Answer:
Elements in the same period have the same (number of electron shells)
Someone pls help me I will make you brain
Answer:
i guess the answer is..true
the ozone in troposphere protects the earth from ultra violet waves that may cause global warming
How do I know if a reaction is spontainous or not?
Answer:
i dont care to you
Explanation:
cause you are tuyo
the answer is this
Why is alchemy no longer accepted?
A. Alchemists were not able to turn other metals into gold.
B. Scientists used evidence, analysis, and experiments to disprove
alchemy.
c. Alchemy became less popular once Aristotle died.
O D. The discovery of radioactivity took people's attention away from
alchemy
i think the answer is B. scientists used evidence, analysis, and experiments to disprove Alchemy. apologies if its incorrect.
Convert SI units .68mm. =km
Convert 68 Millimeters to Kilometers (mm to km) with our conversion calculator and conversion tables. To convert 68 mm to km use direct conversion formula below.
68 mm = 6.8E-5 km.
You also can convert 68 Millimeters to other Length (popular) units.
- BRAINLIEST answerer ❤️✌
4. Balance the following equations (show work)
a.___H2(g) +___O2(g) →___H2O(1)
b.____Fe(s) +___O2(g)→___Fe2O3(s)
c.___Al(s) +___HCl(aq) →___AlCl3(aq) +___H2(g)
d.____CaCO3(s) +____HCl(aq) →____CaCl2(aq) +____CO2(g) +____H2O(1)
Answer:
a) 2H2+O2 = 2H²O
b) 4Fe+30²=2Fe²O³
c) 2Al+6HCl=2AlCl³+3H²
Emma strikes a match and sets some logs on fire. As the fire burns, which two forms of energy are released?
Answer:
Explanation:
There are changes in the chemical composition of the word.
There's light energy given off.
There's heat energy given up.
I will brainless who can answer this all pleaseeeeej
Answer:
1. False
2. True
3. False
4. False
5. False
6. True
7. True
8. not sure
9. True
10. False
Explanation:
Can someone find from which website this test is?
Answer:
Try quizlet, they have everything on there
Explanation:
the variable part of an amino acid is the __________.
answer: the variable part of an amino acid is the: SIDE CHAIN
is lithium a good or bad element? (explain why)
Answer:
Its good
Explanation:
It has power
Answer: The widespread occurrence of lithium in plants results in a wide, although low-level, distribution of lithium in animals. Lithium salts have complex effects when absorbed into the body. They are not highly toxic, although high levels can be fatal.
Explanation: Which means that lithium is a good element depending on levels.
What are essential and non-essential water uses?
What is the formula for Iron (3) Oxide?
Answer:
IT should be Fe2O3
Explanation:
Fe2O3
Answer:
Iron (III) Oxide = Fe2O3
the fact that matter is not created or destroyed in any chemical or physical change is called the
Answer:
Law of Conservation of Mass.
Is that Right?
Can someone please help me write a little 2 sentence answer to this for me, it would be so helpful and the first person to answer it will most definitely be marked brainlist.
Answer:
I think that it would be better to have smaller cells because smaller cells takes less energy to transport waste and generally more efficient to control than larger cells. It is better to have smaller cells because larger and fewer cells takes up more nutrients, but doesn't cover as many surface area. In the end, smaller cells are more efficient, cover more surface area, and moves faster than bigger cells.
Explanation:
I hope that this is the kind of answer you were looking for!
Tổng số hạt mang điện trong ion AB4 3- là 50. Số hạt mang điện trong nguyên tử A nhiều hơn số hạt mang điện trong hạt nhân nguyên tử B là 22.Cấu hình e lớp ngoài cùng của A là gì?
Which of the following is a physical change?
Dissolving salt in water
Digesting food
Burning wood
Oxidation
Someone pls help me I will make you brain
Answer:
c
Explanation:
Answer:
I don't know either
Explanation:
I am sorry i can not answer you
importance of solvay process
Answer:
It is in great demand by the glass industry, and it is important in the manufacture of textiles, soaps and detergents, numerous chemicals, paper, and iron and steel. It is also used as a water softener (household washing soda is a well-known form of sodium carbonate) and in the refining of petroleum.
Someone pls help me with this I will make you brain
Answer:
The answer should be primary pollutants from a stationary source.
Explanation:
Primary pollutants are emitted directly from a source and do not change in the atmosphere, and from a stationary source because manufacturing factories have a fixed location.
