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SIZIF [17.4K]
3 years ago
5

Caitlin told Teddy that she heard that the largest diamond was found yesterday in Africa. What would be the best source of resea

rch for Teddy to confirm Caitlin's claim? Caitlin's parents the Internet an encyclopedia at the library last month's science magazine
Chemistry
1 answer:
ozzi3 years ago
5 0
Would it be on the news

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In one sentence, explain how the particles of a substance change as a substance changes from a solid to a liquid to a gas.
mestny [16]

Answer:

An example would be ice.

Explanation:

Because ice starts off as a solid and then when it melts from heat turns into a liquid and then if heated can to into a gas.

5 0
3 years ago
g How many moles of NaOH are present in a sample if it is titrated to its equivalence point with 44.02 mL of 0.0885 M H2SO4? 2Na
Lisa [10]

Answer:

n_{base}=3.90x10^{-3}molNaOH

Explanation:

Hello!

In this case, since the sulfuric acid and sodium hydroxide react in a 1:2 mole ratio, given the reaction, we realize they have the following mole ratio at the equivalence point:

2*n_{acid}=n_{base}

Which in terms of concentrations and volumes is:

2*M_{acid}V_{acid}=n_{base}

Thus, we can plug in the volume and concentration of acid to find the moles of base:

n_{base}=0.04402L*0.0885\frac{mol}{L} \\\\n_{base}=3.90x10^{-3}molNaOH

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8 0
3 years ago
A 4.000 g sample of an unknown metal, M, was completely burned in excess O2 to yield 0.02225 mol of the metal oxide, M2O3. What
Solnce55 [7]
4X + 3O₂ = 2X₂O₃

n(X₂O₃)=0.02225 mol
m(X)=4.000 g
x - the molar mass of metal

m(X)/4x=n(X₂O₃)/2

x=m(X)/{2n(X₂O₃)}

x=4.000/{2*0.02225)=89.89 g/mol

X=Y (yttrium)



7 0
4 years ago
An increase in blood CO2 or a decrease in blood ph will lead to which change in respiration?
Galina-37 [17]
Respiratory acidosis
5 0
2 years ago
Need answer asap .. <br> -20 points! asap please ..
olga_2 [115]

Answer:

[tex]\purple{\rule{45pt}{7pt}}\purple{\rule{45pt}{999999pt}}[tex]

Explanation:

[tex]\purple{\rule{45pt}{7pt}}\purple{\rule{45pt}{999999pt}}[tex]

6 0
2 years ago
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