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marshall27 [118]
3 years ago
8

Plzz write a small pharghraph

Chemistry
2 answers:
Nikolay [14]3 years ago
7 0
At first glance, the final mass does not follow the Law of Conservation of Mass because, according to the law, the final mass should be 75g. This comparison likely occurred because stirring the flask created bubbles, suggesting that one product of the reaction is a gas. The Law of Conservation of Mass states that the mass of the reactants must equal the mass of the products. One product happened to be gas that escaped through the opening of the flask, meaning that the results were not completely accurate and do not break the law. One change to make to the experiment would be to seal the flask closed after adding both reactants to ensure that gas doesn’t escape.
bija089 [108]3 years ago
4 0
You should download Socratic it’s a real good app for answers !
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An insulated piston-cylinder device contains 1 L of saturated liquid water at pressure of 150 kPa. An electric resistance heater
miskamm [114]

Answer:

Explanation:

In this problem,

we will determine the enthalpy at the end of heat input and we get the condition is the super heated state.

so the entropy change will be due to latent heat at 150 kPa and also due to temperature change at the super heated state.

All the temperature, enthalpy is evaluated with the help of the steam table.

mass is calculated with the help of a specific volume at initial condition.

<u>see image below</u>

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3 years ago
If the pressure on gaseous reactant is increased, the rate of reaction is increased because there is an increase in the
mixer [17]

Answer:

collisions between molecules

8 0
3 years ago
Is this molecule polar? NaS
Anuta_ua [19.1K]

Answer:

NaS is ionic compounds that's why it is polar.

Explanation:

Ionic bond:

It is the bond which is formed by the transfer of electron from one atom to the atom of another element.  

Both bonded atoms have very large electronegativity difference. The atom with large electronegativity value accept the electron from other with smaller value of electronegativity.

For example:

Sodium sulfide is ionic compound. The electronegativity of sulfur is 2.58 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the sulfur. Sodium becomes positive and sulfur becomes negative ion.  There are electrostatic  fores present between bonded atoms and molecule becomes polar.

8 0
4 years ago
How many planar and radial nodes are there in a 3p orbital?
KATRIN_1 [288]
A 3p orbital has one planar node perpendicular to the orbital's axis, and one radial node.
8 0
4 years ago
You wish to calculate the mass of hydrogen gas that can be prepared from 5.06 g of srh2 and 4.34 g of h2o.
Alexus [3.1K]
<span>0.228 g The balance formula for the reaction between SrH2 and H2O is SrH2(s) + 2 H2O(l) ==> Sr(OH)2(s) + 2 H2(g) So for every mole of SrH2 used, 2 moles of hydrogen gas, or 4 moles of hydrogen atoms are released. So let's calculate the molar mass of SrH2 and H2O so see what the limiting reactant is. strontium = 87.62 Hydrogen = 1.00794 Oxygen = 15.999 Molar mass of SrH2 = 87.62 + 2 * 1.00794 = 89.63588 g/mol Molar mass of H2O = 2 * 1.00794 + 15.999 = 18.01488 g/mol Moles of SrH2 = 5.06 g / 89.63588 g/mol = 0.056450609 mol Moles of H2O = 4.34 g / 18.01488 g/mol = 0.240911957 mol Looking at the balanced formula, for every mole of SrH2, it takes 2 moles of H2O. So the limiting reactant will be the SrH2. And for every mole of SrH2 used, we get 4 moles of hydrogen atoms. So 4 * 0.056450609 mole * 1.00794 g/mole = 0.227595307 g Since we only have 3 significant figures, round the result to 3 figures, giving 0.228 g</span>
5 0
4 years ago
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