Answer:12
Explanation:because it’s 12
Which statement about the fossil record is correct?
Answer: most specimen that have lived on earth is still living here on earth
Explanation:
The statement correct about fossil record is option b. Extinction is rare a rare event and rarely seen in the fossil records.
What is fossil records?Fossils are the preserved remains of decomposed plants and animals. There are mainly two types of fossils namely , body fossils and trace fossils. Body fossils include bones, skull, and other body parts.
Trace fossils are traces of some actions of organisms that lived in earth. For example foot prints, caves, shells etc. The entire fossils—both known and unknown—along with their placement in strata and fossiliferous rock formations are collectively referred to as the fossil record.
The fossil record was one of the earliest data sources used to support the study of evolution and is still important for understanding the evolution of life on Earth. Geologists can now calculate the numerical or absolute age of different strata. It records extinction of some animals and plants as rare event.
Find more on fossil records:
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12 and 24
a. GCF
b. LCM
a.12= 2^2*3
24= 2^3*3
GCF= smallest power of each common factor
GCF= 2^2*3
GCF= 12
b. 12= 2^2*3
24= 2^3*3
LCM = greatest power of each factor involved
LCM= 2^3*3
LCM= 24
rite TRUE if the statement is correct and FALSE if it is
1. Coral reefs and mangrove swamps are rich so
2. Mangrove swamps protect coastline areas an
3. Cutting down of trees lessen global warming
4. Tropical rainforests serve as shelter and habi
5. Coral reefs come from the waste of marine a
6. Mangrove swamps are found on the deep p
7. Overfishing causes destruction to food chai
8. Coral reefs cause formation of tidal waves.
9. Rainforests ecosystems supply a variety of
10.Coral reefs serve as hatchery for birds.
plete the graphic organize below. Write why y
Ecosystomo
Answer:
uR making us work hard for this and yet all u give is 5 points
Plz help :’(
Using structural formula, write a balanced equation for the following and name the organic product.
2-methylbutan-1-ol + hot conc H2SO4
Explanation:
2-metylbutene should be the profuct
Which example is NOT a physical change? *
A. Green bananas turning yellow as they ripen.
B. Mixing ingredients to make a cookie.
C. Using dye to change the color of shirt
D. Getting your hairs cut.
Answer:
A
Explanation:
it is no longer going to unripen/ went through a chemical reaction
ammonia gas occupies a volume of 57.9 L at a pressure of 532.4atm. if the pressure were lowered to 256.8atm,what would the new volume be
Answer:
683838447745 anmmlllkkkkk
What is the total number of electrons in the second energy shell of a calcium atom in the ground state
Answer:
8 electrons
Explanation:
The atomic number of calcium (ca) is 20. Therefore,
in the first shell the number of electrons are 2
in second shell the number of electrons are 8
in the third shell the number of electrons are 8
in the fourth shell the number of electrons are 2
electronic configuration in ground state:
1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2
Hope it helps u (｡◕‿◕｡)
What is the molecular polarity of calcium hydroxide
Answer:Calcium hydroxide is a polar compound. 2. Carbonates are insoluble in water unless it is combined with NH4+ or any group 1A ion. It is a colorless crystal or white powder and is produced when quicklime (calcium oxide) is mixed, or slaked with water.Ca(OH)2 is an ionic compound, in which Ca is the cation and OH is the anion. Ca (calcium) has a charge of 2+, since it is in group 2 on the periodic table.
Explanation: hope this helps and have a great night
What is berylium phosphide anion?
Answer:
Molecular Formula, Be3P2. Synonyms. Beryllium phosphide. Beryllium phosphide (BeP2). EINECS 261-137-1. 57620-29-8. 58127-61-0. Molecular Weight.
