Why does the flow of science just keep going

Answers

Answer 1

Answer:

Answer:

The Flow of science keeps going because not everything is fully discovered yet. New things are discovered everyday and are also made better as well.

Explanation:

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Hydrogen peroxide decomposes to give water and oxygen gas according to the equation below. If 3.0 moles of hydrogen peroxide decompose, what volume of oxygen gas is produced at a pressure of 1.0 atm and a temperature of 23 °C? 2 H2O2(l) → 2 H2O(l) + O2(g)
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Why graphite can rub off the pencil onto the paper

Answers

Graphite is an extremely soft material and is formed in layers as well.This combination of traits allows for the graphite to scrape off of the pencil tip and onto the paper.

How much CaCl2, in grams, is needed to make 2.0 L of a 3.5M solution?

Answers

find the number of moles: 2•3.5=7 moles

and do dimensional analysis. to convert moles of solution to moles of cacl2 and moles of cacl2 to grams of cacl2 (molar mass)

Why does a reaction slow down with time?

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As a reaction proceeds the concentration of the reactants will get lower. Since reactions occur due to collisions that are in the correct orientation and lower concentrations leads to a lower amount of collisions, lower concentrations result in lower reaction rates. I hope this helps. Let me know if anything is unclear.

The relatively high boiling point of water is due to water having(1) hydrogen bonding
(2) metallic bonding
(3) nonpolar covalent bonding
(4) strong ionic bonding

Answers

The correct answer is option 1. Water has a relatively high boiling point due to the presence of hydrogen bonding between atoms. Hydrogen bonding is said to be the most powerful or strongest intermolecular force as compared to others therefore it has a higher boiling point because higher energy is needed to break this bond.

1. How many ATOMS of boron are present in 2.20 moles of boron trifluoride ? atoms of boron. 2. How many MOLES of fluorine are present in 5.35*1022 molecules of boron trifluoride ? moles of fluorine.

Answers

Answer:

1. How many ATOMS of boron are present in 2.20 moles of boron trifluoride? atoms of boron.

2. How many MOLES of fluorine are present in of boron trifluoride? moles of fluorine.

Explanation:

The molecular formula of boron trifluoride is $BF_3$ .

So, one mole of boron trifluoride has one mole of boron atoms.

1. The number of boron atoms in 2.20 moles of boron trifluoride is 2.20 moles.

The number of atoms in 2.20 moles of boron is:

One mole of boron has ---- $6.023x10^2^3$ atoms.

Then, 2.20 moles of boron has

- $=2.20 mol. x 6.023 x 10^2^3 atoms /1 mol\n=13.25x10^2^3 atoms$

2. Calculate the number of moles of BF3 in 5.35*1022 molecules.

$(5.35x10^2^2 molecules/6.023x10^2^3)x 1mol\n=0.0888mol$

One mole of boron trifluoride has three moles of fluorine atoms.

Hence, 0.0888moles of BF3 has 3x0.0888mol of fluorine atoms.

=0.266mol of fluorine atoms.

the empirical formula of a compound is NO2. it's molecular mass is 92g/mol. What is its molecular formula?

Answers

The molecular formula:
$N_x(O_2)_x$

$M_(N_x(O_2)_x)=x * M_N + x * 2 * M_O \n \nm_N=14 \ (g)/(mol) \nm_O=16 \ (g)/(mol) \n M_(N_x(O_2)_x)=92 \ (g)/(mol) \n \n92=x * 14+x * 2 * 16 \n92=14x+32x \n92=46x \n(92)/(46)=x \nx=2 \n \nN_2(O_2)_2 \Rightarrow N_2O_4$

The molecular formula is N₂O₄.

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