Can someone check if I did this right pls

Answer:it’s a

Explanation:cause

Answer:

The substances more alkaline than water are;

1) Spit, 2) Blood, 3) Hand Soap, and 4) Drain Cleaner

Explanation:

The diagram in the simulation displays a list of liquid substances, arranged from bottom to top in the order of increasing alkalinity.

The ph of water is 7.0

The ph of spit (saliva) is between 6.2 and 7.6

The ph of blood is about 7.4

The ph of hand soap is between 9 and 10

The ph of drain cleaner is between 12 and 14.

The atomic mass of an atom is calculated by adding up protons and neutrons

There are two components that accompany an element, the mass number and atomic number

Atoms are composed of 3 types of basic particles (subatomic particles): protons, electrons, and neutrons

The charge of 1 proton is equal to a charge of 1 electron but has a different sign

The proton is positively charged (+1), the electron is negatively charged (-1). and neutrons not charged (neutral)

The Atomic Number (Z) indicates the number of protons and electrons in an atom of an element.

Atomic number = number of protons = number of electrons ⇒ neutral number

Atomic mass is the sum of protons and neutrons

Atomic Number (Z) = Atomic mass (A) - Number of Neutrons

Answer:

A; 0.5

Explanation:

To find the density, you have to do the Mass divided by the Volume; in this case, it's 8.0/4.0.

8/4 = 0.5

Answer:

The corect answer is F g~m/d^2

Explanation:

Answer:

F g~m/d^2

Explanation:

Answer:NO

Explanation:NO

Answer:

[tex]10.72 \times 10 {}^{3} m = 10.72km \\ 8.09 \times 10 {}^{ - 6} g = 8.09 \times 10 {}^{ - 9} kg \\ \\ note : \\ to \: convert \: to \: \: k(units) \: you \: divide \: the \: value \: by \: {10}^{3} . \\ 5m \: to \: km \: will \: be : \\ \frac{5}{1000} km = {5 \times 10}^{ - 3} km[/tex]

Answer:4,800

Explanation:

5 winks a minute, 60 minutes in an hour.

300 winks an hour, 16 hours a day.

4,800.

Answer:

The answer is 4,800 winks per day.

Explanation: There are 24 hours in a day, 24 minus the 8 hours shes asleep is 16. There are 60 minutes in an hour. 5 x 60 is 300. 300 winks an hour multiplied by the 16 hours she's awake is 4,800.

Answer: solids are tense but spread out. Gas is spread out completely and liquid is all together

Explanation:

B:Fluid Flow because fluid flow is how convection heat is transfered

Answer:

It depends on which element you are talking about. I appears that no element has an average atomic mass of that number. So, for the question, if it assumes that there are two isomers with 39 amu and 40 amu, then the 40 amu one would be more abundant. But again, there are different possible isotopes and I can't tell what the question wants.

Answer:

Reactivity

Explanation:

a chemical reacting to another chemical is considered a Chemical property because chemicals react with other chemicals differently. Pls PLs give me brainliest

Answer:

reactivity

Explanation:

Answer:

calcium.

Explanation:

because of

thanks

Answer:

Fluorine belongs to the group 7 A so it must have 7 electrons in the oribits so the answer would be A as u count the electrons in the orbits, There are exactly 7 electron

Explanation:

Answer:

D

Explanation:

Zinc's most abundant isotope : Zinc-65

Isotopes are atoms whose no-atom has the same number of protons while still having a different number of neutrons.

So Isotopes are elements that have the same Atomic Number (Proton)

Atomic mass is the average atomic mass of all its isotopes

In determining the mass of an atom, as a standard is the mass of 1 carbon-12 atom whose mass is 12 amu

Mass atom X = mass isotope 1 . % + mass isotope 2.%

To decide zinc's most abundant isotope, then choose the closest mass number

or we can check the difference with the average mass number, if the value is the smallest, then that isotope has the largest abundant

[tex]\tt \dfrac{65.37-64}{65.37}=0.021[/tex]

[tex]\tt \dfrac{65.37-65}{65.37}=0.005[/tex]

[tex]\tt \dfrac{68-65.37}{65.37}=0.04[/tex]

[tex]\tt \dfrac{66-65.37}{65.37}=0.009[/tex]

The closest = Zinc-65(the smallest)

Answer: Heating curves show how the temperature changes as a substance is heated up. Cooling curves are the opposite. They show how the temperature changes as a substance is cooled down. Just like heating curves, cooling curves have horizontal flat parts where the state changes from gas to liquid, or from liquid to solid.

Explanation: Have a blessed day hopefully this helped!

Answer:

Explanation:

The force acting on a body can be found by using the formula

From the question

mass = 10 kg

acceleration = 500 m/s²

We have

force = 10 × 500

We have the final answer as

Hope this helps you

Answer:

hope it helps..

Explanation:

Number of protons

More information: The atomic number is used to identify an element, and the atomic number is the number of protons in the nuclei of an element. Every element has its own unique number of protons, and therefore, atomic number.

Answer:

40.5g

Explanation:

desnity = mass/volume

2.7 = mass/15

mass = 2.7 x 15

mass = 40.5 g

Answer:

The answer is A. Lithium and Sodium

Answer:

Explanation:

Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything.

Answer:

its the science that deals with the properties, composition, and structure of substances like elements and compounds, the transformations they undergo, and the energy that is released or absorbed during these processes

Answer:

A chemical change happens when one chemical substance is transformed into one or more different substances, such as when iron becomes rust.

Explanation:

Answer: when one chemical substance is transformed into one or more different substances.

Explanation: