Answer:
Mass = 11.16 g
Explanation:
Given data:
Mass of hydrogen = 8 g
Mass of oxygen = 10 g
Mass of water produced = ?
Solution:
Chemical equation:
2H₂ + O₂ → 2H₂O
Number of moles of hydrogen:
Number of moles = mass / molar mass
Number of moles = 8 g/ 2 g/mol
Number of moles = 4 mol
Number of moles of oxygen:
Number of moles = mass / molar mass
Number of moles = 10 g/ 32 g/mol
Number of moles = 0.31 mol
now we will compare the moles of hydrogen and oxygen with water.
O₂ : H₂O
1 : 2
0.31 : 2/1×0.31 = 0.62
H₂ : H₂O
2 : 2
4 : 4
Number of moles of water formed by oxygen are less this it will act as limiting reactant.
Mass of water:
Mass = number of moles × molar mass
Mass = 0.62 mol × 18 g/mol
Mass = 11.16 g
Which phrase describes gravitational attraction?
how heavy an object feels
the amount of matter in an object
how objects respond to changes in mass
the pull between objects with mass
The phrase which best describes gravitational attraction is the pull
between objects with mass.
What is Gravitational attraction?Gravitational attraction is the attraction which occurs between two objects
with mass. The force of attraction has a magnitude which is directly
proportional to the masses of the two objects and inversely proportional to
the square of the distance between the two objects.
This is the reason why option D i9s the most appropriate option as it deals
with pull or attraction.
Read more about Gravitational attraction here https://brainly.com/question/15090289
Which of the following is an example of how the need to maintain
homeostasis can cause an organism to change its behavior?
please answer quickly!!!!
(examples in the photo)
Answer:
C. A human shivers when exposed to cold weather.
Explanation:
Homeostasis simply refers to balance, which is desirable in the context of an organism. In this problem, the only one that demonstrates this is a human shivers when exposed to cold weather. By using kinetic energy, heat is generated, maintaining a balance, so to speak.
(btw you may find it more helpful to post these types of problems under biology in the future.)
why we add PH10 When we determine the zn ion
Answer:
to make it basic from acidic
SOMEONE HELP WITH THE LAST QUESTION QUESTION 2) HURRY IM IN ZOOM<3
The value of x = 97
The unknown angles : 97°,97°, 107° and 59°
Further explanationOne variable linear equation is an equation that has a variable and the exponent number is one.
Can be stated in the form:
[tex]\large{\boxed{\bold{ax=b}}[/tex]
or
ax + b = c, where a, b, and c are constants, x is a variable
The parallelogram has total angle of 360°.
The value of each of the 4 angles of the parallelogram :
1. x°
2. x°
3. x+10°
4. 59°
The sum of the four angles of this parallelogram is :
[tex]\tt x+x+x+10+59=360[/tex]
So that the mathematical equation becomes (by combining the like terms) :
[tex]\tt 3x+69=360\\\\3x=291\\\\x=97[/tex]
So the value of the four angles (by entering the x value)
1. 97°
2. 97°
3. x+10=97+10=107°
4. 59°
The diameter of a helium atom is about 1 3 102 pm. Suppose that we could line up helium atoms side by side in contact with one another. Approximately how many atoms would it take to make the distance from end to end 1 cm
Answer:
1 × 10⁸ He atoms
Explanation:
Step 1: Given data
Diameter of a helium atom (d): 1 × 10² pmTotal distance to be covered (D): 1 cmStep 2: Convert "d" to meters
We will use the conversion factor 1 m = 10¹² pm.
1 × 10² pm × (1 m / 10¹² pm) = 1 × 10⁻¹⁰ m
Step 3: Convert "D" to meters
We will use the conversion factor 1 m = 100 cm.
1 cm × (1 m / 100 cm) = 0.01 m
Step 4: Calculate the number of atoms of He required
We will use the following expression.
D/d = 0.01 m / 1 × 10⁻¹⁰ m = 1 × 10⁸
In solid methane, the forces between neighboring CHA molecules are best characterized as
sorry I didn't understand the question ask you to do
The electricity accounts of residents in a very small town are calculated as follows: v If 250 units or fewer are used, the cost is 2 cents per unit; v If more than 250 but not more than 800 units are used, the cost is $10 for the first 250 units and 5 cents for every unit in the excess of 250. v If more than 800 units are used, the cost is $35 for the first 800 units plus 10 cents for every unit in the excess of 800. v A basic service fee of $5 is charged, no matter how much electricity is used. Write a user-defined function program to calculate the fees of any electricity unit, and then write a command to calculate the fee of a resident who used 700 electricity units.
