please someone help me its due today thanks :D

Answer:

A one-point pH change indicates the strength of the acid or base has increased or decreased tenfold; a 2-point change indicates a 100-fold change in acidity or alkalinity, and a 3-point change in pH indicates a 1000-fold change. Examples: • An increase in pH from 7.0 to 8.0 means the water is 10 times more basic.

Explanation:

Answer:

mushroom

Explanation:

Answer:

Explanation:

a. H3O+

b.  H3O+

c. CH3C(OH2)+

Answer:

a medium!!!!

Explanation:

ITS CORRECT!!!! I GOT IT RIGHT ON MY TESTTTTT! I PROMISEEE

Answer:

1 sulfide

2 Fluoride

3 A

5 A

6 2

Answer:

7. Chemical

8. Chemical

9. Physical

10. Physical

11. Physical

12. Physical

Explanation:

The name given to the pairs of valence electrons that do not participate in bonding in diatomic oxygen molecule is called Unshared pair

Unshared pair of electrons are also called Free radicals, lone pair or non bonding pairs, they refer to electrons that do not take part in covalent bonding of molecules.

Unshared pair together with shared pair occupy the  valence electron shell and make up the valence electrons.

Diatomic oxygen molecule has 4 pair of unshared electrons

See more here: https://brainly.com/question/15451932

Answer:

CLEANER

Explanation:

Independent variable is the variable in an experiment that is changed or manipulated by the experimenter in order to bring about a measurable response.

In this question, Marie notices that the current cleaner she is using on her shower is not cutting through the hard water build-up that has accumulated. She decides to purchase 3 other cleaners to see if one of them will do a better job of cutting through the stains. The CLEANERS being changed in this experiment is the INDEPENDENT VARIABLE.

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\ [/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{3.612 \times {10}^{24} }{6.02 \times {10}^{23} } \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

C

Explanation:

Calcium is an element with a total of 20 electrons.

 It has 4 shells with a configuration of:

          2, 8, 8, 2

Option C is the most similar to calcium but the number of shells is not complete.

It still requires two more shells with 8 and two electrons respectively.

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Transformations :

1. CaO + H₂O⇒Ca(OH)₂

2. CaO + CO₂⇒CaCO₃

3. Ca(OH)₂+ 2HCl⇒CaCl₂+2H₂O

4. Ca(OH)₂+H₂CO₃⇒CaCO₃+2H₂O

5. CaCO₃⇒CaO+CO₂

Answer:

The word gentle traces back to the Latin word gentlis, meaning “of the same clan,” and at first the world was used to describe people belonging to distinguished families, who were seen as courteous and noble. Nowadays you’re more likely to hear the word used to refer to things that are calm, moderate, and without harshness. The word is often applied to people, but it can be used more broadly to describe anything that is mild, such as "a gentle detergent" or "a gentle reminder."

Answer:

0.8162 gramos de plomo por gramo de yodo

1.633 gramos de plomo por gramo de yodo

Explanation:

Asumiendo una base de 100 gramos para cada compuesto:

Primer compuesto:

Gramos plomo: 44.94g

Gramos de yodo: 100-44.94g = 55.06g

Así, la masa de plomo por gramos de yodo para el primer compuesto es:

44.94g plomo / 55.06g Yodo =

0.8162 gramos de plomo por gramo de yodo

Segundo compuesto:

Gramos plomo: 62.02g

Gramos de yodo: 100-62.02g = 37.98g

La masa de plomo por gramos de yodo para el segundo compuesto es:

62.02g plomo / 37.98g Yodo =

1.633 gramos de plomo por gramo de yodo

Answer:

magnesium

Explanation:

it is the only metal in the choices. everything else is on the right side of the old line that separates metals and nonmetals on the PPT. nonmetals aren't, shiny or good conductors or malleable or ductile.  only metals can have those qualities. the only metal is magnesium

Electronegativity across a period: increases.

Electronegativity down a group: decreases.

Explanation:

Just did on Edge 2021

Electronegativity across a period increases and Electronegativity down a group decreases.

Electronegativity, symbolized as χ, is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond.

An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus.

On the periodic table, electronegativity generally increases as we move from left to right across a period and decreases as you move down a group.

As a result, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.

Hence, Electronegativity across a period increases and Electronegativity down a group decreases.

Learn more about Electronegativity here :

https://brainly.com/question/17762711

#SPJ2

Answer:

Answer. Answer: The circulatory system is a network consisting of blood, blood vessels, and the heart. This network supplies tissues in the body with oxygen and other nutrients, transports hormones, and removes unnecessary waste products.

Explanation:

Answer:

ME AND YOU HAVE THE SAMEEEE USER BUT LOOK

The circulatory system is a network consisting of blood, blood vessels, and the heart. This network supplies tissues in the body with oxygen and other nutrients, transports hormones, and removes unnecessary waste products.

Explanation:

Explanation:

electrons move arround nucleus in the orbit such as sun in suria system..

Answer:

the answer is B proteins

Explanation:

brainliest pls

Answer:

B. protein

Explanation:

A polymer is defined as a molecule which has 'n' number of monomer units.

Similarly proteins are also polymers as they are made up of amino acids and contain a number of repeated units just like polymers.

Answer:

a because where the air travels for example a radiator

Answer:

C.

In areas with the same altitude

Explanation:

Answer:

A. when dissolved in water

Explanation:

Water is an extremely polar molecule, meaning it has a positive end a negative end. When an ionic compound is dissolved, the positive pole of water will be attracted to the negative ion and attach itself to it. The same goes for the positive ions. That's how water breaks down ionic compounds

Answer:

ions do separate in an ionic compound because there is the free flow of electrons in the oppositely charged ions and conducts electricity in an aqueous form

Answer:

58.5g/mol

Explanation:

Given substance:

 Sodium chloride  = NaCl

Unknown:

Molecular mass = ?

Solution:

The molecular mass of a compound is the gram-formula mass or gram-molecular weight of the compound.

It is determined by adding its component atomic masses and then express in grams per mole;

Atomic mass of Na = 23g

Atomic mass of Cl = 35.5g

 NaCl  = 23 + 35.5  = 58.5g/mol

Answer:

Vaporization and Sublimation

Explanation:

Answer:

Well there's solid states, liquid states, and gas states in matter.

Answer:

a zinc is the most reactive

Answer:

A bar graph shows the relationship between different values of data. Each data value is represented by a column in the graph.

Answer:

down below

Explanation:

MgCl2

AlF3

LiBr

K2S

Answer:what are u asking to do?

Explanation: