Chemistry High School

A) remove 1.5ml of liquid
B) add 1.5 ml of liquid
C) remove 0.5 ml of liquid
D) add 0.5 mo of liquid​

A) Remove 1.5ml Of Liquid B) Add 1.5 Ml Of LiquidC) Remove 0.5 Ml Of LiquidD) Add 0.5 Mo Of Liquid

Answers

Answer 1
C..............................

Related Questions

Which event always involves a chemical change A boiling B melting C conducting D burning

Answers

The answer is Burning

Answer:

burning

Explanation:

When a chemical change occurs, the matter is transformed into a new substance. When a substance is burned, it will change into something new. Thus, you know that burning is a chemical change. All the other options are physical properties. The substances may change state, but they will not change identities.

- I took the quiz and got 100%

Hope this helps!

plastics
shells
aluminum
cans
drift
wood
sea
weed
glass
This chart illustrates the type and number of items collected during a clean up of a
beach. Based on the chart, what approximate percentage of the total items result
from the action of people?

Answers

It will be weed because wood is sum else

What are two examples of a chemical change

Answers

Answer:

1.Cooking an egg

2. Burning wood

Hope it helps :)

Answer:

1.Mixing of sodium with water

2.rusting of iron


Step by step explanation:

help me plz, ASAP . (25 points)

Answers

Answer:

what is the question

Explanation:

A student says: Potassium (K) always has 20 protons. Explain why the student is incorrect.

Answers

Explanation:

19

Potassium/Atomic number

This tells you that potassium has 19 protons and - since the number of protons is the same as the number of electrons- also 19 electrons. To find out the number of neutrons you have to look at the atomic mass or weight of the element. This can also be found in the periodic table.

Is the copper in a copper wire a homogeneous or heterogeneous mixture

Answers

Yes it is because it’s a copper wire and not brass
The answer is homogenous. Homogeneous means “the same” and heterogenous means the opposite. The copper in a copper object would make it the same

If one end of an iron bar is heated, what causes thermal energy to transfer to the other end? a radiation b conduction c heat of fusion d convection

Answers

Answer:

Option B:

Conduction

Explanation:

Conduction is the transfer of heat from one molecule to another between two solids that are in direct contact with each other. For the conduction of heat to occur, the medium involved must be solid. This is because the molecules of solids are closely packed together and they cannot freely move about. The heat flowing through them can easily be passed on from one molecule to the other until it reaches all the parts of the object. This is exactly what will happen to the iron bar. Thermal energy from one end of the bar will get transferred between the molecules of the iron bar until it reaches the other end.

Convection on the other hand involves the transfer of heat through a liquid medium.

Radiation involves teh transfer of heat in a vacuum.

Answer:

b) conduction

Explanation:

An unknown Element X is discovered. Element X is found to have varying numbers
of valence electrons and has a high melting point. Which group does Element X most
likely belong to?

Transition Metals
Halogens
Alkali Metals
Noble Gases

Answers

I think transition metals

TIME REMAINING
01:29:12
Which technology has helped improve scientists' ability to gather scientific data about the movement of sea turtles?
O satellite tracking
O thermometers
O probeware
microscopes

Answers

the first one satellite tracking

Answer:

I believe the answer is A. Or the 1st dot.

Explanation:

How to calculate the amount of water needed to dilute a solution?

Answers

Answer:

Suppose you must prepare 400 ml of a disinfectant that requires 1:8 dilution from a concentrated stock solution with water. Divide the volume needed by the dilution factor (400 ml / 8 = 50 ml) to determine the unit volume. The dilution is then done as 50 ml concentrated disinfectant + 350 ml

Which substance is composed of only one type of atom? A: water B: sugar C: salt D: gold

Answers

Answer:

Gold

Explanation:

water = H2O(3 atoms)

Sugar = C12H22O11 (45 atoms)

Salt = NaCl ( 2 atoms)

Gold = Au ( 1 atom)

A substance that is composed of only one type of atom is gold. Thus, the correct option for this question is D.

What is an atom?

An atom may be defined as the smallest unit of any matter that has the ability to form a chemical element. An atom may also be characterized as a particle of matter that uniquely illustrates a chemical element.

Water is composed of two atoms which are hydrogen and oxygen. Its chemical formula is [tex]H_20.[/tex] Sugar is a complex compound that consists of atoms of Carbon, hydrogen, and oxygen. Its chemical formula is [tex]C_6H_1_2O_6.[/tex] Salt typically consists of atoms of sodium and chlorine. Its chemical formula is NaCl.

Therefore, gold is a substance that is composed of only one type of atom. Thus, the correct option for this question is D.

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The forces between water molecules are stronger than the forces between ethanol molecules. Which liquid would probably be most difficult for an insect to walk on?

Answers

An insect would have a harder time walking on ethanol than it would water. Water has stronger intermolecular forces which leads to higher surface tension. The higher surface tension allows for the insect to be easily supported

Answer:
An insect would have an easier time walking on the surface of water than on the surface of ethanol.
Water’s stronger intermolecular forces lead to higher surface tension.
Higher surface tension allows water to support the insect.

is pepperoni pizza an element, compound,
heterogeneous mixture, or homogeneous mixture?

Answers

Pepperoni pizza is a heterogeneous mixture because you can see the ingredients.

Pepperoni pizza is a heterogeneous mixture. Therefore, option C is correct.

A heterogeneous mixture is a type of mixture that consists of visibly different substances or phases that are not uniformly distributed. In a heterogeneous mixture, the different components can be easily distinguished and separated. The composition and properties of the mixture can vary at different locations within the mixture.

In a heterogeneous mixture, the substances do not blend together at the molecular level, unlike in a homogeneous mixture where the components are uniformly distributed.

Learn more about heterogeneous mixtures, here:

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A substance has a density of 3.56 g/mL and a mass of 5668 g. What is the volume?

Answers

Answer:

The answer is

1592.13 mL

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

[tex]volume = \frac{mass}{density} [/tex]

From the question

mass of substance = 5668 g

Density = 3.56 g/mL

The volume is

[tex]volume = \frac{5668}{3.56} \\ = 1592.1348314[/tex]

We have the final answer as

1592.13 mL

Hope this helps you


Which statement accurately describes the chemical symbol of an element?

O The chemical symbol is always a single letter.
O The chemical symbol always starts with the same letter as the name of the element.
O The chemical symbol always begins with a capital letter.
OThe chemical symbol can be shared by more than one element.

Answers

Answer:

The chemical symbol always begins with a capital letter.

Explanation:

Answer:

c

Explanation:

The chemical symbol of an element always starts with an chemical letter so here the answer is that the chemical symbol always begins with a capital letter.

It can be seen in the different elements chemical symbol .

For example, Tin is having chemical symbol as Sn while lead is having chemical symbol as Pb.

In both these elements, the chemical symbol starts with a capital letter but none of these have their symbol starts with same letter as their name.

Harvey mixes two liquids. Which observation of the new mixture most likely indicates a precipitate is O A. a cloudy appearance OB. a bubble formation OC. a change in color O D. a change in odor​

Answers

Answer:

A cloudy appearance!!

Explanation:

Hope it helps, just took a quiz.

Answer:

a cloudy appearance

Explanation:

i have big brain

29.4 mL of an CH3COOH solution were titrated with 18.5 mL of a 0.0175 m LiOH solution to reach the equivalence point. What is the molarity of the CH3COOH solution

Answers

Answer:

0.11 M

Explanation:

The computation of molarity of the CH3COOH solution is shown below:-

[tex]M_2 = \frac{M_1V_1}{V_2}[/tex]

Where,

[tex]M_1[/tex] = Molarity of LioH = 0.0175

[tex]V_1[/tex] = Volume of LioH = 18.5 ml

[tex]V_2[/tex] = Volume of CH3COOH = 29.4 ml

Now, we will put the values into the formula

[tex]= \frac{0.0175\times 18.5}{29.4}\\\\ = \frac{0.32375}{29.4}[/tex]

Which gives result

= 0.011 M

Therefore for computing the molarity of the CH3COOH solution we simply applied the above formula.

Answer: 0.11

Explanation:

Who want to see me with another kid in 2021? What are some great baby names for boy's and girl's?
*plz don't delete dis question****

Answers

Answer:

Artemis Mae (girl)

Apollo Kay (boy)

 Kayden Jade (girl/boy)

  Karyissa Reyna (girl)

   Poseidon Sea (boy)

    Zeus Sky (boy)

     Iris Hebe (girl)

      Faye Ares (girl/boy)

       Amphitrite Hera (girl)

          ~Lylliara~

2. How many kilometers are in 8432 meters?

Answers

Answer:

8.432 Kilometers

Explanation:

This is the answer because 1 kilometer equals to 1,000 meters:

1) Divide 8432 with 1,000

2) Once you divide, you will get 8.432 as your answer

Hope this helps!