Answer:
For you first question about the defined function program:
if ( v ≤ 250 ) {
set p to (5 + v*.02)
}
elseif ( 250 ≤ v ≤ 800 ) {
set p to (5 + 2500 + (v - 250)*.02)
}
else {
set p to (5 + 28000 + (v - 800)*.1)
}
This function will first check if the user has used how many units and decide which category that user falls into.
Then, it uses that information to execute a command to calculate how much money that user should pay for the electricity bill, factoring in the extra demands from the question.
For your second question:
(5 + 2500 + (700 - 250)*.02)
= (3000 + 450*.02)
= (3000 + 9)
= 3009
The customer should have paid 3009 dollars.
Explanation:
Hope this helped!
Cl2 + H2 + 2HCI
In the reaction above, the coefficient of Cl2 is
blank The subscript of Cl2 is blank
Answer:
1 and 2
Explanation:
The given equation is:
Cl₂ + H₂ → 2HCl
A coefficient is the variable or number before a chemical specie.
In this reaction Cl₂ and H₂ are the reactants;
The coefficient of Cl₂ is 1,
H₂ is 1,
HCl is 2
The subscript is the number to the lower power after a chemical specie is denoted.
For Cl₂, it is 2
A number before a chemical atom or molecule is called a coefficient. The coefficient of chlorine is one (1), and its subscript is two (2).
What subscript?A subscript is a number or symbol written at the bottom right of the chemical atom or the molecule in a compound.
The balanced chemical reaction is shown as:
[tex]\rm Cl_{2} + H_{2} \rightarrow 2HCl[/tex]
The coefficient in chlorine is 1, hydrogen is 1, and hydrochloric acid is 2. The subscript in chlorine gas is 2, and hydrogen gas is 2.
Therefore, the coefficient is 1, and the subscript is 2.
Learn more about coefficient here:
https://brainly.com/question/3985848
Draw a simple transverse wave and label the wavelength.draw it on a piece of paper
Answer:
I need this too but nobody knows how :(
Explanation:
These traits describe either a chemical or a nuclear reaction. Which statements describe a nuclear
reaction? Check all that apply.
involves the loss, gain, or sharing of electrons
may involve a change in total mass
involve relatively low energy changes
occur outside the nucleus
involve very high-energy changes
o involve changes in nuclides when decay occurs
Answer:
may involve a change in total mass
involve very high-energy changes
involve changes in nuclides when decay occurs
Explanation:
A nuclear reaction is different from a typical chemical reaction. The reaction occurs within the nucleus and involved nuclear materials.
Most nuclear reactions involves a change in mass due to the attenuation of the nuclear materials. Mass is converted to energy in nuclear reactions. Nuclear reactions are usually very high energy processes and they release a significant amount of energy. The nuclide changes as new atoms are formed by the process.Need help on chemistry
Answer:
B
Explanation:
Protons are located in the nucleus, which takes out c
Electrons are in specific shells, so b is the answer
what deos sedimentation mean
Answer:
This is the tendency for particles in suspension to settle out of fluid in which they are contained and come to rest against a barrier.
Explanation:
In sedimentation, the particles are in a fluid and under the influence of forces , for example, gravitational forces, they settle and then come to rest when faced with a barrier.
The settling process is the process in which the particles fall out of liquid and sedimentation is the end of the process.
What is the group number of the most nonmetallic group that contains metalloids?
_______________
What is the group number of the most metallic group that contains metalloids?
_______________
Answer:alkali metals group 1
Explanation:practice and get better
Reactivity occurs when a substance reacts with another substance, changing it into a ____?
Answer:b
Explanation:
I need help and fast plzzzzzzzzz
Answer:
A is condensation
B is Conduction
C is erosion
D is radiation
E is deposition
Explanation:
Many plants obtain glucose through the process of ___
Answer:
vb
Explanation:
b
Answer:
photosynthesis
Explanation:
write the general formula of a. alkane b. aikyl radicals radicals
Answer:
General formula of alkanes is: [tex]C_{n}H_{2n+2}[/tex]
General formula of alkyl: [tex]C_{n}H_{2n+1}[/tex]
True or fase all fossils come from dinosaurs?
