Answer:
7 elements
Explanation:
Answer:
There are 7 elements
Explanation:
most elements are (1) metals (2)nonmetals (3)gases (4)made in labs
What is the balanced equation for the decomposition of calcium oxide?
what is the molecular formula of linoleic acid?
Answer:
C18H32O2
Explanation:
This is it, i hope it helps Good luck.
as liquid or gases heat up, they ___________. Then as they___________ they fall, thus As liquid or gases heat up, they driving the motion the of convection.
A: Fall, Heat
B: Bubble, Overflow
C: Create Heat, Burn
D: Rise, Cool
Help please its okay if not <3
Answer:
so sorry but I need to randomly answer 2 questions
All the organisms alive today arose from preexisting organisms.
O True
O False
Organisms often die with a little time. They make new oragnisms which then carry on their legacy.
kinetic energy increases as velocity ___
Answer:
square of it's speed
Explanation:
Answer:
kinetic energy increases as the square of its speed.
An unknown substance was put in a container. The substance filled up the container from bottom up, taking half of the space in the container.
What is most likely the state of matter of the substance?
Gas
Liquid
Plasma
Solid
According to the forces of attraction, the most likely state of matter of the substance mentioned is liquid.
What is matter?
Matter in chemistry, is defined as any kind of substance that has mass and occupies space that means it has volume .Matter is composed up of atoms which may or not be of same type.
Atoms are further made up of sub atomic particles which are the protons ,neutrons and the electrons .The matter can exist in various states such as solids, liquids and gases depending on the conditions of temperature and pressure.
The states of matter are inter convertible into each other by changing the parameters of temperature and pressure.According to law of conservation of matter , matter can neither be created nor destroyed only its state changes .
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Answer:
liquid
Explanation: liquid conforms to the shape of the container which it is held in.
A metal ball has a mass of 6 kg and a volume of 42 cubic meters. What is its density
Answer:
0.143kg/m^3
Explanation:
density= mass / volume
Answer:
1/7 kg/cubic metres
Explanation:
Here, Density=mass /volume
=6/42
=1/7 kg/cubic metres.
during an earthquake, geologists use a machine called what
Answer:
sesimographs
Explanation:
Answer:
A seismometer
Explanation:
it measures seismic waves
What's the Matter?
Which statements correctly describe matter? Select all that apply.
A. Matter is made up of atoms.
B. Matter is a measure of the amount of material in an object.
C. Matter may exist as a solid, liquid, or gas.
D. Matter forms when particles chemically bond together.
E. Matter includes both elements and compounds.
Answer:
Matter is anything that takes up space and has mass. Mass is the stu that matter is made of, or the amount of particles in a substance or object. Matter has physical and chemical properties and can undergo physical and chemical changes
C. Matter may exist as a solid, liquid, or gas.
Explanation:
3. What must you have when you pray?
Answer:
when you pray you will feel a peace and happiness in your heart
What will be the primary result of the continuation of the
geologic processes indicated at this location?
Earth's magnetic field will reverse direction.
New oceanic crust will form.
o Continental crust will be forced downward.
Earth's circumference will increase.
Answer:
B
Explanation:
new oceanic crust will form.
The formation of a new oceanic crust will be the primary result of the continuation of the geologic processes. Therefore, option (B) is correct.
What is the oceanic crust?The oceanic crust can be described as the uppermost layer of the oceanic portion of the tectonic plates. The oceanic crust is composed of the upper oceanic crust, with pillow lavas complex, and the lower oceanic crust, made of troctolite, and ultramafic cumulates.
The oceanic crust lies above the rigid uppermost layer of the mantle. The crust and the rigid upper mantle layer together compose the oceanic lithosphere.
The oceanic crust is rich in iron and magnesium and composed of mafic rocks. It is thinner than the continental crust less than 10 Km thick but it is denser with 3.0 g/cm³ as opposed to the continental crust.
The oceanic crust displays a symmetrical pattern of positive and negative magnetic lines emanating from the mid-ocean ridge.
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Write a 4-6 sentence paragraph using science vocabulary, full sentences, proper grammar, and details explaining the difference between plant cells and animal cells. Science...
Answer:
Plant cells and animal cells are both eukaryotic cells. They both have a nucleus, Golgi complex, endoplasmic reticulum, ribosomes, mitochondria, cytoskeleton and cell membrane. Only plants cells have a vacuole, cell wall and chloroplast, while animal cells have cilia, centrioles and lysosomes which plant cells don't usually have. Because of their cell walls plant cells are in rigid rectangular shapes while animal cells have looser round shapes. The main difference in their functions is that animals don't produce their own food while plan cells do.
a car accelerates from rest(zero speed) up to a spees of m/s to a speed of 30 m/s in 12 seconds. calculate the acceleration.
Are crystals of different soluble solids similar?
Crystals of different soluble solids are not similar because they are amorphous and therefore do not have definite crystals.
What are crystal solids?A crystalline solid is a homogeneous solid in which the constituent particles, atoms, ions or molecules are arranged in a definite repeating pattern.
Most of the solid substances are crystalline in nature. The arrangement of particles in a crystalline solid is such that the total intermolecular force of attraction is at maximum.
Factors in which solubility depends are temperature, pH, and ionic strength.
Crystals of different soluble solids are not similar as they do not have definite crystals.
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An atom has a charge of 1+. If the atom's nucleus contains 23 protons, the atom must have
A
25 electrons.
В.
23 electrons.
с.
22 electrons.
D.
24 electrons.
Howler and warnibers is answer
Answer:
22 electrons
Explanation:
correct answer correct answer correct answer
what is neutralisation??
Answer:
Acid + Base -------> Salt + Water
Explanation:
The reaction between an acid and bases is called a neutralization reaction. The result of the reaction is salt and water. For example, when hydrochloric acid(acid) and sodium hydroxide(base) react they form sodium chloride(salt) and water. Also, heat is evolved.
Example:
HCl + NaOH ----------> NaCl + H2O
HCl is hydrochloric acid.
NaOH is sodium hydroxide which is a base.
NaCl is sodium chloride which is a salt.
H2O is water.
the first organisms to convert solar energy into chemical energy were most likely
First organisms to convert solar energy to chemical energy were the organisms which are called as cyanobacteria.
What is chemical energy?
Energy which is stored in the chemical bonds of chemical compounds is called chemical energy.Chemical energy is released during the occurrence of chemical reaction.Reactions wherein energy is given out in the form of heat is called exothermic reactions.
Chemical energy can be converted to other forms of energy like electrical energy during the process of electrolysis and to thermal energy as in the case of thermal engines.
It can also be converted to kinetic energy during explosions . It is stored in batteries, coal, biomass, food, vehicle air bags,etc.During digestion chemical energy is converted to mechanical and thermal energy.
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which temperature scale avoids negative temperatures
Answer:
See below:
Explanation:
Hello! My name is Galaxy and I will be helping you today. I hope you are having a nice day.
There are 3 main ways to measure temperatures, you have Celsius, Fahrenheit, and Kelvins.
Celsius and Fahrenheit are main ways to measure heat in non-scientific terms, althought they are used sometimes when needed.
Kelvins are used for Science as they are precise and can deal with temperatures that are super hot or super cold.
The lowest temperature in Kelvins is 0 degrees Kelvin, also known as Absolute Zero. There are no temperatures above that. So the answer to your question would be Kelvins.
Identify the location of oxidation in an electrochemical cell.
Answer:
Anode
Explanation:
Electrochemical cells have two conductive electrodes, called the anode and the cathode. The anode is defined as the electrode where oxidation occurs.
Can you use volume alone to predict whether an object will sink or float? Explain your answer
Answer:
Can volume alone be used to predict whether an object will sink or float? -No, you need both mass and volume to find its density to see if it can float.
how do you write the names and formulas for ionic compounds with polyatomics
Here are some steps i know from my teacher:
When you write a formula from a home you must follow these rules
1) Write down the name you must follow these rules
2)Write down the symbols for the elements and group in the compound of elements
3)Write down the valency
4)Adjust the number of atoms of each element or group valency is the combining capacity of elements with one another.
What is the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen
True or false? Simple molecular substances contain delocalised electrons.
Answer:false
Explanation:
rutherford and JJ thompson both contributed to what we know about the structure of the atom. What experiments did they perform and how did it change what we know about the structure of the atom? Furthermore describe the structure of an atom using only two words
Answer:
J.J. Thomson's experiments with cathode-ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. I would describe the structure of an atom as the plum pudding model.
Phân tử khối của CO² gấp mấy lần phân tử khối khí H²
Explanation:
DCO2/H2 = 44/2 = 22............................
what is the potential energy of an object is its internal energy due to random motons of its individual molecules
Answer:
Thermal energy consists of the total internal kinetic energy of an object due to the random motion of its atoms and molecules. It is related to heat and temperature.
Explanation:
Help me please! I’m
In my own breakout room doing this like the other kids NOW HELP!
Answer:
Sun
Explanation:
Answer:
earth
Explanation:
Can someone help me with this chemistry question please?
C. Energy use
please mark me a brainlist
what is the name of an orchestra that performs the ceremonial music of the royal courts and templates of cambodia
a.ankor wat
b.oneat
c.pinpeat
d.samphor
Answer:
pinpeat
According to 3 sources
The pinpeat (ពិណពាទ្យ) orchestra or musical ensemble performs the ceremonial music of the royal courts and temples of Cambodia. The orchestra consists of approximately nine or ten instruments, mainly wind and percussion (including several varieties of xylophone and drums)
Explanation:
PA BRAINLIEST