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almond37 [142]
3 years ago
7

Can anyone pls help!!!!!!1

Chemistry
1 answer:
Kruka [31]3 years ago
7 0

Answer:

Well I know that when the liquid changes from clear to dark blue and small bubbles form and rise to the surface that is a reaction

Explanation:

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If I add 475mL of water to 75.0mL of a 0.315M NaOH solution, what will the molarity of the diluted solution be?
pantera1 [17]
Answer is: <span>the molarity of the diluted solution 0,043 M.
</span>V(NaOH) = 75 mL ÷ 1000 mL/L = 0,075 L.
c(NaOH) = 0,315 M = 0,315 mol/L.
n(NaOH) = c(NaOH) · V(NaOH).
n(NaOH) = 0,075 L · 0,315 mol/L.
n(NaOH) = 0,023625 mol.
V(solution) = 0,475 L + 0,75 L.
c(solution) = 0,023625 mol ÷ 0,550 L.
c(solution) = 0,043 mol/L.
5 0
3 years ago
Which substance is one that cannot be separated or broken down into simpler substances by chemical means? (Element, pure)
Y_Kistochka [10]

Answer:

gold wire (Au)

Explanation:

A substance that cannot be separated or broken down into simpler substances by chemical means is an element.

Between the given options only gold wire is an element, Au.

A way of knowing that it is an element is noticing that its formula is a single symbol which corresponds to an element found in the periodic table, unlike a combination of said symbols (like NaCl or H₂O).

5 0
3 years ago
What are two bones that make blood cells.<br><br> (name of the bones) :)
lesantik [10]

Answer:

Long bones contain yellow bone marrow and red bone marrow, which produce blood cells.

Explanation:

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5 0
2 years ago
Calculate the osmotic pressure of a solution containing 1.502 g of (Nh4)2SO4 in 1 L at 36.54 Degrees Celcius. (The gas constant
padilas [110]

Answer:

0.2886 atm is the osmotic pressure of a solution.

Explanation:

Osmotic pressure of solution =\pi

Concentration of the solution = c

Mass of the ammonium sulfate = 1.502 g

Moles of ammonium sulfate = \frac{1.502 g}{132.16 g/mol}=0.01136 mol

Volume of the solution = 1 L

Concentration of the solution:

=\frac{\text{Moles of ammonium sulfate}}{\text{Volume of the solution}}

c=\frac{0.01136 mol}{1 L}=0.01136 mol/L

Temperature of the solution ,T= 36.54°C = 309.69 K

R = universal gas constant = 0.08206 L atm/mol K

\pi=cRT

\pi=0.01136 mol/L\times 0.08206 L atm/mol K\times 309.69 K

\pi=0.2886 atm

0.2886 atm is the osmotic pressure of a solution.

5 0
3 years ago
a scientist has developed a new type of material that is suppose to float on water. this material has a mass of 2.0g for every 3
anzhelika [568]
<span>Yes, the material will float because it has a lower density than that of water. A material will float if it has a lower density than that of the liquid it's placed in. So let's first calculate the density of this new material. Density is simply mass per volume, so doing the division. 2.0 g / 3.0 cm^3 = 0.67 g/cm^3 The density of water is 1.0 g/cm^3 and since the density of the new material is less at 0.67 g/cm^3 it will float.</span>
3 0
3 years ago
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