Answer:
5 valence electrons
Explanation:
Can yall help me, I'm sooo confused
Answer:2. C Hydrochloric acid
Explanation:
Answer:
the answer to #2 ic C. hydrochloric acid.
Explanation:
7. Who was the first explorer from France to reach North America? A. Giovanni da Verrazano C. Louis Joliet B. Jacques Cartier D. Samuel de Champlain
Your lab group is working on an investigation that involves using a chemical one of your lab partners accidentally spills the Chemical and the glass container holding the chemical breaks what safety steps should you follow next.
Answer:
Use appropriate cut-resistant gloves to handle broken glass. Use forceps, tongs, scoops, or other mechanical devices for removing or retrieving broken glass from the work area or a fume hood. A dustpan and brush should be used to clean up shards/small pieces of broken glass, Pasteur pipettes, or shards of glass.
Explanation:
Answer:
Step away from the mess and have a teacher/gaurdian access the situation.
What is the ph value of human saliva
The ph value of human saliva is between 6.2-7.6 with 6.7 being the average pH
ph value of human saliva is 7 and 6
where is ultraviolet waves located on the electromagnetic spectrum in relation to other kinds of radiation
Isotopes,ions,and atoms worksheet 2 answer key
Explanation:
Isotopes are defined as atoms of the same element but differ in the number of neutrons in their nucleus where a number of protons and electrons remain the same.Ions are defined as chemical species of an atom with an electrical charge.IO with a positive charge are called cations, and ions with a negative charge are called anions.Atom has three subatomic particles: protons, electrons, neutronsAtomic number (Z)= Number of protonsNumber proton = Number of electrons (isoelectric neutral atom)Atomic mass (A)= Number of protons + Number of neutronsThe chemical symbol of an element X is written as:[tex]^A_ZX^C[/tex]
Where : Charge on ion = C
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How do hydroelectric dams emit greenhouse gases like methane without burning any fossil fuels?
Answer: The concept behind hydroelectric power is simple: Rather than combusting fossil fuels, like coal, oil, or natural gas, which put over 52 million kilotons of greenhouse gases into the atmosphere each year, dams block the water flowing in rivers or lakes and use the force of the would-be flow to turn turbines,
Explanation:
How many electrons are in O2-?
Answer:
There will be 16 electrons in O2-
How many atoms are there in 4 moles of Na?
Answer:
24.088 * 10^23 atoms
Explanation:
The number of atoms in 4 moles of any atom is a constant since 1 mole has 6.022 * 10^23 atoms which is not affected by any property of any atom
So, 4 moles of Na will have 4 * 6.022 * 10*23 atoms
24.088 *10^23 atoms are present in 4 moles of any element
Please help also could u put explanation
Answer:
11.6 N/KgExplanation:
[tex]a = \frac{force}{mass} = \frac{3750}{150} = 11.66 [/tex]
The unit of the answer is N/Kgwhat charge does krypton (KR) form
Answer:
1- charge
Explanation:
A gas mixture at 0°C and 1.0atm contains 0.010mol of H2, 0.015mol of O2, and 0.025mol of N2. Assuming ideal behavior, what is the partial pressure of hydrogen gas (H2) in the mixture?
A. About 0.010atm, because there is 0.010mol of H2 in the sample.
B. About 0.050atm, because there is 0.050mol of gases at 0°C and 1.0atm.
C. About 0.20atm, because H2 comprises 20% of the total number of moles of gas.
D. About 0.40atm, because the mole ratio of H2:O2:N2 is 0.4:0.6:1.
Answer:
PH₂ = 0.2 atm
C) About 0.20atm, because H2 comprises 20% of the total number of moles of gas.
Explanation:
To determine the partial pressure of hydrogen gas (H2) in the mixture,
Partial pressure H₂ = Ptotal * xH₂
xH₂ = Mole fraction of H₂ = ∩H₂ / ( ∩H₂ + ∩O₂ + ∩N₂)
xH₂ = 0.01 / (0.01 + 0.015 + 0.025)
xH₂ = 0.01/0.05
xH₂ = 0.2
therefore
PH₂ = pT * xH₂
PH₂ = 1.0 atm * 0.2
PH₂ = 0.2 atm
so the correct option is C) About 0.20atm, because H2 comprises 20% of the total number of moles of gas.
The correct answer to the question is Option C. About 0.20 atm, because H₂ comprises 20% of the total number of moles of gas.
We'll begin by calculating the mole fraction of Hydrogen (H₂) in the mixture.
Mole of Hydrogen (H₂) = 0.01 mole
Mole of Oxygen (O₂) = 0.015 mole
Mole of Nitrogen (N₂) = 0.025 mole
Total mole = 0.01 + 0.015 + 0.025 = 0.05 mole
Mole fraction of Hydrogen (H₂) =?Mole fraction = mole of gas / total mole
Mole fraction of Hydrogen (H₂) = 0.01 / 0.05
Mole fraction of Hydrogen (H₂) = 0.2NOTE: The mole fraction of Hydrogen, H₂ (i.e 0.2) in the mixture is exactly 20%.
Finally, we shall determine the partial pressure of Hydrogen, H₂. This can be obtained as follow:
Mole fraction of Hydrogen (H₂) = 0.2
Total pressure = 1 atm
Partial pressure of Hydrogen (H₂) =?Partial pressure = mole fraction × total pressure
Partial pressure of Hydrogen (H₂) = 0.2 × 1
Partial pressure of Hydrogen (H₂) = 0.2 atmFrom the calculations made above, we can see that the correct answer to the question is:
Option C. About 0.20 atm, because H₂ comprises 20% of the total number of moles of gas.
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Jamal is working with three ionic compounds: sodium chloride, calcium sulfide, and barium oxide. His teacher asks him which are the positive ions in each compound. What should Jamal’s answer be? sodium, calcium, and barium barium, sulfur, and oxygen calcium, barium, and chlorine chlorine, sulfur, and oxygen
Answer:
option A is correct ( sodium, calcium and barium)
Explanation:
Given compounds:
Sodium chloride , calcium sulfide, barium oxide
We know that metals form positive ions. In order to solve the problem we must identify the metals from given compounds.
Na⁺Cl⁻
Ca²⁺S²⁻
Ba²⁺O²⁻
We can see that sodium, calcium and barium contain positive charges.
Thus option A is correct.
Because sodium have one valance electron. When it combine with chlorine sodium lose its one electron to complete the octet and chlorine accept it to complete its octet. Thus sodium form positive ion and chlorine form negative ion.
Similarly barium and calcium are present in group 2. Both have two valance electron. When they lose them cation are formed.
Other option are incorrect because,
Option B have sulfur and oxygen which are anion.
Option C have chlorine which is also anion
Option D have chlorine, sulfur and oxygen that are anions.
Answer:
option A is correct ( sodium, calcium and barium)
Explanation:
What is the total number of atoms in the formula (NH4)3PO4?
-If the pH of the blood is lower than normal, explain how the kidneys attempt to raise
the pH of the blood.
Prisms separate ________ light, such as that from the Sun, by wavelength. Which best completes the statement? ultraviolet white infrared black
Answer:b
Explanation: took the test
Prism separate white light, such as that from the Sun according to their wavelength.
What is prism?Prism is an optical object which have three flat polished surfaces and a triangular shape, from which refraction of light takes place.
When the sunlight or any vissible light falls on the surface of prism then the refraction of light takes place and due to refraction bending of light at different angles according to their wavelength takes place. As we know that vissible light consist all colors, so the separation of white light into the colors takes place through prism.
Hence white light gets separated through prism.
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CAN SOMEONE PLEASE HELP ME WITH MY CHEMISTRY ASSIGNMENT.
Answer:
yes its correct
Explanation:
. There are two elements named after the US state that they were discovered in. Who are they?
Answer:
Californium and Berkelium
Explanation:
Both are in California.
These elements are 98 and 97 on the Periodic Table of Elements, respectively.
28.6 hectoliter = centiliter
What is the density of this problem
Answer:
Density of copper = 8.9 g/cm³
The density of liquid mercury is 13.6 g/cm³ which means mercury is denser than copper so copper will float on liquid mercury.
Explanation:
Given data:
weight of copper metal = 1896 g
Dimensions of block = 8.4 cm, 5.5 cm, 4.6 cm
Density of copper = ?
Will it float to the liquid mercury = ?
Solution:
Density:
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
Formula:
D=m/v
D= density
m=mass
V=volume
volume of coper metal = 8.4 cm × 5.5 cm × 4.6 cm
volume of coper metal =212.52 cm³
d = 1896 g/ 212.52 cm³
d = 8.9 g/cm³
The density of liquid mercury is 13.6 g/cm³ which means mercury is denser than copper so copper will float on liquid mercury.
