Answer:
18.4 mmHg. The answer is 18.4 mmHg.
All of the following elements are metals EXCEPT?
A. Br B. Co C. Cu D. Zn
Answer:
Br
Explanation:
How many liters are 1.20 g of oxygen?
Answer:
The required volume is 0.84 L
Explanation:
Given,
Mass of O2 gas = 1.20 g
We know,
At STP, molar volume of all gases is 22.4 L
and Molar mass of O2 gas is 32 g
Now,
Number of moles = mass/molar mass
= 1.20/32
= 0.0375
Again,
At STP,
Number of moles = Volume/Molar volume
or, Volume = Number of moles X Molar Volume
or Volume = 0.0375 X 22.4
∴ Volume = 0.84 L
So, the required volume is 0.84 L
2Cr^3 + 3Zn(s) -> 2Cr(s) + 3Zn^2 + (aq) which reactant is reduced and which is oxidicided
Answer:
Cr is oxidised
and
Zn is reduced
[ Reduced reactant ] :
Cr^( + 3 ) + 3 e^( - 1 ) ===》 Cr^( 0 )
_____________________________
[ Oxidicided reactant ] :
Zn^(0) ===》Zn^( + 2 ) + 2 e^( - 1 )
I'll give brainless! no l!nks!!!
1. Imagine a very warm 60 degree day in January with a steady rain. What type of air mass would you expect to be bringing in this weather pattern?
2. Imagine a very cold 20 degree day in January with lots of blue sunny skies. What type of air mass would you expect to be bringing in this weather pattern?
Answer:
Maritime tropical air mass
Continental polar air mass
pls help me guys please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please
5) B
6) C
7) B newland, law of octaves
8) A)
Which oxide is covalent?
A. AsO2 B. K2O
C. CuO D. ZnO
Answer:
A.
Cu Zn K is are metals which form ionic bond with oxygen
What type of element is fluorine
Answer:
It is a halogen element
Explanation:
hope this helps
have a great day/night
If I have 1.9 moles of gas held at a pressure of 5 atm and in a container with a volume of 100 liters, what is the temperature of the gas? 3205K
Answer:
T = 3206.89 K
Explanation:
Given that,
Number of moles, n = 1.9 moles
Pressure, P = 5 atm
Volume, V = 100 L
We need to find the temperature of the gas. Let the temperature is T. We know that,
PV = nRT
Where
R is gas constant, R = 0.08206 L-atm/mol-K
Put all the values,
[tex]T=\dfrac{PV}{nR}\\\\T=\dfrac{5\times 100}{1.9\times 0.08206 }\\\\T=3206.89\ K[/tex]
So, the temperature of the gas is 3206.89 K.
A metal object with mass of 29.0 g is heated to 97.0 °C and then transferred to an insulated container containing 95.8 g of water at 20.5 °C. The water temperature rises and the temperature of the metal object falls until they both reach the same final temperature of 23.7 °C. What is the specific heat of this metal object? Assume that all the heat lost by the metal object is absorbed by the water.
Answer:
0.603J/g°C is the specific heat of the metal object
Explanation:
To solve this question we must know the heat given by the metal is equal to the heat absorbed by the water. The change in heat follows the equation:
Q = m*S*ΔT
Where Q is heat in Joules, m is the mass of the substance, S its specific heat and ΔT change in temperature
The equation to solve the problem is:
m(Object)*S(Object)*ΔT(Object) = m(Water)*S(Water)*ΔT(Water)
Where:
m(Object) = 29.0g
S(Object) = ??
ΔT(Object) = (97.0°C - 23.7°C = 73.3°C)
m(Water) = 95.8g
S(Water) = 4.184J/g°C
ΔT(Water) = (23.7°C - 20.5°C = 3.2°C)
29.0g*S(Object)*73.3°C = 95.8g*4.184J/g°C*3.2°C
S (Object) * 2125.7g°C = 1282.6J
S(Object) = 0.603J/g°C is the specific heat of the metal object
How can the coefficients in a balanced chemical reaction be used to convert from moles of a reactant to moles of a product?
The coefficients in a balanced equation can be used as molar ratios, which can act as conversion factors to relate the reactants to the products. These conversion factors state the ratio of reactants that react but do not tell exactly how much of each substance is actually involved in the reaction.