Answer:
Hella false
Explanation:
big cap.
hope this helped, please make me brainliest
Which statement is correct concerning hereditary information?
A. A chromosome is composed of many genes.
B. A gene is composed of many chromosomes.
C. Each chromosome carries the same information.
D. Each gene carries the same information.
Answer:
the answer to this question is option A mark me as brainliest
mark me as brainliest
How much HCl exists in 347 mL of 0.48 M
solution of HCI?
Answer in units of mol.
Answer:
Number of moles of HCl = 0.17 mol
Explanation:
Given data:
Volume of solution = 347 mL
Molarity of solution = 0.48 M
Number of moles of HCl present = ?
Solution:
Formula:
Molarity = number of moles of HCl / volume in L
Volume in L:
347 mL× 1L / 1000 mL
0.347 L
by putting values in formula:
0.48 mol/L = number of moles / 0.347 L
Number of moles = 0.48 mol/L × 0.347 L
Number of moles = 0.17 mol
The following half-reaction method is used to balance oxidation-reduction equations.
(1) Determine which atoms change oxidation state from reactant to product in the reaction.
(2) Identify and write half reactions (oxidation and reduction).
(3) Return to the original chemical equation to balance it.
(a) Insert the coefficients from the half reactions first.
(b) Inspect the number of each atom on each side for all elements.
Which important step is missing from this procedure?
Check other reactions similar to this one.
Name the elements that are involved in the reaction.
Make sure the reduction half reaction is identified first.
Balance the half reactions based on the number of electrons.
Answer:
its (D) Balance the half reactions based on the number of electrons.
Explanation:
Answer:
D ✔️
Explanation:
"Balance the half reactions based on the number of electrons."
The diagram represents a plant leaf cell and two different molecules used in the process of photosynthesis. Molecule 1 and 2 are most likely
A. Carbon dioxide and water
B. Nitrogen and water
C. carbon dioxide and nitrogen
D. Nitrogen and oxygen
which two locations have climate warmed by the gulf streams please help
Answer:
A and C
Explanation:
Hope this helps :)
Answer:
I think B and C hope this helps!
Explanation:
what's common to H20,HF and NH3
Answer:
They all contain sone hydrogen atoms.
Explanation:
H is hydrogen doi
you place your hand on the thermos what type of transfer is taking place
1.Conduction
2.Convection
3.Radiation
Answer:
conduction
Explanation:
Conduction happens when 2 objects with different temperatures come in contact with each other. The heat transfers from the hotter object to the cooler object.Apr
Answer: Conduction
Explanation: Conduction: Conduction happens when 2 objects with different temperatures come in contact with each other. The heat transfers from the hotter object to the cooler object.
A chemist determines by measurements that moles of bromine liquid participate in a chemical reaction. Calculate the mass of bromine liquid that participates. Be sure your answer has the correct number of significant digits.
Answer:
This question is incomplete as it lacks the number of moles of Bromine. The complete part is as follows: 0.0900 moles of bromine liquid participate in a chemical reaction.
The answer is 7.191g
Explanation:
The number of moles in a substance can be calculated thus;
moles = mass/molar mass
Atomic mass of Bromine = 79.9g/mol
According to the question, the chemist determines by measurements that 0.0900 moles of bromine liquid participate in a chemical reaction. To calculate the mass of bromine liquid that participates, we say;
Mass = moles × molar mass
Mass = 0.0900 × 79.9
Mass = 7.191g
Therefore, 7.191g of Bromine will participate in the chemical reaction.
How many energy Do Squrrel's have
Answer:
pfffft definitely 10. smh silly goose
"Ground squirrels eat nuts, leaves, roots, seeds, and other plants. They also catch and eat small animals, such as insects and caterpillars.Though they are terrific climbers, these squirrels do come to the ground in search of fare such as nuts, acorns, berries, and flowers. They also eat bark, eggs, or baby birds."
Look at picture and answer will mark brainliest.
Answer:
A
Explanation:
What is the chemical name of C4H10
Answer:
Butane
Explanation:
Answer:
Butane
Explanation:
Butane is a colorless gas with a faint petroleum-like odor.
Melting point: -138 °C
⦁ How many moles of carbon dioxide will be produced by the complete reaction of 2.0 mol of glucose (C6H12O6), according to the following equation?
C6H12O6 + 6O2 → 6CO2 + 6H2O
Answer:
i think 12 moles of CO2 will be produced