Answer:
wood
Explanation:
I think
I hope it helps
Air that is less dense ______, while air that is more dense ______.
Air that is less dense Speeds up, while air that is more dense Slows Down.
(please mark brainiest I need for new rank)
Can someone please help I need help?!?!
Answer:
a: 6 moles
b: 6.75 moles
c: 5 grams
Explanation:
a: mole ratio 2:3
b: mole ratio 2:3
c: mole ratio 2:2
Task B: Use the following maps to complete the questions:
Plantsburgh
2090
30
Watertown
35920
988
Lake Ontario
Rochester
317
Buffalo
2911
20
29 960
18
Lake
Erie
-992-
Utica
42,
983)
39
Albany
Ithaca
-996
051
36
40 960
1000
38
1004
1008
1. Which type of pressure center is shown on the map?
a) Low pressure
b) High pressure
une used to collect this data
Answer:
1. B2. A3. B4. B5. CI HOPE IT HELPS :) 100% surenesswhich of the following solids would not decompose on heating
Answer:
Anhydrous sodium carbonate is stable to heat and does not decompose even when it is heated to redness. This is because sodium carbonate salt on heating with acids react to release carbon dioxide.
Can someone help me Balance chemical equations please
In what direction does erosion always occur?
a. Downhill
b. Uphill
C. South
d. West
PLEASE HELP: 60 POINTS
Select all that apply!
The emission of a Beta particle has the effect of:
a change in mass of an electron emitted from the nucleus
decreasing mass by one unit
increasing mass by one unit
adding a proton to the nucleus
converting 1 neutron to 1 electron and 1 proton
Answer:
all of they above
Explanation:
4 Hydrogen has three naturally occurring isotopes. H.1, H-2, and H-3 The atomie mass of Hydrogen is 1.097 Which isotope is most abundant in nature? Explain
Answer:
The number following the name of the element is the number of subatomic particles inside the nucleus of the atom. This means that it is the mass number of the isotope. The average atomic mass of the element is the sum of the products of the percentage abundance and mass number of the naturally occurring isotopes.
Since, the average atomic mass of the hydrogen is nearest to 1 then, the most abundant isotope should be hydrogen-1.
How is the Methane on Titan similar to water on Earth?
3. What tool do we use to measure force?
Answer:
A force meter
calculate the [H+] if the [OH-] is 7.34x10^-10
pls show work
Which stateinent is accurate?
what is the answer to N2+H2=NH3
Explanation:
This can be fixed by multiplying the product contacting nitrogen by 2. o The new chemical equation is N2 +H2 →2 NH3. Reactants. Products. Nitrogen. 2. 2.
3.3 mol Fe(OH)3 and 6.3 mole H2SO4react according to the equation 2Fe(OH)3 + 3H2SO4 → Fe2(SO4)3 + 6H2O.
If the limiting reactant is Fe(OH)3, determine the amount of excess reactant that remains. Answer in units of mol.
Answer and Explanation:
2 mol of Fe(OH)3 produces 1 mol of Fe2(SO4)3 then 2.1 mol of Fe(OH)3 will produce (1)/(2) x 2.01 = 1.05 mol of Fe2(SO4)3 amount of H2O = (6)/(2) * 2.01 = 6.03 mol HO2
Determine the empirical formula of the compound with the percent composition of 26.6% K, 35.3% Cr and 33.0% O. *
3 points
Answer:
KCrO₃
Explanation:
26.6% K, 35.3% Cr and 33.0% O
The steps in obtaining the empirical formulae from percentage composition is given as;
Step 1:
Divide the percentage composition by the atomic mass of the elements
K = 26.6 / 39.0983 = 0.6803
Cr = 35.3 / 51.9961 = 0.6789
O = 33.0 / 16 = 2.0625
Step 2:
Divide all though by the smallest number (0.6789)
K = 0.6803 / 0.6789 = 1.002
Cr = 0.6789 / 0.6789 = 1
O = 2.0625 / 0.6789 = 3.038
The Empirical formular is the ratio between the elements. This given as;
KCrO₃
If the mass of all the reactants in a chemical reaction is 100g, what will the mass of all products be?
CAN SOMEONE PLEASE HELP ME WITH THIS?!!!!
Answer:
