Answer:
h2o,H,O are some of the elements
How does the urinary system maintain homeostasis?
Answer:
here is ur ans Lilly
Explanation:
In addition to maintaining fluid homeostasis in the body, the urinary system controls red blood cell production by secreting the hormone erythropoietin. The urinary system also plays a role in maintaining normal blood pressure by secreting the enzyme renin.hope it's helpful for you mark brainlest where you from , age
If 33.0 grams of hydrogen gas react with 300. grams of oxygen gas, what is the percent yield if an experiment produces 250. grams of water? Use the balanced equation from question 3.
Answer:
can you show us question 3 pls
Explanation:
What type of reaction is Fe+H2O=Fe3O4+H2
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:)))
1. In which substance does bromine have an oxidation number of +3?
Answer:
The bromine atom in bromine fluoride, or BrF, has an oxidation number of +1. In bromine dioxide, or BrO2, it has an oxidation number of +4. This is because fluorine usually has an oxidation number of -1, and oxygen usually has an oxidation number of -2.
Explanation:
I got this from online so...
12.7 grams of magnesium chloride is dissolved into water in a flask and set aside for an experiment. The scientist forgets about the solution and the sunlight evaporates it. She needs at least 11 grams of magnesium chloride to continue the experiment. Will she be able to recover enough magnesium chloride from the original flask to continue the experiment
Answer:
Yes, she will be able to recover enough magnesium chloride from the original flask to continue the experiment
Explanation:
The solution prepared by the scientist contains 12.7g of magnesium chloride. The sunlight will evaporate only the water present. When the volume decreases, the magnesium chloride precipitates. When all water evaporates, all the solute, magnesium chloride precipitates totally.
That means she will recover the 12.7g of magnesium chloride.
Answer: Yes, she will be able to recover 12.7g in the flask
Explanation: Founders Educere answer
1.___The enthalpy of the reactants of the reaction is about:
2.___The enthalpy of the products of the reaction is about:
3.___The activation energy of the reaction is about:
4.___The heat of reaction (ΔH) of the reaction is about:
5.___The forward reaction is:
6.___Addition of a catalyst would lower the:
7.___The enthalpy of the reactants is _______than the enthalpy of the products
a. greater
b. kinetic energy
c. 200 kJ
d. 120 kJ
e. exothermic
f. endothermic.
g. 80 kJ
h. 160 kJ
I. enthalpy
j. activation energy
k. less
Answer:
1.c 2.j 3.h 4.a 5.d 6. b 7.k 8.e
Explanation:
how do you solve a stoichiometry?
Answer:
Explanation:
Although stochiometry is very scary loking math it is very easy and and fun to learn.
First Balance the chemical equation (Meaning there are equal amounts of elements at end and begining
Second Convert your units to mols
mols are what allows for stochiometry math to work to know how to find the mols takes practice and knowing when to write the math.
Then from there is just knowing how to go from grams to kg or g to mg and etc
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?
Answer: 351
Explanation: From °C to kelvin we do
K=273+°C
From Kelvin to °C we do
°C=K-273 or -273+ K
Calcium carbonate is what kind of compound?
Answer:
Chemical Compound
Explanation:
I'm not sure why but I know it's chemical. Hope this helps!
Determine the freezing point and boiling point of a solution that has 68.4 g of sucrose
(C12H22011) dissolved in 100.g of water?
Answer:
Freezing T° of solution = - 3.72°C
Boiling T° of solution = 101.02°C
Explanation:
To solve this we apply colligative properties. Firstly, freezing point depression:
ΔT = Kf . m . i
ΔT = Freezing T° of pure solvent - Freezing T° of solution
Kf = Cryoscopic constant, for water is 1.86 °C/m
m = molality (moles of solute in 1kg of solvent)
i = Ions dissolved in solution
Our solute is sucrose, an organic compound so no ions are defined. i = 1.
Let's determine the moles: 68.4 g . 1mol/ 342g = 0.2 moles
molality = 0.2 mol / 0.1kg of water = 2 m
We replace data: ΔT = 1.86°C/m . 2m . 1
Freezing T° of solution = - 3.72°C
Now, we apply elevation of boiling point: ΔT = Kb . m . i
ΔT = Boiling T° of solution - Boiling T° of pure solvent
Kf = Ebulloscopic constant, for water is 0.512 °C/m
We replace:
Boiling T° of solution - Boiling T° of pure solvent = 0.512 °C/m . 2 . 1
Boiling T° of solution = 0.512 °C/m . 2 . 1 + 100°C → 101.02°C
What is 0.151 g in scientific notation
Answer: Scientific notation- [tex]1.51 x 10^{-1}[/tex]
Explanation: I got this by moving the decimal, so that there is one non-zero digit to the left of that decimal point. Tip- The number of decimal places you move will be the exponent on the 10.
Moved right- Negative
Moved left- Positive
What element was oxidized and reduced in this reaction and what is the oxidizing and the reducing agent for this reaction? Au(NO3)3 + Cu ——> Cu(NO3)2 + Au
Answer: Cu is oxidized while Au is reduced. The oxidizing agent is Au while the reducing agent is Cu
Answer:
Both blanks are "Ag"
(:
Explanation:
Use the following information to answer the next question
The oil that Syncrude mines from the Athabasca Tar Sands contains large amounts
of undesirable sulfur. To remove most of the sulfur, Syncrude uses a chemical
process known as the Claus process, which results in a low-sulfur "sweet crude oil.
