Answer:
Nitrogen
Explanation:
N= is the symbol
electronic configuration
1s2 2s2 2p3
Which of the following is TRUE about a physical change in matter?
O A physical change changes the identity of the substance
O A physical change does not change the chemical formula of the substance
O A physical change has similar characteristics as a chemical change.
A physical change is a change in how the substances react with other substances.
Answer:
B. a physical change does not change the chemical formula of the substance
Explanation:
Physical change does not change the substance or identity of an object
The correct answer is physical change does not change the chemical formula of the substance.
What is a physical change?A physical change is one in which only the physical state of matter is altered. Its chemical characteristics have not changed. A physical change is usually brought about by increasing the temperature or exerting pressure, or both. The original state of matter is restored by reversing the condition, that is, lowering the temperature, lowering the pressure, or both.Physical changes, in other words, are reversible.Learn more about Physical change here:https://brainly.com/question/25014732
#SPJ2
which of these is a mixture? a.water b.sugar c.carbon dioxide d.popcorn and salt
Popcorn and salt as the mixtures are substances which are formed by mixing other substances
Find the volume of a cereal box that has the dimensions of 35.2 cm x 220 cm x 6.0 cm
Answer:
Volume = 35.2×220×6.0 = 46464 centimeters³
Explanation:
7) What is the density of sulfur dioxide, SO2, at
STP?
Answer:
The density of SO₂ is 2.858 g/L.
Explanation:
Given data:
Density of sulfur dioxide = ?
Given temperature = standard = 273 K
Given pressure = standard = 1 atm
Solution:
Formula used:
PM = dRT
P = pressure
M = molar mass
d = density
R = ideal gas constant
T = temperature
No we will put the values in formula
1 atm × 64.066 g/mol = d× 0.0821 atm.L/mol.K× 273 K
d =64.066 atm.g/mol /22.4133atm.L/mol
d = 2.858 g/L
The density of SO₂ is 2.858 g/L.
write the name of any two metalloids ?
Answer:
Germanium and Polonium
Explanation:
Can you please mark me brainliest since I was the first person to answer :p
Answer:
Boron and silicon are metalloids.
Hope it helps :)
How do you define medium and high level profession?according to class 8?
please give this answer quickly
Answer:
Answer: medium level profession can be defined as some one who has moved past entry level but isn't nearing the end . whereas high level profession means a person has moved past entry level and also has reached the end.
Answer:
medium level profession refers to the profession that can be carried out with the help of extra khowledge,skill and vocational training
higher level profession refers to the top level profession that requires higher education and special indeth tranning
Fe2O3 + _H2SO4 → _Fe2(SO4)3 + __H2O what are the coefficients
Answer:
Fe₂O₃ + 3H₂SO₄ → Fe₂(SO₄)₃ + 3H₂O
Explanation:
Step 1: Write out unbalanced reaction
Fe₂O₃ + H₂SO₄ → Fe₂(SO₄)₃ + H₂O
Step 2: Balance
We need the same number of SO₄²⁻ on each side
Fe₂O₃ + 3H₂SO₄ → Fe₂(SO₄)₃ + H₂O
Now we need the same amount of H⁺ on each side
Fe₂O₃ + 3H₂SO₄ → Fe₂(SO₄)₃ + 3H₂O
Determined from the sum of potential and kinetic energy in a substance
2 points
Heat
Potential Energy
Thermal Energy
Total Internal Energy
Kinetic energy
Answer:
heat.
hope i helps
Consider the data set displayed to the shows the results of change in temperature on the volume of gas. A ____would be the best type of graph do use to display this data.
A)line graph
B)scatter plot
C)bar graph
Answer:
line graph
Explanation:
i just did the instruction :)
Answer:
line graph
Explanation:
edge chemistry
Which phrase describes non-foliated rocks? only one!
have grains in parallel layers
include quartzite and marble
tend to split along their bands
form from crystallized magma
Answer:
include quartzite and marble
Explanation:
non-foliated rocks are
1. metamorphic rocks
2. they are formed in the surrounding of igneous rocks
3. The environmental condition of formation of non-foliated rocks are that temperature is very high
4. pressure is very low but equal from all direction on igneous rocks
5. The constituent material crystalizes to form large rocks in which atoms are tightly and closely packed. Due to this density of these rocks are also higher.
Example of such rocks are
Quartzite : Its constituent material are mineral quartz and metamorphosed sandstone
Marble : its constituent material are mineral calcite; metamorphosed limestone
Hence, include quartzite and marble is the correct choice.
Answer:
include quartzite and marble
Explanation:
When nitrogen is returned to the soil when dead plants decompose the interaction is between
Answer:
When nitrogen is returned to the soil when dead plants decompose, the interaction is between which two spheres?
Geosphere and biosphe
Explanation:
How many protons, neutrons and electrons does Chromium-51 have
Answer:
Chromium-51 has 24 protons, 28 neutrons, and 24 electrons.
Explanation:
The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.
The number of protons, neutrons, and electrons are Chromium-51 has 24 protons, 28 neutrons, and 24 electrons.
What are proton, neutron, and electron?Protons, neutrons, and electrons are charged particles present inside the atom. Atoms are the basic unit of all matter. They together constitute the matter.
Protons are positively charged particles and neutrons are neutral particles. Neutrons and protons are present inside the nucleus of the atom. And electrons revolve around the nucleus in the orbitals of the atom.
In a neutral atom, there are exactly as many electrons as protons. The total number of protons and neutrons in the atom's nucleus is equal to the mass number (M) of the atom.
Thus, Chromium-51 has 24 protons, 28 neutrons, and 24 electrons.
To learn more about proton, neutron, and electron, refer to the link:
https://brainly.com/question/13131235
#SPJ2
Which arrow represents the change of state described
above?
The diagram shows changes of state between solid,
liquid, and gas. The atoms of a substance lose energy
during a change of state. Before the change, the atoms
are close together but are able to slide past one another.
gas
a. M
b. N
c. P
d. Q
Answer:
Q
Explanation:
Answer:
Q
Explanation:
I just took it on ed
Consider the electron configuration 1s2 2s2 2p6 3s2 3p6 3d8 4s2? Which of the following statements is false?
A. There are 16 electrons on the third energy level.
B. This atom has 2 valence electrons.
C. There are 4 energy levels in the atom.
D. The next electron to be added will be in sublevel 4p.
An atom of titanium has 22 protons and 26 neutrons. If the atoms loses one electron, what will be the charge on the ion that forms?
A. +1
B. -1
C. +21
D. -21
An atom of titanium has 22 protons and 26 neutrons. If the atoms loses one electron, then the charge on the ion that forms is +1. Thus option A is correct.
What are protons?Protons are defined as a positively charged particles which are present in the nucleus of an atom.
Number of protons in an element nucleus is called atomic number.
Neutrons are defined as a neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen.
When an atom loses electrons it gain positive charge and become cation. When an atom gain electrons it gain negative ions and become anion.
Thus, an atom of titanium has 22 protons and 26 neutrons. If the atoms loses one electron, then the charge on the ion that forms is +1. Thus option A is correct.
To learn more about protons, refer to the link below:
https://brainly.com/question/1252435
#SPJ2
how many g are in 16822 mg?
Answer:
it is jues
Explanation:
1 know
A satellite's speed is 10,000 m/s. After 1 min, it is 5,000 m/s. What is the satellite's acceleration?
Answer:
- 83.33 m per second square
Explanation:
Initial velocity u = 10,000 m/s
Final Velocity v = 5,000 m/s
Time t = 1 minutes = 60 seconds
Acceleration a =?
[tex] \because \: a = \frac{v - u}{t} \\ \\ = \frac{5000 - 10000}{60} \\ \\ = \frac{ - 5000}{60} \\ \\ a = - 83.33 \: m {s}^{ - 2} [/tex]
what is the chemical formula for iron oxide
Answer:
Fe₂O₃
Explanation:
True or False: Positive ions have more electrons than protons
O True
O False
Answer:
If the atom has more electrons than protons, it is a negative ion, or ANION. If it has more protons than electrons,it is a positive ion.
Explanation:
so yes true
wich of the following is a unit of volume in the english system of mesurement
Answer:
uhh its gallon
Explanation:
Please Help! Please do not give me a random, gibberish answer or I will report you and give you a low rating therefore dropping your popularity. Also, if you don't know the answer you can put your guess in the comments. I will give a Brainliest and 50 points!
How much Na3PO4 can dissolve in 200 g of water at 40°C?
The ability for a substance to dissolve is affected by both temperature and pressure.
Temperature
As the temperature increases, the solubility of a solid solute also increases, as the solvent can hold more of the solute particles.
However, as the temperature increases for a gas, the solubility decreases. As the temperature increases, the gas molecules have more energy and are able to escape the solvent, causing the solubility to decrease.
Pressure
As the pressure increases on a solution containing a gaseous solute, the solubility of the gas increases. At higher pressures, there are more gas molecules above the solution, which are able to enter and dissolve into the solution.
Graph representing how temperature affects the solubility of various solids. At 40°C, Glucose has a solubility of ~130 g in 100 g of water while NaCl has a solubility of ~38 g in 100 g of water.
Answer:
The answer is 50 g
Explanation:
Hope that helps!
The answer to your question is 50 g
I need help on this question
Gold is used for jewelry because it is malleable. This means it can be easily molded into different shapes. What is this an example of? A. Physical change B. Chemical property C. Chemical change D. Physical property
Help!
Answer:
Physical change
Explanation:
Physical changes are changes affecting the form of a chemical substance, but not its chemical composition
select the correct answer
Help me please thank you
Answer:
When nitric acid combine with sodium hydroxide the salt formed is called sodium nitrate. option B
Explanation:
It is the strong acid strong base reaction. When acid and base react with each other salt and water are formed.
In given reaction nitric acid combine with sodium hydroxide base and form sodium nitrate salt and water.
Chemical equation:
HNO₃(aq) + NaOH(aq) → NaNO₃(aq) + H₂O(l)
Ionic equation:
H⁺NO₃⁻(aq) + Na⁺OH⁻(aq) → Na⁺NO₃⁻(aq) + H₂O(l)
Net ionic equation:
H⁺(aq) + OH⁻(aq) → H₂O(l)
The Na⁺(aq) and NO₃⁻(aq) are spectator ions that's why these are not written in net ionic equation. The water can not be splitted into ions because it is present in liquid form.
Spectator ions:
These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.
Which of the following types of evergy does an object have because of its motion chemical energy gravitational energy kinetic energy potential energy
Answer:
Because of motion an object has kinetic energy.
Explanation:
Kinetic energy:
The energy of an object during its motion is called kinetic energy.
When we exert a force on the object inorder to accelerate it the work is done. During this work energy is transferred and object is moving. The energy is thus called kinetic energy.
Formula:
K.E = 1/2 mv²
Chemical energy:
Chemical energy in the amount of energy which is released during the chemical reaction. For example when a coal is burn the chemical energy is release in the form of heat and the amount of energy released is depend upon the amount of reactant.
Gravitational energy:
It is define as the energy of object in relation with another object because of gravity. it is also called as gravitational potential energy.
For example:
The pen which is placed above the table has more gravitational potential energy as compared to the pen which on the ground.
Potential energy:
It is the energy of an object because of its position in relation with other object. In simple words it is the form of energy of an object due to its position.
Formula:
P.E = mgh
Convert 90.23 kPa into atm
Answer:
The answer is
0.89 atmExplanation:
To convert from kPa to atm we use the conversion
101.325 kPa = 1 atm
If
101.325 kPa = 1 atm
Then
90.23 kPa will be
[tex] \frac{90.23}{101.325} \\ =0.89050086... [/tex]
We have the final answer as
0.89 atmHope this helps you
How many protons and neutrons does Polonium-211 have?
Answer:
Protons: 84
Neutrons: 127
Explanation:
The number of protons is the atomic number. The number of neutrons can be found by subtracting the proton number (84) from the isotope number (211)
Polonium-211 is an isotope of polonium which has 84 protons and 127 neutrons.
What are isotopes?
Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.
Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number of electrons.
They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable
Unstable isotopes are radioactive and are called as radioisotopes.Some of these isotopes are man -made and hence also called as artificial isotopes.Every element has an isotope which is either man-made or natural .
Many properties of isotopes depend on mass which is measured in atomic mass unit. The difference in actual mass and mass number is called mass defect.
Learn more about isotopes,here:
https://brainly.com/question/27475737
#SPJ5
3. How do you find the volume of a cube?
Answer:
Side x Side x Side
Example: (4 x 4 x 4) inches = 64 cubic inches
Explanation:
What would happen if you mixed Acid with Water/Lava?
(or even fire)
Answer:
What happens when an acid is mixed with water?
Explanation:
When you mix acid with water, it's extremely important to add the acid to the water rather than the other way around. This is because acid and water react in a vigorous exothermic reaction, releasing heat, sometimes boiling the liquid. When you add water to acid, the water boils and the acid may splatter and splash.