How many values of these of these trials can be considered accurate?

Answers

Answer:

go to google

Explanation:it all ways work

Calculate the number of moles for 12.044*10^23 number of helium atoms

Answers

Answer:

Explanation:

number of moles=number of particle (atoms)/avogadro number (NA)

we know that avogadro number is equal to 6.23*10^23

given number of atoms=12.044*10^23

therefore

moles=12.044*10^23/6.23*10^23=1.9=2

help me please i need to sleep

Answers

Cloud is a gas.

ice is a solid.

snow is a solid.

steam is a gas.

rain is a liquid.

When heating test tubes, always slant them away from yourself and others.
True
False

Answers

Answer:

true

Explanation:

Question 3 of 10
Which of the following elements shows little reactivity?
A. Potassium (K)
B. Sulfur (S)
C. Fluorine (F)
O D. Argon (Ar)

Answers

Answer: Correct answer is

Ar- Argon

Explanation:

A P E X :)

HELP! WILL GIVE BRAINLY!!!

Density is an intensive physical property because the density of a given substance does not change with the size of the sample. (2 points)
True
False

Answers

Answer:

True

Density = mass/volume

Suppose that a block has a mass of 20 g and a volume of 20 cm^3.

Density = 20 g/20 cm^3 = 1 g/cm^3

Now, you cut the block in half. The half-block has a mass of 10 g and a volume of 10 cm^3.

The density of the half-block is

Density = 10 g/10 cm^3 = 1 g/cm^3

The density stays the same, even though the size of the sample has changed.

Explanation:

Answer:

✅True

Explanation:

Density is an intensive physical property because the density of a given substance does not change with the size of the sample.

IamSugarBee

tony ate 3/4 of the pizza. mike ate 7/16 of the pizza. how much more did tony eat than mike

Answers

Answer:

5/16

Explanation:

make them have a common denominator

3/4 needs to be times by 4

so it's

12/16 then you minus 7/16

the answer is

5/16

Answer: 5/16

Explanation:

Multiply tonys 3/4 by 4 in order to get the same denominator as mike's 7/16. You should get 12/16 since 4x3=12, and now you can subtract the smaller fraction 7/16 from the bigger one 12/16, you should get a difference of 5/16.

The second part of the cell theory is that he cell is the smallest unit of _______ and _______ in living things​

Answers

Answer:

a.life

b.organization

⁴₁₂Mg and ²⁴₁₂Mg⁺² can be defined as
isotopes
different elements
ions
average atomic masses

Answers

ions because it’s still the same element, however the charge has changed

Which statement below correctly identifies the number of subatomic particles inside and outside the nucleus of an argon atom?
A. There are 18 particles inside the nucleus and 18 particles outside the nucleus.
B. There are 40 particles inside the nucleus and 18 particles outside the nucleus.
C. There are 40 particles inside the nucleus and 40 particles outside the nucleus.
D. There are 40 particles inside the nucleus and 22 particles outside the nucleus.

Answers

Answer:

A

Explanation:

Argon atom is a noble gas. In argon atom, there are 18 particles inside the nucleus and 18 particles outside the nucleus. Thus, the correct option is A.

What is Argon atom?

Argon is a non-metal element. It belongs to the group 18 (VIIIa) of the modern periodic table of chemical elements. This group is also called the noble gases group of the periodic table.

The argon atom is a noble gas which is made up of 18 protons and 18 electrons which are present inside the nucleus and outside the nucleus of the atom, respectively. The atom contains eight electrons in its outermost shell. Argon is a colorless and an odorless gas under the normal conditions. When argon is activated by the treatment of a high-voltage electric field, it emits a violet-colored light.

Therefore, the correct option is A.

Learn more about Argon here:

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An unknown solid has a mass of 837.21 g. The volume of the solid, determined by water displacement is 37.00 mL. Calculate the density of the solid.

Answers

Answer:

The answer is

22.63 g/mL

Explanation:

The density of a substance can be found by using the formula

[tex]Density = \frac{mass}{volume} [/tex]

From the question

mass = 837.21 g

volume = 37.00 mL

The density of the substance is

[tex]Density = \frac{837.21}{37} \\ = 22.62729[/tex]

We have the final answer as

22.63 g/mL

Hope this helps you

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