Answers
Answer:
It's gotta be the third answer
Explanation:
Hope this helpped!
Related Questions
I WILL MARK BRAINLY-EST Do you think the way we perceive food in our culture supports the guidelines in MyPlate? Explain your
answer
Answers
What type of bond is between NaCL?
Answers
Answer:
Ionic Bonds
Explanation:
Ionic bonds usually occur between metal and nonmetal ions. For example, sodium (Na), a metal, and chloride (Cl), a nonmetal, form an ionic bond to make NaCl.
___is a measure of the change in velocity of a
moving object.
THIS IS URGENT ! Please fill in the blank
Answers
What increases the concentration of H+ in water ?
Answers
Answer:
Acid
Explanation:
Non-neutral pH readings result from dissolving acids or bases in water. An acid is a substance that increases the concentration of hydrogen ions (H+) in a solution, usually by having one of its hydrogen atoms dissociate.
A. An atom neutral (one with 0 extra charge)?
Answers
Answer:
Neutron is the correct answer.
Why was the creation of element 114 so special?
Answers
Answer:
It is classified as a metal and is expected to be solid at room temperature.
Explanation:
not sure but i guess it is that
why are metals generally good conductors of electric current?
Answers
Answer:
(Hope this helps can I pls have brainlist (crown)☺️)
Explanation:
Because the atoms in metals form a matrix through which outside electrons may easily travel, metals are good conductors of electricity and heat. They generate a sea of electrons around the positive nuclei of the interacting metal ions, rather than circling their particular atoms.
The free flow of shared electrons can carry an electric current through a metal. Carbon atoms join with iron atoms to create bonds.
What is the difference between Eukaryote and Prokaryote cells?
Answers
pls make me brainliest
Which of the following statements about absolute zero is correct?
Answers
it is a 0 degrees on the Kelvin scale
it is also the lowest on the thermometer
also the particles stop moving and all disorder disappears.
A beaker contains an acidified copper sulphate solution.A copper plate and a carbon plate is connected to postive terminal to battery whereas carbon rod is connected to negative terminal of battery.What will you observe when an electric current is passed through this setup for a considerable time
Answers
for which elements are outer electrons and valence electrons the same?
Answers
Answer:
The number of electrons in the outermost shell of a particular atom determines its reactivity, or tendency to form chemical bonds with other atoms. This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons.
Explanation:
Elements of same group have same number of valence electrons and similar physical and chemical properties.
What are groups in periodic table ?A periodic table is classified into different columns and rows. The vertical columns in the table are called groups and the horizontal rows are called periods.
From left to right, the atomic number of elements increases by one and atomic size increases. Down a group, the number of electrons and atomic size as well increases.
Elements of same groups have same number of outer electrons or valence electrons. They show similarities in chemical and physical properties.
For example, lithium and sodium are in the first group. They both have one valence electron.
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the elements on the periodic table are arranged in order of increasing
Answers
Answer:
atomic number
Explanation:
the primary difference between enhancers and promoter-proximal elements is that enhancers _____.
Answers
Answer:
Enchancers are transcription factors
I hope that helps you
what does not happen when the temperature is increased ?
Answers
What mass of aluminium is needed to react with 640g of iron oxide
Answers
Answer:
13.5g
Explanation:
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 138.8g of aluminium is needed to react with 640g of iron oxide.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Mathematically, the balanced equation can be written as
3Fe[tex]_2[/tex]O[tex]_3[/tex] + 4Al [tex]\rightarrow[/tex] Al[tex]_2[/tex]O[tex]_3[/tex] + 6Fe
number of moles of iron oxide= 640/159.6
=4.01
number of moles of aluminium =(4/3)×4.01
=5.34moles
mass of aluminium =5.34×26
=138.8g
Therefore, 138.8g of aluminium is needed to react with 640g of iron oxide.
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omg y'all pls so much help me!!!
1. H2SO4
2. MGNO3
their %
Answers
H: 1 x 2 = 2
S: 32 x 1 = 32
O: 16 x 4 = 64
98amu
H: 2/98 x 100 = 2%
S: 32/98 x 100 = 33%
O: 64/98 x 100 = 65%
MGNO3 (I think you meant Mg(NO3)2 aka Magnesium Nitrate. So this might be wrong because I did the version you sent instead of what I thought you might mean.)
Mg: 24 x 1 = 24
N: 14 x 1 = 14
O: 16 x 3 = 48
86amu
Mg: 24/86 x 100 = 28%
N: 14/86 x 100 = 16%
O: 48/86 x 100 = 56%
How could you break down the compound calcium carbonate into the elements that make it up ?
A. by melting
B. by crushing
C. with filter
D. with chemical changes
Answers
Answer:
A. By melting
Explanation:
You can break it down by thermal decomposition which is basically melting it and thats because many metal carbonates can take part in thermal decomposition reactions.
How many molecules of H2O are there in 200,000,000L of gas at STP?
