Answers
Answer:
A) Mg + H2SO4 → MgSO4 + H2
B) CaCO3 + 2HCl → CaCl2 + H2O + CO2
C) CaO + H2O → Ca(OH)2
D) 3Ag + 4HNO3 → 3AgNO3 + H2O + NO2
Explanation:
A) Mg + H2SO4 → MgSO4 + H2
The equation is already balanced because the number of each element in the left hand side is already equal to that in the right hand side.
B) CaCO3 + 2HCl → CaCl2 + H2O + CO2
This equation is balanced by putting 2 in front of HCl on the left hand side to balance the elements on the right hand side.
C) CaO + H2O → Ca(OH)2
Thus equation is already balanced because the number of each element in the left hand side is already equal to that in the right hand side.
D) 3Ag + 4HNO3 → 3AgNO3 + H2O + NO2
This equation is balanced by putting 3 in front of Ag and 4 in front of HNO3 on the left hand side while we put 3 in front of AgNO3 on the right side to balance the elements on the right hand side.
Related Questions
7. Buffalo were moved from Yellowstone National Park because
they carried a serious disease
they had killed other animals
they were no longer protected there
the herd had grown too large
Answers
Answer:
they had killed other animals
I believe your answer is carried a serious disease.
Explanation: Buffalo are known to carry a disease called brucellosis, which can spread to livestock a kill other animals/
Is cannabinol soluble in 1-octanol?
Why or why not?
Answers
Answer: Uhmmmm this is what i got...-
Explanation:
It is a matter of fact that the hydrophobic (water-hating) oily compounds of cannabinoids such as CBD, THC and others are not water soluble. The term "water soluble" refers to materials which dissolve in water in a homogenous manner by becoming molecules or ions (such as sugar, alcohol, and salt).
3. Why are fossils so rare?
the conditions needed to form the
fossil are rare
most organisms die when eaten by
others
all organisms form fossils when
they die, we just have not found them
yet
Answers
Answer:
fossils are rare bc most dead organisms get decayed by environmental change and decomposers,most fossils are parts of bones and mostly found indry areas like deserts
What us the % composition of oxygen (O) in iron (III) hydroxide, Fe(OH)
3?
Answers
Answer:
44.91% of Oxygen in Iron (III) hydroxide
Explanation:
To solve this question we must find the molar mass of Fe(OH)3 and the molar mass of the oxygen in this molecule. Percent composition will be:
Molar mass Oxygen / molar mass Fe(OH)3 * 100
Molar mass Fe(OH)3 and oxygen:
1Fe = 55.845g/mol*1 = 55.845
3O = 16.00g/mol*3 = 48.00 - Molar mass of Oxygen
3H = 1.008g/mol*3 = 3.024
55.845 + 48.00 + 3.024 =
106.869g/mol is molar mass of Fe(OH)3
% Composition of oxygen is:
48.00g/mol / 106.869g/mol * 100 =
44.91% of Oxygen in Iron (III) hydroxideHOW TO DO THIS QUESTION PLEASE
Answers
Answer:
solid
Explanation:
lithium is a solid so it would still be solid since it is at 100 degrees and has not yet gotten to 180 degrees which is when it melts
What observation is made when magnesium powder and lead(ii) are heated together
Answers
Answer:
in the lead strip the will be no change and no reaction. this is job salvation that is made when magnesium powder and lead to our heater together
the highest concentration of life extorts in the top 200 meters of ocean water what is the most important factor that influences this concentration of life
Answers
What type of reaction is Fe+H2O=Fe3O4+H2
Answers
Answer:
single replacement
Explanation:
it's when one element starts out by itself, then replaces another element in a compound, kicking it out
Answer: This is a chemical reaction
Explanation: Hope this helps:)))
What is a strong base
Answers
A large dam was constructed across a river to create a reservoir on one side. This led to the sinking of nearby forests, which
impacted plants and animals and caused a decrease in biodiversity, Trees were also cut down to construct the dam, which led to
increased soil erosion and reduced soil fertility.
A scientist wants to reduce the impact of the dam's construction and improve the biodiversity of the ecosystem. Which solution
should the scientist choose?
