Answer:
To say to you that you've made a mistake
Explanation:
Can yall help me i suck at this and rlly need help
Answer:
Fireworks is exothermic
Endothermic is Cookies
Explanation:
Exothermic reactions transfer energy to the surroundings and the temperature of the surroundings increases. Endothermic reactions take in energy and the temperature of the surroundings decreases.
Hope this helps
Chelsea adds a 65% acid solution to 25 milliliters of a solution that is 30% acid. How much of the 65%
acid solution should be added to create a solution that is 40% acid?
Answer:
10 ml
Explanation:
The concentration of the acid solution Chelsea adds to the 25 milliliters of 30% acid solution = 65%
The concentration of the acid solution Chelsea requires = 40%
The volume, X, of the 65% acid solution required is given as follows;
65% × X + 30% × 25 = 40% × (25 + X)
As fractions, we have;
0.65 × X + 0.3 × 25 = 0.4 × (25 + X)
0.65·X + 7.5 = 10 + 0.4·X
0.65·X - 0.4·X = 10 - 7.5
0.25·X = 2.5
X = 2.5/0.25 = 10
X = 10 ml
The volume of the 65% acid that should be added to create a solution that is 40% acid = 10 ml.
How many nitrogen atoms are in the chemical
formula below?
5C8H10N402
Answer:
4 ATOME nitrogen in the formula
There are 20 nitrogen atoms in the chemical formula mentioned.
What is chemical formula?Chemical formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.
Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form is called empirical formula.
It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.They are used to describe the chemical reactions.
There are four types of chemical formula:
1)empirical formula
2) structural formula
3)condensed formula
4)molecular formula
Learn more about chemical formula ,here:
https://brainly.com/question/11995171
#SPJ2
How many oxygen atoms are in the formula Tetrasulfur pentoxide?
a. 3
b. 4
c. 5
d. 2
PLZ HELP WILL MAKE U BRAINLIEST! what is acceleration???
Answer: Acceleration is when something accels.
Or, in simple terms, when the velocity changes rapidly to a very quick speed.
Hope this answer helps you!
Best of Regards!
What element have 5 energy levels of electrons. Which as an atom the last electron is found in the 5p^3
Answer:
I hope this answer is correct
Explanation:
Element having electronic configuration 1s
2
,2s
2
,2p
6
,3s
2
,3p
6
,3d
10
,4s
2
,4p
6
,4d
10
,5s
2
,5p
3
Which student is responses are correct?
Answer:
Neutrons: Electron cloud
Explanation:
Which element would be the least similar to magnesium (Mg)?
A. Sr
B. Na
C. Be
D. Ca
Answer:
B: NA
Explanation:
this is the apex answer
What strategy should be done to provide quality education without discrimination?
Explanation:
The Committee has already adopted general comment No. ... Non-discrimination - education must be accessible to all, especially the most ... developmental strategy for its school system.as poverty and discrimination and to provide education of sufficient quality, in a manner that ensures children can benefit from it.
A substance is at a temperature and pressure that places it directly on the liquid-vapor equilibrium line of its phase diagram. Which phase will it become if the temperature increases while the pressure remains constant?
g. I am present in meteorites and in the sun. When pure, I am a strong, lustrous, white metal, with a low
density. I have excellent corrosion resistance. I burn in air and am the only element that burns in
nitrogen. I am marvelous in fireworks. What am I, and what is my symbol?
I think the answer should be titanium, the symbol is Ti.
PLS HELP!!! ASAP!! 10 POINTS!!
Which of the subatomic particles are most responsible for the identity of an element?
neutrons
electrons
atoms
protons
Protons
Protons are the subatomic particle that determines the identity of an element.
Answer:
Explanation:Protons and neutrons are located in the nucleus of an atom and determine the mass of an atom. Protons have a positive electrical charge and electrons have a negative electrical charge. Atoms that have the same number of protons and electrons do not have an electrical charge.
A brick delivery truck parks on a roadside scale that measures 4 m by 6 m. If the brick truck weighs 60 000 N, what pressure does the scale put on the spring below?
Explanation:
Area = Length × Breadth
A = 4 × 6
A = 24m square/ 24m sq.
Force = Pressure × Area
Force = 60,000 N/ 60,000 Newton
Pressure = Force/ Area
P = 60,000/24
P = 2500 Pa
define empirical formula and molecular formula with example of each
please help me!! thank you so much!!
Answer:
13.75
Explanation:
gets halved every 8 days so halved twice
Pleaseee help it’s timed!!
Answer:
voliiviloou
Explanation:
volaiviolu
Answer:
Rows
Explanation:
Use “impact force” in a sentence.
Answer:
The impact force of a car hitting a building can traumatize someones body.
Explanation:
if there is a sample 50 grams of naoh how many grams are na
Answer:
Which number is IRRATIONAL? A) √12 B) √36 C) √64 D) √144
Explanation:
In which cell will the molecules diffuse out A or B
The layer of skin that forms the fingerprint is called the
Answer:
Explanation:
The fingerprints are produced from a layer in the skin called the papillary layer, which is a layer within the dermis layer of skin. It produces an extra thick layer to form the ridges of fingerprints.
Answer:
Dermis
Explanation:
The inner layer of skin is called the dermis. It is thicker and provides the protection and support that the skin provides the body. The two layers are separated by the basement membrane. Fingerprints are produced by the epidermis.
A substance with a pH of 3 has more ____________ions than ____________ions
Answer:
Hydrogen... Hydroxide
Explanation:
The number in pH is a logarithm, so when something has a higher pH by 1, it is 100 times more powerful.
Besides, the H in pH is Hydrogen.
how is iodine 131 different from a normal atom of iodine?
Answer:
Iodine 131 is an unstable/radioactive isotope of iodine and a normal atom of iodine is stable.
Explanation:
Explain why rain water is not pure
Answer:
before it evaporated into the air, it was on the Earth...and it could have been contaminated/dirtied. There isn't a process during evaporation that cleans water...you have to purify it yourself.
Explanation:
Autism is a disability that results from a disorder in the central nervous system. It has been speculated that the increasing number of cases of autism in recent years is due to the increase in the number of vaccinations given to young children. What might be another possible explanation for this phenomenon?
Answer:
Explanation:
As described in the question, autism is a disability that arises from a disorder in the central nervous system which is actually characterized by abnormality in the brain structure and then function. Autism is known for symptoms such as challenges with communication and interaction and some obsessive behaviors. While there is generally no known scientific cause for autism but trends have suggested that vaccination in young children causes autism.
However, genes could also be involved in this phenomenon because there have been reports of unusual genetic sequence in children that have autism. Hence, there is a possibility that vaccination actually triggers this genetic sequence which is then expressed as autism in the children.
Please note this isn't a scientific fact and just a possibility as requested in the question.
please help timed !! due today rn!!what does thermal equilibrium mean
Which two parts are needed to make a neutral atom of nitrogen A. Electron clouds with a total of 14 electrons B. Electron cloud is a total of seven electrons C. A nucleus with seven protons and seven neutrons D. A nucleus with three protons and four neutrons
Answer:
B. Electron cloud is a total of seven electrons
C. A nucleus with seven protons and seven neutrons
Explanation:
An atom is consist of three subatomic particles: electron, proton, and neutron. Proton are positively charged particles and neutron have neutral charge, they both are present inside the nucleus in the center of the atom whereas electrons are negatively charged and surround the nucleus in a definite orbit.
Nitrogen is an element with 7 electrons in its outer orbit. As electrons are negatively charged so nitrogen atom will require 7 protons inside the nucleus to form a neutral atom of nitrogen. So, A neutral atom of nitrogen will consist of 7 electrons and 7 protons.
As, neutron has neutral charge so it will not affect the composition of neutral atom of nitrogen.
Hence, the correct options are:
"B. Electron cloud is a total of seven electrons
C. A nucleus with seven protons and seven neutrons ".
Answer:
B and C
Explanation:
Groups of specialized cells working together are called
Groups of specialized cells working together are called tissue
write the addition reaction of butane and bromine
A piece of aluminum has a mass of 12.0 g. When it is placed into a graduated
cylinder with 14.0 mL of water, the water level rises to 18.5 mL. What is the density
of aluminum?
0 2.66667g/ml
O 2.67 g/mL
O 2.667g/mL
O 2.7 g/mL
Answer:
The answer is 2.7 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 12 g
volume = final volume of water - initial volume of water
volume = 18.5 - 14 = 4.5 mL
So we have
[tex]density = \frac{12}{4.5} \\ = 2.66666666...[/tex]
We have the final answer as
2.70 g/mLHope this helps you
Why don't molecular compounds conduct electricity when dissolved in water?
Answer:
Ionic compounds conduct electricity when dissolved in water, because the dissociated ions can carry charge through the solution. Molecular compounds don't dissociate into ions and so don't conduct electricity in solution.