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PLZ HELP ASAP i am doing a test and i need help. I WILL BE DOING BRAINLIEST TO THE FIRST PERSON WHO REPLYS
When dynamite explodes, it releases a large amount of light and heat. This is an example of _____.

slow combustion
rapid combustion
an exothermic reaction
an endothermic reaction
a chemical change
a physical change

Answers

Answer 1

Answer

Rapid Combustion

Explanation:

An explosion is a combustion and a quick reaction, That makes it rapid


Related Questions

An electron has a mass

Answers

yes an electron has mass

If the chemical reaction AB + CD → AD + BC releases heat, what is true of the stored bond energy of the reactants and products?

Answers

Answer:

Being a reaction that releases heat, it is considered exothermic.

Explanation:

That is why if we consider it exothermic, the heat that is released to the medium is chemical energy lost from the interaction between the chemical bonds throughout the reaction. Having said this, we can affirm that the energy of the links of the products IS LESS than that of the REAGENTS, otherwise it happens in the endothermic ones, where it occurs in a vice versa.

These processes tend to have greater entropy and greater disorder in the reaction, greater kinetic energy between the particles.

A chemical property of oxygen is that it ____
a.) is the most abundant element in earth's crust
b.) combines with hydrogen to form water
c.) boils at -183 Celcius
d.) has a density of 1.43 g/l
WILL GIVE BRAINLEST + THANKS! <3

Answers

Answer:

the answer you are searching for is

It’s B combines.....

Can anybody can solve this PLEASE

Answers

Answer:

B has highest stability

Explanation:

as its octet is complete

plz mark brainliest if it helps

Can someone pls help me I appreciate it

Answers

Answer:

b, e, f

Explanation:

When copper metal is heated to 1100 oC it melts. Is this a chemical or physical change? Explain your answer

Answers

Answer:

it is a physical change

It is Physical change

4. NH4Cl
What is the compound?

Answers

Answer:

ammonium chloride

Explanation:

Because NH is ammonium and Cl is chlorine

what is the molecular formula of Alkyne? ​

Answers

Answer:

CnH2n-2 where n is the number of carbon atoms

Explanation:

for example :

pentayne

C5 H (5x2 -2 )

C5H8

Which of the following describes what a scientist does?

Answers

Answer:

people who discover new things fyi you dont have any answer choices on there

Explanation:

there are different type of scientist

Answer:

A scientist asks questions about the world.

Explanation:

Calculate the following using the correct significant digits: 12.354 + 17.5?​

Answers

Answer:

29.854

Explanation:

12+17=29

.354+.5= 854

Is pure Iron a pure substance or mixture

Answers

Answer:

Pure iron is a pure substance.

Explanation:

Pure iron is a pure substance because it's chemical composition stays uniform regardless of it's sample size. It's matter that appears uniform in appearance and composition, no matter how small the sample size. An example of a pure substance includes pure iron

why do neutral atoms lose or gain electron?​

Answers

Answer: Atoms that lose electrons acquire a positive charge as a result because they are left with fewer negatively charged electrons to balance the positive charges of the protons in the nucleus. Positively charged ions are called cations.

Atoms are made up of subatomic particles and gain or lose electrons to achieve the full electronic configuration and its octet.

What is an atom?

The particle of matter has been constituted of at least a proton termed an atom. The electrons in orbitals and the protons and neutrons organized in a nucleus make up the main components of an atom.

Cations are the name given to ions that donate their electron. While anions are atoms that get extra electrons from other species. Seventeen protons and seventeen electrons make up a neutral chlorine atom. The octet needs one electron to be complete. Chlorine has the electrical configurations 2, 8, and 7, and will remain stable if it accepts an electron from a cation.

Therefore, atoms frequently absorb and lose electrons to maintain stability.

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the amount of water vapour in the air is caleed

Answers

Answer:

Absolute humidity

Explanation:

How many valence electrons does the element with the following electron configuration have? 1s22s22p63s23p64s23d104p4

Answers

Explanation:

please refer to the attached file (English)

s'il vous plaît se référer au fichier ci-joint cher compagnon (French)

The number of valance electron is 6

Valence electrons are the electrons found in the outermost shell of an atom.

The given atom has the following electronic configuration;

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴

The number of valence electron in a given electronic configuration is determine as follows;

if the last configuration ends in s-orbital, the valence electron is the number of electron attached to the s-orbitalif the configuration ends in p-orbital, the number of valence electron is obtained by adding the electrons in p-orbital and s-orbital

The number of valance electron is found in this sub-orbitals = 4s², 4p⁴

The number of valance electron = 2 + 4 = 6

Thus, the number of valance electron is 6

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Which statement describes a property that is unique to metalloids?
Metalloids are shiny.
Metalloids are semiconductive.
O Metalloids are solid.
O Metalloids are brittle.

Answers

The statement that described a property that is unique to metalloids would be that they are semiconductive.

Generally, semiconductors are material that at equilibrium between the conductive nature of conductors and non-conductive nature of insulators. In other words, semiconductors are not as conductive as conductors neither are they total insulators.

Semiconductivity is a property that is unique to metalloids because their electrons are more strongly bound to the nucleus of their atoms than those of metals.

Shiny, solid, and brittleness are properties that are shared among a wide variety of materials but semiconductivity is a property that is unique to metalloids.

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Answer: Bbbbb

Explanation:


How many protons are in the following atom?

Answers

Answer:

This is Lithium and Lithium had 3 protons

Explanation:

Note:

The number that is red (3) is the proton number.

The top left number(7) is the nucleon number.

If the question ask the electron number.. It's also 3 because PROTON AND ELECTRON ARE THE SAME

Hope this is correct and helpful

HAVE A GOOD DAY!

Atoms of different
can be distinguished from
each other by the number of protons (atomic number) in their
nucleus.

Answers

Answer:

Elements

Explanation:

An element is defined by the number of protons in its nucleus.

0.15 gm of metallic oxide was dissolved in 100 ml of 0.1 N H2SO4 and 25.8 ml of 0.095N NaOH were used to neutralise the remaining H2SO4.Calculate the equivalent weight of metallic oxide and metal.
Ans: metallic oxide=19.87
metal=11.87​

Answers

Answer:

Explanation:

25.8 ml of .095 N NaOH is needed to neutralise the remaining acid

equivalent of NaOH used = 25.8 x .095 / 1000 = .002451 gm equivalent .

acid remaining = .002451 gm equivalent .

acid initially taken = 100 ml of .1 N  /  1000  = . 01 gm equivalent

acid reacted with metal = .01  -.002451 = .007549 gm equivalent

This must have reacted with same gram equivalent of metal oxide

.007549  gm equivalent = .15 gm of metal oxide

1 gm equivalent = 19.87 gm

equivalent weight of metal = 19.87 - equivalent weight of oxygen

= 19.87 - 8 = 11.87 .

1

An atom has 14 protons, 17 neutrons, and 18 electrons. What is its mass number, atomic number, and charge?

Answers

Answer:

Mass number = 31Atomic Number = 14Charge = -4

Explanation:

14 protons

17 neutrons

18 electrons

Mass number = ?

Mass number = protons + neutrons.

[tex]Mass\:number = 14+17\\\\Mass \:number = 31[/tex]

Atomic number = ?

The number of protons = atomic number.

Atomic number = 14

Charge = ?

The charge of an element = number of protons minus the number of electrons.

[tex]Charge=14 -18\\\\Charge = -4[/tex]

DONE
One of the following properties was originally used to arrange elements on the periodic table, but is no
longer used to organize the modern version. Which property fits this description?
atomic number
atomic mass
chemical properties
DONE
Intro
FR

Answers

Answer:

The correct answer is atomic mass

Explanation:

on engenuity

Answer:

The correct answer is atomic mass.

Explanation:

I took the quiz on edginuity

Explain how original mass of dry ice compares with the mass of carbon dioxide gas?

Answers

The freezing temperature at a normal sea level air pressure is negative 78.5 degrees.

What did researchers at Virginia Tech try using to help reforest post-mining site soil?

Answers

Answer:

Researchers at Virginia Tech decided to try using biochar to help reforest the post-mining site soil. They got permission to apply a layer of biochar to a post-mining site before it was reseeded and replanted.


To produce 3.00 L of a 1.90 M solution of sodium hydroxide (NaOH), how many grams of sodium hydroxide must be dissolved?

Answers

Therefore, to make 3.00 L of a 1.90 M solution of sodium hydroxide, 228 grammes of sodium hydroxide must be dissolved.

For a 1M NaOH solution, how much NaOH dissolves in 1 gallon of water?

We need to dilute 40 grammes of sodium hydroxide in one litre of water in order to create a solution with a 1 molar concentration. You can make 1M NaOH solution by weighing 39.9 g of NaOH granules and dissolving them in 1 litre of water.

We can use the following method to calculate the mass of sodium hydroxide needed to make the solution:

m = M × V × MW

where:

m = mass of solute (in grams)

M = molarity of the solution (in moles per liter)

V = volume of the solution (in liters)

MW = molecular weight of the solute (in grams per mole)

Substituting the given values, we get:

m = 1.90 mol/L × 3.00 L × 40.00 g/mol

m = 228 g.

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The mere exposure effect _____.

A.happens when familiar things are selectively ignored
B.causes people to dislike things they are familiar with
C.can cause people to reject unfamiliar things
D.is a bias against familiar things

Answers

Answer: A

Happens when familiar things are selectively ignored.

What is the mass of a 15mL sample of mercury? (Density of mercury is: 13.55 g/cm3) (show your work)

Answers

Answer:

The answer is

203.25 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

volume of mercury = 15 mL

density = 13.55 g/cm³

The mass is

mass = 13.55 × 15

We have the final answer as

203.25 g

Hope this helps you

Plant cells have large central ________________ . These are also found in animal cells but are much smaller Question 3 options: Chloroplast Vacuole Mitochondria Cell Membrane

Answers

Answer:

vacuoles

Explanation:

Vacuoles are not only found in animal and plant cells, but on every given diagram vacuoles are huge and singular on a plant cell. Animals however, there are multiple and are much smaller

What two properties of matter are used to determine density?

Answers

Density = mass/volume

how many kilojoules is 1,500,000 calories

Answers

Answer:

1 cal = 0.004187 kJ

1,500,000 cal = 6280.5 kJ

HELP THIS HAS TO BE TURNED IN IN AN HOUR

Answers

Answer:

B

Explanation:

Density = 2 g/ml
Volume = 20 ml
What is the mass?

Answers

Answer:

The answer is 40 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

volume = 20 mL

density = 2 g/mL

The mass is

mass = 20 × 2

We have the final answer as

40 g

Hope this helps you

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