Answer:
Si dos átomos tienen el mismo "Z" pero diferente "A" se trata de Isótopos.
Explanation:
Cada elemento químico se caracteriza por el número de protones de su núcleo, que se denomina número atómico Z. Pero en el núcleo de cada elemento también es posible encontrar neutrones, cuyo número puede variar. La masa atómica (A) se obtiene sumando el número de protones y de neutrones de un núcleo determinado.
Un mismo elemento químico puede estar constituido por átomos diferentes, es decir, sus números atómicos son iguales, pero el número másico es distinto. Estos átomos se denominan isótopos del elemento. Si a un átomo se le añade un neutrón, se convierte en un isótopo de ese elemento químico. En otras palabras, se denomina isótopos a los átomos de un mismo elemento, cuyos núcleos tienen una cantidad diferente de neutrones.
Los isótopos de un elemento tienen las mismas propiedades químicas, pero difieren algo en sus propiedades físicas.
Entonces, si dos átomos tienen el mismo "Z" pero diferente "A" se trata de Isótopos.
Air pressure is greatest near the surface of the Earth in the _______.
Question 7 options:
Thermosphere
Mesosphere
Troposhere
Exosphere
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
Air pressure is greatest near the surface of the Earth in the Troposphere .
Which of the cells shown is a prokaryote?
A) muscle cell B) nerve cell C) bacterium D) red blood cell
Which is used in radioactive dating?
O A. carbon-14
O B. index fossils
O C. hydrochloric acid
O D. law of superposition
Is this true or false for this question?!
Answer:
True, Electrons are way smaller then protons
Explanation:
Which is an example of chemical weathering?
20.What is it called when particles in a solid or liquid move slower and closer
together?
Answer: freezing
Explanation:
when the atoms or molecules in a solid or liquid are moving slower and closer together, it is called brrrrrrrrr freezinf
1.The chemical or substance used to start a reaction are called
Answer:
The substance (or substances) initially involved in a chemical reaction are called reactants or reagents.
Explanation:
Answer:
The chemical or substances used to start a reaction are called reactants.
pls help with this !!!!!!
Answer:
thank you for the update on
Answer:
es la dos
Explanation:
what is the only process that removes carbon from the atmosphere
Answer:
Photosynthesis process
Explanation:
Photosynthesis removes carbon dioxide naturally — and trees are especially good at storing carbon removed from the atmosphere by photosynthesis.
Which of the three objects has the greatest density? Why? (GOLD BARS/GOLD COINS/GOLD CHAIN)
Answer:
They all have the same density
Explanation:
Density is an intensive physical property, meaning that as long as the chemical formula is the same, that specific intensive physical property will be the same. For example. One kilogram of feathers has the same mass as one kilogram of bricks. Why? They both have a mass of one kilogram.
It's the same thing here. Since all the objects are (assumed to be) made up of 100% gold, they would all have the same density regardless of the mass. For extra points, say the density of each object is [tex]19 \frac{g}{cm^3}[/tex].
Answerthey all have the same density Explanation:
write the solubility equilibrium for the slightly soluble salt caf2.
Answer: write the solubility equilibrium and the solubility-product constant expression for the slightly soluble salt CaF2 CaF2 (s) <---> Ca2+ (aq) + 2F- (aq) Ksp=[Ca2+][F-]2.
Explanation:
the _____ of an object is where the object is in relation to another object or points of reference. A motion B force C gravity D position
d position
position is the reference for the points of the object
Please someone help!!!!!!!!
Answer & Explanation:
For the water to H2 and O2 problem:
1) Reactant is H20, it is to the left of the arrow.
2) Products are H2 (gas) and O2 (gas) because it is to the right and what is created.
For the CO2 + water -> Glucose + Oxygen problem:
1) Reactant is CO2 and H2O, it is to the left of the arrow and what is being changed.
2) Products are C6H12O6 (glucose) and O2 (gas) because it is to the right and what is created.
How many grams in 2.33 mols of H20 (water)?
Answer:
41.9866
Explanation:
18.02x2.33
Hope this helps!
(please make me brainleist I need to level up)
PLEASE ANWSER CORRECTLY!! I WILL MARK BRAINIEST!! LOOK AT PICURE!!
What is the scientific method webquest answers?
What type of bond forms between two atoms
with similar EN values (between nonmetals)?
covalent or ionic
Answer:
I'm sure it's covalent bond hope this helps
How many cm of a solution of 0.100 mol dm NaOH are required to completely -3 neutralize 25.0 cm of 0.250 mol dm H3PO4?. a) Write a balanced equation for the reaction (4 marks) b) How many moles of H3PO4 need to be neutralized? (1 marks) c) How many moles of NaOH are needed to neutralize the H3PO4? (1 marks) d) How many cm of 0.100 mol dm NaOH contain the moles in question 5(©) above? (1 marks)
Answer:
Explanation:
How many cm of a solution of 0.100 mol dm NaOH are required to completely neutralize 25.0 cm of 0.250 mol dm H3PO4?.
a) Write a balanced equation for the reaction NaOH to neutralize (4 marks
?. ) 25.0 cm of 0.250 mol dm H3PO4
H3PO4 + 3NaOH----------> Na3PO4 +3 H2O
b) How many moles of H3PO4 need to be neutralized? (1 marks)
25.0 cm3 of 0.250 mol dm3 H3PO4: 1 liter has 0.25 moles. 100 ml has 0.025 moles 25 ml has o.025/4 molea or 0.00625 moles)
c How many moles of NaOH are needed to neutralize the H3PO4? (1 marks)
for every moles of H3PO4, WE NEED 3 MOLES OF NaOH. FOR 0.00625 MOLES WE NEED 3X 0.00625 =0.01875 MOLES OF NaOH
d) How many cm3 of 0.100 mol /l NaOH contain the moles in question 5(©) above? (1 marks)
1 L CONTAINS 0.100 Moles
100 ml contains 0.010Moles
we need 187.5 ml since (187.5 X 0.100)/1000=0.01875
what do you think life on earth will be like if chemistry had not been put to practical use
Explanation:
Archaism
Things on Earth would be unexplainable
how many stereoisomers are possible for 2,4-heptadiene?
Answer:
Total of 4 isomers of hepta-2,4-diene are given
Explanation:
pls mark brainliest
hope this helps <3
Select the correct answer from the drop-down menu.
3. Which of the following are isometries (rigid motions)? (Choose all that apply) (2 points)
a) G (x,y) -----> (x - 2, y - 2)
b) H (x,y) -----> (-y, x)
c) H (x,y) -----> (x , 4y)
d) D (x,y) ---> (3x, 3y)
e) D (x,y) ---> (x + 42, y + 12)
Answer:
The answer is D.
Explanation:
PLEASE MARK AS BRAINLIEST!!!!!Isometries means both x and y will change with same scale factor not dissimilar factors
#1
Factor is -2
Isometries#b
No it's (-1,1)#c
No it's (1,4)#d
Factor is 3
Yes#e
No
la masa molecular de la cafeina es de 194,19g ¿cual es la formula molecular de la cafeina ?
Answer:
the formula for the molecular caffeine is C8H10N4O2
Explanation:
percent to mass, mass to mole, divide by small multiply till whole
What is the density of a 500g box whose volume is 67 ml?
Answer:
7.46 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 500 g
volume = 67 mL
We have
[tex]density = \frac{500}{67} \\ = 7.462686[/tex]
We have the final answer as
7.46 g/mLHope this helps you
name the gas produced when nitric acid is added to copper metal
Answer:
Nitrogen dioxide gas
Explanation:
Environmental factors can affect an organism's appearance, behavior, and health. For example, in certain reptiles, the temperature of the environment may determine the sex of the offspring. Both genetics and environmental factors determine the observable, physical characteristics of organisms, also called their _______________ in genetics.
a. phenotypes
b. organelle
c. morphology
d. genotype
Answer:
Phenotype
Explanation:
The observable physical characteristics of an organism, as determined by both genetic makeup and environmental influences.
The question is asking about the observable physical characteristics of organisms.
We can eliminate options B and C because they don't make much sense. An organelle is a structure in a cell which conducts cellular functions, and the morphology of an organism is basically the anatomy and physiology of the organism, which isn't quite what we're looking for.
Keeping this in mind, here is some information on prefixes:
geno - relating to genes
pheno - relating to what's observable
The second one sounds a lot like what we're looking for, and just in case, the definition of phenotype is the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
Therefore your answer is: A. phenotypes
why do you think that sodium chloride has to be heated to 800c before melting, but candle wax will start to melt at 50c?
Answer:
Sodium chloride is an ionic compound which makes it stronger and have a higher melting and boiling point. Candle wax is a covalent compound so it has a low melting point.
Explanation:
PLEASE MARK AS BRAINLIEST!!!!!what is the maximum receiving temperature for tcs in degrees fahrenheit
Explanation:
135F is the temperature
The maximum temperature that a TCS dishes can hold is 135° C and 275 Fahrenheit.
What is TCS dishes?Time/temperature control safety is a measurement of the temperature hold capacity of certain food, such as meat, fish, dairy, cream and custard products.
Thus, the maximum temperature that a TCS dishes can hold is 135° C and 275 Fahrenheit.
Learn more about TCS dishes
https://brainly.com/question/10465534
#SPJ2
Someone pls help me I will make you brain
Answer:
111
16464616944664kxkxlndkkndndnfnnfnfnnfnf20
. If the number of neutrons in the nucleus of the atom is 30, and the atomic number is 40, what is the mass number of that atom?
Answer:
70
Explanation:
The atomic number stands for the number of protons.
mass number stands for number of neutrons and protons.
30 neutrons + 40 protons = mass number of 70
Hope this helps!