Answer:
The mass number
Explanation:
The mass number of an atom is its total number of protons and neutrons.
I hope this helps a bit.
Solid silicon and solid magnesium chloride form wen silicon tetrachloride gas reacts with magnesium meta. Write a word equation and an unbalanced formula equation including physical changes
Answer: Silicon tetrachloride (g) + Mg (s) [tex]\rightarrow[/tex] Silicon (s) + Magnesium chloride (s)
[tex]SiCl_4(g)+Mg(s)\rightarrow Si(s)+MgCl_2(s)[/tex]
Explanation:
The word equation for Solid silicon and solid magnesium chloride form wen silicon tetrachloride gas reacts with magnesium metal :
Silicon tetrachloride (g) + Mg (s) [tex]\rightarrow[/tex] Silicon (s) + Magnesium chloride (s)
The skeletal equation where law of conservation of mass is not followed will be:
[tex]SiCl_4(g)+Mg(s)\rightarrow Si(s)+MgCl_2(s)[/tex]
How many grams are there in 7.50 x 1023 atoms of S
Explanation:
No of moles=7.50×10²³/6.023×10²³=1.245 moles
Grams=1.245×32=39.84grams
Give me lil reasoning so I know your not lying for points
:(
(I’ll mark you as brainlister )
Answer:
0.01 psi
Explanation:
If you look at the data points plotted on the graph, the slope of the line touches 0.1 for the y-axis when it is at 20 for the x-axis.
In dry climates, people often dig wells to find additional sources of water
to raise crops or feed livestock. Which of the following could be
significant negative effect on the environment cause by obtaining water
from the well?
Select one:
A: The digging will create air pockets in the soil.
B: Using the well could erode the soil and increased the risk for mountain
landslides.
C: Crushed rock and layers of soil might pile up where the well is dug
D: Using the well could lower the water table throughout the area.
Answer:
D i think, sorry if its wrong
Explanation:
Answer:
Using the well could lower the water table throughout the area.
Explanation:
i just took a test and this was the answer
Difference between modern periodic table and medeelves periodic table
Answer:
The main difference between Mendeleev and Modern Periodic Table is that Mendeleev’s periodic table orders the elements based on their atomic mass whereas Modern periodic table orders the elements based on their atomic number.
Explanation:
Oo help it’s for a grade
Answer: D.kinectic energy
Explanation
Equimolar solutions of the following were prepared in water separately. Which one of the solution will record the highest pH?
o CaCl2
SrCl 2
Ba(NO 2 )2
MgCl2
Answer:
Ba(NO2)2
Explanation:
Anything that contains calcium comes from a strong acid. Nitrous oxide (NO2) is a weak acid, therefore the salt it makes is less acidic than the rest --> the highest pH :)
Can someone plzzzzz helppppp me plzzzzzz( and don’t tell me to click a link it doesn’t work)
Answer: First Scientific method
Second: question
Third: research
Fourth: hypothesis
Fifth: experiment
Sixth: procedure
Seventh: variable
Eighth: observe
Ninth: interpret
Tenth: record
Eleventh: ethical
Twelfth: conclusion
Explanation: That is the order that the words in the box go in. Hope this helps!
In a healthy pond, the temperature is 16°C (61°F). What is the most likely pH of this pond?
A. 6.3
B. 5.3
C. 5.0
D. 4.0
Answer:
A . 6.3 In a healthy pond, the temperature is 16°C (61°F). What is the most likely pH of this pond
In a healthy pond, the temperature is 16°C (61°F). 6.3 is the most likely pH of this pond.
What do you mean by pH ?A measure of the acidity or basicity of a substance or solution. The pH scale ranges from 0 to 14. A pH value of 7 is neutral on this scale, indicating that it is neither acidic nor basic.
A pH value less than 7 indicates that it is more acidic, while a pH value greater than 7 indicates that it is more basic.
"Potential of Hydrogen" is the full form of pH. The negative logarithm of H+ ion concentration is known as pH. As a result, the meaning of the name pH is explained as hydrogen strength or power.
Thus, In a healthy pond, the temperature is 16°C (61°F). 6.3 is the most likely pH of this pond, so the pond is more acidic in nature.
