Answer:
Explanation:
you sack
What is true about matter?
A. Matter has mass and takes up space.
B. Matter has mass but does not take up space.
O C. Matter takes up space but does not have mass.
O
D. Matter does not have mass or take up space.
Answer:
A
Explanation:
Matter is always anything that can take up space and in order for something you can touch (matter is tangible) It has to have mass.
What is the difference between a homogenous and a heterogeneous?
Answer:
Explanation:
A homogeneous mixture consists of one single phase while a heterogeneous mixture consists of two or more phases.
Which of the following elements is a gas at room temperature?
Answer:
hydrogen, nitrogen, oxygen, fluorine, chlorine
A reaction that releases energy in the form of heat is called a/n
Answer:
Exothermic reaction!
Explanation:
Exo -> Releases Heat
Endo -> Absorbs Heat
10. Benzene deactivating group is:
a. -OH
b. --CH3
c. -C2Hs
d.-CI
Answer:
CH3
Explanation:
What does the image represent?
Answer:
ether
Explanation:
If false rewrite the statements to make them correct True or False.
1. Only particles in the solid state are in motion.
2. The particles of a solid have more energy than those of a gas.
3. In a glass of iced tea, tea is the solute.
Write the chemical formula for the following structure. You can't write subscripts so just
do full size subscript numbers.
Answer:
H2O2
Explanation:
By numbering the atoms we know about that it’s Hydrogen Peroxide
Predict the chemical formula for the ionic compound formed by NH4+ and POsub4exponent3-
Which example is NOT a chemical change? *
A. Hydrogen peroxide bubbles in an open wound on your skin.
B. Piece of pizza digested when eaten.
C. Rotting Easter eggs. .
D. Dissolving salt in water.
Answer:
The answer would be D as no chemical change is occuring.
Explanation:
Answer:
D. Dissolving salt in water.
Explanation:
No chemical change is actually occurring when salt is added to water
☆ Electrons are much more unpredicable
the what bour said
Answer:
this is very true
Explanation:
A tree leaf appears to be green. Which statement explains why the leaf isn't a
blackbody radiator?
A. The leaf reflects light and does not emit it.
B. The leaf does not change temperature when it reflects light.
C. The leaf emits light but does not reflect it.
D. The leaf emits only blue and yellow light.
Answer: A- Like the comments in the other one,the answer is A.
Explanation: Leaves don't emit visible light.
The statement that explains why the leaf isn't a blackbody radiator is the leaf reflects light and does not omit it. The correct option is A.
What is a blackbody radiator?A blackbody radiator is an object that absorbs all the electromagnetic radiation, of any wavelength and coming from any direction. This object does not emit any light to it. According to law, the good absorber is one who is also a good emitter.
The tree leaf is not a blackbody radiator, because it absorbs only green light and other lights are emitted by it, that's why it appears green. Whereas a blackbody radiator does not emit any amount of light even if the temperature will be increased.
Thus, the correct option is A. The leaf reflects light and does not omit it.
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Draw the structure of the product formed in the reaction of an epoxide with ethoxide ion. If more than one stereochemical product is possible, draw only one isomer.
Answer:
See explanation and image attached
Explanation:
The most common reaction of epoxide rings is the ring opening reaction. This ring opening reaction serves to relieve the stress in the ring.
Now, The first step in the acid catalysed epoxide ring opening reaction is the protonation of the epoxide.
This is now followed by the attack of the nucleophile. Subsequent deprotonation regenerates the acid catalyst and yields the product.
The structure of the product formed in the reaction of an epoxide with ethoxide ion is attached below as we get 2 substituted alcohol product.
What are epoxides?Epoxides are comes under the category of ether, which are the three membered ring structure.
Due to its ring structure, strain or stress is present in the three membered ring which makes it available to react easily with nucleophile. Ethoxide ion acts as a nucleophile in this reaction which attacks on the electrophilic carbon of the epoxide and resulting into the break up of bond and opening of ring.
As a result of this reaction we get the 2 substituted alcohol as attached in the image.
Hence structure of the product is attached below.
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When Copper metal is exposed to Oxygen gas, solid copper (11) oxide forms on the surface.
What is the formula for the following compound: Copper
Answer:
jjsydydbbeyxgxhx
Explanation:
nnhejjej
Why do not all rock types contain fossils?
Excessive heat and pressure can destroy fossils.
Fossils can only be created in certain places around the world.
Fossils cannot be created near volcanoes.
Fossils are too large to be found in igneous and metamorphic rocks.
Answer:
Igneous rocks form from molten rock, and rarely have fossils in them. Metamorphic rocks have been put under great pressure, heated, squashed or stretched, and fossils do not usually survive these extreme conditions. Generally it is only sedimentary rocks that
Explanation:
Hope it helps, some how.
Your welcome :)
Which explains why many places on Earth experience four seasons each year rather than just
two?
A As Earth orbits around the Sun, the axis changes its amount of tilt, which causes a change in
the amount of sunlight reaching Earth.
B Eastern and western hemispheres each experience a different season when Earth is at each
position shown and when it is 14 and 34 around its orbit.
C Halfway between the positions shown, the amount of solar energy received is less than when
the axis is pointed toward the Sun, but more than when the axis is pointed away from the
Sun.
D When Earth is 14 and 3/4 around its orbit, the northern hemisphere points directly at the Sun.
Answer:
d is the right one I think
What is the concentration of sodium ions in 0.185 M Na2CO3?
Answer:
0.370 M
Explanation:
Step 1: Given data
Molar concentration of the sodium carbonate solution: 0.185 M
Step 2: Write the balanced dissociation equation
Sodium carbonate is a strong electrolyte that dissociates according to the following equation.
Na₂CO₃(aq) ⇒ 2 Na⁺(aq) + CO₃²⁻(aq)
Step 3: Calculate the molar concentration of sodium ions
The molar ratio of Na₂CO₃ to Na⁺ is 1:2.
0.185 mol Na₂CO₃/L × 2 mol Na⁺/1 mol Na₂CO₃ = 0.370 mol Na⁺/L
Question 1 S
A student left a sealed jar of water outside her home. Water can be a solid liquid or gas When she put it outside the water was a
solid Twelve hours later, the water had changed phase and was a liquid. What happened to the water molecules?
A Before the student left, the molecules were moving in place. After the molecules were moving around each
other
B Before the student left, the molecules were moving around each other After the molecules were moving away
from each other.
C Before the student left the molecules were moving around each other. After the molecules were moving in
place
D. Before the student left the molecules were moving away from each other. After the molecules were moving
around each other
Answer:
A
Explanation:
Before the student left, the water molecules were moving in place, then after that, the water molecules were moving around each other.
Option A is correct.
Water can exist in three phases of matter as solid, liquid, or gas. In the solid state, the constituent of the particles is closely packed together.
In the liquid state, the particles are held together by intermolecular forces and they move around each other.In the solid state, before the student left the sealed jar outside her house, the particles molecules of the water are moving in place closely packed together, but after a period of time, the molecules start to move around each other.
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Use this media to help you complete the question.
There are three known forms of hydrogen. These forms are called (isotopes, ions, copies) of each other. Each of these forms will have the same number of (neutrons, protons, electrons) but different numbers of (neutrons, protons, electrons) in their nuclei.
Answer:
Isotopes, protons, netrons
Explanation:
Answer:
There are three known forms of hydrogen. These forms are called Isotopes of each other. Each of these forms will have the same number of protons but different numbers of neutrons in their nuclei.
Explanation:
what is the characteristics of solid
Answer:
they have there own shape that is not manipulated and they are typically hard
Explanation:
Which pair of elements will form an ionic bond?
Answer: A pair of elements will most likely form an ionic bond if one is a metal and one is a nonmetal. These types of ionic compounds are composed of monatomic cations and anions
Explanation:
The reaction used to produce solid iron ore is below.
Fe2O3 (s) + 3CO (g) à 2Fe (s) + 3CO2 (g)
The reaction of Fe2O3 with CO has a theoretical yield of 129 grams solid Fe. In the laboratory, your reaction produces 87.4 grams of solid Fe. What is the percent yield?
This person is fishing in a small, freshwater body of water. This body of water flows into a larger body of water called a river. What is this small body of freshwater called?
Answer:
Explanation:
The smallest body of water is the brook, a natural stream of water that is found aboveground and is often called a creek as well. A brook is usually a tributary (a small body of water that naturally flows into a large one) of a river, but this is not always the case.
Answer:
pond
Explanation:
Which kingdom contains both unicellular and multicellular eukaryotic organisms?
Animalia
Fungi
Plantae
Bacteria
what is is pls
Which statement describes an interaction between the biosphere and the atmosphere that is related to
photosynthesis?
• During photosynthesis, plant roots take in water from soil.
O During photosynthesis, plants take in carbon dioxide from the air.
O Through photosynthesis, energy stored in plants is released into the air.
O Through photosynthesis, energy stored in plants is transferred to humans who eat them
Answer:
O During photosynthesis, plants take in carbon dioxide from the air.
Answer: The answer is: During photosynthesis, plants take in carbon dioxide from the air.
Explanation: I have my ways ;>
formula for trichlorine tetroxide
Which statement describes the relationship between bonding and surface tension?
A. The more hydrogen bonds a molecule can make, the lower the surface tension.
B. The more jonic bonds a molecule can make, the higher the surface tension
C. The more hydrogen bonds a molecule can make, the higher the surface tension.
D. The more ionic bonds a molecule can make, the lower the surface tension.
Answer: c
Explanation:
Answer:
C. The more hydrogen bonds a molecule can make, the higher the surface tension.
Explanation:
What do a fruit salad, a carbonated beverage, and a pile of clothes have in common?
Answer:
They're all mixtures of something
Explanation:
The definitive difference between speed and velocity is the consideration of _____.
A. variation
B. Direction
C. angles,
Answer: direction
Explanation:
How many moles are in 5.34 x 10*21 particles of Nitrogen?