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Volgvan
3 years ago
8

Answer me fast!

Chemistry
1 answer:
Ede4ka [16]3 years ago
8 0
Distance and time is needed for determining speed
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A lithium atom starts from rest at a position x = xo and falls toward zinc atom with an acceleration that depends on their separ
rusak2 [61]

Answer:

Please refer to the attachment for answers.

Explanation:

Please refer to the attachment for explanation

3 0
3 years ago
At 2°C, the vapor pressure of pure water is 23.76 mmHg and that of a certain seawater sample is 23.09 mmHg. Assuming that seawat
wariber [46]

Answer:

0.808  M

Explanation:

Using Raoult's Law

\frac{P_s}{Pi}= x_i

where:

P_s = vapor pressure of sea water( solution) = 23.09 mmHg

P_i = vapor pressure of pure water (solute) = 23.76 mmHg

x_i = mole fraction of water

∴

\frac{23.09}{23.76}= x_i

x_i = 0.9718

x_i+x_2=1

x_2 = 1- x_i

x_2 = 1- 0.9718

x_2 = 0.0282

x_i = \frac{n_i}{n_i+n_2}  ------ equation (1)

x_2 = \frac{n_2}{n_i+n_2}  ------ equation (2)

where; (n_2) = number of moles of sea water

(n_i) = number of moles of pure water

equating above equation 1 and 2; we have :

\frac{n_2}{n_i}= \frac{0.0282}{0.9178}

= 0.02901

NOW, Molarity =  \frac{moles of sea water}{mass of pure water }*1000

= \frac{0.02901}{18}*1000

= 0.001616*1000

= 1.616 M

As we assume that the sea water contains only NaCl, if NaCl dissociates to Na⁺ and Cl⁻; we have \frac{1.616}{2} =0.808 M

3 0
3 years ago
Read 2 more answers
Which of the following compounds are held together by ionic bonds? Select all that apply.
Sergeu [11.5K]

Answer:

Explanation:

All of above except carbon dioxide

7 0
3 years ago
A chemical reaction is at equilibrium when:_______.a. the reaction occurs quickly. b. there is no reverse reaction possible, onl
Diano4ka-milaya [45]

Answer: D.

Explanation: A chemical reaction is said to be in a state of equilibrium when the rate of the forward reaction equals the rate of the backward reaction, thus, there is no net change in the concentration of reactants and products.

4 0
3 years ago
How many grams of ethyl alcohol (C2H5OH) are in a 1500 ml solution which is 1.54M?
Sedbober [7]

Answer:

The answer is 1.54molar mass.

7 0
3 years ago
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