A. relocating people to live in the area around the dam
B. planting trees around the reservoir to decrease soil erosion
c. using synthetic fertilizers to improve soil fertility
OD. building a small series of dams on nearby streams
Answers
Answer:
B
Explanation:
One of the main problems is the soil erosion reducing the fertitlity of the soil, thus reducing it's chances of the soil helping plant growth, thus reducing biodiversity. The other selections worsen the problem.
Rutherford used his gold foil experiment as evidence for a new atomic model. He suggested that the atom contained a small
positively charged nulceus surrounded by a large void filled with only a few electrons orbiting the nucleus.
What other experiment or evidence assisted in the creation of this model?
A)
Electrons in orbit would be captured by a nucleus.
B)
The precise location of an electron is impossible to acertain.
o
The plum pudding model of the atom agreed with the nuclear model
D)
Thomson discovered the atom contained negatively charged electrons.
Nature of Science
SC6N22) New Evidence
ID:7495
Answers
Answer:
The plum pudding model of the atom agreed with the nuclear model
Explanation:
Answer:
D) Thomson discovered the atom contained negatively charged electrons.
Explanation:
Without previous discoveries such as the electron, Rutherford would not have generated his nuclear model. So, Thomson had to discover the atom contained negatively charged electrons first.
Hope this helps :)
1. Do you believe we can bring an end to acid rain? How so?
2. What are some examples of land pollution?
Answers
Answer:
Emissions from Electricity. ...
Vehicle Emissions. ...
Reducing Electricity Consumption. ...
Reducing On-Road Vehicle Exhaust. ...
Other Considerations.
how many grams of C are in 500g or NaHCO3
Answers
Answer: 71.43g
Explanation: The RMM of NaHCO3 is
23+1+12+16(3)=84.
There is one carbon in NaHCO3 thus there are 1×12g of C in NaHCO3.
Thus
85gNaHCO3-----12g C
500gNaHCO3---- xgram
(500×12)÷84= 71.43
Calcular las fracciones molares de los componentes de una disolución formada por: 250 g de agua, 50 g de ácido acético y 25 g de cloruro de sodio.
Answers
The question is: Calculate the molar fractions of the components of a solution made up of: 250 g of water, 50 g of acetic acid and 25 g of sodium chloride.
Answer: The mole fraction of water, acetic acid and sodium chloride is 0.916, 0.054, and 0.028.
Explanation:
As number of moles is the mass of substance divided by its molar mass.
Therefore, moles of given species are calculated as follows.
The number of moles of water (molar mass = 18 g/mol):
[tex]Moles = \frac{mass}{molar mass}\\= \frac{250 g}{18 g/mol}\\= 13.88 mol[/tex]
The number of moles of acetic acid (molar mass = 60.052 g/mol):
[tex]Moles = \frac{mass}{molar mass}\\= \frac{50 g}{60.052 g/mol}\\= 0.832 mol[/tex]
The number of moles of sodium chloride (molar mass = 58.44 g/mol):
[tex]Moles = \frac{mass}{molar mass}\\= \frac{25 g}{58.44 g/mol}\\= 0.427 mol[/tex]
Therefore, mole fraction of each component is calculated as follows.
Mole fraction of water:
[tex]Mole fraction = \frac{moles of water}{Total moles}\\= \frac{13.88}{13.88 + 0.832 + 0.427}\\= \frac{13.88}{15.139}\\= 0.916[/tex]
Mole fraction of acetic acid:
[tex]Mole fraction = \frac{moles of water}{Total moles}\\= \frac{0.832}{13.88 + 0.832 + 0.427}\\= \frac{0.832}{15.139}\\= 0.054[/tex]
Mole fraction of NaCl:
[tex]Mole fraction = \frac{moles of water}{Total moles}\\= \frac{0.427}{13.88 + 0.832 + 0.427}\\= \frac{0.427}{15.139}\\= 0.028[/tex]
Thus, we can conclude that mole fraction of water, acetic acid and sodium chloride is 0.916, 0.054, and 0.028.
How many days does it take 16.Og of Gold-198 to decay to 1.0g? (each half-
life = 2.69 days) *
O 10 days
0 2.69 days
O 10.76 days
16 days
PLZ HELP NOW
Answers
Answer:
10.8 days (3 sig.figs.)
