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yaroslaw [1]
3 years ago
9

How do you give someone branily if only one person answered

Chemistry
2 answers:
Alex777 [14]3 years ago
8 0

Answer:

U cant thats the thing

Explanation:

Theres gotta be more than 1 person :)

neonofarm [45]3 years ago
3 0

Answer:

You have to wait until two people answer.

Explanation:

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Help! What did I do wrong??
iogann1982 [59]

The molecules  of hydrogen gas that are  formed is  when 48.7 g  of sodium are added to water  is  6.375  x 10²³  molecules


  <u><em>calculation</em></u>

2 Na +2H₂O →  2 NaOH  +H₂

Step 1: find the moles  of sodium (Na)

moles =mass÷   molar mass

from periodic table the molar mass of Na = 23 g/mol

moles= 48.7 g÷ 23 g/mol =2.117 moles

Step 2:use the mole ratio to determine  the  moles of H₂

  from  given equation  Na:H₂ is 2:1

therefore the moles  of H₂ = 2.117 moles x 1/2=1.059 moles

Step 3: find the molecules of H₂ using the Avogadro's law

According  to  Avogadro's  law  1 mole = 6.02 x 10²³ molecules

                                                      1.059 moles = ?  molecules

by cross multiplication

= [(1.059 moles x 6.02 x10²³  molecules) /  1 mole] =6.375  x 10²³  molecules

4 0
3 years ago
Determine the boiling point of water at 620 mm Hg?
AfilCa [17]
For example, at sea level the atmospheric pressure is 760 mm Hg<span> (also expressed as 760 torr, 101325 Pa, 101.3 kPa, 1013.25 mbar or 14.696 psi) and pure </span>water<span> boils at 100°C. However, in Calgary (approx. 1050m above sea level) the atmospheric pressure is approximately 670 </span>mm Hg<span>, and </span>water<span> boils at about 96.6°C.</span>
7 0
3 years ago
Read 2 more answers
Liquid A is known to have a lower surface tension and lower viscosity than Liquid B. Use these facts to predict the result of be
Korvikt [17]

Answer: Option (B) is the correct answer.

Explanation:

Surface tension is defined as the attractive forces experienced by the surface molecules of a liquid by the molecules present beneath the surface layer of the liquid.

And, viscosity is defined as the ability of a liquid to resist its flow. When a substance has high viscosity then it is known as a viscous substance.

Since, it is given that viscosity of liquid B is more than liquid A. Therefore, liquid B has more resistive force on its surface as compared to liquid A. As a result, time taken by liquid B is more than time taken by liquid A.

Also,    Surface tension = \frac{Force}{Length}

Surface tension of liquid B is more than liquid A. Therefore, F_{B} > F_{A}.

Thus, we can conclude that tA will be less than tB.

8 0
3 years ago
Consider the following system at equilibrium where H° = 16.1 kJ, and Kc = 6.50×10-3, at 298 K. 2NOBr(g) 2NO(g) + Br2(g)If the VO
Norma-Jean [14]

Answer:

1) The value of Kc : (C.) remains the same

2) The value of Qc : (A.) is greater than Kc

3) The reaction must : (B.) run in the reverse direction to reestablish equilibrium.

4) The number of moles of Br2 will : (B.) decrease

Explanation:

Value of concentration equilibrium constant Kc depends only on temperature. Since temperature remains constant, therefore, Kc remains constant.  Decrease in volume means increase in pressure. Increase in pressure favors the side with less gaseous species.  Hence, increase in pressure will favor the reverse reaction towards reactants.

7 0
3 years ago
How did Fizeau prove or disprove Galileo’s findings?
Elis [28]

Answer:

It is commonly believed that the Catholic Church persecuted Galileo for abandoning ... Thus Galileo did not prove the theory by the Aristotelian standards of science in his day. ... If we believe Relativity, science never *can* disprove them. ... If you correctly report the findings of Fr. Spitzer, then he is wrong.

Explanation:

oof

6 0
3 years ago
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