Which pair of formulas represents the empirical formula and the molecular formula of a compound?
Answer:
CH2O and C6H12O6
Explanation:
To find an empirical formula, take a molecular formula and divide the subscript of each element by the greatest common factor of all the subscripts. In this case, the only pair that works is CH2O,C6H12O6, which can be verified by dividing the coefficients of the molecular formula by 6.
how does a flourmill work?
Explanation:
Answer ⬇️
These mills employed millstones that rotated against one another to crush grains into flour mill machine. They rely on a process of crushing grain between two rapidly rotating rollers, then separating the ground grain into individual components, including bran, germ and endosperm.
➡️dhruv73143(⌐■-■)
what does Avogadro's law state and what is the formula
The law is approximately valid for real gases at sufficiently low pressures and high temperatures. The specific number of molecules in one gram-mole of a substance, defined as the molecular weight in grams, is 6.02214076 × 1023, a quantity called Avogadro's number, or the Avogadro constant.
Answer:
Hello There!!
Explanation:
The answer is that it states that under the same pressure and temperature conditions, equal volumes of all gases contain the same number of molecules.
Formula:Vn=k
hope this helps,have a great day!!
~Pinky~
If 250. ML of water are poured into the measuring cup, the volume reading is 8.45 oz . This indicates that 250. ML and 8.45 oz are equivalent. How many milliliters are in a fluid ounce based on this data?
Answer:
[tex]1oz=29.589ml[/tex]
Explanation:
From the question we are told that:
Initial Volume [tex]v_1=250ml[/tex]
Final Volume [tex]v_2=8.45oz[/tex]
Generally the equation for one ounce is mathematically given by
[tex]1oz=\frac{v_1}{v_2}[/tex]
Therefore
[tex]1oz=\frac{250}{8.45}[/tex]
[tex]1oz=29.589ml[/tex]
sam was given the following equation to balance: H2O->H2+O2. she balanced it as follows: 2H2O->H2+O2. what did she do wrong? what is the correct way to balance the equation?
Answer:
2H2 in products
Explanation:
she should have added another 2 in H2
The edited equation does not balance the number of hydrogens. The correct balanced equation for the given reaction is written as follows:
[tex]\rm 2H_{2}O \rightarrow 2H_{2} +O_{2}[/tex].
What is balanced chemical equation?The balanced chemical equation of a reaction represents the perfect stochiometric coefficients of all the reactants and products. Thus, each elements in the reaction have to be equal in both side.
According the mass conservation law, the total mass of the reactants is equal to the total mass of the products. Thus, all elements have to balanced on each side.
When water dissociates into hydrogen and oxygen molecules, 2moles of water undergoes dissociation to give two moles of H2 and one mole of O2. Thus the balanced equation is:
[tex]\rm 2H_{2}O \rightarrow 2H_{2} +O_{2}[/tex]
To find more on balanced reactions, refer here:
https://brainly.com/question/22064431
#SPJ2
What is the correct name for the chemical formula N408?
Answer:
molar mass (molar weight)
Explanation:
I am one percent away from failing. I just need help. No false answers
How many grams of Al(OH)3 are produced from 3.00 g of AlCl3 with excess of NaOH?
Answer:
I did it in steps in the picture I just hope it helps you to understand:)
The pressure of a sample of helium in a 200. ml container is 2.0 atm. If the helium is compressed to a pressure of 40. atm without changing the temperature, what would be the new volume of the gas
Answer:
[tex]V_2=10mL[/tex]
Explanation:
Hello there!