Hope this helped :D
Use your knowledge of valence electrons and how they affect bonds to figure out how carbon (Group 14) and oxygen (Group 16)
would be attached to one another. In carbon dioxide (CO2), how is the compound structured? (Use "-" to represent a single
bond and "=" to represent a double bond) (1 point)
C-O-O
O=C-O
C=O-O
O=C=O
Answer: D
Explanation:
O=C=O
Carbon is in group 14 having four valence electrons and oxygen is in group 16 having six valence electrons hence the correct structure of CO2 is O=C=O.
Carbon and oxygen are nonmetals. Nonmetals form compounds by sharing electrons in a covalent bond.Carbon, a group 14 element has four valence electrons while oxygen, a group 16 element has six valence electrons.
Carbon can share four valence electrons with two oxygen atoms in CO2 to form the structure O=C=O. In this way, all the atoms now obey the octet rule.
Learn more: https://brainly.com/question/865531
How many carbon atoms are represented by the model below?
A. 3
B. 2
C. 1
D. 4
Four students each measured the mass of 1.43g sample four times
Answer:
look up 4 divided by 1.43
Someone pls help me I will make you brain
Answer:
transmission clutches
Someone pls help me I will make you brain
Answer:
c
Explanation:
II and III
What is a unique quality of the halogens/halides?
Answer:
Halogens are highly reactive
Is carbon mixed with sand a homogeneous or heterogeneous mixture
Answer:
homogeneous
Explanation:
because I said so
A carbon mixed with sand is a heterogenous mixture.
What is heterogenous mixture?
Mixture is defined as a combination to two or more simpler substances.
There are two types of mixture
Homogenous mixture - A homogenous mixture is defined as a mixture of two or more component which is uniform throughout the mixture. They include water, air, steel etc.Heterogenous mixture - A heterogenous mixture is defined as a mixture of two or more phase which is not uniform throughout the mixture. They include sand and water, salt and oil etc. They are a non uniform mixture with visible or invisible particles.Thus, carbon mixed with sand is a heterogenous mixture.
To learn more about heterogenous mixture, refer to the link below:
https://brainly.com/question/24898889
#SPJ2
What is an electrolytic cell?
A. A cell with a negative cell voltage
OB. A cell with a spontaneous redox reaction
C. A cell with a positive cell voltage
D. A cell that has a salt-bridge connection
Answer:
A. A cell with a negative cell voltage
Explanation:
other answer is wrong
An electrolytic cell is a cell with a spontaneous redox reaction (option B).
What is an electrolytic cell?Electrolytic cell is an electrochemical cell that utilizes an external source of electrical energy to force a chemical reaction that would otherwise not occur.
An electrolytic cell converts electrical energy into chemical energy. The redox reaction in the cell occurs spontaneously and is responsible for the production of electrical energy.
Therefore, according to this question, option B is correct.
Learn more about electrolytic cell at: https://brainly.com/question/34404030
#SPJ2
subscripts in chemical formulas are used to indicate the relative proportions of the elements in a
Answer:
relative proportions of the elements in a chemical reaction
A molecule or a compound can easily be represented by their formula.Subscripts in chemical formulas are used to indicate the relative proportions of the elements in a compound.
What is chemical formula?A chemical formula represent the identity and number of elements in a molecule or compound. Each element in periodic table has their own symbols. For example, hydrogen is H, oxygen having O, N for nitrogen, Na for sodium etc.
These chemical symbols are came from the first one or two letters of the Latin names of the elements. The number of these elements in a compound is given as subscripts of their symbols.
For example, there are two hydrogens and one oxygen in water and the formula is H₂O. Similarly the formula of carbon dioxide is CO₂ where one carbon and two oxygens are present. In this way the compounds can be easily identified and distuinguished using their chemical formulas.
To find more about chemical formula, refer the link below:
https://brainly.com/question/29031056
#SPJ5
Why is boiling water considered a physical change
if one mole of na3po4·3h2o is heated extensively, how many moles of water are released?
When one mole of Na3PO4.3H2O is heated extensively, three moles of water are released.
The water molecules in Na3PO4.3H2O are called molecules of water of crystallization. These molecules are not covalently bonded to the Na3PO4 molecule. They are only loosely attached to the substance.
Strong heating will drive away these molecules of water of crystallization to give three moles of water in the product.
Hence, when one mole of Na3PO4.3H2O is heated extensively, three moles of water are released.
Learn more: https://brainly.com/question/14252791