Answer:
The answer to your question is a) 51.07 g of NiBr₂ b) Nickel, 54 g
Explanation:
Data
mass of NiBr₂ = ?
mass if Ni = 67.8 g
mass of Br = 37.3 g
Balanced chemical reaction
Ni + Br₂ ⇒ NiBr₂
Process
1.- Find the atomic mass of the reactants and the molar mass of the product
Ni = 59 g
Br = 79.9 x 2 = 159.8 g
NiBr₂ = 59 + 159.8 = 218.8 g
2.- Find the limiting reactant
theoretical yield Ni/Br₂ = 59/159.8 = 0.369
experimental yield Ni/Br₂ = 67.8/37.3 = 1.81
The limiting reactant is Bromine because the experimental yield was lower than the theoretical yield.
3.- Calculate the mass of NiBr₂
159.8 g of Br₂ --------------- 218.8 g of NiBr₂
37.3 g of Br₂ -------------- x
x = (37.3 x 218.8) / 159.8
x = 8161.24/159.8
x = 51.07 g of NiBr₂
4.- Find the excess reactant
The excess reactant is Nickel
59 g of Ni ---------------- 159.8 g of Br₂
x ---------------- 37.3 g of Br₂
x = (37.3 x 59)/159.8
x = 2200.7/159.8
x = 13.77 g of Ni
Excess Ni = 67.8 - 13.77
= 54 g
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Refer to the following balanced equation in which ammonia reacts with nitrogen monoxide to produce nitrogen and water.
4NH3(g) + 6NO(g) -> 5N2(g) + 6H2O(l)
How many moles of NH3 are necessary to produce 0.824 mol N2?
___mol NH3
(Note the question must be answered with three significant figures)
Answer: 0.659 mol
Explanation:
From the equation, we can tell that for every 4 moles of ammonia consumed, 5 moles of nitrogen are produced.
This means the answer is 0.824(4/5)=0.659 mol
Describe how a compound different from the elements that make it up?
NEED HELP ASAP WILL GIVE BRAINLLEST
Answer: The difference between an element and a compound is that an element is a pure substance that is made of only one element, but a compound is 2 or more elements together
Explanation:
If you were a biochemical engineer, what would you want to research?
There are seventeen key nutrients essential for bone health. The ideal intake of calcium is approximately 1.75 g per day. How many atoms of calcium is this?
Answer:
2.63×10²² atoms
Explanation:
From the question given above, the following data were obtained:
Mass of calcium (Ca) = 1.75 g
Number of atoms of calcium (Ca) =?
From Avogadro's hypothesis,
1 mole of Ca = 6.02×10²³ atoms
Recall:
1 mole of Ca = 40 g
Thus,
40 g of Ca = 6.02×10²³ atoms
Finally, we shall determine the number atoms in 1.75 g of calcium. This can be obtained as follow:
From Avogadro's hypothesis,
40 g of Ca = 6.02×10²³ atoms
Therefore,
1.75 g of Ca = 1.75 × 6.02×10²³ / 40
1.75 g of Ca = 2.63×10²² atoms
Thus, 1.75 g of Ca contains 2.63×10²² atoms.
pls help me I have only 2 minutes left person gets brainly
Where in the atom are the electrons that are used to form bonds located
Answer:
The outer shell or Valence shell
Explanation
'nuff said
The male parent's alleles are written on the _____________ of a Punnett Square. *
a. bottom
b. left
c. right
d. top
Answer:
d
Explanation:
took the test 2021
What is the pH of a 7.5 x 10-3 M
OH solution?
14 + log(7.5 × 10⁻³) ≈
11.875
Answer:
11.875
Explanation:
How many molecules are in 1.56 moles of NaCl?
Answer:
9.39432 x10^23
Explanation:
no of particles = moles * avogradros no
=> 1.56 * 6.022 x10^23
= 9.39432 x10^23
What atomic species are present in all hydrocarbons?
Answer:
Hydrogen
Carbon (iv) oxide
Adding the reactants together is known as * (1 point) - Product - Compound - Precipitate - Reaction mixture Answer please. I really need it.
Answer:
Reaction Mixture
Explanation:
Using process of elimination;
Product
This is the substance formed as a result of a chemical reaction. Incorrect option
Compound
A substance formed when tow or more elements are chemically bonded together. Incorrect option.
Precipitate
Name given to an insoluble solid formed during a reaction. Incorrect option.
Reaction Mixture
Process of combing two or more substances to form a reaction. Correct option.
Santos and Lüderitz are the same distance from the equator, and both cities are near the ocean. The air temperature in Lüderitz is colder than the air temperature in Santos. What causes the air temperature in these places to be different? Explain what causes the difference as completely as you can.
Please help i need answers A.S.A.P
Answer:
pies
Explanation:
i am confused and cant find a explanation i am sad
Santos and Luderitz have a difference in the temperature despite being at the same distance from the equator because of the oceanic currents, and the topographical factors.
What are oceanic currents?Oceanic currents are the directional movement of the oceanic and the seawater by the Coriolis Effect, density, sea level, and gravity, these movements affect the temperature of the area.
The sea level and the oceanic currents play a role in determining the temperature of the region as it affects the humidity, warm and cold wind, and environmental and other topographical factors.
Therefore, the difference in oceanic currents results in different temperatures.
Learn more about oceanic currents here:
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help :) plz :) ........
Answer:
D. 4:3
Explanation:
The mole ratio is simply the coefficients in a balanced chemical reaction and their relation to each other. For example, the mole ratio between Al and [tex]Al_{2}O_{3}[/tex] is 2:1, and the ratio between [tex]O_{2}[/tex] and [tex]Al_{2}O_{3}[/tex] is 3:2.
How many moles are in 6.7 grams of sodium hydroxide?
How many grams are in 2.5 moles of calcium carbonate?
Answer:
see explanation
Explanation:
grams => moles => divide by formula weight
moles => grams => multiply by formula weight
a. 6.7 grams NaOH = 6.7g/40g/mol = 0.17 mole
b. 2.5 moles CaCO₃ = 2.5 moles x 100g/mol = 250 grams
While dinner was cooking, Rachel noticed that there was steam coming from a pot of boiling water. Which of the following statements best explains why there is steam coming from the pot?
There is a chemical change as the water is reacting with the pot to make steam.
There is a chemical change as the water is evaporating, producing a gas.
There is a physical change as a water is condensing, producing a gas.
There is a physical change as the water is evaporating, producing a gas.
Answer:
There is a physical change as the water is evaporating, producing a gas.
What happens to a unit when you divide it by itself? (I.e. kJ/kJ)
Answer:
Your answer if I'm assuming you have the multiple choice like I did in my quiz would be : The two units cancel out.
Explanation:
The reason is Kilojoule (kJ) is equal to 1000 joules. So what you do is just divide 1,000 by 1,000. When you do that both cancel out each other because they're the same and you're left with 1.
Hope this helps that's how I figured out my answer, sorry if I'm late.
Here is a picture of my answer
Someone help pleaseeee
Answer:
The answer is B.
Explanation:
h | h
H| Hh | Hh
h| hh | hh
1- DILUTIONS What will the volume be of a solution created using 120 mL of 4.50 M stock solution if the final molarity needs to be 2.00 M? (answer in liters)
Answer: 0.27 L
Explanation:
what determines an element´s properties
Answer:
Chemical properties of each elements are determined as the elements of the electronic configuration and particularly by its outermost valence electrons in addition the total number of electron shells an atom determines to which period it belongs to .
maybe this might help u
Which of the following is the correct calculation for determining the density of an object with a mass of 54 g and a volume of 6mL
Answer:
d=m/v=9
Explanation:
How is bond polarity determined?
Answer:
Explanation:
Are you a gril or boy
Explanation:
you use it yo determine the polarity of a covalent bond using numerical means find the difference between the electron gravity of atoms ; if the result is between 0.4 and 1.7 then generally the bond is polar covalent . pls follow and mark brainliantest
the volume of gas at a stp is ..................l
Answer:
22.4 L
Explanation:
At STP, one mole of gas occupies 22.4 L of volume (molar volume). Note the International Union of Pure and Applied Chemistry (IUPAC) applies a more stringent standard of STP as a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of exactly 100,000 Pa (1 bar, 14.5 psi, 0.98692 atm).
Answer:5.3 a
letr
Explanation:
Given the equation Ca + H2O --> Ca(OH)2 + H2 how many grams of calcium will react completely with 10.0 grams of water? *
Answer: 11.0 g of calcium will react with 10.0 grams of water.
