Answer:
15.3 g
Explanation:
Fe₂O₃ (s) + 2Al (s) → 3Fe (l) + Al₂O₃ (s)First we convert 8.0 grams of aluminum into moles, using its molar mass:
8.0 g Al ÷ 27 g/mol = 0.30 mol AlThen we convert 0.30 moles of aluminum into moles of aluminum oxide, using the stoichiometric coefficients:
0.30 mol Al * [tex]\frac{1molAl_2O_3}{2molAl}[/tex] = 0.15 mol Al₂O₃Finally we convert 0.15 moles of Al₂O₃ into grams, using its molar mass:
0.15 mol Al₂O₃ * 102 g/mol = 15.3 g Al₂O₃How
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:
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% surenessAir 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)
Which substances are most likely acids? Check all that apply. CH4, HI, NH3, HNO3, NaCI
What is the mass in grams of 0.94 moles of sodium bicarbonate. NaHCO3?
Mass of a substance = Moles of a substance × molar mass of a substance
We have 0.94 moles of NaHCO3. The molar mass of NaHCO3 is the sum of the atomic masses of the elements comprising NaHCO3, which is approximately 84.007 g/mol.
The mass of 0.94 moles of sodium bicarbonate is therefore (0.94 moles NaHCO3)(84.007 g NaHCO3/mol NaHCO3) = 78.97 ≈ 79 grams of sodium bicarbonate.
Where are the volcano located
Answer:
In the ring of fire
Hope this acc helps
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
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:
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
Question: why do astronauts wear organge suits vs white suits
Full answer please..
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!
Which stateinent is accurate?
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 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.
The energy transformation in an electromagnetic is from chemical to electrical to electromagnetic waves.
True or False?
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
The effective nuclear charge of a neutral atom aluminum, Al with atomic number 13 is
Answer:
wala hindi ko yan alam ty
Which system controls organs in times of stress?
Answer:
The autonomic nervous system has a direct role in physical response to stress and is divided into the sympathetic nervous system (SNS), and the parasympathetic nervous system (PNS). When the body is stressed, the SNS contributes to what is known as the “fight or flight” response.
Explanation:
Balance the equation:
C6H1206 + 02 → CO2 + H2O
Answer:
c6h12o6 + 6o2 = 6co2 + 6h20
Explanation:
c6h12o6 + 6o2 = 6co2 + 6h20
0 = 18 18
h = 12 12
c = 6 6
How many moles of gas are contained in a 50.0 L cylinder at a pressure of 100.0 atm and a temperature of 35.0°C?
Answer:
n = 2 moles (1 sig-fig)
Explanation:
Using the Ideal Gas Law equation (PV = nRT), solve for n (= moles) and substitute data for ...
pressure = P(atm) = 100atm
volume =V(liters) = 50L
gas constant = R = 0.08206L·atm/mol·K
temperature = T(Kelvin) = °C + 273 = (35 + 273)K = 308K
PV = nRT => n = PV/RT = (100atm)(50L)/(0.08206L·atm/mol·K)(308K)
∴ n(moles) = 1.978moles ≅ 2 moles gas (1 sig-fig) per volume data (= 50L) that has only 1 sig-fig. (Rule => for multiplication & division computations round final answer to the measured data having the least number of sig-figs).
Moles are the ratio of the mass and the molar mass of the substance. In a 50.0 L cylinder, 2 moles of gas are present at 100 atm and 35 degrees celsius.
What is an ideal gas equation?An ideal gas equation states the relationship between the moles of the substance, temperature, pressure, and volume. The ideal gas equation is given as,
[tex]\rm PV = nRT[/tex]
Given,
The pressure of the gas (P) = 100.0 atm
Volume of the gas (V) = 50.0 L
Temperature (T) = 308 K
Gas constant (R) = 0.08206 L atm/mol K
Substituting values in equation moles (n) is calculated as:
[tex]\begin{aligned} \rm n&= \rm \dfrac{PV}{RT}\\\\&= \dfrac{100 \times 50}{0.08206 \times 308}\\\\&= 1.978\end{aligned}[/tex]
Therefore, 1.978 or 2 moles of gas are present.
Learn more about moles here:
https://brainly.com/question/20343774
which 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.
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.
In what direction does erosion always occur?
a. Downhill
b. Uphill
C. South
d. West
What 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
How is the Methane on Titan similar to water on Earth?
In the reaction below identify the products. CH4 + 202 --> CO2 + 2H2O
Answer:
CO2 and H20
Explanation:
The products are on the right hand side of the equation.
Can someone help me Balance chemical equations please
Which element would you predict to have the highest first ionization energy? Why?
a) neon or carbon
b) fluorine or francium
c) beryllium or strontium
d) iodine or fluorine
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
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.