Explanation:
All radioactive decay is 1st order decay defined by the expression A = A₀e^-kt
which is solved for time of decay (t) => t = ln(A/A₀) / -k
A = final weight = 1.0 gram
A₀ = initial weight = 16.0 grams
k = rate constant = 0.693/t(1/2) = 0.693/2.69 days = 0.258 days⁻¹
t = ln(1/16) / -0.258da⁻¹ = (-2.77/-0.258) days = 10.74646792 days (calculator)
≅ 10 days (1 sig. fig. based on given 1 gram mass)
Explain the energy flowing as you hold an ice cream cone. (Be sure to mention "the system," "the surroundings," and how energy is being transferred.)
Answers
Answer:
This is what I put, it hasn't been graded though...
Within the system, the energy is flowing from your hand to the ice cream cone. Energy is also flowing from the surroundings to the ice cream cone unless it's reeeeaally cold in the surroundings in which case why are you even holding an ice cream cone when it's that cold?
(1-6) Which of the electron movements shown below (A, B, C, or D) will emit the highest energy light?
A
B
с
D
na3
ng
n=5
n=6
ОА
OB
Ос
OD
Answers
Answer:
I would say D (not sure tho)
Explanation:
pls can someone mention 5 example of fine chemicals
Answers
Plz answer fasttt
There are several ways to model a compound. One type of model is shown.
4 C's are connected in a line by 3 black lines. The C on the left has 3 H's attached to it each by a black line. The next C has 1 H attached by a black line and 1 O attached by 2 black lines. The next C has 2 H's attached to it by 1 black line each. The last C has 2 H's attached to it by 1 black line each and 1 O attached by a single black line. That O has an H attached to it by 1 black line.
What is the chemical formula for the molecule represented by the model?
CHO
C4H9O2
C4H8O
C3H8O2
Answers
Answer:
I believe the answer would be C4H9O2.
→
1. A + 2B→→→→D
The rate of formation of D in the above reaction is found experimentally to be
independent of the concentration of B
and to quadruple when the
concentration of A is doubled.
Write the rate law for the reaction
Answers
Answer:
[A]²
Explanation:
Since the formation is independent of D, D is 0 order.
Since a quadruples when it is doubled it can be written as
2A^X= 4
To find the unknown power we can assume A= 1 to make the math simple. So When a = 2 (Because you doubled it) raised to X power it will equal 4
so the unknown power is 2
Making the rate law
[a]²[b]⁰
or simply just
[A]²
Learning Task 3: Why can a car run faster on a smooth
rood than on a rough roade (5points).
Answers
Answer:
it is easy to push a car on smooth road than on a rough road because friction is less in smooth road than on rough roads.
Answer:
Why can a car run faster on a smooth
rood than on a rough road it is because friction is less in smooth roads than in rough road....
Explanation:
hope it helps..stay safe!
How many atoms of oxygen does the chemical formula show?
Al(HSO4)3
Answers
Answer:
This formula contains 12 oxygen atoms.
According to the data, the temperature of the
substance is 28°C. If we know that 0°C = 273 K,
what is the temperature of the substance in
Kelvin?
Answers
Answer: 351
Explanation: From °C to kelvin we do
K=273+°C
From Kelvin to °C we do
°C=K-273 or -273+ K
someone help asap its due in 10 mins
Answers
Answer:
A. Species
Explanation:
The order from least to most specific is:
Kingdom
Phylum
Class
Order
Family
Genus
Species
You guys are working hard on this school work... You guys deserve to take a break, come hang out with me.
Answers
Answer:
hggggggggggggggggggggggggggggggggggggsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss
Explanation:
jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
What do i do if i smell gas inside of the house?
Answers
Answer:
open the windows, turn off all electronics (take out all of the plugs), then find where the gas is coming from.
Explanation:
Describe what and how solids look like
Answers
in a paper chromatogram why is substance impure
Answers
Answer:
Chromatography is used to see if substance is pure or to identify the subtances in a mixture. Components of a mixture are identified by the relative distance travelled compare to the distance travelled by the solventExplanation:
I hope it helps1) HA + H2O <--> H3O+ + A- ....what is HA considered?
O
Acid
Base
Conjugate Acid
Conjugate Base
Answers
what are the moon phases. but be more detailed and don't put in "the phases of the moon" be more detailed.
Answers
Explanation:
The lunar phase or Moon phase is the shape of the Moon's directly sunlit portion as viewed from Earth. The lunar phases gradually change over a synodic month as the Moon's orbital positions around Earth and Earth around the Sun shift.