Answers
H2O,200,000,000L,STP = 65.05999898g
the diagram of paper chromatography
Answers
I hope that the attachment helps you..
What’s a conjugative Bas of OH-
Answers
Answer:
the answer is O²- hopefully
A red car and a black car begin to accelerate from rest at the same time. The red car accelerates at a constant rate of 3 meters per square second. The motion of the black car is shown in the graph below.imageWhich of the following statements correctly compares the acceleration of the two cars?A.While the cars are accelerating, the red car accelerates faster than the black car.B.While the cars are accelerating, the black car accelerates faster than the red car.C.The red car only accelerates faster than the black car for the first second of acceleration.D.The black car only accelerates faster than the red car for the first second of acceleration.
Answers
That car moves or accelerates faster which has the higher speed.
If the red car accelerate at higher speed than black car then the red car reach first on the destination but if the black car moves with higher speed than red car then the black car reach its destination earlier than the red car.
The conclusion can be drawn when the image is present or any data but there is no data or image present which provides us accurate information so we can conclude logically that car which moves at higher speed will move faster than the other car.
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how to keep apples from browning without lemon juice?
Answers
Answer:
eat
Explanation:
eat the dang apples
How do the isotopes hydrogen-2 and hydrogen-3 differ?
A. Hydrogen-2 has three protons.
B. Hydrogen-2 has no protons.
C. Hydrogen-3 has one more electron than hydrogen -2.
D. Hydrogen-3 has two neutrons.
PLS SOMEONE HELP
Answers
Answer:
C hydrogen 3 has 0one more electron than hydrogen 2
what is meant by pure substance????
Answers
why do atmospheric carbon dioxide levels fluctuate during the year?
Answers
Answer: The amount of CO2 found in the atmosphere varies over the course of a year. Much of this variation happens because of the role of plants in the carbon cycle
The missing box would be the number and this is a form of decay.
please help mark brainliest
Answers
Answer:
alpha decay or particle
Explanation:
which temperature scale avoids negative temperatures
Answers
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.
I am an alkali metal located in the third period of the periodic table. Who am I?
Answers
Answer:
Magnesium
Explanation:
It's an alkali metal and is in the third period on the period table. I'm sure
The alkaline earth metal found in period 3 of the periodic table is magnesium.The lightest structural metal is magnesium (Mg), an alkaline-earth metal from Group 2 (IIa) of the periodic table.
I am an alkali metal located in the third period of the periodic table. Who am I?
Six chemical elements in Group 1, the periodic table's leftmost column, make up the alkali metals.They are francium (F), cesium (Cs), rubidium (Rb), potassium (K), sodium (Na), and lithium (Li) (Fr). One of the chemical elements in the third row of the periodic table of the chemical elements is referred to as a period 3 element. Magnesium is regarded as a metal because it is a member of group2.Acid and metals react to produce salt and hydrogen gas.As a result, magnesium interacts with diluted hydrochloric acid to produce magnesium chloride (salt) and hydrogen gas. Magnesium is a silvery, light metal that makes up 2% of the Earth's crust but is not present in nature.Only in combination with other elements like carbon, calcium, and oxygen, as in the common mineral dolomite, could this versatile element naturally arise. Magnesium is a cofactor in more than 300 enzyme systems that affect a variety of biochemical processes in the body, including as protein synthesis, blood glucose control, blood pressure regulation, and muscle and nerve function [1-3].Magnesium is necessary for the oxidative phosphorylation, glycolysis, and generation of energy. Magnesium supports muscle and neuron function as well as energy synthesis in the body, among many other vital functions.Typically, low magnesium levels don't result in any symptoms.On the other hand, persistently low levels can raise your risk of osteoporosis, type 2 diabetes, high blood pressure, and heart disease. For the majority of individuals, daily doses under 350 mg are safe.The adverse effects of magnesium can include nausea, vomiting, diarrhea, and upset stomach in some people.Magnesium is POSSIBLY SAFE UNTIL TAKEN IN VERY HIGH AMOUNTS (more than 350 mg daily).To learn more about magnesium refer
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Samantha is investigating the densities of several liquids. Which action is the result of her creative thinking ?
Answers
Answer:
A. Poe
Explanation:
pagmali sorry na Lang
A student wants to perform an experiment to study the relationship between the temperature and pressure of an enclosed gas. In one or two sentences, describe two assumptions that must be made in performing this experiment.(2 points)
Answers
An assumption that must be made when studying the relationship between pressure and temperature is that the gases do not interact with each other.
An experiment seeks to understand the effect of one variable on the other. The relationship between the pressure and temperature of a gas is commonly studied.
In an experiment to determine the relationship between temperature and pressure of a gas, the following assumptions must be made;
The gases molecules only occupy only a negligible volume compared to the total volume of the gas.The gas molecules do not interact with each other.Learn more: https://brainly.com/question/6111443