Answer:
The Alkali metals
Explanation:
The alkali metals react with the nonmetals in Group VIIA (F2, Cl2, Br2, I2, and At2) to form ionic compounds or salts. Example: Chlorine reacts with sodium metal to produce sodium chloride, table salt. Because they form salts with so many metals, the elements in Group VIIA are known as the halogens.
Alkali metals are the type of metal that can react with metals to form salts. They form ionic compounds or salts when reacting with non-metals.
What are alkali metals?Alkali metals are the six elements of group 1 of the periodic table. thee metals are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
The main characteristics of alkali metals are:
They are brittle, metallic bonding causes them to be soft metals.Both their melting and boiling points are low.They are metals that are quite reactive.Ionization energy is the force needed to eject an electron from the outermost shell.Alkali metals interact to generate ionic compounds or salts. As an illustration, sodium metal and chlorine react to form sodium chloride or table salt.
Thus, alkali metals form salt when reacting with metals.
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what will happen an unboiled egg is placed in the beaker of fresh water and salt water
Answer:
Explanation:
1
What does the speed of a sound depend on?
A.
the medium through which it travels
B.
the source from which it is emit
C.
the volume of the sound
D.
the pitch of the sound
Which statement best describes the weather shown by the blue triangles going one way and the red semicircles going the other way on a line on a weather map?
A cold front can cause heavy rain, thunder, and lightning.
A stationary front may produce rainy or snowy weather for several days.
An occluded front can cause light to heavy precipitation that may last several days.
A warm front brings drizzly weather.
Answer: The statesmen that best describes the weather shown by the blue triangles going one way and the red semi-circles going the other way on a line in the weather map is “warm front brings drizzly weather.
Answer:
A stationary front may produce rainy or snowy weather for several days.
Explanation:
What happens to the ice pack over time?
Answer:
it melts?
I don't really know but I have 60% that I think the answer is correct
please help i will mark brainlist
Answer:
432cm³
Explanation:
Given parameters:
Length = 12cm
Height = 6cm
Width = 6cm
Unknown:
V = ?
Solution:
We have been given that;
V = L x W x H
So;
V = 12cm x 6cm x 6cm = 432cm³
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.
why are cells small?
Answer:
you know what i really dont know but imagine if they were huge
Explanation:
Question 8 of 10
What is R in the ideal gas law equation?
A. The kinetic energy of the gas
B. The number of moles of the gas
C. The molar mass of the gas
D. The ideal gas constant
SUBMIT
Answer:
D
Explanation:
The ideal gas law is: pV = nRT, where n is the number of moles, and R is universal gas constant. The value of R depends on the units involved, but is usually stated with S.I. units as: R = 8.314 J/mol·K
In order to prove that the Law of Conservation Mass is obeyed, what are the coefficients
needed to balance the following reaction:
C3Hg +
02
1
CO2 +
H2O
Answer: [tex]C_3H_8+5O_2\rightarrow 3CO_2+4H_2O[/tex]
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The balanced chemical equation for combustion of propane will be :
[tex]C_3H_8+5O_2\rightarrow 3CO_2+4H_2O[/tex]
Why is most of the Earth’s fresh water unavailable?
Answer:
2.5% of the earth's fresh water is unavailable: locked up in glaciers, polar ice caps, atmosphere, and soil; highly polluted; or lies too far under the earth's surface to be extracted at an affordable cost.
Explanation:
Hydrazine, N2H4, and hydrogen, H2O2, have been used as rocket propellants. They react according to the equation:
H2O2 + N2H4 → N2 + H2O
a. How many moles of N2 are formed from 0.0250 moles of N2H4? (0.0250)
b. How many moles of H2O2 are required if 1.35 moles of H2O is to be produced? (0.675)
c. How many moles of H2O are formed if 1.87 moles of N2 is produced? (7.48)
Explanation:
The equation of the reaction is;
H2O2 + N2H4 → N2 + H2O
Upon balancing the reaction, we have;
N2H4 + 2H2O2 → N2 + 4H2O
a. How many moles of N2 are formed from 0.0250 moles of N2H4?
From the equation of the reaction;
1 mol of N2H4 produces 1 mol of N2
0.0250 mol of N2H4 would produce x mol of N2
1 = 1
0.0250 = x
x = 0.0250 * 1 / 1 = 0.0250 mol
b. How many moles of H2O2 are required if 1.35 moles of H2O is to be produced?
From the equation of the reaction;
2 mol of H2O2 produces 4 mol of H2O
x mol of H2O2 produces 1.35 mol of H2O
2 = 4
x = 1.35
x = 1.35 * 2 / 4 = 0.675 mol
c. How many moles of H2O are formed if 1.87 moles of N2 is produced?
The relationship between H2O produced and N2 is;
For every 1 mol of N2 produced, 4 mol of H2O is produced
1.87 mol of N2 produced, how many moles of H2O is produced?
1 = 4
1.87 = x
x = 1.87 * 4 / 1 = 7.48 mol
At what temperature will equal masses of HCl and NH4CI dissolve in 100g water?
Explanation:
NH4Cl at 90°C _.70 a ... m aximum amount of solute that will dissolve at that specific temperature (no ... A mass of 100 g of NaNO3 is dissolved in 100 g of water at 80°C. Is the ... SO2, NH3, HCl.
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An adult dog has less inertia than a puppy.
True
False
Answer: True
Explanation: Hopes this helps- Lily ^_^
An ionic bond always forms between _____ ion with a positive charge and _____ ion with a negative charge.
Answer:
Cation and anion
Explanation:
Positive ion is known as cation and negative ion is known as anion
What particles are contained in the nucleus of an atom?
O electrons & protons
O neutrons & electrons
O neutrons & protons
O pixels & electrons
would using a strainer be filtration?
Answer:
To some extent, yes
Explanation:
How many grams are present in 2.5 moles of silicon
Answer:
70.21375
Explanation:
rounded to he nearest tenth place 70.2
why is it important that the level of the sea water does not go above the level of the filter paper
Answer:
The water (the substance) that passes through the filter paper is called the filtrate. If your mixture is a solution, such as salty water, then filtering will not separate the salt from the water. Instead, by heating the soluton the solvent (water) evaporates leaving the solid (salt) behind.
Explanation:
what is the molar mass of p4010? solve
Answer:
283.889044 g/mol
The molar mass of P4 O10 is 283.889044 g/mol. Adding the molar mass of each element gives us the molar mass of the compound.
Explanation:
What will be the mass of 9.95 liters of propane gas (C3H8) at STP?
Answer:
19.5g
Explanation:
Given parameters:
Volume of propane gas = 9.95L
Unknown:
Mass of propane gas = ?
Solution:
To solve this problem, find the number of moles first.
At STP;
22.4L of gas makes up 1 mole
9.95L of gas will have a [tex]\frac{9.95}{22.4}[/tex] = 0.44mole
So;
Mass of propane gas = number of moles x molar mass
Molar mass of propane = 3(12) + 8(1) = 44g/mol
Mass = 0.44 x 44 = 19.5g
help me please asap ...........................................
How many chickens would it take to kill an elephant?
Answer: One chicken with a bomb
Answer: 26,000 chickens
Explanation:
The melting point of an ionic compound is likely to be (answer) a molecular compound.
options:
higher than
lower than
the same as
Answer:
Higher than
solution and the liquid state
hard
Explanation:
It has been an expense for the Australian government (taxpayers) to try to control the rabbit population
Question 4 options:
True
False
Answer:
true
Explanation:
It has been an expense for the Australian government (taxpayers) to try to control the rabbit population. This statement is true.
Why did the rabbit population grow so quickly in Australia?Aside from the lack of natural predators on the continent, their success is aided by rapid reproduction: They can have more than four litters a year, each with up to five kits (baby rabbits).
The European wild rabbit has become an invasive pest in the southern two-thirds of Australia. They have an impact on natural environments, primary production, as well as townships and infrastructure.
The government turned to biocontrol in the 1950s. They released rabbits infected with myxoma, a virus that only affects rabbits, into southeastern Australia.
Thus, It has been an expense for the Australian government (taxpayers) to try to control the rabbit population. This statement is true.
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i need help i hate multi selects. 100 points please let me know
Answer:
d would be both liquids and gasses
Explanation:
Answer:
A. Gases
B. Solids
C. Gases
D. liquids and solids
So basically all ur answers are right except D
Explanation:
Brainlist?
Hi! I produce proteins inside the cell. What am I?
Answer:
ribosome is the cell
Explanation:
hsduuejxkwnckwnirj
List three accessory organs in the digestive system.
Which one of the following is a chemical property?
A. A wood block is less dense than water
B. Gold bar is shiny
C. Bubbles form when baking soda and vinegar are mixed.
D. Water turns from liquid to gas at 1000C.
pls help thx
The forming of bubbles when baking soda and vinegar are mixed is a result of chemical property.
Chemical PropertiesChemical properties of materials are properties that are due to the chemical composition of the materials.
The formation of bubbles when baking soda is mixed with vinegar is a result of the evolution of carbon dioxide gas.
Baking soda reacts with vinegar to produce carbon dioxide and other products according to the chemical equation below:
NaHCO3 + CH3COOH → CO2 + H2O + CH3COONa
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Problem
Atoms of which two elements have a combined total of 39 protons?
A Nickle, Ni, and copper, Cu
B None of these
CPotassium, K, and calcium, Ca
DNitrogen, N, and oxygen, O
Submit Answ
Type here to search
Answer:
C) Potassium, K, and calcium, Ca
Explanation:
Given pair of elements:
Ni and Cu
Potassium and Ca
Nitrogen and oxygen
Solution:
We know that number of protons and number of electrons are always equal and number of electron or number of proton is called atomic number.
Number of protons given elements:
Ni number of protons = 28
Copper number of protons = 29
Combine number of protons = 57
K number of protons = 19
Ca number of protons = 20
Combine number of protons = 39
Ni number of protons = 7
O number of protons = 8
Combine number of protons = 15
Thus, option C is correct.
Oxygen gas is at a temperature of 145 K when it occupies a volume of
1.45 Liters. To what temperature should it be raised to occupy a volume of 6.50
Liters? Show your work. (Express your answer in Kelvin)
Answer:650K
Explanation:
Answer: 650K (1.45/145 = 6.50/x)
Explanation: