Radon, Rn, being a noble gas is relatively inert, but forms positive ions when it does take part in reactions. Sulphur, S, however forms an anion, S²⁻, hence, its size increases.
does anyone have the answer key to half life gizmos !!!!!!!!!!!
HELP PLS 50 POINTSSSS
Listed in the Item Bank are some key terms and expressions associated with the categories seen in the Venn Diagram. To find out more
information about items, some have more details available when you click on them. Drag and drop each item onto the proper area of the
diagram. If an item describes more than one category, be sure to place it in the overlapping space.
ITEM BANK: Move to Bottom
Carbon dioxide is a product. Carbon dioxide is a reactant. Carried out in animals.
Carried out in plants
Chemical Reaction
Oxygen is a product
Oxygen is reactant Produces usable energy sourc
Cellular Respiration
Both
Photosynthesis
Answer:
Carbon dioxide is a product (cellular respiration)
Carbon dioxide is a reactant(photosynthesis)
Carried out in animals(cellular respiration)
Carried out in plants(both)
Chemical reaction(cellular respiration)
Oxygen is a product(photosynthesis)
Oxygen is a reactant(cellular respiration)
Produces usable energy source(photosynthesis)
Your welcome!!! Plz mark brainliest.
Answer:attached is the correct answer
Explanation:
Photosynthesis and Respiration