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3 years ago

What is the combustibility of matter?

Chemistry

1 answer:

vodomira [7]3 years ago

5 0

Answer:

combustibility is a measure of how easily a substance burst into flame Through Fire or combustion

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Which of the following demonstrates a double-replacement reaction?

Volgvan

A: Na3PO4 + MnCl2 > Mn3(PO4)2 + NaCl

6 0

3 years ago

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How many moles are in 3.4 x 10^-7 molecules of silicon dioxide, SiO2?

avanturin [10]

Answer:

Approximately 5.646 * 10^-17 moles

Explanation:

Avagardo's number is approximately 6.022 * 10^23 molecules. Therefore, dividing 3.4 * 10^7 by avagadro's number yields approximately 5.646 * 10^-17 moles. Hope this helps

7 0

3 years ago

On another planet, the isotopes of titanium have the given natural abundances. Isotope Abundance Mass (amu) 46Ti 72.000% 45.9526

tiny-mole [99]

Answer:

46.784886 amu is the average atomic mass of titanium on that planet.

Explanation:

Fractional abundance of Ti-46 =72.000% = 0.72000

Atomic mass of Ti-46 = 45.95263 amu

Fractional abundance of Ti-48 =14.300% = 0.14300

Atomic mass of Ti-48 = 47.94795 amu

Fractional abundance of Ti-50 =13.700% = 0.13700

Atomic mass of Ti-50 = 49.94479 amu

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Fractional abundance)}_i\times \text{(Atomic mass of an isotopes})_i$

Average atomic mass of titanium atom:

$0.72000\times 45.95263 amu+0.14300\times 47.94795 amu+0.13700\times 49.94479 amu=46.784886 amu$

46.784886 amu is the average atomic mass of titanium on that planet.

3 0

3 years ago

How mamy moles of H2O are equivalent to 97.3 grams of H2O

Ilia_Sergeevich [38]

Explanation:

Number of moles is defined as mass divided by molar mass.

Mathematically, No. of moles = $\frac{mass}{molar mass}$

It is known that molar mass of water ( $H_{2}O$ ) is 18 g/mol and it is given that mass is 97.3 grams.

Hence, calculate the number of moles of water as follows.

No. of moles = $\frac{mass}{molar mass}$

= $\frac{97.3 g}{18 g/mol}$

= 5.40 mol

Thus, we can conclude that there are 5.40 moles of H2O are equivalent to 97.3 grams of H2O.

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3 years ago

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Which term names elements that are usually dull and brittle, and do not conduct electricity? A. gases B. metals C. solids D. non

pickupchik [31]

GASES because they are unseeeable and the electricity cant catch them

8 0

3 years ago

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