Please help! This one is easy, I just forgot! Multiple choice!
To decrease the rate of reaction you would ... *
1. increase the temperature
2. add a catalyst
3. increase the pressure
4. decrease the concentration of a reactant
ASAP!!!!!!!!
How can you tell that a precipitate has formed?
Answer:
if a solid appears when mixing two liquids
Explanation:
i remember this question :D
Help fill in the blanks this is for 8th-grade science btw.
Answer:
i know that 10 x is .22300
Please help me I will give you the brain thing and extra points.
image below #6
Answer:
the anse wold be A
What stage of its life cycle is the Sun in? What will it likely form when it runs out of fuel? (PLEASE DON’T GET AN ANSWER FROM ANY WEBSITE)
Answer: the main sequence
Explanation: it’s experiencing its main stage of life
How does Gregor Mendel's work with pea plants affect human life today? OA A. People continue to cross pea plants to fix Mendel's many experimental mistakes. B. People use Mendel's knowledge of DNA and chromosomes to create new species. C. People use the strains of pea plants that Mendel developed as a major food source. D. People continue to selectively breed plants and animals to produce predictable results.
Answer:
write the unit of area and density in SI System
1. define what an ion is (make sure electrons are part of the definition)
2. explain (in terms of electrons) how the sodium is becoming a positive ion
3. explain (in terms of electrons) how the chlorine is becoming an a negative ion
4. Explain why the difference in charges causes them to become attracted and bond to make NaCl, also known as table salt.
Answer:
valence shell, has eight electrons in it, so the atom becomes positively charged. ... in energies and is useful in explaining why atoms form the ions that they do. ... which we write as Na 2O. The need for the number of electrons lost
Explanation:
1. An ion of an atom is one in which the number of protons and electrons is not the same. If there are more protons than electrons, an atomic ion has a positive charge and is called a cation. If there are more electrons than protons, the ion has a negative charge and is called an anion.
2. Such bonds are created when the outermost electrons of one atom (such as sodium) are transferred permanently to another atom (such as chlorine). The atom that has lost an electron becomes a positively charged ion (called a cation), while the atom that picks up the extra electron becomes a negatively charged ion (called an anion).
3. For a chlorine atom to become a chloride ion, it must gain an electron. The chloride ion has a negative charge and is written as Cl-. Chlorine gains an electron because it has seven valence electrons, and to be a full octet, it gains an electron. A chloride ion is called an anion. Its electron configuration is 1s2 2s2 2p6 3s2 3p6.
4.Ionic bonds are also formed when there is a large electronegativity difference between two atoms. This difference causes an unequal sharing of electrons such that one atom completely loses one or more electrons and the other atom gains one or more electrons, such as in the creation of an ionic bond between a metal atom (sodium) and a nonmetal
hope this helps
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What are the outermost electrons of an atom
Answer:Valence Shell
Explanation: The Valence Shell is the outermost orbital of an atom. The Valence Shell electrons are used in making chemical bonds and are the reason the atom has its physical and chemical properties.
If Bert the Bat travels eastward at 540 mph with a tail wind of 6 mph. What is his actual speed?
Answer:
12 mph
Explanation:
Does the Red Sea have high or low viscosity?
HELP FAST ITS MULTIPLE CHOICE WILL MARK BRAINLIEST!!
Shells can also be called (choose all that apply)...
Question 4 options:
circles
energy levels
rings
spheres
Answer: I believe its the last one SPHERES.
Explanation:
Nitrogen gas (N2) and hydrogen gas (H2) react to produce ammonia (NH3) according to this balanced equation. N2 (8) + 3 H2(g) → 2 NH3 (8) How many liters of H2, measured at standard temperature and pressure, are required to react completely with 11.2 L of N2? A. 16.8L B. 22.4L OC. 33.6L D. 44.8 L
Answer:
Explanation:
Answer:
Explanation: