13p 14n what is this element
Answer:
it is an isotope of Aluminum
Explanation:
Isotopes are the ones with the same number of protons but different number of neutrons.
The normal Aluminum is 13p+ and 13n. (13+13)
How many Noble gases are there?
Answer:
six noble gases
Here are five of the six noble gases: helium, neon, argon, kypton and xeon. They're all colourless and transparent. Krypton and xeon form compounds only with difficulty. Helium, neon and argon don't form compounds at all.
Answer:
There are in total 6 noble gases in the periodic table.
Namely,
1. Helium
2. Neon
3. Argon
4. Krypton
5. Xenon
6. Radon
Suppose you have an ice cube with mass of 8.00 g at a temperature of 295 K. If that ice cube is heated until it is completely converted to steam at 373 K how many joules of heat must be added ?
Explanation:
In order to be able to answer this question, you must know the value of water's enthalpy of fusion, ΔHfus
How many significant figures are in this measurement: 1,250,500
what element is 1s222s222p663s223p664s22
Answer:
Ca
you have too many numbers in there
Explanation:
How many atoms of oxygen are in 75.6g of silver nitrate (AgNO3)?
Answer:
1.50x10^21 molecules O2
Explanation:
Give a situation in life when you've experienced resonance.
Ground water, the largest source of fresh water, is stored in bodies of rock and or sediment
a. porosity
b. sediment
c. particles
d. aquifers
i dont even know what this means
Answer:
particles
Explanation:
oof oof oof oof oof oof oof
How many molecules are in 0.89 moles of CO2
Which statement best describes the relationship between changes in air pressure and wind speeds?
Answer:
air pressure is the air around you that ahs weight and it presses everytime you touch , wind speeds is the amount of wind formedin weather
Explanation:
Answer: The greater the difference in pressure, the faster the winds. When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure
Explanation: Hope this helps :)
500.0 mL of a gas is collected at 745 K. What will the volume be at standard temperature?
Answer:
183.22mL
Explanation:
Using Charles law equation, which is as follows:
V1/T1 = V2/T2
Where;
V1 = initial volume (mL)
T1 = initial temperature (K)
V2 = final volume (mL)
T2 = final temperature (K)
Note that standard temperature of a gas is 273K.
Hence, based on the provided information, V1 = 500.0mL, T1 = 745K, V2 = ?, T2 = 273K
Using the formula; V1/T1 = V2/T2
500/745 = V2/273
Cross multiply
V2 × 745 = 500 × 273
745V2 = 136500
V2 = 136500/745
V2 = 183.22
At standard temperature (273K), the new volume will be 183.22mL.
Answer:
183 ml
Explanation:
1.65g of zinc is used to make 8g of zinc iodide. How much iodine is required for this reaction?
Answer:
6.45 g of iodine, I₂
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
Zn + I₂ —> ZnI₂
Next, we shall determine the mass of Zn and I₂ that reacted from the balanced equation. This can be obtained as follow:
Molar mass of Zn = 65 g/mol
Mass of Zn from the balanced equation = 1 × 65 = 65 g
Molar mass of I₂ = 127 × 2 = 254 g/mol
Mass of I₂ from the balanced equation = 1 × 254 = 254 g
SUMMARY:
From the balanced equation above,
65 g of Zn reacted with 254g of I₂.
Finally, we shall determine the mass of f I₂ needed to react with 1.65 g of Zn. This can be obtained as follow:
From the balanced equation above,
65 g of Zn reacted with 254g of I₂.
Therefore, 1.65 g of Zn will react with = (1.65 × 254)/65 = 6.45 g of I₂.
Thus, 6.45 g of iodine, I₂ is needed for the reaction.
Based in your knowledge of diatomic molecules, predict the decomposition of water. Note that the reaction is NOT balanced. Choose the correct one.
H2O = H + O
H2O = H2 + O2
H2O = H + O2
H2O = H2 + O
Answer:H2O = H2 + O
Explanation:
the structure and bonding of gold?
Answer:
metallic bonding
Explanation:
since it is a metal gold forms metalllic bonding.
Answer:
metalic bonding
Explanation:
Use the periodic table to determine which of the
following could be an isotope of bromine (Br).
Check all that apply.