Molecular Formula: Be3P2
Molecular Weight: 88.98407 g/mol
Structure: Find Similar Structures
PubChem CID: 6453515
Explanation:
What is the compound name for magnesium sulfur
Answer:
MgS is the formula and Magnesium sulfide is compound name
Explanation:
Answer:
MgS
Explanation:
Calculate the number of grams of 3.24 x 10^22molecules of CH3(CH2)8(OH)2
8.68 g CH₃(CH₂)₈(OH)₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
3.24 × 10²² molecules CH₃(CH₂)₈(OH)₂
Step 2: Identify Conversions
Avogadro's Number
[PT] Molar Mass of C - 12.01 g/mol
[PT] Molar Mass of H - 1.01 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of CH₃(CH₂)₈(OH)₂ - 12.01 + 3(1.01) + 8[12.01 + 2(1.01)] + 2[16.00 + 1.01] = 161.3 g/mol
Step 3: Convert
Set up: [tex]\displaystyle 3.24 \cdot 10^{22} \ molecules \ CH_3(CH_2)_8(OH)_2(\frac{1 \ mol \ CH_3(CH_2)_8(OH)_2}{6.022 \cdot 10^{23} \ molecules \ CH_3(CH_2)_8(OH)_2}) \cdot (\frac{161.3 \ g \ CH_3(CH_2)_8(OH)_2}{1 \ mol \ CH_3(CH_2)_8(OH)_2})[/tex]Multiply/Divide: [tex]\displaystyle 8.67838 \ g \ CH_3(CH_2)_8(OH)_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
8.67838 g CH₃(CH₂)₈(OH)₂ ≈ 8.68 g CH₃(CH₂)₈(OH)₂
1. Oxygen gas has a pressure of 680 mmHg. What is the pressure in atmospheres?
If a sample of oxygen gas occupies 30.0 mL at -10°C and 680 mmHg, what is the volume at 10°C and 310 mmHg? Express your answer to two significant figures and include the appropriate units.
In the formation of sodium chloride by the combination of
sodium and chlorine:
Answer:
Na(s) + Cl2(g) = NaCl(s)
I need help with both parts, ill give brainliest and 30 points
Part A: What changes does sugar undergo when heated in a spoon over the flame?
Select one:
A. A physical change, then a chemical change
B. Two physical changes
C. Two chemical changes
D. A chemical change, then a physical change
Part B: What evidence from the experiment and data table best supports your answer to Part A? Use information from the stimulus material and your knowledge of science to support your answer. In your answer, be sure to:
Desribe the evidence that supports your answer to Part A.
Provide your reasoning why that evidence supports your answer to Part A.
Answer:
part a=A. A physical change, then a chemical change
part b:evidence
without physical change any sorts of chemical change do not take place.
for example: when sugar is heated on spoon the physical change takes place in sugar .sugar starts to form liquid from solid.
Answer:
Part A. C would be your answer I think
Sugar is made of carbon, hydrogen and oxygen atoms. When heated over a candle, these elements react with the fire to turn into a liquid. The heat causes the sugar's atoms to combine with the oxygen in the air, forming new groups of atoms. Energy is released in this chemical reaction in the form of smoke and black soot.
Part B. I don't know I just think of the answer... Meaning I'm good and science, Chemistry and all that good stuff ;-;
Explanation:
summarize what happens to a balls energy when it bounces?
Answer:
When a ball bounces, it initially gains speed or kinetic energy—the energy of motion. When it reaches Earth, it collides head-on with an incredibly massive object that is, from your perspective, at rest. The ball slows down, deforms temporarily and shoots back up.
Explanation:
I hope this helps.
Answer:
When you hold the ball in the air, the ball has gravitational potential energy. Realizing it will turn the potential energy into kinetic energy. When the ball touches the ground, the kinetic energy will turn into elastic potential energy. When it bounces back up, it will turn into kinetic energy. When the ball is in that position where the ball was being held, it will have gravitational potential energy and repeat the cycle.
Explanation:
Terms to know:
Gravitational potential energy is the energy of an object that possesses because of its position in a gravitational field.
Elastic potential energy is energy stored as a result of applying a force to deform an elastic object.
Kinetic energy is the energy that objects posess due to motion.
When 20g of hydrogen gas will react with 20g of chlorine gas, what is the mass of hydrogen chloride formed?
Answer:
40g
Explanation:
equation; H2 + Cl2 ---- 2HCl
mole ratio; 1 mole 1 mole 2 moles
before reaction;20g 20g 0g
after reaction; 20g 20g 40g
What is the Noble gas electron configuration of lead (Pb)?
What is the rate of reaction
Answer:
The reaction rate is defined as the amount of substance that is transformed into a given reaction per unit volume and time.
Squirrels eat acorns for energy and to grow and repair tissues. How is an acorn used to build squirrel muscle?
The elements in the acorn can be rearranged to make the molecules the squirrel’s body needs
The energy from the acorn warms any damaged muscle and allows it to repair itself and heal
The proteins found in acorns are the same as squirrel muscle proteins, so they attach to muscle cells
Once the acorn has been digested by the squirrel, the carbohydrates are converted to muscle tissue
Answer:
The elements in the acorn are rearranged to make the molecules the squirrel's body needs. The proteins found in acorns are the same as squirrel muscle proteins, so they attach to muscle cells.
Explanation:
hpoe this helps
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 :)
How many particles are in 67 grams of Oxygen?
An athlete can run 4 m/s. How far can she run in 3 minutes?
Answer:
720
Explanation:
4 m/s
60 seconds
= 180 seconds
3 minutes
4 m/s
= 720 m/s
180 seconds
Answer this correctly please...
1. Two body systems Which of the following is NOT a part of the integumentary system of the body?
A. hair
B. bones
C. skin
D. finger and toe nailswork together to help remove waste products from blood.
2. What are these two systems?
A. circulatory and excretory
B. skeletal and digestive
C. circulatory and integumentary
D. muscular and excretory
3. One of the functions of the endocrine system in the body is to -
A. circulate blood to all parts of the body
B. collect waste products and remove them from the body
C. provide a strong framework for the body
D. produce enzymes to help digest food
6. When a person’s body needs food, the brain helps maintain homeostasis by sending signals that make the person
A.feel hungry.
B. perspire.
C. put on a sweater.
D. feel tired
7. The largest human body organ which regulates temperature and serves as a barrier against harmful microorganisms belongs to the -
A. circulatory system
B. nervous system
C. digestive system
D. integumentary system
8. Which of the following is NOT a part of the respiratory system?
A. diaphragm
B. esophagus
C. lungs
D. trachea
9. What would happen to your body if you had little or no bone marrow?
A. Your other systems would make up for it
B. You would not have enough red blood cells
C. Nothing would happen to you.
D. You would not have enough cartilage.
Answer:
1. B
2. C
3. B or D
6. A
7. D
8. A
9. A
Explanation:
Brainliest plz answered to the best of my abilitys
The diagram represents an atom of sodium combined chemically with one atom of chlorine to form a sodium chloride molecule. Sodium Chloride is an example of
Answer:
It is an example of ionic compound and ionic salt
Kinetic energy is energy stored in an object due to its position.
True
Or
False
Answer:
[tex]\boxed {\boxed {\sf False}}[/tex]
Explanation:
Kinetic energy is the energy of movement or energy at work. An example is a ball rolling down a hill.
Potential energy is stored energy due to the position of an object. For example, a ball resting at the top of a hill.
The question incorrectly described potential energy as kinetic energy. Therefore, the answer is false.
Body Color is a ___________
Variation
Trait
Feature
Observation
Due to changes in the environment, having lighter-colored fur becomes a
survival advantage in a population of wolves.
What is most likely to happen in the next generation?
Answer:
There will be more light-colored wolves.
Explanation:
Evolution is based off the survival of those with the most advantages in the wild. Since their light coat gives them a survival advantage, they will reproduce more.
How many moles are in 568 grams of Gold?
Carbon is the most abundant element in the universe.
O True
O False
Answer:
Carbon is not only the most abundant element on Earth; it is believed to be the most abundant element in the universe. Each of carbon's three valence electrons shares a bond with another atom. Single bonds between carbon atoms are typically shorter than double bonds between carbon atoms.
Explanation:
Answer:
False
Explanation:
Look at the diagram of a fuel cell below.
Which parts of the fuel cell do A and B represent?
A. air
B. anode and cathode
C. electrolyte
D. hydrogen and nitrogen