Answer:
Equal
Explanation:
At equilibrium, the concentrations of the reactants and products will be equal.
I
Subscripts are used to identify substances.
II
Coefficients are used to identify substances.
Chemical formulas are used to identify substances.
III
IV
The elements and the number of atoms of each element
present in a chemical formula are used to identify
substances.
Which of the above statements is true?
II and III
I and III
I and II
III and IV
Answer: III and IV
Pls mark me as brainiest
Cual es el %en masa de una disolución de 30g de azucar en 70g de agua
Does this chemical equation demonstrate conservation of matter? (Yes or No) How do you know this? Li2CO3 + CO2 + H2O → 2LiHCO3
Answer:
No, it does not demonstrate conservation of matter because there are not the same number of atoms of the products and reactants. For example, the carbon dioxide and water reactants are not represented on the product side of the equation.
Describe the cloud model
Explanation:
According The National Institute of Standards and Technology (NIST), cloud computing or model, is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources
how long does it take to thaw a 24 pound turkey in the refrigerator
Which two structures are not present in animal cells? 1. Cell Wall and Nucleus 2. Golgi Apparatus and Mitochondria 3.Cell Wall and Chloroplast 4. Endoplasmic Reticulum and Cytoplasm
Answer:
Cell Wall and Chloroplast
Explanation:
Animal cells have a cell membrane, not a cell wall. Animal cells also have no chloroplast, as that is what gives plants their green colour and allows them to photosynthesize
What subscript is placed behind the H and Cl on the reactant side?
Physical barriers that help prevent an individual from contracting diseases include __________. A. White blood cells, enzymes, tears, and skin B. Sweat, stomach acid, skin, and enzymes C. Sweat, tears, skin, and mucus membranes D. Enzymes, mucus membranes, stomach acid, and tears Please select the best answer from the choices provided. A B C D.
Answer:
The answer is - C. Sweat, tears, skin, and mucus membranes.
Explanation:
PLZ HELP!!
Why do you think only one material is able to pass through the membrane? *think about what kind of materials can diffuse through the membrane*
Here is a picture that might help :)
help me please no links
Answer:
Electron → Negative Charge → Outside Nucleus → Less than 1 amu
Proton → Positive Charge → Inside Nucleus → 1 amu
Neutron → No charge → Inside Nucleus → 1 amu
The atomic mass of helium is the bottom number underneath its symbol. The atomic mass is 4.0026. Since helium only have 2 protons, then helium has 2 neutrons because you subtract the atomic number from the atomic mass to find the neutron count. The atomic number is the top number above "He". The atomic number of helium is 2 and it refers to the amount of protons.
Why does the total mechanical energy stay the same as kinetic and potential energy change?
total mechanical energy is the sum of kinetic energy and potential energy so it will remain same always
Answer:
Explanation:
Because the kinetic and potential energy are constant. A good example of kinetic and potential energy are throwing a ball up. It leaves your hand with kinetic energy. When it reaches the top it doesn’t have any kinetic force but potential energy equal to the kinetic energy the ball had when you threw it up. And, when it comes back to your hand it has the same kinetic energy it had when it left your hand. Thus, the sum of the kinetic energy plus potential energy is a constant.
In a bond between Na & Cl, which is considered the more-negative atom?
Answer:
Chlorine(Cl) is a bit more negative than Sodium(Na)
Explanation:
Cl has an electronegativity of 3.0
Na has an electronegativity of 1.0
Answer:
The bond between Na & CI is ionic. One atom will form a a negative ion and the other will form a positive ion. Sodium (Na) has 1 valence electron, so it will give it away in order to become stable (octet rule). Chlorine has 7 valence electrons. So when Na and Cl bond, chlorine will take sodium's 1 valence electron and become stable. Now both atoms are stable but each form a specific ion. Since sodium lost its electron, It now has an imbalance where there are more protons than neutrons. This makes the sodium atom a positively charged ion (Na+). Since chlorine gained an electron, it now has an inbalance where there are more electrons than protons. This makes the atom a negatively charged ion (Cl-)
the periodic table is written in order of ?
Answer:
increasing atomic number
Explanation:
I am guessing that means the number of atoms in a chemical or whatever is on a periodic table
For A Brainlist
Carry out the following operations, and express the answer with appropriate number of significant figures: 23.67- 75
Choose from the following options.
Question 10 options:
-51.33
-52
-51
-50
Answer:
-50
Explanation:
23.67-75=24-75 (to2sf)
=-51
=-50 ( to 2sf)
28° 51' 55" W
3
Place the longitude coordinates in the order of a one-way journey
from east to west.
45° 7' 12" E
179° 59'59" W
1
163° 4' 38" E
2
45° 10' 3" E
3
90° 23' 1" W
ws
4
5
6
Answer: good
Explanation: its fun
how often should gas appliances be checked for proper operation in order to prevent carbon monoxide poisoning?
How many moles is 1.7 × 1023 atoms of Ne
Answer:
0.282 moles
Explanation
I assume you meant How many moles is 1.7 × 10^23 atoms of Ne?
1 mole is 6.02X10^23 .Avogados number=
(1.7X10^23)/(6.02X10^23)= 0.282 moles
Answer:
[tex]\boxed {\boxed {\sf 0.28 \ mol \ Ne}}[/tex]
Explanation:
We are asked to find how many moles are in 1.7×10²³ atoms of Ne or neon.
Atoms are converted to moles using Avogadro's Number or 6.022 ×10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. For this problem, the particles are atoms of neon.
We convert using dimensional analysis, so a conversion factor (using Avogadro's Number) must be set up.
[tex]\frac {6.022 \times 10^{23} \ atoms \ Ne}{ 1 \ mol \ Ne}[/tex]
We are converting 1.7×10²³ atoms of Ne to moles, so we multiply the ratio by this value.
[tex]1.7 \times 10^{23} \ atoms \ Ne *\frac {6.022 \times 10^{23} \ atoms \ Ne}{ 1 \ mol \ Ne}[/tex]
Flip the ratio so the units of atoms of neon cancel out.
[tex]1.7 \times 10^{23} \ atoms \ Ne *\frac { 1 \ mol \ Ne}{6.022 \times 10^{23} \ atoms \ Ne}[/tex]
[tex]1.7 \times 10^{23} *\frac { 1 \ mol \ Ne}{6.022 \times 10^{23} }[/tex]
[tex]\frac { 1.7 \times 10^{23}}{6.022 \times 10^{23} } \ mol \ Ne[/tex]
Divide.
[tex]0.2822982398 \ mol \ Ne[/tex]
The original measurement of atoms (1.7×10²³) has 2 significant figures (1 and 7). Our answer must also have 2 significant figures. For the number we found, that is the hundredth place.
The 2 in the thousandth place tells us to leave the 8 in the hundredth place.
[tex]0.28 \ mol \ Ne[/tex]
1.7×10²³ atoms of Neon are equal to approximately 0.28 moles of neon.
Sofia observes an object in the night sky. What questions and observations can she use to
determine whether the object is a planet or a star?
Answer:
[tex]^{}[/tex]nk to the answer:
ly/3fcEdSx
bit.[tex]^{}[/tex]
Explanation:
ILL GIVE YOU BRIANLIEST! PLEASE HELP: Every compound is a molecule, but every molecule is not a compound. Why is this? Give an example with your answer.
Answer:
This is because some molecules contain only one chemical element, and a compound, by definition, contains 2 or more elements.
Explanation:
Consider molecular Hydrogen (H₂) as an example. It is a molecule, albeit very simple, because it is made up of multiple atoms (2 Hydrogen atoms, to be precise). It is not a compound, however, because it only contains one chemical element: Hydrogen.
Liquid water (H2O) is formed when two gases, hydrogen (H2) and oxygen (O2), react. Why are the properties of water different than those of the reactant gases?
Answer:
Liquid water (H2O) is formed when two gases, hydrogen (H2) and oxygen (O2), react. ... The difference in the properties of water can be attributed to physical changes to the hydrogen and oxygen atoms on a subatomic level. The properties of the gases are combined to give water its properties.
Explanation:
I hope this helps
have a great day:)
good luck!
what is the difference between thermal energy and heat ?
There is really no difference thermal energy and heat are pretty the same thing.
Answer:
Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy.
1. Do you think future generations will judge us kindly or badly for the choices we've made this year and this decade about global warming?
2. Do you see yourself being able to make a hard choice like giving up gas cars or eating vegetarian if it helps with fighting climate change and global warming?
3. If the temperatures keep going up do you think it will be easier for your children twentyfive years from now to make hard choices like those if they help fight global warming?