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3. Students measured the mass of the reactants and products for a combustion reaction they observed.
When they measured the mass of the products, they discovered the products had a greater mass than
the reactants. How did this unexpected change in mass occur?
A. Stadents made a measurement error, because ending with more products is impossible.
B. The reactants had hidden materials within them that had no mass until the reaction was complete.
C. The products of reactions often have greater mass, because the law of conservation is not
applicable in all chemical reactions.
D. The reaction occurred in an open system, so during the reaction a gas interacted with the reactants.
The mass of the gas could not be measured before the reaction.
Answer:
A. Students made a measurement error, because ending with more products is impossible.
Explanation:
The law of conversation of matter tells us that in a chemical reaction, matter is never created or destroyed, it's simply converted from one form to another. So the mass of reactants should always equal the mass of the products in a chemical reaction. If there is excess mass in the product, the students have made an error of some kind.
briskly meaning
thankew 人(◕ᴗ◕✿)❤️
to all who liked my answers
plsssssssssss flw
can anyone pls flw me who aren't flwing
plsssssssssss answer fast
Answer:
You need follower?
See it shows this in Laptop
I can't see who I am following it does itself
a wave transfers from one place to another
Answer:
mhm
Explanation:
What does it mean to be limiting or excess? (Limiting Reactant)
Answer:
Find the limiting reagent by calculating and comparing the amount of product each reactant will produce. Balance the chemical equation for the chemical reaction. The reactant that produces a lesser amount of product is the limiting reagent. The reactant that produces a larger amount of product is the excess reagent.
Explanation:
what compound does hydrogen form?
Р
+
02
=
P4O6
balance the equation
To balance a chemical equation, both sides should have equal mass, or in other words both sides should have same number of atoms as to follow the conservation of mass rule.
P + O₂ = P₄O₆
LHS:
Number of Phosphorus atoms = 1 atom
Number of Oxygen atoms = 2 atoms
RHS:
Number of Phosphorous atoms = 4 atoms
Number of Oxygen atoms = 6 atoms
Also since P₄O₆ has the most number of atoms we will make the LHS equalize to P₄O₆.
Difference between Phosphorous atoms in LHS to RHS = 3
Since phosphorous is a monatomic we need 3 phosphorous atoms extra
Difference between Oxygen atoms is LHS to RHS = 4
But Oxygen is diatomic, so we need 4/2 = 2 Oxygen molecules
Now lets see if it is balanced
P + 3P + O₂ + 2O₂ -------> P₄O₆
4P + 3O₂ ------> P₄O₆
LHS:
Phosphorous atoms = 4 atoms
Oxygen atoms = 3 × 2 = 6 atoms
RHS:
Phosphorous atoms = 4 atoms
Oxygen atoms = 6 atoms
LHS = RHS
Therefore the balanced equation is 4P + 3O₂ = P₄O₆
Happy to help :)
If you need more explanation or help in any other question, feel free to ask
What type of reaction is: br2 + nal2 ---> nabr + l2
Answer: its a single replacement reaction
pleaseeeeeeeeeee someone help urgent we are writing a test tmr can some one please explain subatomic particles to me...
Answer:
n physical sciences, subatomic particles are smaller than atoms. They can be composite particles, such as the neutron and proton; or elementary particles, which according to the standard model are not made of other particles. Particle physics and nuclear physics study these particles and how they interact.
Explanation:
a particle smaller than an atom (e.g., a neutron) or a cluster of such particles (e.g., an alpha particle).
Whats the formula for Nickel (IV) chloride?
The molecular formula for Nickel (IV) Chloride will be NiCl₂. Nickel reacts with chloride to form a salt. The salt is yellow in color and anhydrous.
What is molecular formula?A molecular formula is a way of presentation of chemical formula of a compound. It gives the information related to the type of atoms, number of atoms which constitutes the compound and the chemical properties.
Molecular formula of a chemical compound can be derived by the valency of element. In this question, molecular formula of the compound can be derived by:
Valency of Nickel = 2
Valency of Chlorine = 1
By the cross-multiplication of valency:
element 1(valency of element 2). element 2 (valency of element 1)
= Ni (1). Cl(2)
= NiCl₂
Therefore, the molecular formula of Nickel (IV) chloride will be NiCl₂.