Two steps involved in Claus process are shown below.
Step! H2S(g) + 02(9) - S02(g) + H2O(g) AH = - 518 kJ
Step || SO2(g) + 2 H2S(g) - 3 S(I) + 2 H2O(g) AH = -93 kJ
Syncrude solidifies and stores approximately 1.36 Gg of sulfur per day.
and the enthalpy for the
11. The net equation for the Claus process is
net reaction is -
kJ.
The statement above is best completed by the answers in row:
Row
i
ii
2 H2S(g) + O2(g) - 2 S(0) + 2 H2O(g)
611 kJ
3 H2S(g) + O2(9) – 3 S(0) + 3 H2O(9)
611 kJ
2 H2S(9) + O2(g) - 2 S(I) + 2 H2O(9)
425 kJ
3 H2S(g) + 302(9) - 3 S() + 3 H20(9)
425 kJ
Answer:
Tho oil that Syncrude mines from the Athabasca Tar Sands contains large amounts of undesirable sulfur. To remove most of the sulfur, Syncrude uses a chemcial process known as the Claus process, which results in a low-sulfur “sweet” crude oil.
Explanation:i found this online hope it helps
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
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.)
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?
True or False: invasive species are native species that do no cause economic or environmental harm to the ecosystem.
Answer:
False
Explanation:
They do cause harm.
-Identify the following whether it is Physical or Chemical change.
1. freezing
6. burning of paper
2. burning wood
7. digestion of food
3. melted ice cream
8. evaporation
4. boiling water
9. sublimation
5. condensation
10. Exploding firecrackers
My answers are by the way they are written p-phy c-che
pcccpppppchow many grams of C are in 500g or NaHCO3
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
name an appropriate drying agent for hydrogen gas
Answer:
Sjjejwhsshw
Explanation:
Sssskeo1jshi1bdi kwn ieni, nei, nei nei nei neox3nixnec
What observation is made when magnesium powder and lead(ii) are heated together
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
What is the name of this molecule?
O A. Butane
O B. Propane
O C. Propene
O D. Butene
The molecule represented below is Butane.
Important things to know about Butane Butane is an organic compound consisting of 4 carbon atoms. it is also a straight chain alkane with unsaturated bonds.its molecular formulae is C4H10.Can be used as a refrigerant.looking at the structure give each point represents a carbon atom, placing a C on each point gives you a total of 4, making it to be butane.See picture attached for a vivid illustration of butane.
Lear more about butabe here :https://brainly.com/question/1537939
Answer:
Butane
Explanation:
i just took tha test
Explain how you can determine if an object is accelerating. Give two examples
Answer:Acceleration has to do with changing how fast an object is moving If an object is not changing its velocity, then the object is not accelerating. Anytime an object's velocity is changing, the object is said to be accelerating it has an acceleration.
Explanation:
Which best describes the velocity of a person on a merry-go-round? * 1 point zero constant increasing continuously changing
Answer:
continuously changing
Explanation:
The velocity of a person on a merry-go-round can best be described as continuously changing. This is because the initial velocity before the ride starts would be 0. Once the ride begins, it keeps going faster and faster until it reaches a certain speed. During this time the velocity is increasing. Then it remains constant for a certain period of time and when the ride is over the velocity and speed begins to decrease until ultimately reaching a speed of 0. Therefore, it is continuously changing throughout the duration of the ride.
HELP!!!
Help,help,help,help,help, Help,help,help,help,help, Help,help,help,help,help, Help,help,help,help,help, Help,help,help,help,help, Help,help,help,help,help…
Answer:
no
Explanation:
Learning Task 3: Why can a car run faster on a smooth
rood than on a rough roade (5points).
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!
Which of the following is always equal to the number of protons in an atom 1pc
of a given element?
Mass number
Olonic number
O Atomic number
Answer:
[tex]\huge\mathfrak\purple{answer..} \\ \\ \huge\mathfrak\green{atomic \: number} \\ \\ \huge\mathfrak\red{hope \: it \: helps...}[/tex]
What do i do if i smell gas inside of the house?
Answer:
open the windows, turn off all electronics (take out all of the plugs), then find where the gas is coming from.
Explanation:
What us the % composition of oxygen (O) in iron (III) hydroxide, Fe(OH)
3?
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) hydroxideWhat is the definition of a commission? * 4 points Earnings based on how much they sell What you are paid to work. When you are paid to work on a mission as a coworker.
Answer:
Earnings based on how much they sell
Explanation:
A sales presentation can be defined as series of talk given by a salesperson with the attempt to persuade someone or a potential customer to buy a particular product, by giving information it. Some salespersons resort to the use of dramatics so as to initiate and close the sale of a particular product by engaging in series of theatrical actions.
In sales and marketing, the term closing with respect to a sales can be defined as the process of making a business sale successful such as through the exchange of money for a particular product or goods.
For a salesperson to be able to close a sales, he or she require abilities such as courage, negotiation skills, listening ears and interpersonal skills to do so or achieve a successful sales. After a successful sales, they're entitled to a percentage of the amount made from selling a particular product or closing a deal based on what is stated in the contract. These amount of money earned with respect to each sales is generally referred to as commissions.
Commission can be defined as an amount of money earned based on how much a salesperson sell.
what are the moon phases. but be more detailed and don't put in "the phases of the moon" be more detailed.
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.