Which order shows the levels of organization from largest to smallest?
o organism, organ system, cell, organ, tissue
organism, tissue, organ system, organ, cell
o organism, organ, organ system, cell, tissue
organism, organ system, organ, tissue, cell
Explanation:
From the question , arranging the organization levels from largest to smallest we have
Organism , organ system , organ , tissue , cell .Hope this helps you
Answer:
Organism , organ system , organ , tissue , cell
Explanation:
I took the test but it was backwards hope that helps!
hydrogen come from the Latin word which is hydro and genes can you tell me the meaning of hydro and genes. Help please
Combining "hydro" and "genes" in the context of the Latin roots, we can interpret it as "water origin" or "water-related origin."
The term "hydro" in Latin means "water." It is derived from the Greek word "hydor," which also signifies water. "Hydro" is commonly used as a prefix in scientific terms related to water or hydrogen. In the context of chemistry, "hydro" often denotes a compound or process involving water or hydrogen atoms. For example, hydrocarbon refers to organic compounds composed solely of hydrogen and carbon atoms.
On the other hand, "genes" in Latin is derived from the Greek word "genos," which translates to "origin" or "birth." In biology, the term "genes" refers to the segments of DNA that contain instructions for the development and functioning of living organisms. Genes determine various traits, such as physical characteristics, behavior, and susceptibility to certain diseases. They play a fundamental role in the transmission of hereditary information from one generation to another.
This interpretation aligns with the understanding that hydrogen, which is essential for life and abundant in water, plays a vital role in various biological and chemical processes.
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Which combination of solid plus liquid indicates a chemical change has taken place?
es =))
A)
solid + liquid A
B)
solid + liquid B
C)
solid + liquid
D)
solid + liquid D
Answer:
It's D
Explanation:
Trust
How are mass and volumes alike?
What is the mass of the ethyl alcohol that exactly fills a
20.0 mL container? The density of ethyl alcohol is 1.79
g/mL.
Answer:
35.8 grams
Explanation:
Multiply the density of ethyl alcohol by the volume because this will cause the units of mL to cancel out leaving you with the grams, or mass.
1.79 x 20 = 35.8
Compare and contrast all the periodic trends as you move down a group of metais. Organize
your response into a heading for each trend
Answer:
The number of energy levels increases as you move down a group as the number of electrons increases. Each subsequent energy level is further from the nucleus than the last. Therefore, the atomic radius increases as the group and energy levels increase.
Explanation:
Dose this help? Tell me if it dose.
Answer:
The modern periodic table has a lot to say about the chemical elements, besides the atomic number, atomic weight, and symbol of the identified elements. For example, chemical elements falling in the same group share common properties, which are different from other groups. Also, go through the periodic table trends and you will come to know a regular pattern in the alteration of physical and chemical properties of elements, as you go from left to right, from top to down direction, and vice versa.
Explanation:
I hope this gives an idea to your question - Good luck ^w
Name each compound....
Answer:
1. chlorine ion 2. methylene
Explanation:
I think #2 is right. i'm not sure.
why is the technology of desalination a useful one?
Answer:
They give water to the agricultural industry.
They consume a large amount of energy.
They aid with habitat protection.
The environmental impact can be high.
They distribute accessible drinking water.
If an atom of element A has a mass of 2 units, while an atom of element B has a mass of 5 units, what would be the ratio of element A to element B in a compound that had a mass of 11 units?
An atom of element A has a mass of 2 units, while an atom of element B has a mass of 5 units, the ratio of element A to element B in a compound that had a mass of 11 units is 3:1
What are atom?Atom are defined as smallest unit into which matter can be divided without the release of electrically charged particles.
It can also be defined as the building blocks of matter and were created after big bang theory.
Mass are defined as quantitative measure of inertia, fundamental property of all matter.
Elements are defined as a pure substance consisting of only one type of atom which all has the same numbers of protons in their nuclei.
As ratio of element A to element B is given then the ratio will be 3:1
Thus, an atom of element A has a mass of 2 units, while an atom of element B has a mass of 5 units, the ratio of element A to element B in a compound that had a mass of 11 units is 3:1
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An important rule for students to know when heating a test tube is to
A) place a cork in the mouth of the test tube.
B) point the mouth of the test tube away from others.
C) hold the test tube loosely with the fingertips.
D) shake the test tube forcefully to keep contents mixed.
Answer:
B .point the test tube away from others
Explanation:
Well in science your supposed to keep it away from you and others so the aroma doesnt harm your nose or anyone eles´s nose
Hoped I helped -\
Sleepy~
