Chemistry High School

Is this actually right

Answers

Answer 1

Answer:

what?????????i don't see a question

Answer 2

Answer:

Yes

Explanation:

Related Questions

What is wrong with the answer, 10.5 x 10^3? Think about the proper form used to show a number in scientific notation.

Answers

Answer:

1.05 × 10^4.

Explanation:

The proper scientific notation will be

1.05 × 10^4.

the elements boron, silicon, germanium, and arsenic be classified into? *

Answers

The six commonly recognised metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium

8. Which word best describes the element in box number 2?
a а Brittle
b Gas
С Semiconductor
d. Shiny

Answers

Answer:

gas

Explanation:

i think it might be gas

What do we call the molecule that forms when two atoms of the same element are covalently bonded to each other?

Answers

Answer:

Covalent Compounds and Diatomic Elements

Explanation: The two atoms that are held together by a covalent bond may be atoms of the same element or different elements. When atoms of different elements form covalent bonds, a new substance, called a covalent compound, results. Water is an example of a covalent compound.

is ice forming and then melting back into water a physical change

Answers

yes it isssss abcdefghijk

The density of a pure liquid at 25 degrees Celsius was calculated by determining the mass and volume of a sample of the liquid. A student measured the mass of a clean, dry 25.00 mL volumetric flask, filled the flask to its calibration mark with the liquid, and then measured the mass of the flask and liquid. The recorded measurements are shown in the table above. On the basis of this information, to how many significant figures should the density of the liquid be reported?

Answers

Answer

The density of the liquid is 0.82 g/mL.

Explanation:

From the question given above, the following data were obtained:

Mass of empty flask = 18.990 g

Mass of flask + liquid = 39.439 g

Volume of liquid = 25 mL

Density of liquid =..?

Next, we shall determine the mass of the liquid. This can be obtained as follow:

Mass of empty flask = 18.990 g

Mass of flask + liquid = 39.439 g

Mass of liquid =.?

Mass of liquid = (Mass of flask + liquid) – (Mass of empty flask)

Mass of liquid = 39.439 – 18.990

Mass of liquid = 20.503 g

Finally, we shall determine the density of the liquid as follow:

Mass of liquid = 20.503 g

Volume of liquid = 25 mL

Density of liquid =..?

Density = mass / volume

Density of liquid = 20.503 / 25

Density of liquid = 0.82 g/mL

1. Collect data: Create two water cycles using the Gizmo. Each cycle should have at least four steps and should begin and end at the same location. Choose any starting point from the list on the right. When the cycle is complete, choose the PATH tab and write the steps below.

Answers

Answer:

Cycle 1: Lake,atmosphere, clouds,rain,lake

Cycle 2: Atmosphere, clouds, rain, ocean

You will learn in this course that organic compounds have covalent bonds with a significant amount of energy stored in them. This is why we burn fossil fuels to generate energy to heat our homes or drive our cars. Given this information, which of the compounds listed below would you expect to have the most energy is its carbon-carbon bond?

Answers

Answer:

See explanation

Explanation:

This question is obviously supposed to be a multiple choice question but the options are missing.

However, the question intends to test the student's knowledge about combustion of fossil fuels. Fossil fuels are mostly composed of hydrocarbons of different chain lengths.

The longer the chain length, the greater the energy released when the compound is burnt since there are more energy stored in its bonds.

Hence, the correct answer to this question will be the option that contains the greatest number of C-C and C-H bonds.

How do minerals differ from ores?

Answers

Ores: metal/coal (iron, gold, coal)

Mineral: not metal, (Granite, limestone,

1. What is the difference between mineral, ore and rock? Minerals are naturally occurring inorganic solids with a crystalline structure and a definite range of chemical formula. Ores are concentrations of minerals in rock that are high enough to be economically extracted for use.

3. The nucleus:
a. controls all the cell activities
b. controls only part of the cell
c. does not have any activity​

Answers

Answer:

a. controls all the cell activities.

Thank you ☺️

Which isotope of sulfur is the most naturally abundant

Answers

Answer:

The Isotope of sulfur.  

32S 94.99% stable.

33S 0.75%   Stable.

Explanation:

what do you mean by international understanding peace

and cooperation​

Answers

Answer:

International understanding or internationalism is a feeling that the individual is a not only a member of his country, but a member of the world as well.  To ensure world peace.  To prevent world wars.  To promote human welfare. To promote mutual understanding and interdependence.

What is Mercury's proximity to the sun
PLEASE HELPP

Answers

Answer:

46.943 million km

Explanation:

From an average distance of 36 million miles (58 million kilometers), Mercury is 0.4 astronomical units away from the Sun.

From an average distance of 36 million miles (58 million kilometres), Mercury is 0.4 astronomical units away from the Sun.

(I hope this helped ^^)

What is the volume of kristas rock

Answers

Answer:

30

Explanation:

Measure the water rised in the beaker which is 180 and subtract 150 and you get 30

What questions might remain that will one day be answered by new technology?

Answers

Answer:

Can we find a safe cure for cancer?

Explanation:

pls mark brainliest

Radio waves are primarily used to

Answers

Answer:

Radio is used primarily for communications including voice, data and entertainment media.

One way to separate the different kinds of matter in a mixture is through


A. filteration
B. decomposition
C. electrolysis
D. chemical reactions

Answers

The answer is filtration (A).

Creating a mixture is a physical process; as such, the substances that make up a true mixture do not undergo any chemical reactions with one another. It follows, then, that to separate substances that are mixed together, the process to use would be physical, not chemical. Filtration fits that bill: Solutes that do not dissolve in the solvent can be trapped, for example, by a fine mesh whose openings are large enough for the solvent to pass through but too small for the undissolved solute(s) to do so.

Choices B, C, and D are all chemical processes.

Decomposition (B) is the breakdown of a substance into chemically distinct fragments. For example, hydrogen peroxide in a mixture (solution) with water decomposes in the presence of an appropriate catalyst—the products you are left with are water and oxygen gas, which bubbles out of the mixture. But you haven’t separated the hydrogen peroxide from the water—through decomposition, the hydrogen peroxide molecules are broken up and the atoms rearranged to form different molecules. There’s no hydrogen peroxide left to separate anymore. So, decomposition doesn’t separate different substances in a mixture—it transforms them.

Electrolysis (C) is a chemical process that uses an electric current to drive the movement of charged particles (electrons and ions) through a conductive medium. Suffice it to say that this will almost certainly change the chemistry of a mixture. For example, assume you’ve got a mixture of some inert, insoluble solute in water. If you run a very strong electric current through water, you’ll end up decomposing the water molecules themselves into oxygen and hydrogen gases. Again, you haven’t technically separated the solute from the mixture because separation implies that you have the separated substances still around. In this example, you’ve “separated” your solute by chemically transforming your solvent into two different gases; one part of your mixture no longer exists. (Side note: electrolysis of pure water takes quite a bit of energy; on the other hand, tap water, which contains dissolved electrolytes, can be readily decomposed via electrolysis using the current delivered by a standard alkaline battery.)

As a rule of thumb, the suffix (–lysis) usually indicates chemical decomposition, and the stem that precedes the suffix usually indicates what the decomposition process involves. Examples include electrolysis (as we just discussed), hydrolysis (breaking a chemical bond using water), glycolysis (the biochemical process of breaking down glucose into smaller molecules to harness the energy released), and radiolysis (splitting a bond within atoms comprising a molecule using ionizing radiation).

Finally, as should be clear by this point, chemical reactions are not the way to go about separating mixtures. Again, the chemical substances in a mixture retain their chemical identities. Separating the constituents of a mixture essentially entails isolating these substances. Filtration can and does isolate solutes from solvents without altering their chemical identities (assuming the filter itself is chemically inert). A chemical reaction changes a substances chemical identity, and so could not properly be regarded as a method of separation, and only separation.

One way to separate the different kinds of matter in a mixture is through filtration. The correct option is A.

What is filtration?

Filtration is a physical or mechanical process by which two or more substances are of different compositions. These substances can be solid, liquid, or gas.

There are three types of filtration. These are mechanical, chemical, and biological. The different types of filtration are based on a similar principle, which is a mixture of several types poured onto a filter membrane. A specific size of the pore is present in the filter membrane.

The other options are decomposition, which is a process of breaking down substances. Electrolysis is separating charged ions and chemical reactions to form compounds.

Thus, the correct option is A. filtration.

To learn more about filtration, refer to the link:

https://brainly.com/question/14530470

#SPJ6

Please answer it correctly and explain clearly

Answers

Answer:

i think that the children will inherit the brown eyes, it is the best answer since the other things cant be inherited and he dyed his hair blonde

Explanation:

What happens to an egg that is not fertilized?
OIt is reabsorbed by the body
O It travels back up the fallopian tube.
OIt exits during childbirth.
O It is released during menstruation​

Answers

Answer:

D.  It is released during menstruation

Explanation:

The egg that is not fertilized is  released during  the process of menstruation​.

What is menstruation?

Menstruation (also known as a period, among other colloquial terms) is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. The menstrual cycle is characterized by the rise and fall of hormones. Menstruation is triggered by falling progesterone levels and is a sign that pregnancy has not occurred.

The first period, a point in time known as menarche, usually begins between the ages of 12 and 15.Menstruation starting as young as 8 years would still be considered normal.The average age of the first period is generally later in the developing world, and earlier in the developed world. The typical length of time between the first day of one period and the first day of the next is 21 to 45 days in young women. In adults, the range is between 21 and 31 days with the average being 28 days.

Learn more about menstruation,here:

https://brainly.com/question/9864045

#SPJ7

When calculating percent error, the accepted value is in the denominator
True or false

Answers

Answer:

True

Explanation:

The answer is TRUE

Have a nice day / night! :)

GIVING 5 STARS AND BRAINLY IF YOU ANSWER FIRST AND CORRECTLY
Please answer asap. Thank you.

QUESTION:

How many total elements are involved in the process of photosynthesis?

A. 2
B. 3
C. 4
D. 5

Answers

3 there are three different chemical symbols on each side of the equation

A student observes that instant tea dissolves more rapidly in a cup of 250 mL of stirred hot water than in a cup of 250 mL of stirred cold water. Which is the most relevant hypothesis that the student could develop based on this observation?

A.
Volume affects the rate that instant tea dissolves in a solvent.
B.
Temperature affects the rate that instant tea dissolves in water.
C.
Stirring affects the rate that instant tea dissolves in water.
D.
Pressure affects the rate that instant tea dissolves in water.

Please answer my question!

Answers

Answer:

B

Explanation:

In this question, there is no mention of pressure, so we can eliminate answer D. In both cups, it mentions they contain 250 mL of water and both are stirred, so these would be constants. The only difference between the cups is temperature, so temperature must affect the rate that instant tea dissolves in water. Therefore the answer is B.

Chemistry Data Analysis --
7.86 x 10^-15 x 3.9 x 10^-10​

Answers

Answer:

3.065 x 10^-24

Explanation:

hope this helps

A metal object has a density of 2 g/ml. When placed in a graduated cylinder with 500 ml of water, the
water rises to 508 ml. What is the mass of the metal object?

Answers

Answer:

The answer is 16 g

Explanation:

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

mass = Density × volume

From the question

density = 2 g/ml

volume = final volume of water - initial volume of water

volume = 508 - 500 = 8 mL

We have

mass = 2 × 8

We have the final answer as

16 g

Hope this helps you

Convert 122 moles of Methane to liters?

Answers

122 moles of Methane to liters is 2734.5

Is steam a water , oxygen or hydrogen molecule ?

Answers

it’s a water molecule

Answer:

In thermolysis, water molecules split into their atomic components hydrogen and oxygen. For example, at 2200 °C about three percent of all H2O are dissociated into various combinations of hydrogen and oxygen atoms, mostly H, H2, O, O2, and OH.

Explanation:

What would happen if there were 3 protons and 0 neutrons in the nucleus of an atom?

Answers

Answer:

the atom will be positife atom

What is hydrochloride acid plus water plus salt and water

Answers

ANSWER:

It is called Caffeine Hydrochloride.
Formula: HC8H10N4O2Cl

Dilute hydrochloric acid reacts with sodium

2HCl(aq) + Na2CO3(aq) + 2NaCl(aq) + H2O(l) + CO2(g)

A Explain why effervescence is seen during the reaction.

Answers

Answer:

Because the reaction releases CO2 gas

Explanation:

therefore creating an effervecence within the solution as the carbonate dissociates

What metal is Potassium (K)?

Answers

Explanation:

Potassium is a chemical element with the symbol K and atomic number 19. Potassium is a silvery-white metal that is soft enough to be cut with a knife with little force. Potassium metal reacts rapidly with atmospheric oxygen to form flaky white potassium peroxide in only seconds of exposure

Answer:

alkali metal

Explanation:

Potassium is a chemical element with symbol K and atomic number 19. Classified as an alkali metal

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