Z = 79, A = 196
Z = 35, A = 79
A = 79, N =44
D Z = 44, N = 44
DONE
A small beaker contains 50 milliliters of water
at 20°C. If three sugar cubes are placed in the
beaker, they will eventually dissolve. Which
action would speed up the rate at which the
sugar cubes dissolve?
F) Use less water initially.
G) Transfer the contents to a larger beaker.
H) Cool the water and sugar cubes to 5°C.
J) Heat and stir the contents of the beaker.
what is the product for the synthesis reaction Na+O2
1-NaO
2-NaO2
3-Na2O
4-Na3O2
5-Na2O3
6-Na2O2
Conduction does not work well in metals.
True or False
Question :
Conduction does not work well in metals. True or FalseAnswer:
False, because:
Thermal conduction is defined as the transport of energy due to random molecular motion across a temperature gradient. It is distinguished from energy transport by convection and molecular work in that it does not involve macroscopic flows or work-performing internal stresses.
Or in other words, Conduction is the transfer of heat between two parts of a stationary system, caused by a temperature difference between the parts.
If this helped, you're welcome! If you would, please make me brainliest.
- niaxfandoms (ig and yt)
4 points
9. Name the scientists that played a major role in the development of cell theory. *
Help! “Name 2 elements that can form the same type of ion as calcium. Explain”
Answer:
Beryllium and magnesium will show similar chemical reactions as calcium. Since these elements belong to same group II and also have two electrons in their outermost shell like calcium.
What is the amount of aluminum chloride produced from 40 moles of chlorine and excess aluminum?
Answer: Molar mass of Al = 26.98 g/mol
mass of Al = 12 g
mol of Al = (mass)/(molar mass)
= 12/26.98
= 0.4448 mol
According to balanced equation
mol of AlCl3 formed = moles of Al
= 0.4448 mol
Answer: 0.445 mol
hope this help boo❤️❤️❤️
Explanation:
How does solar energy affect climate?
Answer:
It makes it things grow and it is renewable energy meaning that its infinite and will help life grow fruits grass and with that comes how animals live including us human how does it effect climate it make thing warm and sometimes hot and can cause thunder to make the place cool down sorry if wrong
Electrons are important in chemical reactions. Since the elements in a family tend to behave similarly in chemical reactions, one may conclude that:
Answer:
One may conclude that they have an identical number of electrons in their outermost shell, therefore the can be substituted for one another.
Explanation:
Elements in the same family tend to behave similarly in chemical reactions because they have similar number of valence electrons in their outermost shell and they also have similar chemical properties.
Valence electrons are responsible for reactions between elements. The valence electron makes it possible for atoms to combine and react, therefore, elements in a family behave similarly in chemical reactions because they have an identical number of electrons in their outermost shell.
for an atom to be considered electrically neutral it must contain the same number of
The empirical formula of a compound is CH. Its molecular mass is 70.14 g.
What is the factor? |
What is its molecular formula? (Write your formula without any space A2B3)
Which is a mixture
H20
Salad
Table salt
Answer:
salad is a mixture this is the answer of the question
please mark ne has a brainliest
5) Check all the following boxes that are true about electrons
A) The number of electrons must be the same as the number of protons.
B) Changing the number can make atoms unstable.
C) They are mostly located in the nucleus (center) of the atom.
D) Electrons must be removed from the outer rings before they can be removed from
the inner rings.
E) The inner shell has a maximum number of 2 electrons
Other:
Answer:
Explanation:
A isnt true bc there can be isotopes
B: Yes that's true
C: C is false: only protons and neutron live in the nucleus
D that is true: we can see that with ions
E that is true
Escucho activamente a mis compañeros y compañeras, reconozco otros puntos de vista, los comparo con los míos y puedo modificar lo que pienso ante argumentos más sólidos.
Answer:
Explanation:
Vale, y entonces que ahora???
Solution made up of a
Answer:
solute and solvent
Explanation:
Because solutes dissolves in solvent to form a solution
NEED HELP PLEASE. NOW
What pressure is exerted by 0.75 moles of a gas at 25°C
in a container with a volume of 1.5 L?
Answer:
1,239,284pa
Explanation:
Assuming it's an ideal gas we use
PV=nRT
P=nRT/V
then we convert our Temperature into Kelvin
T=25+273.15 =298.12K
we convert our volume into M cubed
1.5L =0.0015 cubic meter
P=nRT/V
P= (0.75×298.12×8.314)/0.0015
P = 1,239,284pa