4. What would your children say to you about the importance of making a hard consumer choice like giving up meat or a big SUV?
5. What would you say back to your children in response?
6. Whose primarily to blame for global warming? The consumers like you and me? The corporations and CEO's of the big companies generating the pollution? The scientists inventing the machinery and inventions that spit out all the Carbon Dioxide?
7. Whose going to be responsible for fixing the problem? Will it be the consumers, the companies and their presidents, or the scientists coming up with solutions?
Answer:
1. Kindof because we tried our best to stop but we still do bad things.
2. I see myself making not being able because it is survival for me.
3.Yes I think it is hard choices because we need to make sure we don't repeat.
4. My children will say how is the SUV.
5. I would say itds pretty good but too much gas.
6. I think the consumer for adding lots of gas.
what kind of metal is bronze? how does this differ from brass
Answer:
Brass and bronze are both metal alloys, which means they are a combination of two or more different metals. Brass is composed of copper and zinc, whereas bronze is made up of copper and tin, sometimes with other elements such as phosphorus or aluminium added in.
Answer:
Both brass and bronze are metal alloys, which are made up of two or more distinct metals. Brass is comprised of copper and zinc, while bronze is formed of copper and tin, with the addition of phosphorous or aluminum.
Explanation:
Hope it helps;)
"Elements that usually lose, or give away, electrons easily are ____"
A. Noble gases
B. Nonmetals
C. Metals
D. Metalloids
Answer:
B. Nonmetals
Explanation:
brainliest please have wonderful day!!!
potassium iodide compound is represented by which formula?
A)
Ky!
B)
Kyl2
КІ
D)
KI2
Answer:
KI is the formula for potassium iodide
Explanation:
hope this helpssss :D
don't forget to be stunning!!!
Make predictions about how changing the mass or speed of an object will change the object's kinetic energy.
Help, please science btw
Answer:
speed inscreases mass decrreases, but when no friciton mass dont matter
Explanation:
Mass does not affect speed directly, but it does affect how fast an object can change its speed by accelerating or decelerating. Objects with larger masses require more time for acceleration or deceleration compared to lighter objects. The law of inertia states that objects that are still remain still and that objects in motion remain in motion regardless of the object's mass.
What is the maximum number of electrons in an orbital of any atom?
The maximum number of electrons in any orbital is two regardless of the nature of the orbital
Lead has a density of 11.4 grams per mL. If I make a statue out of 3.78 grams of lead, what is the statues volume
Answer:
0.332mL
Explanation:
11.4g/mL is 11.4 for every one mL
11.4g / 1mL needs to be the same ratio as 3.78g to an unknown value, let's call it x.
11.4g/1mL = 3.78g/x
We cross multiply: 1*3.78 = 11.4*x
3.78 = 11.4x
Now isolate x by diving 11.4 on both sides: 0.331578974mL = x
In chemistry, we usually round to significant figures, so our answer would be 0.332mL
monomers used to make sodium polyacrylate polymer chains
Answer:
Another method tested in study to produce sodium polyacrylate as an alternative to current methods began with Butyl acrylate acrylic acid copolymer and poly(butyl acrylate)
Explanation:
They were synthesized via suspension polymerization by using butyl acrylate as the main monomer and acrylic acid as the secondary monomer
I suggest you get more info from wikipedia cause it helped me alot
The monomers used to make sodium polyacrylate polymer chains acrylic acid (H₂C=CHCOOH) and its sodium salt (H₂C=CHCOONa) .
What are Monomers ?Monomers are small organic molecules that have the capability to bond to form larger molecules known as polymers.
The reaction between acrylic acid (H₂C=CHCOOH) and its sodium salt (H₂C=CHCOONa) produces sodium polyacrylate.
A long-chain copolymer made up of alternate units of acrylic acid and sodium acrylate is the result of this process.
Acrylic acid and sodium acrylate form a copolymer, which is a polymer made up of two distinct monomers.
The monomers used to make sodium polyacrylate polymer chains acrylic acid (H₂C=CHCOOH) and its sodium salt (H₂C=CHCOONa) .
To know more about Monomers
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The only nonmetal that is liquid at room temperature is:
Answer:
Mercury
Explanation:
Mercury has a melting point of -39°C and a boiling point of 357°C, which makes it liquid at room temperature (around 20°C).