Explanation:
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
moles of [tex]H_2O[/tex]
[tex]\text{Number of moles}=\frac{10.0g}{18g/mol}=0.55moles[/tex]
The balanced chemical equation is:
[tex]Ca+2H_2O\rightarrow Ca(OH)_2+H_2[/tex]
According to stoichiometry :
2 moles of [tex]H_2O[/tex] require = 1 mole of [tex]Ca[/tex]
Thus 0.55 moles of [tex]H_2O[/tex] require=[tex]\frac{1}{2}\times 0.55=0.275moles[/tex] of [tex]Ca[/tex]
Mass of [tex]Ca=moles\times {\text {Molar mass}}=0.275moles\times 40g/mol=11g[/tex]
Thus 11.0 g of calcium will react with 10.0 grams of water.
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Photosynthesis is a process that converts energy from the sun into a form of energy that plants store as glucose. Animals consume plants and use that energy to live and survive on their own. Choose the sequence that best describes the path energy takes as it flows from the sun to animals.
A. Mechanical energy - chemical energy - radiant energy
B. chemical energy - mechanical energy - radiant energy
C. radiant energy - chemical energy - mechanical energy
D. radiant energy - mechanical energy - chemical energy
Hey I'm Chloe can you Help me, Thank you :)
How does photosynthesis use solar energy?
Answer:
Photosynthesis in plants converts solar energy into chemical energy using electrons and protons from water.
Explanation:
How much chalcopyrite had be mined to produce 100 pennies if each reaction involving copper proceeded in 69.00 % yield?
2636.06 g
Explanation:
For this question, there are three chemical equations, these balnced chemical equation are given below:
Reaction 1 => 2 CuFeS₂ + 30₂ -------------------------------------> 2CuS + 2Fe0 + 2S0₂
Reaction 2 => 2 CuS -------------------------------------------------------> Cu₂S + S
Reaction 3 => Cu₂S + S + 2O₂ --------------------> 2Cu + 2SO₂
It is given from the question above that each reaction involving copper proceeded in 69.00 % yield = 0.69.
The number of moles Cu₂S = 2.36/0.69 = 3.42 mol.
The number of moles of CuS from Cu₂S [from the second reaction] = 2 × 3.42 = 6.84 mol.
For the 3rd reaction and the 2nd reaction , the yield = 0.69.
The required number of moles of CuS = 6.84/ 0.69 = 9.91 mol.
The number of moles of CuFeS₂ = 9.91 /0.69 = 14.36 mol.
The amount of chalcopyrite had be mined to produce 100 pennies = 14.36 × 183.54 = 2636.06 g
The apparent deflection of a freely moving object like water or air because of Earth’s rotation is called...
The Cause and Effect
The Coriolis Effect
The Butterfly Effect
The Greenhouse Effect
protons and neutrons are found group together in the
a) electron cloud
b) charge
c) periodic table
d) nucleus
Answer:D
Explanation:
aerobic cellular respiration requires an adequate supply of
Answer:
oxygen ?
Explanation:
not sure but I think so
Aerobic cellular respiration requires an adequate supply of oxygen. In the presence of oxygen, the cell completely oxidised the glucose molecule to form ATP.
What is cellular respiration?In cellular respiration, the cell takes glucose and breaks it down to form energy. Cellular respiration is of two types: aerobic respiration and anaerobic respiration.
In aerobic respiration, the cell requires oxygen. Due to the presence of oxygen, the complete oxidation of glucose takes place. Glucose is converted into pyruvic acid and then enters the Krebs cycle and the electron transport chain to make ATP.
In the aerobic cellular respiration process, the maximum amount of ATP is derived. In anaerobic respiration, the cell performs respiration without the presence of oxygen. An example is glycolysis.
In this glycolysis process, the complete oxidation of glucose does not take place. In the absence of oxygen from pyruvate, lactic acid and ethanol are produced. This is called fermentation.
Hence, for aerobic cellular respiration, oxygen is required.
To learn more about cellular expression, refer to the following link:
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Heating water so that it boils is an example of _____.
Answer:
Exothermic change
Explanation:
Hope this helps and sorry if it isnt the answer you were looking for.