The study of chemicals is called chemistry.
When two elements react together to form a new compound is called a reaction.
When two-element join together to form a new compound is called synthesis.
[tex]C + O_2 --> Co_2[/tex]
The breakdown of a compound into two different elements is called decomposition.[tex]H_20 ----> H_2 + O_2[/tex]
The substitute of one element in the compound is called single displacement.[tex]Fe + H_2So_4---> FeSo_4+ H_2[/tex]
The substitute of two-element in the compound is called double displacement.[tex]BaCl + H_2So_4 + ---> BaSo_4 + HCl[/tex]
The burning of the element in the presence of oxygen is called a combustion reaction.[tex]C + O_2 ---> CO_2[/tex]
Hence, the answer is mentioned above.
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Which element would most likely bond with lithium & why?
Answer:
Fluorine is most likely to bond with lithium One lithium (Li) atom can combine with one fluorine (F) atom. Together, they make the formula LiF. Fluorine has seven electrons of it's own. Lithium gives up its one electron to make both atoms happy.
Answer:
Fluorine is most likely to bond with lithium One lithium (Li) atom can combine with one fluorine (F) atom. Together, they make the formula LiF. Fluorine has seven electrons of it's own. Lithium gives up its one electron to make both atoms happy.
Please I need help I can’t fail
un ejemplo de cambio físico ocurre cuando: a) horneamos pan dulce. b) endulzamos el agua de limón. c) freímos los huevos. d) tostados los granos de café.
Answer:
...
Explanation:
How many significant figures are in the value 0.00250 m?
Answer:
3 significant figures
Explanation:
Significant figures:
1) The given measurement have four significant figures 1234.
2) All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.
3) Zero between the non zero digits are consider significant like 104 consist of three significant figures.
4) Leading zeros are not consider as a significant figures. e.g. 0.07 in this number only one significant figure present which is 7.
5) The zeros at the right side e.g 2600 are also significant. There are four significant figures are present.
In given measurement (0.00250 m) number of significant figures are 3.
2,5 and 0
What is the smallest representative particle of an element?
Answer:
atom
Explanation:
The smallest representative particle of an element is an atom.
What are atomsAtoms are the fundamental building blocks of matter and the smallest unit of an element that retains the chemical properties of that element. Each atom consists of a nucleus at the center, composed of positively charged protons and neutral neutrons, surrounded by a cloud of negatively charged electrons.
Atoms combine to form molecules or ions through chemical reactions, but they themselves represent the basic structure and identity of an element. Each element has a unique number of protons in its nucleus, known as its atomic number, which determines its position on the periodic table and its distinct chemical properties.
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Hi! I produce proteins inside the cell. What am I?
Answer:
ribosome is the cell
Explanation:
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Determine the final temperature of sample with a specific heat of 1.1 J/g°C and a mass of 385 g if it starts out at a temperature of 19.5°C and 885 J of energy are added to it.
Answer:
T2 =21.52°C
Explanation:
Given data:
Specific heat capacity of sample = 1.1 J/g.°C
Mass of sample = 385 g
Initial temperature = 19.5°C
Heat absorbed = 885 J
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = Final temperature - initial temperature
885J = 385 g× 1.1 J/g.°C×(T2 - 19.5°C )
885 J = 423.5 J/°C× (T2 - 19.5°C )
885 J / 423.5 J/°C = (T2 - 19.5°C )
2.02°C = (T2 - 19.5°C )
T2 = 2.02°C + 19.5°C
T2 =21.52°C
A certain amount of gas at 25°C and at a pressure of 0.800 atm is contained in a glass vessel. Suppose that the vessel can withstand a pressure of 2.00 atm. What is the maximum temperature in Kelvin that the gas can have without bursting the vessel?
a. 745 K
b. 62.5 K
c. 298 K
d. 760 K
The maximum temperature : a. 745 K
Further explanationGiven
Gas at 25°C(298 K) and at a pressure of 0.800 atm
Final pressure = 2 atm
Required
Final temperature
Solution
Gay Lussac's Law
When the volume is not changed, the gas pressure in the vessel is proportional to its absolute temperature
[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]
Input the value :
T₂=(P₂T₁)/P₁
T₂=(2 atm x 298 K)/0.8 atm
T₂ = 745 K = 472 °C
What is the geometry for MgF2?
Answer:
espero poderte ayudar
Explanation:
Answer:
2FMg
Explanation:
MgF*2=2FMg
Which of the following statements regarding bond energies is FALSE?
Answer:where are the statements
Explanation:
What is the molecular formula for a compound that is 40.0% C, 6.6% H, and 53.4% O and the molar mass is 120.0g/mol?
Answer:
molecular formula of the compound is C₄H₈O₄
Explanation:
First the empirical formula of the compound is determined:
Divide the percentage masses by the molar mass of each element to determine the mole ratio;
Carbon, C: 40/12 = 3.33
Hydrogen, H: 6.6/1 = 6.6
Oxygen, O: 53.4 / 16 = 3.3
dividing through with the smallest ratio to obtain the simplest whole number mole ratios
C = 3.3/3.3 = 1
H = 6.6/3.3 = 2
O = 3.3/3.3 = 1
Therefore, the empirical formula is CHO
molecular formula/mass = n (empirical formula/mass)
120 g/mol = n( 12 + 1 * 2 + 16)
30n = 120
n = 4 therefore, the molecular formula = 4(CH₂O)
molecular formula of the compound is C₄H₈O₄
5. Determine if each statement is true or false about forming a hypothesis:
a. It must be long.
b. It is an educated guess.
c. It is in if…then format.
d. It must be testable.
e. It must start with I think.
Which statements describe the fossil record? Check all that apply.
There is very little fossil evidence for the first 4 billion years of Earth.
There is very little fossil evidence for the last 600 million years of Earth.
Most of the fossil evidence is from the first 4 billion years of Earth.
Most of the fossil evidence is from the last 600 million years of Earth.
The fossil record is complete.
The fossil record is not complete.
Answer:
A D F
Explanation:
look at attachment if you don't believe me
Identify processes that change matter to a liquid state
A skateboard with a mass of 1.4 kg is accelerated with a force of 11.9 N.
Problem
If resisting forces are ignored, what is the acceleration of the skateboard?
A O 13.3 m/s2
BO 8.5 m/s2
CO 0.12 m/s2
D 16.66 m/s2
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How is water used in human living? Give at least five examples.
The energy of the emitted electrons depends on the
1. exposure
2. frequency
3. intensity
of the light.
Answer:
2. Frequency
Explanation:
Edge 2021
The ____________________ two objects are from each other, the _____________ the force of gravity between them. fill in spaces
Answer:
Farther, lesser
Explanation:
The farther the two objects are from each other, the lesser the force of gravity between them.
The force of gravitational attraction between two bodies is inversely proportional to the distance between them.
This premised on the Newton's law of universal gravitation which states that "the gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distances between them".
So, the farther the distance, the lesser the gravitational attraction and vice versa.
What is the molar mass of nitrogen gas, N2(g)? How many moles of nitrogen
molecules are in 56 grams? Explain.
Answer:
28g/mol
2 moles of nitrogen are present
Explanation:
The molar mass is defined as the mass of a chemical when 1 mole of this substance is present and is used to convert mass of the substance to moles or vice versa. Is widely used in stoichiometry problems.
1 atom of nitrogen has a molar mass of 14g/mol. N₂(g) -The molecule that contains 2 atoms of nitrogen- has a molar mass of 28g. That is 28g/mol.
56g of N₂ are:
56g * (1mol / 28g) =
2 moles of nitrogen are presentWhat is the name of Na3N?
HELP PLEASEEEE !!!!
Answer:
the answer I's the first one
Through which medium would it be easiest to hear someone speaking to you?
Select one
-sea water
-concrete wall
-vacuum
-Air
Answer:airr
Explanation:
Humans have developed ways to increase the of their
environment. true or false
Answer:
True......................had to do this because we need atleast 20 letters
What is the percent yield of this reaction if 22.o g of Mgl2 is produced by the reaction of 25.0 g of Mg with 25.0 g of l2?
% yield = 80.719
Further explanationGiven
22.0 g of Mgl₂
25.0 g of Mg
25.0 g of l₂
Required
The percent yield
Solution
Reaction
Mg + I₂⇒ MgI₂
mol Mg = 25 g : 24.305 g/mol = 1.029
mol I₂ = 25 g : 253.809 g/mol = 0.098
Limiting reactant = I₂
Excess reactant = Mg
mol MgI₂ based on I₂, so mol MgI₂ = 0.098
Mass MgI₂ (theoretical):
= mol x MW
= 0.098 x 278.114
= 27.255 g
% yield = (actual/theoretical) x 100%
% yield = (22 / 27.255) x 100%
% yield = 80.719
Help me on both of those questions please
Answer:
Hey mate.....
This is your answer....
Explanation:
1. Evaporation
2. Liquid to solid
hope it helps you,
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Write down and Balance
the chemical equation
Hydrogen + Oxygen=Water
6 Li + Zn3(PO4)2 ------- > 2 Li3PO4 + 3 Zn
If 48.6 g of zinc is made, how many moles of lithium phosphate are also made? _______ moles
Moles of Lithium phosphate : 0.495
Further explanationGiven
6 Li + Zn₃(PO₄)₂ ------- > 2 Li₃PO₄ + 3 Zn
Required
Moles of Lithium phosphate
Solution
moles of Zinc(Ar=65,38 g/mol) :
= mass : Ar
= 48.6 : 65.38
= 0.743
From equation, mol ratio of Zn : Li₃PO₄ = 3 : 2, so mol Li₃PO₄ :
= 2/3 x mol Zn
= 2/3 x 0.743
= 0.495
Describe the changes to the coastline pictured above. Look particularly at North and South Monomy Island.
Where is the picture?
What will the formula of a diatomic element look like?
Answer:
or example, most samples of the elements hydrogen, oxygen, and nitrogen are composed of molecules that contain two atoms each (called diatomic molecules) and thus have the molecular formulas H2, O2, and N2, respectively. ... A molecule of sulfur is composed of eight sulfur atoms and is therefore written as S8.
What volume will a gas occupy at 325 K if it occupies 5.8 L at 376 K? Assume the moles and pressure of gas are held constant
A) 2.89 L
B) 3.76 L
C) 5.01 L
D) 6.73 L
Answer:
5.01 L
Explanation:
my guy i just took the test, it was this one
Which element is in the same period as Potassium (K) and in the same
group as Flourine (F)?
O A. Bromine (Br)
O B. Oxygen (O)
O C. Selenium (Se)
O D. Argon (Ar)
Answer:
A. Bromine (Br)
Explanation: