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murzikaleks [220]
3 years ago
9

If you burn 42.5 g of hydrogen and produce 3.80 × 102 g of water, how much oxygen reacted?

Chemistry
1 answer:
timofeeve [1]3 years ago
6 0
It is probably 387.6.that should be the answer
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PLEASE HELP MEEEE<br> Africa<br><br> Asia (India)<br><br> Australia<br><br> Europe
stellarik [79]

Answer:

Australia is correct

Explanation:

Because it is not attached to any other place

3 0
3 years ago
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This type of intermolecular force occurs when two molecules attract due to their electron density shifting to create opposite sh
alexdok [17]

Answer:

London dispersion forces

Explanation:

The London dispersion force is the weakest kind of intermolecular force. The London dispersion force is a temporary attractive force that occurs when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. This force is sometimes called an induced dipole-induced dipole attraction.

These London dispersion forces are mostly seen in the halogens (e.g., Cl2 and I2), the noble gases (e.g., Xe and Ar), and in many non-polar molecules, such as carbon dioxide and propane. London dispersion forces are part of the van der Waals forces, and are very weak intermolecular attractions.

3 0
3 years ago
An acid has an acid dissociation constant of 2.8x10^-9. What is the base dissociation constant of its conjugate base?
jok3333 [9.3K]
PH=-lg[H⁺]
pH=-lg(2.8×10⁻⁹)=8.553

pOH=14-pH
pOH=14-8.553=5.447

[OH⁻]=10^(-pOH)
[OH⁻]=10⁻⁵·⁴⁴⁷=3.6×10⁻⁶
3 0
3 years ago
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An aqueous solution is 0.467 m in hcl. what is the molality of the solution if the density is 1.23 g/ml?
Reika [66]
Answer:
molarity = 0.385 moles/kg

Explanation:
Assume that the volume of the aqueous solution given is 1 liter = 1000 ml
Now, density can be calculated using the following rule:
density = mass / volume
Therefore:
mass = density * volume = 1.23 * 1000 = 1230 grams
Now, 0.467 m/L * 1L = 0.467 moles of HCl
We will get the mass of the 0.467 moles of HCl as follows:
mass = molar mass * number of moles = (1+35.5)*0.467 = 17.0455 grams
Now, we have the mass of the solution (water + HCl) calculated as 1230 grams and the mass of the HCl calculated as 17.0455 grams. We can use this information to get the mass of water as follows:
mass of water = 1230 - 17.0455 = 1212.9545 grams
Finally, we will get the molarity as follows:
molarity = number of moles of solute / kg of solution
molarity = (0.467) / (1212.9594*10^-3)
molarity = 0.385 mole/kg 

Hope this helps :)

5 0
3 years ago
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How would you make up 100 mL of a 0.10 M NaCl solution?
KIM [24]
0.01 moles NaCl into 0.1 Liter solution
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