Why is there so much heat released following a combination reaction
Answer: When a combination reaction occurs between a metal and a non-metal the product is an ionic solid.
Explanation: Another hint(s): When magnesium burns in air, the atoms of the metal combine with the gas oxygen to produce magnesium oxide. This specific combination reaction produces the bright flame generated by flares.
1. I am in group two period three. What element am I?
A Ti
B, C
C. Ca
D. WE
Answer:
Ca
Explanation:
calculate the volume of 0.200 m cacl2 needed to produce 2.00 g of caco. there is excess of na2co3
Answer:
x100.
Explanation:
Na2CO3 (aq) + CaCl2(aq) → CaCO3 (s) + 2 NaCl (aq)
For example, if we use 2.00 g CaCl2 x 1 mole = 0.0180 mole CaCl2
111 g CaCl2
and mix it with 2.00 g Na2CO3 x 1 mole = 0.0189 mole Na2CO3
106 g.
AB + CD → CB + AD, where A and C are cations and B and
D are anions
Answer:
x100 this is the answer I didn't do explanation sorry for that
Using dimensional analysis How many mg are there in 8.75 X 107 kilograms?
Conversion factors:
[1000 g = 1 Kg]
[1000 mg = 1 g]
Can you please show the work
Answer:
8.75×10¹³ mg
Explanation:
From the question given above, we obtained:
Mass (in Kg) = 8.75×10⁷ Kg
Mass (in mg) =?
Next, we shall convert 8.75×10⁷ Kg to grams (g). This can be obtained as follow:
1 Kg = 1000 g
Therefore,
8.75×10⁷ Kg = 8.75×10⁷ Kg × 1000 g/1 kg
8.75×10⁷ Kg = 8.75×10¹⁰ g
Therefore, 8.75×10⁷ Kg is equivalent to 8.75×10¹⁰ g.
Finally, we shall convert 8.75×10¹⁰ g to mg. This can be obtained as illustrated below:
1 g = 1000 mg
Therefore,
8.75×10¹⁰ g = 8.75×10¹⁰ g × 1000 mg/ 1 g
8.75×10¹⁰ g = 8.75×10¹³ mg
Thus, 8.75×10⁷ Kg is equivalent to 8.75×10¹³ mg.
You pour a spoonful of salt into a glass of water. Explain what happens to the mass of the salt and the mass of the water.
Answer:
If you pour a spoonful of salt into a glass of water, the sodium will react with the water and increase the mass.
Explanation:
how many pounds are in 14.8 grams
Answer:
0.03262841
I tried, hope this helps :)
Answer:
0.032 lbs
Explanation:
Divide the mass value by 454.
PLEAZE HELP!!!
Calculate the volume of a liquid with a density of 5.35 g/mL and a mass of 62.0 g.
Answer to the proper significant figures and include the proper unit.
My answer was 11.6 mL, but it was wrong.
Answer:
V= 12mL
Explanation:
you had the right idea with your Significant figures however, when we divide we see that it requires 2 significant figures as our least amount. this is because when looking at our division, 62 has 2 sig. fig. while 5.35 has a total 3. when looking at your answer we see that you had a total of 3 sig. figures. so in actuakity you had to round up to 12 and not to the tenths because the decimal makes .6 count as your third sig fig.
A divergent plate boundary is defined as two plates moving toward each other
True or false
Answer:
FALSE
Explanation:
i have a question, what does a man have to do to get the love of his life.
A man have to get their friend bond with someone they like a lot closer. Then, if the man is ready to confess his feeling, try buying his love of his life their favorite flower or favorite candy/food.
hope this help-(even though im a girl ;v;)
A cell is a system
True
False
Answer: True
Explanation:
Tissues perform functions that are specializations of the normal function of individual cells.
Answer:
true
Explanation:
PLEASE HELP ASAP ONLY HAVE 10 MINUTES. A certain photon of light has a wavelength of 422 x 10 -9 m. What is the frequency of the light? Show work
Answer:
7.11 x [tex]10^{14}[/tex] Hz
Explanation:
The equation for converting wavelength to frequency is ν=c/λ, or the speed of light over wavelength. The speed of light is 3.00 x [tex]10^{8}[/tex], and our wavelength here is 422 x [tex]10^{-9}[/tex]. All we have to do now is substitute our given values:
[tex]\frac{3.00x10^{8} }{422x10^{-9}}[/tex]
After reduction, our answer comes out to be about 7.11 x [tex]10^{14}[/tex] Hz.
How many grams of silver nitrate are required to produce 0.25 mol of silver sulfide
Which is the electron configuration for nobelium (No)?
[Rn]7s25f14
[Rn]7s25f7
[Ne]3s23p7
[Xe]6s25d1
Answer:
[Rn]7s25f14
Explanation:
[tex][Rn]5f^{14}7s^2[/tex] is the electron configuration for nobelium (No).
Explanation:
The electronic configuration of an element is the distribution of its electrons in different energy levels around the atomic nucleus.It is written with help of an atomic number of an element.Given:
The element nobelium.
To find:
The electronic configuration of nobelium
Solution:
The atomic number of nobelium is 102.
The number of protons = Atomic number = 102
The number of electrons = Number of protons = 102
There are 102 electrons in atom nobelium and they will be filled according to the Aufbau rule that the electron will be filled in a subshell with lower orbital energy.
The electronic configuration of nobelium :
[tex][No]=1s^22s^22p^63s^23p^63d^{10}4s^24p^64d^{10}5s^25p^64f^{14}5d^{10}6s^26p^65f^{14}7s^2[/tex]
Or we can also write the above electronic configuration as:
[tex][No]=[Rn]5f^{14}7s^2[/tex]
[tex][Rn]5f^{14}7s^2[/tex] is the electron configuration for nobelium (No).
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Density is a physical property of a molecule that’s measured as mass per unit volume. (a) Given that density is usually expressed in the units of g/cm^3, calculate the density of a cube of plastic that has a mass of 2.331 g and an edge length of 1.500 cm (volume of a cube is V = l^3). (Show work pls + WILL MARK BRAINLIEST)
Answer:
0.690666... g/cm^3
Explanation:
density=mass/volume. mass is 2.331 g and using the length we can determine that the volume of the cube is 3.375 cm^3. 2.331/3.375= 0.6906666....
how to get rid of my sisterrrr
Answer:
You don't
Explanation:
Unless you ask your sister to
Ship her away (DO NOT ACTULLY DO THAT)
simply just ask her to leave you alone
could someone tell me if i’m correct
is chemistry notconcerned with exploring and inventing materials for use.
Answer:
no it's part of chemistry to play thing exploring OR not.
Explanation:
Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
I need the Formulas for:
* Density: (I think it's - D = M/V?)
* Mass: ?
* Volume?
(CHEMISTRY FORMULAS ONLY!!)
Explanation:
mass = desity × volume
volume = mass/density...
i believe thats right...
btw u means Physics formulae only..lol
According to dimensional analysis, which of the following is the correct set-up
for the problem "How many milligrams are there in 67 kiolgrams?"
1 mg
a) 67 kg x
1 g
10 kg
10 g
108
b) 67 kg x
1
mg
X
1 kg
10 g
10² mg
(102
c) 67 kg x
g
7
1 kg
1 mg
10-3 kg
1 mg
d) 67 kg x
х
10 kg
A a
Bb
C C
Answer:
67 kg = 67 kg × 1×10⁶ mg / 1 kg
67 kg = 6.7×10⁷ mg.
Explanation:
The following data were obtained from the question:
Mass in Kg = 67 kg
Mass in mg =.?
Thus, we can obtain the mass in milligrams (mg) as follow:
1 kg = 1×10⁶ mg
Therefore,
67 kg = 67 kg × 1×10⁶ mg / 1 kg
67 kg = 6.7×10⁷ mg
Therefore, 67 kg is equivalent to 6.7×10⁷ mg
What evidence do we have that energy levels in an atom are quantized? State and explain the evidence.
Answer:
The first evidence of quantization in atoms was the observation of spectral lines in light from the sun in the early 1800s by Joseph von Fraunhofer and William Hyde Wollaston.
Explanation:
(a) If only P-waves are recorded on the opposite side of the object, does the object have a solid or liquid interior?
Answer:
liquid
Explanation:
If there are no s-waves, the interior must be liquid, where s-waves cannot travel.
Which best explains why water boils in a pot sitting over fire?
Heat energy is created from the thermal energy in the air.
Heat energy is transferred from the water to the fire.
Thermal energy from the fire moves to the water in the form of heat.
Thermal energy from the surrounding air moves to the water.
Answer:
C
Explanation:
Thermal energy from the fire move to the water in the form of heat.
Answer:
correct option C
Explanation:
The heat required to raise the temperature of 12g of water from 16 C to 21 C is:
What is the molecular geometry of PBr3? A. trigonal pyramidal B. trigonal planar C. linear D....
The geometry of PBr₃ is trigonal pyramidal. Therefore, option A is correct.
Trigonal pyramidal geometry refers to the molecular geometry around a central atom in a molecule or ion where there are three bonded atoms and one lone pair of electrons. This geometry is commonly found in molecules with a central atom surrounded by three bonding pairs and one non-bonding pair of electrons.
The term "trigonal" refers to the arrangement of the three bonding pairs, which are positioned in a flat, triangular shape around the central atom. The term "pyramidal" indicates that the lone pair of electrons occupies the fourth position, giving the molecule a three-dimensional pyramid-like shape.
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Which object will have the most kinetic energy?
O Small object moving slowly
O Small object moving quickly
O Large object moving quickly
O Large object moving slowly
Answer:
the large object moving quickly because the more the mas the more kenetic energy
Is neon transparent translucent or opaque
Neon is transparent opaque as it is light, colorless and order less inert noble gas.
What are noble gas?Noble gas are defined as the element that belong to group 18 of the modern periodic table.
It is also known as inert gas or aerogene.
Noble gas are light, transparent, colorless and order less gases.
They are the group of six inert or non reactive gases.
Noble gases are odorless, colorless, nonflammable gases with negligible chemical reactivity.
Noble gases are exceedingly stable and unlikely to form chemical bonds due to their complete valence electron shells, which have no tendency to add or lose electrons.
Noble gas were originally classified as group 0 in the periodic table because it was thought they had a valence of zero, which means their atoms could not mix with those of other elements to form compounds.
Thus, Neon is transparent opaque as it is light, colorless and order less inert noble gas.
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Which system works with the reproductive system? (Hint, its not C)
A. Endocrine system
B. Excretory system
C. Respiratory system
D. Skeletal system
Answer:
A
Explanation:
Option B, Excretory System
How does increasing the mass affect the kinetic and potential energy of a pendulum?
Explanation:
Anytime matter is in motion it has kinetic energy. The faster an object moves, the more kinetic energy it has. The more mass an object has, the more kinetic energy it has.
Both the kinetic energy and potential energy are directly proportional to the mass of the object. Hence, increasing the mass will increase the kinetic and potential energy of the pendulum.
What is kinetic energy ?The kinetic energy of an object is generated by virtue of its motion. Whereas, the potential energy is generated by virtue of its position. hen the object is at rest, the energy is stored in it in the form of potential energy. When the object starts moving, its potential energy starts to converts to kinetic energy.
The kinetic energy of an object is related to its mass and velocity by the equation:
Ke = 1/2 mv²
Potential energy P = mgh
where, g is the acceleration due to gravity and h is the height of the object from the surface.
Hence, both potential energy and kinetic energy are directly proportional to the mass of the object. An increase in mass increase both form of energy of the object.
Therefore, the kinetic and potential energy of the pendulum increases with mass.
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3) The mass of a piece silver is 10.5 g. If a sample of pure silver has a volume of 13 cm3, what is the
density?
Answer:
The answer is 0.81 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of metal = 10.5 g
volume = 13 cm³
We have
[tex]density = \frac{10.5}{13} \\ = 0.8076923...[/tex]
We have the final answer as
0.81 g/cm³Hope this helps you
Answer:
0.807
Explanation:
mass/volume = density
10.5/13 = 0.807
help me i will chose brainiest
Answer:
Atomic # is 9
protons 9
neutrons: 10
electrons: 9
mass :18.n u
energy shells: 18