What is the molarity of solution that contains 5.80 grams of nickel nitrate,ni(no3)2 in


Answer 1
Answer: Molarity is defined as the number of moles of solute in 1 L of solution 
molar mass of Ni(NO₃)₂ - 182.7 g/mol
number of moles of Ni(NO₃)₂ - 5.80 g/ 182.7 g/mol = 0.0317 mol
number of moles in 500 mL - 0.0317 mol
therefore number of moles in 1000 mL - 0.0317 mol / 500 mL x 1000 mL/L 
molarity of the solution is - 0.0634 M

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Students working in lab accidentally spilled 17 l of 3.0 m h2so4 solution. they find a large container of acid neutralizer that contains baking soda, nahco3. how many grams of baking soda will be needed to neutralize the sulfuric acid spill? do not include a unit in your answer or it will be counted wrong. use correct significant figures


The mass of baking soda required is 4284 g.

The reaction equations given as;

H2SO4(aq) + NaHCO3(aq) ------>  H2O(l) + CO2(g) + NaHSO4(aq)

The number of moles of H2SO4 that was spilled is obtained from;

n = 17 L × 3M = 51 moles

We can see from the reaction equation that the reaction is a 1:1 reaction, this implies that 51 moles of NaHCO3.

Hence, mass of baking soda required = 51 moles ×84 g/mol = 4284 g

Learn more about neutralization:

Answer is: 8568.71 of baking soda.

Balanced chemical reaction: H₂SO₄ + 2NaHCO₃ → Na₂SO₄ + 2CO₂ + 2H₂O.

V(H₂SO₄) = 17 L; volume of the sulfuric acid.

c(H₂SO₄) = 3.0 M, molarity of sulfuric acid.

n(H₂SO₄) = V(H₂SO₄) · c(H₂SO₄).

n(H₂SO₄) = 17 L · 3 mol/L.

n(H₂SO₄) = 51 mol; amount of sulfuric acid.

From balanced chemical reaction: n(H₂SO₄) : n(NaHCO₃) = 1 :2.

n(NaHCO₃) = 2 · 51 mol.

n(NaHCO₃) = 102 mol, amount of baking soda.

m(NaHCO₃) = n(NaHCO₃) · M(NaHCO₃).

m(NaHCO₃) = 102 mol · 84.007 g/mol.

m(NaHCO₃) = 8568.714 g; mass of baking soda.


Test: starting the investigation: how to identify elements, compounds, and mixtures


Elements, compounds and mixtures can be grouped into pure substances and impure substances.
Both elements and compounds is in the group of pure substances, while mixture is impure substance.

First talk about mixture, that would be easier. Mixture can be identified from many aspects.
First, in mixtures, the constitution elements still retain their own properties. For example in Iron and Sulphur mixture, iron can be attracted to magnets meanwhile iron II sulphide compund doesn't.
Mixtures can be separated by using simple physical methods, such as evaporation, filtration, chromatography etc.

In compunds, however we can only separate them using chemical methods, which include using electricity (electrolysis) or apply heat.
For example we know that water is a compund because we can separate it into hydrogen and oxygen by using electrolysis.

In elements, it's impossible to further simplify it, not even with chemical methods. For example, there's no way to further separate hydrogen into other elements.

Which defines health? A life expectancy

B absence of illness

C presence of goals

D overall well-being


I mean this is pretty obvious it's D. life expectancy is sort of close but not really. B is close too but it's not it bc that's not what health is. you could be over weight and not be sick and it still isn't healthy. and C isn't close at all. hope this helps, have an amazing day :)

Which statement describes the general trends in electronegativity and metallic properties as the elements in Period 2 are considered in order of increasing atomic number?
(1) Both electronegativity and metallic properties decrease.
(2) Both electronegativity and metallic properties increase.
(3) Electronegativity decreases and metallic properties increase.
(4) Electronegativity increases and metallic properties decrease.


(3) Electronegativity decreases and metallic properties increase is your answer. 

WILL MARK BRAINLIEST Write a paragraph that explains the difference and similarities between solid, liquid, and gas particle motion.



They all vibrate, but they all move differently.


Similarities: They all consist of particles and vibrate, just at different frequencies.

Differences: The particles in solids move slowly and vibrate. In liquids, they move a bit quicker and slide past one another. They will also take the shape of the container they're in. In gases, they move freely at high speeds and also taking the shape of the container.

Hope this helped! :)


What things contain pva besides face masks


PVA stands for Polyvinyl alcohol. It is a synthetic polymer which is water-soluble. It found application in coatings, textiles and papermaking. Aside from being used in face masks, it can be found in eye drops, paper products, contact lens solution and glues. PVA is known to be a biodegradable polymer and is non-toxic. It is odorless and colorless. Its main uses are as an emulsion polymerization substance in order to make  polyvinyl acetate or PVAc dispersions. This polymer is not produced by polymerization of its monomer. It is made by polymerizing vinyl acetate then the polyvinyl acetate is then transformed to PVA.

You are presented with a mixture of iron beads and iron filings. how can you separate them? use a magnet dissolve the filings in water use a screen distillation


I believe the correct answer from the choices listed above is the last option. You can separate the mixture of  iron beads and iron filings by using a screen distillation. Since they surely have different sizes so you can easily separate by filtration. Hope this answers the question.

Answer: use a screen

Explanation: As the mixture is of iron beads and iron filings, they cannot be separated using magnet as both will be attracted towards the magnet.

Iron beads and iron filings do not dissolve in water and thus remain as such when dissolved in water.

Using a screen can help as size of iron beads and iron filings is different. Iron fillings being in powder form will sieve through the screen and iron beads will remain on the screen. Thus can be separated.

Distillation is used to separate mixture of two liquids.


f an electron has a mass of 9.709 x 10-31 kg, and a proton has a mass of 1.672 x 10-27 kg, approximately how many electrons are required to have the same mass as one proton?



The answer is 1722 e⁻


Let's make a rule of three:

9.708×10⁻³¹ kg is the mass of 1 e⁻

1.672 ×10⁻²⁷ kg (which is 1 p⁺), how many e⁻ does it contain.?

1.672 ×10⁻²⁷ kg / 9.708×10⁻³¹ kg

The answer is 1722 e⁻


As altitude increases air pressure decreases

true or false


True. Pressure decreases with increasing altitude. 




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