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How does the human body build the complex
molecules it needs?
Dehydration synthesis reactions build molecules up and generally require energy, while hydrolysis reactions break molecules down and generally release energy. Carbohydrates, proteins, and nucleic acids are built up and broken down via these types of reactions, although the monomers involved are different in each case
Answer:
Dehydration synthesis reactions build molecules up and generally require energy, while hydrolysis reactions break molecules down and generally release energy. Carbohydrates, proteins, and nucleic acids are built up and broken down via these types of reactions, although the monomers involved are different in each case.
Explanation:
Give the electronic configuration of an atom of sulfur.
Answer:
1s² 2s² 2p⁶ 3s² 3p⁴
Explanation:
Looking at the periodic table, we see that sulfur (S) has an atomic number of 16, this means its electronic configuration would be:
1s² 2s² 2p⁶ 3s² 3p⁴We know the electronic configuration written above is correct because the sum of all the superscript numbers is 16 (2+2+6+3+4=16).
what evidence is there in the diagrams to support the classification of these substances as elements
Awnser your loooking fo its got to be aluminium
Explanation:i took the dang subgect
7) Which of the following has the most nonpolar bond?
A. HAS
B. HCl
C. Brz
D. OF2
Calcium and sulfur Enter the ions formed by these elements and separate your answers with a comma (e.G., Sr2+,As3−).
Answer:
Ca²⁺, S⁻²
Explanation:
Calcium (Ca) is a metallic element and belongs to group II of the Periodic Table. So, it can lose 2 electrons to form the positively charged ion Ca²⁺.
Sulfur (S) is a non-metal element, so it has the tendency to gain electrons and to form anions. It accepts two electrons to form the sulfide ion S²⁻.
if common names does not exist how would be the world of organic compounds
Explanation:
I think the question is not complete
Identify the type of wave that would be located at Point A below.
Help please!! In this question x represents which element?
31
15 x
A. 31 gallium Ga
B. 15 phosphorus P
C. 46 palladium Pd
Answer: think It is A. 31 gallium Ga or C. 46 palladium Pd
in the rainforest, plants that live on the forest floor have different adoptions from plants that live high up in the canopy. what is the main reason that leaves of plants on the rain forest floor are much wider than those found higher in the canopy of the rain forest?
1: these plants produce poisons that plants in other area do not.
2: these plants have less access to light then plants in other areas.
3: These plants need to take in more water than plants in other areas.
4: these plants have more natural predators then plants in other areas.
Answer:
option 3, the leaves higher up need less water since there getting more light and the ones lower need to adapt to gaining more water since they won't be seeing much light
1 In what type orbital are the outer electrons of the atoms of the elements of Group 1 (IA) and Group 2 (IIA)?
Answer:
s orbital
Explanation:
The elements of Group 1 (IA) and Group 2 (IIA) have one and two electrons in their outermost shells respectively.
For the elements in group Group 1 (IA), the general outer electron configuration is ns1. This last electron is accommodated within an s orbital.
For the elements in Group 2 (IIA), the two outermost electrons are accommodated in an ns orbital, hence the answer.
Indica en cuál de estos movimientos existe aceleración: Una bicicleta baja por una pendiente y se accionan los frenos. Un caballo galopa durante 2 min a 30 km/h. Una atleta corre desde la línea de salida y se detiene al llegar a la meta
Answer:
1. Hay aceleración.
2. No hay aceleración.
3. Hay aceleración
Explanation:
Para responder esta pregunta hay que tener en cuenta que existe aceleración cuando hay una variación en la velocidad:
"Una bicicleta baja por una pendiente y se accionan los frenos." Al activarse los frenos la velocidad de la bicicleta, disminuyendo. Hay aceleración."Un caballo galopa durante 2 min a 30 km/h." La velocidad del caballo de cambia, por lo que no hay aceleración."Una atleta corre desde la línea de salida y se detiene al llegar a la meta" La velocidad del atleta cambia al iniciar a correr, al igual que al detenerse. Hay aceleración.Which of the following is an example of kinetic energy?
Answer: A river flowing at a certain speed
Explanation: as water has certain velocity and mass.