Answer:
Metals
Explanation:
please help, will give brainliest
Answer:
See explanations and answers below
Explanation:
From the equation each mole calcium bromide makes 2 moles sodium bromide
1) 5 x 2 = 10 moles sodium bromide
2) 2 moles of calcium bromide will make 2 moles of calcium sulfate ( from the equation)
mole weight of calcium sulfate =
Ca = 40 S = 32 O4 = 64 total mole weight = 136 gm
two moles would weigh 272 gms
3) 845 gm of calcium sulfate is 845 gm / 136 gm/mole = 6.21 moles
6.21 moles of Ca Br2 will be needed
6 .21 ( 40 + 2 *79.9) = 1240.76 gm
In the bohr model of the hydrogen atom, the radius of the electron orbit increases by a factor of four. What happens to the magnitude of the orbital angular momentum of the electron?
The magnitude of the orbital angular momentum of the electron is doubled when the radius of the electron orbit increases by a factor of four.
What is orbital angular momentum?
The orbital angular momentum is the sum of angular momenta of all electrons, it is the rotational analog of the linear momentum.
The formula of angular momentum
[tex]\rm mvr = \dfrac{nh}{2 \pi}[/tex]
Thus, the magnitude of the orbital angular momentum of the electron is doubled when the radius of the electron orbit increases by a factor of four.
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Nuclear fission is the combining of small nuclei into larger ones
Answer:
False.
Explanation:
The combining of the nuclei of atoms is known as nuclear fusion.
The statement that nuclear fission is the combining of small nuclei into larger ones is false.
What is nuclear fission?Nuclear fission is a process in which one nucleus splits into two or more small nuclei. The process release large amount of energy and produce gamma photons.
Opposite to it, Nuclear fusion is a process of combining of small nuclei into larger ones.
Thus, the statement is false, because nuclear fission is a process of splitting of a nucleus.
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Acids which contain only hydrogen and a single other element are referred to as.
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A binary acid is an acid that consists of hydrogen and one other element.32
How many moles of Ca(NO) are there in a sample with a mass of 50.0 g?
a. 0.305 mol
b. 0.333 mol
c.
0.490 mol
d. 8200 mol
Answer:
0.305 mol
Explanation:
Ca(NO) is not a molecule. I think you meant to type Ca(NO3)2, which is calcium nitrate.
The moles of a compound is equal to is mass divided by its molar mass.
The molar mass of Ca(NO3)2 is 164.09 g/mol.
50.0 / 164.09 = 0.305
How does the author build understanding of body odor?
Explanation:
because the author create that body odor to people who read the things like story to they feel like hopeless
In a reaction the ->
means
Answer:
the arrow (single arrow) means that all the reactants are going to products.
ethanol is widely used in antibacterial hand sanitizer and wipes.explain
Explanation:
Ethanol works as an antiseptic as it is capable of breaking down the cellular membrane of cells/ causes cell lysis. It also denatures protiens.
When ammonium chloride is dissolved in water, the beaker gets cold. Which type of reaction does this describe?
exothermic
endothermic
both exothermic and endothermic
neither exothermic nor endothermic
Please help asap!!!!!!!!!!!
Answer:
B
Explanation:
Where velocity doesn't change, THERE IS NO ACCEL....this is section B
Damian places a negatively charged balloon in a magnetic field. Which direction will the balloon move?
1. West to East
2. East to West
3.South to North
4. North to South
Answer:
4.North to south
Explanation:
In magnetic fields, the north pole is considered negative while the south pole is considered positive. Hence the balloon will be attracted from the north towards the south pole since it is negatively charged.
2 NH3 + 3 CuO → 3 Cu + N₂ + 3 H₂O
In the above equation, how many grams of N₂ can be made when 18.4 moles of CuO are consumed?
Answer:
→ 22.9 g of N2.
Explanation:
→ The molar mass of CuO is 63.5 + 16 = 79.5
→ The molar mass of N2 is 2×14 = 28
According to the equation, for every 3 molecules of CuO, one molecule of N2 is made.
Therefore,
3×79.5 g of CuO make 28 grams of N2.
Therefore,
195 g of CuO make
[tex]28×(195/3×79.5) = 22.9 g of N2.[/tex]
sample of helium gas contains 0.22 moles of helium. How many additional moles of helium gas must be added to the sample to obtain a volume of 6.4L
The required additional moles of helium gas must be added to the sample to obtain a volume of 6.4L is 0.293 moles.
How do we calculate the required moles?Required moles of the final volume will be calculated by using the below equation as:
n₁/V₁ = n₂/V₂, where
n₁ & V₁ are the moles and volume of initial solution.
n₂ & V₂ are the moles and volume of final solution.
On putting values from the question to the equation, we get
n₂ = (0.22)(6.4) / (4.8) = 0.293 moles.
Hence required moles of helium gas is 0.293.
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What does the radical do in a seed of a plant
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It is the embryonic root inside the seed. It is the first thing to emerge from a seed and down into the ground to allow the seed to suck up water and send out its leaves so that it can start photosynthesizing. The radicle emerges from a seed through the micropyle.Which statement is true ? ( only one answer)
A) electrons are larger than protons
B) atoms are the smallest living organism
C) the number of protons in a atom determines the element
Please help me on #2 giving BRAINLIEST!
Answer:
basic
Explanation:
because H is hydrogen
What is the temperature (in °C) if 12.1 g of N2 in a 1.3 L container has a pressure of 5.8 atm?
Answer:
T=-166.8 C
Explanation:
PM=m/vRT
T=PMV/mR
T=5.8*14*1.3/12.1*0.08206
T=106.3K
=106-273.15=-166.8 C
The balanced equation shows how sodium chloride reacts with silver nitrate to form sodium nitrate and silver chloride. nacl agno3 right arrow. nano3 agcl if 4.00 g of nacl react with 10.00 g of agno3, what is the excess reactant? agcl nacl agno3 nano3
Answer:
The excess reactant is the NaCl.
Explanation:
NaCl(aq) + AgNO3 (aq) → NaNO₃(aq) + AgCl (s) ↓
This is a precipitation reaction.
We need to convert the mass of each reactant to moles:
4 g / 58.45 g/mol = 0.068 moles of NaCl
10 g / 169.87 g/mol = 0.059 moles of nitrate.
As stoichiometry is 1 by 1, 1 mol of chloride will react with 1 mol of nitrate.
If I have 0.059 moles of nitrate, I will need the same amount of chloride and I have 0.068 moles. I still have chloride, therefore the excess reactant is the NaCl.
0.068 mol - 0.059 mol = 0.009 moles are the moles of NaCl that remains after the reaction is complete
Answer:
NaCl
Explanation:
What factors have caused the rise in global temperatures over the past century?
Answer:
Explanation:
Global warming is the unusually rapid increase in Earth's average surface temperature over the past century primarily due to the greenhouse gases released as people burn fossil fuels.
What is the total heat energy required to
raise the temperature of 10g of liquid water
from 20 degrees Celsius to 150
degrees Celsius?
Answer: 200 j
Explanation:
A device that sends electrical impulses to the heart to correct an irregular
heartbeat is called what?
O A. A pacemaker
O B. An electrical heart valve
O C. A nanotube
O D. A stent
if you have 4.00 moles of gas at a pressure of 6.35 atm and a temperature of 1973 K, what is the volume
Answer:
101.98 L
Explanation:
Ideal Gas Law PV = n R T R = gas constant = .082057 L-atm/mol-K
6.35 (V) = 4 * .082057 * 1973
V = 101.98 L
What is the Mass of 1 mole of N2? Show your work
Answer:
28 g/mol
Explanation:
since the atomic weight of Nitrogen is 14 you take the amount of it and multiply it by that so in this case it would be this equation:
14 x 2 = 28
At 218°C, Keq=1.2 x 10^-4 for the equilibrium NH4SH(s) ⇋ NH3(g) + H2S(g). Calculate the equilibrium concentrations of NH3 and H2S if a sample of solid NH4SH is placed in a closed vessel at 218°C and decomposes until equilibrium is reached. (2 sig figs, M) (Hint: begin by writing an expression for the equilibrium constant.)
At 218 °C, solid NH₄SH decomposes to form 0.011 M NH₃ and H₂S, as given by its equilibrium constant.
What is the equilibrium constant?The equilibrium constant (Keq) is the ratio of the product of the concentrations of the products to the product of the concentrations of the reactants, all raised to their stoichiometric coefficients.
Only gases and aqueous species are included.
Step 1. Make an ICE chart.NH₄SH(s) ⇋ NH₃(g) + H₂S(g)
I 0 0
C +x +x
E x x
Step 2. Write the equilibrium constant.Keq = 1.2 × 10⁻⁴ = [NH₃] [H₂S] = x²
x = 0.011 M
At 218 °C, solid NH₄SH decomposes to form 0.011 M NH₃ and H₂S, as given by its equilibrium constant.
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42. Balance the equation below. What is the coefficient for HCI?
Help me please don’t answer then delete I will report u
Answer:
Mg + 2HCl ⇒ MgCl₂ + H₂Coefficient of HCl = 2Explanation:
Equation (given) :
Mg + HCl ⇒ MgCl₂ + H₂Compare the LHS and RHS :
On the left side, there are only single atoms of H and Cl, whereas there are 2 of each on the right sideAs HCl is a single compound on the left, multiply HCl into 2 to balance the reactionCoefficient of HCl = 2Balanced Equation :
Mg + 2HCl ⇒ MgCl₂ + H₂how can coefficients be used to balnce a chemical equation?
In a sample of copper carbonate, how much copper and oxygen would there be for 5 g of carbon?
The water in Mario's swimming pool absorbs energy as heat during the day. Which of the following
would the water in the pool be most likely to do?
Answer: evaporate
Explanation:
What type of soil has the most permeability
If 60. liters of hydrogen gas at 546 K is cooled to 273 K at constant pressure, the new volume of the gas will be
**I NEED ANSWERS STEP BY STEP PLEASE**
The new volume of H₂ gas at constant pressure is 30L.
What is new volume of H₂ gas at constant pressure at given conditions?Apply Charles law,
V₁/T₁=V₂/T₂
Put the given value
V₁=60L, T₁=546K T₂=273K V₂=?
Solve the equation
60/546=V2/273
V₂=30L
Hence, the new volume of H2 gas at constant pressure is 30L.
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