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tino4ka555 [31]
3 years ago
15

What rules should you follow when adding and subtracting ?

Chemistry
2 answers:
wariber [46]3 years ago
5 0
Adding and subtracting with scientific notation may require more care, because the rule for adding and subtracting exponential expressions is that the expressions must havelike terms<span>. Remember that to be </span>like terms<span>, two expressions must have exactly the same base numbers to exactly the same powers. Thinking about decimal arithmetic, the requirement that we have the same powers makes sense, because that guarantees that all of the place values are lined up properly.</span>
german3 years ago
4 0
Negative - Negative = Negative.
Positive - Negative = Positive
Negative - Positive = Negative
Negative + Negative = Negative
Positive + Positive = Positive
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What is the equilibrium constant expression for the ksp of sr3(po4)2?
Eddi Din [679]

The equilibrium constant expression for KSP of Sr3(PO4)2 is


KSP={(Sr^2+)^3 (PO4^3-)^2/ Sr3(PO4)2}


Explanation


write the ionic equation for Sr3(PO4)2


Sr3(PO4)2 → 3Sr^2+ + 2 PO4^3-


KSP is given by (concentration of the products raised to their coefficient /concentration of reactants raised to their coefficient)

7 0
3 years ago
Read 2 more answers
When the temperature goes up, the volume will also go up
Tju [1.3M]

Answer:

Yes it will

An example is ice, when it melts the volume goes up which means it occupies much more space

4 0
3 years ago
Calculate the osmotic pressure (in torr) of 6.00 L of an aqueous 0.958 M solution at 30.°C, if the solute concerned is totally i
cluponka [151]

<u>Answer:</u> The osmotic pressure is 54307.94 Torr.

<u>Explanation:</u>

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

\pi=iCRT

where,

\pi = osmotic pressure of the solution = ?

i = Van't hoff factor = 3

C = concentration of solute = 0.958 M

R = Gas constant = 62.364\text{ L Torr }mol^{-1}K^{-1}

T = temperature of the solution = 30^oC=[30+273]K=303K

Putting values in above equation, we get:

\pi=3\times 0.958mol/L\times 62.364\text{ L. Torr }mol^{-1}K^{-1}\times 303K\\\\\pi=54307.94Torr

Hence, the osmotic pressure is 54307.94 Torr.

7 0
3 years ago
Calculate the percent composition of the following:<br><br> A. VO3<br><br> B. V2O5
tino4ka555 [31]

A) Answer is: 51.48% V and 48.52% O.

Ar(V) = 50.94; atomic weight of vanadium.

Ar(O) = 16; atomic weight of oxygen.

Ar(VO₃) = 50.94 + 3 · 16.

Ar(VO₃) = 98.94; molecular weight of vanadium (VI) oxide.

ω(V) = Ar(V) ÷ Ar(VO₃) · 100%.

ω(V) = 51.48%; the percent composition of vanadium.

ω(O) = 100% - 51.48%.

ω(O) = 48.52%; the percent composition of oxygen.

B) Answer is: 67.80% V and 32.20% O.

Ar(V) = 50.94; atomic weight of vanadium.

Ar(O) = 16; atomic weight of oxygen.

Ar(V₂O₅) = 2 · 50.94 + 5 · 16.

Ar(V₂O₅) = 149.88; molecular weight of vanadium (V) oxide.

ω(V) = 2 · Ar(V) ÷ Ar(V₂O₅) · 100%.

ω(V) = 67.80%; the percent composition of vanadium.

ω(O) = 100% - 67.80%.

ω(O) = 32.20%; the percent composition of oxygen.

4 0
3 years ago
50 POINTS WILL GIVE BRAINLYEST!!!!!!!!!
alina1380 [7]

Answer:

true

Explanation:

Heat travels from the hot cocoa in the cup to your hands. No energy is transferred. Heat is transferred from your hands to the hot cocoa in the cup.

6 0
2 years ago
Read 2 more answers
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