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2 years ago

Which subatomic particles have approximately the same mass?

Chemistry

2 answers:

igor_vitrenko [27]2 years ago

8 0

Answer:

The 3rd one is correct

Explanation:

Protons and neutrons have approximately the same mass, about 1.67 × 10−24 grams, which scientists define as one atomic mass unit (amu) or one Dalton. Each electron has a negative charge (−1) equal to the positive charge of a proton (+1). Neutrons are uncharged particles found within the nucleus.

zvonat [6]2 years ago

5 0

Explanation:

protons and neutrons have approximately the same size, the electron is 1847th, (I think), the size of a proton

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True or False? Not all compounds will dissolve in water.

In-s [12.5K]

Answer:

False

Explanation:

Polar molecules and ionic compounds dissolve in water, not nonpolar molecules

4 0

3 years ago

When h forms a bond with h2o to form hydronium ion, h3o , this bond is called a coordinate covalent bond because question 16 opt

pshichka [43]

The correct option would be the fact that both bonding electrons had come from the oxygen to form this chemical bond.

The other options are not true.

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3 years ago

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what is the minimum mass of ethylene glycol that must be dissolved in 14.5 kg of water to prevent the solution from freexing at

lbvjy [14]

Answer:

The minimum mass of ethylene glycol = 6.641 Kg

Explanation:

$\Delta T_f= T_f-T_f'\\T_f'=T_f-\Delta T_f$

Where T_f = freezing point of pure solvent water, 0°C

T_f'= Freezing point of solvent after mixture

K_f = Freezing point depression constant = 1.86 °C/m

Moecular weight of ethylene glycol = 60 g/mol

Weight of ethylene glycol = 14.5 Kg= 14.5×10^3 g

molality of ethylene glycol

$m = \frac{weight}{mol.wt} \times\frac{1000}{V}$

Substitute the values to calculate m

$m = \frac{w}{60} \times\frac{1000}{14.5\times1000}$

by formula

$0-(-14.2) =1.86\frac{w}{60} \times\frac{1000}{14.5\times1000}$

calculating we get w = 6641.93 g

Therefore, The minimum mass of ethylene glycol = 6.641 Kg

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2 years ago

if the solubility of a gas is 7.5 g/L at 404 pressure, what is the solubility of the gas when the pressure is 202 kPa?

shutvik [7]

<span>henry's law :

S</span>₁ / P₁ = x / P₂

7.5 / 404 = x / 202

x = 7.5 * 202 / 404

x = 1515 / 404

x = 3.75 g/L

hope this helps!

7 0

2 years ago

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What is the effect of high activation energy on a chemical reaction?

sweet [91]

D. It makes the reaction harder to start- the need for more activation energy means less successful collisions therefore the reaction can not be started as easily if there were a lower activation energy.

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2 years ago

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