1. A. 9 eggs
2. B. 5:3
3. C. Exactly 44 g
4. C. Mass and atoms only
5. D. 6.81 g of PH₃
6. C. 88.4%
7. B. O₂
8. D. 30.8 g CO₂
9. B.
10. B.
11. C. 99 g
12. D. mole ratio
13. C. Theoretical
14. A. 6.0 mol H₂O
15. D. 39.7 g CH₃OH
16. A. 650 g HgO
17. D. 8.8 mol H₂
18. B. 82.6%
Explanation:
1. The number of eggs it takes to make 1 cake = 3 eggs
The number of eggs it takes to make 3 × 1 = 3 cake = 3 × 3 = 9 eggs
Therefore, the correct option is;
A. 9 eggs
2. The given reaction is presented as follows;
C₃H₈(g) + 5O₂(g) → 3CO₂(g) + 4H₂O(l)
In the above reaction, we have;
Moles of , O₂, reacted = 5 moles
Moles of , CO₂, produced = 3 moles
The ratio of the of O₂ reacted to moles of CO₂ produced = 5 moles:3 moles
∴ The ratio of the of O₂ reacted to moles of CO₂ produced = 5:3
The correct option is;
B. 5:3
3. The reaction is presented as follows;
O₂ (g) + C(s) → CO₂ (g)
From the reaction, 1 mole (12 g) of carbon produces 1 mole of CO₂
The molar mass of CO₂ = The mass of 1 mole of CO₂ = 44.01 g/mol
Given that the reaction is completed, the mass of CO₂ produced = The mass of 1 mole of CO₂ ≈ 44 g
The correct option is;
C. Exactly 44 g
4. The given reaction is presented as follows;
N₂ + 3 F₂ → 2NF₃
The initial number of atom = 2 + 6 = 8
The final number of atom = 2 × 4 = 8
∴ The initial number of atom = The final number of atom
Therefore, the number of atoms is conserved;
The mass of the reactants ≈ 28 g/mol + 3 × 37.996806 g/mol ≈ 141.993612 g/mol ≈ 142 g/mol
The mass of the product ≈ 2 × 71 g.mol = 142 g/mol
∴ The mass is conserved
Moles of reactants = 1 + 3 = 4
Moles of products = 2
∴ The number of moles is not conserved
The correct option is
C. Mass and atoms only
5. The molar mass of P₄ = 123.895048 g/mol
One mole of P₄ (123.895048 g) produces four moles (4 × 34.00) of PH₃
6.20 g of P₄. will produce (4 × 34.00)/(123.895048) × 6.20 g ≈ 6.80576 g ≈ 6.81 g
The correct option is D. 6.81 g of PH₃
6. The percentage yield = ((The actual yield)/(The ideal yield)) × 100
The actual yield of silver = 38.1 g
The ideal yield of silver = 43.1 g
∴ The percentage yield = ((38.1 g)/(43.1 g)) × 100 = 88.3990719258% ≈ 88.4%
The percentage yield = 88.4%
The correct option is C. 88.4%
7. The given chemical equation is presented as follows;
CS₂ (g) + 3 O₂ (g) → CO₂ (g) + 2 SO₂ (g)
The number of moles in 192 g of O₂ = 192 g/(32 g/mol) = 6 moles
Given that 3 moles of O₂ reacts with 1 mole of CS₂ to produce 1 mole of CO₂ and 2 moles SO₂, therefore 2 × 3 = 6 moles of O₂ will reacts with 2 × 1 = 2 moles of CS₂ to produce 2 moles of CO₂ and 4 moles SO₂
∴ The limiting reactant is;
B. O₂
8. The given chemical equation is presented as follows;
2 C₈H₁₈ (g) + 25 O₂ (g) → 16 CO₂ (g) + 18 H₂O (l)
The number of moles in 10 g of C₈H₁₈, n₁ = (10 g)/(114.26 g/mol)
The number of moles of CO₂ produced, n₂ = (10 g)/(114.26 g/mol) × 16/2 ≈ 0.7 moles
The mass of CO₂ produced, m ≈ 44.01 × n₂ ≈ 44.01 g/mol × 0.7 moles ≈ 30.807 grams ≈ 30.8 grams
The theoretical yield of CO₂ from completely burning 10.0 g of C₈H₁₈ ≈ 30.8 grams of CO₂
The correct option is D. 30.8 g CO₂
9. The correct option is B. The limiting reactants determine the maximum amount of product that can be formed
10. Option B, which has 3 atoms of each element combining to form a product with 1 atom of one element and 2 atoms of the other element
The correct option is B.
11. By the conservation of mass, we have;
The mass of the reactants = The mass of the products
Let 'x' represent the mass of zinc in the products of the reaction
Therefore, we have;
61 g of calcium + 207 g of zinc chloride = 169 g of calcium chloride + x g of Zinc
∴ x g = 61 g + 207 g - 169 g = 99 g
The mass of zinc in the products of the reaction, x g = 99 g
The correct option is;
C. 99 g
12. The quantity that must be used to convert from one chemical substance to another is the mole ratio
The correct option is D. mole ratio
13. The maximum mass of the product that could form in a reaction is called the theoretical yield, which is option C.
The correct option is C. Theoretical
14. 1 mole of O₂ produces 2 moles of water (H₂O), therefore;
3 × 1 = 3.0 moles of O₂ will produce 3 × 2 = 6 moles of H₂O
The correct option is
A. 6.0 mol H₂O
15. 2 mole × 2.02 g/mol = 4.04 g of H₂ (g) produces 32.05 g CH₃OH (l)
∴ 5 g of H₂ (g) will produce 32.05 g × 5/4.04 ≈ 39.6658416 g ≈ 39.7 g of CH₃OH
The correct option is;
D. 39.7 g CH₃OH
16. 2 (2 × 216.59 g = 433.18 g) moles of HgO produces 1 mole of O₂
1.5 mole of O₂ will be produced by 1.5 × 2 = 3 moles (3 × 216.59 g = 649.77 g ≈ 650 g) of HgO
The correct option is A 650 g HgO
17. 3 moles of H₂ produces 2 moles of NH₃
The number of moles of NH₃ in 100 g of NH₃, n = 100 g/(17.04 g/mol) = 5.868544 moles
The number of moles of H₂ that will produce 5.868544 moles of NH₃ = 3/2 × 5.868544 moles = 8.802816 moles ≈ 8.8 moles
Therefore, the correct option is;
D. 8.8 mol H₂
18. The theoretical yield of PbO = (223.2/331.2) × 9.90 g = 6.67173913 g
The percentage yield = (5.51 g)/(6.67173913 g) × 100 ≈ 82.6%
The correct option is option B 82.6%.
The effective nuclear charge of a neutral atom aluminum, Al with atomic number 13 is
Answer:
wala hindi ko yan alam ty
Where are the volcano located
Answer:
In the ring of fire
Hope this acc helps
Question: why do astronauts wear organge suits vs white suits
Full answer please..
Which substances are most likely acids? Check all that apply. CH4, HI, NH3, HNO3, NaCI
How
much heat must be added to
85g
of water
to raise its temperature 225?
Answer:
One of water's most significant properties is that it takes a lot of heat to it to make it get hot. Precisely, water has to absorb 4,184 Joules of heat (1 calorie) for the temperature of one kilogram of water to increase 1°C.
Explanation:
Identify the shape below:
PLEASE HELP
Answer:
linear angleee
Explanation:
lol i dont know what to put here
Answer:
B) Bent
There are a lot of types of bents but this one is linear bent.
Write a strong claim about the question:
What shape are cells?
( i don't really need a long answer)
Answer:
Usually, the cells are round, elongated or spherical. There are also some cells which are long and pointed on both the ends. Such cells exhibit spindle shape. In some cases, the cells are very long.
Explanation:
Hope I helped! Brainliest plz!
Calculate the number of moles of NaOH contained in 250. mL of a 0.05M solution?
Answer:
0.0125 moles of NaOH are present
Explanation:
Molarity, M, is an unit of concentration widely used in chemistry. Is defined as the ratio between moles of solute (In this case, NaOH) and liters of solution.
250.0mL are = 0.250L of solution. As the molarity of the solution is 0.05M = 0.05moles / 1L, the moles present are:
0.250L * (0.05moles / 1L) =
0.0125 moles of NaOH are presentWhat is the primary difference between a molecule and a compound?
A. All molecules are compounds, but not all compounds are molecules
B. Molecules always contain only one type of atom, unlike compounds
C. Compounds must be composed of more than one type of atom
Answer:
A. "All molecules are compounds, but not all compounds are molecules"
Explanation:
An example of a compound-molecule is oxygen. The elemenal is O, because the periodic table isn't describing molecules, it's describing atoms. The molecule is O2 because it takes 2 O atoms to make a molecule of oxygen.
The primary difference between a molecule and a compound is 'compounds must be composed of more than one type of atom'.
Explanation:
A molecule is a group of atoms of the same or different types of atoms bound to each other.Molecules are the smallest unit of a substance that possesses the characteristic of the substance.A compound is a substance in which two or more different types of atoms are bound to each other.In compounds, atoms of different elements are in a fixed proportion.So, from this, we can conclude that the primary difference between a molecule and a compound is 'compounds must be composed of more than one type of atom'.
Learn more about molecules and compounds here:
brainly.com/question/473667?referrer=searchResults
brainly.com/question/2157783?referrer=searchResults
2 HCl (9)
=H2(g) + Cl2 (9)
K = [H][CI]/[HCI)
UK = [H][CI]/2[HCI]
K = 2[HC]/[H]CI.)
K = [HCI)?/[H][1]
Answer:
(K) = [H2] [Cl2] / [HCl]²
Explanation:
The equation of the reaction is given as;
2 HCl (g) ⇔ H2 (g) + Cl2 (g)
The Equilibrium constant is the ratio of the concentration of the products and reactants raised to the power of their coefficients
Products = H2 and Cl2
Reactants = HCl
Equilibrium constant (K) = [H2] [Cl2] / [HCl]²
The energy transformation in an electromagnetic is from chemical to electrical to electromagnetic waves.
True or False?
what is in veins and artery
Answer:
the veins and arteries are the things that distribute blood throughout your body. There was a lot more blood in the arteries, that's making them very important and should not be cut ever. Veins on the other hand can be cut but you should still not cut them to begin with as if to not lose any blood. They distribute blood throughout your body that comes from your heart and helps muscles skeletal another systems of your body work.
In the future the universe will most likely
Answer:A
Explanation: The universe is always expanding at all times. It dosnt expand that much though, very little