In this case, according to the given information, it will be possible for us to solve this problem by using the Boyle's law as an inversely proportional relationship between pressure and volume:
[tex]P_2V_2=P_1V_1[/tex]
In such a way, we solve for the final volume, V2, and plug in the initial volume and pressure and final pressure to obtain:
[tex]V_2=\frac{P_1V_1}{P_2} \\\\V_2=\frac{2.0atm*200.mL}{40.atm}\\\\V_2=10mL[/tex]
Regards!
please help asap i will mark you as brainly and give u 10 points ( don’t mind the answer i accidentally clicked )
Answer:
Negative 5
Explanation:
I am not 100% sure btw
significant figures to 2.3 x 4.50
Answer:
10.35= 4 sig figs but change it to 2 since it's 2.3 is the lowest number
10.
hope this helps
have a good day :)
Explanation:
Two hundred liters of helium at 2.00 atm and 28.0 °C is placed into a tank with an internal pressure of 5.92 atm. Find the volume of the helium
after it is creleased into the tank when the temperature of the tank.remains 28.0°C.
liters (Round to three sig figs)
Answer:
27*6 dkfkdh hshsnnsbssshs ss. hhshsns svs s ssjssgsyz
Explanation:
ysgshssbs
How many grams of magnesium are in sample containing 9.12+ 10 ^23atoms
Answer: There are 1.51 moles present in [tex]9.12 \times 10^{23}[/tex] atoms.
Explanation:
According to the mole concept, there are [tex]6.022 \times 10^{23}[/tex] atoms present in one mole of every substance.
Hence, moles present in [tex]9.12 \times 10^{23}[/tex] atoms are calculated as follows.
[tex]Moles = \frac{9.12 \times 10^{23}}{6.022 \times 10^{23}}\\= 1.51 mol[/tex]
Thus, we can conclude that there are 1.51 moles present in [tex]9.12 \times 10^{23}[/tex] atoms.
The concentration of carbon-14 in a piece of wood from an ancient burial mound indicates that two half-lives of this radioisotope have passed. If the half-life (t 1/2) for carbon-14 is 5730 years, approximately how many years ago did this sample of wood die?
If the half-life for carbon-14 is 5730 years, then it will take 11,460 years to complete die of this sample.
What is half life period?Half life period is a time of decay in which concentration of reactant is left half of its initial concentration, means half of the reactant will convert into product.
Total time of decay will be calculated as:
T = (t)ⁿ, where
t = half life time = 5730 years
n = number of half lives = 2 (given)
On putting values, we get
T = (5730)² = 11,460 years
Hence required time for decay is 11,460 years.
To know more about half life time, visit the below link:
https://brainly.com/question/2320811
Answer:
The first part is 5 and the second part is 28,650
21. What type of cells are found on the retina and provide signals to the brain about incoming light?
A photoreceivers
B optic cells
C photoreceptors
D retina cells
Answer:
Explanation:
have a good day
3. How is the equilibrium position of this reaction affected
by the following changes?
2802 (g) + O2 (g) <-------------→ 2 S03(g) + heat
a. Lowering the temperature.
b. Decreasing the pressure
c. Removing oxygen
d. Adding sulfur trioxide (SO3).
Answer:
Explanation: a) Reaction is exothermic because heat is released
If temperature is lowered, amount of products is increased,
equilibrium transfers to right
b) If pressure decreases, equilibrium transfers to direction in which amount of gas moles is greater, also in left (reactants)
c) If Oxygen is removed, reaction which produces more oxygen is favoured, also balance changes to reactansts (left)
d) Adding product causes equilibrium transfer to left (reactansts)
Help? s/o to itsdevilsj754
Explanation:
A geological process where materials of Earth are transported from one place to another by natural forces like wind or water is called erosion.
When materials of Earth are deposited over a certain landmark due to transportation by natural forces then this process is called deposition.
The four major causes of erosion and deposition are as follows.
Gravity - Force that is responsible for attracting an object towards the center of Earth.
Running water - Water present in the rivers, oceans or lakes is moving from one place to another. Also, along with it carries pebbles or other materials.
Wind Waves - This is basically air and it keeps on moving from one place to another all the time. Wind waves tend to carry dust particles or other materials along with it.
Glaciers - When a mass of ice that is formed by accumulation and compaction of snow over mountains or around the poles tends to move slowly is called glaciers.
HI! I REALLY NEED HELP WITH THIS, THANK YOU!
ig The right answer is -Give the reaction more time.
Why might metamorphic rocks show signs of blending and distortion?
Answer:
because of heat and pressure
does neutrons have a orbit outside the atom
Answer:
No because it's located inside the nucleus of the atom
hope this helps
have a good day :)
Explanation:
Which process requires energy for a nonspontaneous redox reaction to occur?
Answer: Electrolysis
Explanation: ♀️