What is the molecular shape of compound pl3 based on lewis structure

Answers

Answer 1

Answer: Your answer to this question is a Trigonal pyramidal

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Perform the following calculations. Express the answers with the correct number of significant figures.a) 7 g - 3.5 g - 2.75 g =

b) 200.00 kg - 199.0 kg =

c) 25 L - 3.0 L =

d) 0.67 cm + 2.0 cm + 0.090 cm =

e) 104.5 g + 0.40 g =

Answers

The answer will be 0.75 gram, 1 kilo-gram, 22 L, 2.76 cm, and 104.9 gram.

What is gram?

A metric unit with mass and weight equal to approximately 15.432 grains, or one-thousandth of a kilo-gram, is called a gram.

Calculation of given question.

a) 7 gram - 3.5 gram - 2.75 gram = 0.75 gram

b) 200.00 kg - 199.0 kg = 1 kilo-gram

c) 25 L - 3.0 L = 22 L

d) 0.67 cm + 2.0 cm + 0.090 cm = 2.76 cm

e) 104.5 g + 0.40 g = 104.9 gram

To know more about gram

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Since there are no conversions to be done just add them as is
a) 1 g
b) 1.0 kg
c) 22 L
d) 3.6 cm
e) 104.9 g

Which of the following compounds, when added to water, is most likely to increase the solubility of HgS?A. KNO3
B. Na2SO4
C. KCl

Answers

Answer:

B. $Na_2SO_4$

Explanation:

Hello,

The solubility of HgS is increased by adding $Na_2SO_4$ due to common ion effect which consists on the effect that the higher solubility of $Na_2SO_4$ has over the HgS as the sulfur-based ions modify the solubility product. In such a way, by adding the sulfate, the equilibrium will be shifted rightwards, therefore the solubility is increased.

Best regards.

C. KCl- That is the answer for sure, but I dont want to explain

Is the following chemical equation balanced?

2Na + 2H2O 2NaOH + H2

Answers

Answer: YES

Explanation: The given chemical equation can be balanced by balancing the stiochiometric number of each and every element.

This rule is in accordance with the Law of Conservation of Masses which states that the masses of the elements in any chemical equation are constant at any instant of time.

Thus the given equation can be written as

$2Na + 2H2O \rightleftharpoons 2NaOH + H2$

sure !

equation balanced:

2 Na + 2 H₂O = 2 NaOH + H₂ ( single replacement )

hope this helps!

A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to –3.5°C. If there is no volume change in the tire, what is the pressure after the temperature change?

Answers

Using ideal gas equation, PV = nRT, and since there is no volume change and amount change, the equation is now P = kT, where k =nR/V. Temperature must be in kelvin From the given, k = (0.82)/ (21 + 273) = 2.78 x 10^-3 Substituting T = -3.5+273, P = 0.75 atm

it would be 0.75 atm

In which type of reaction do two lighter nuclei combine to form one heavier nucleus?(1) combustion (3) nuclear fission
(2) reduction (4) nuclear fusion

Answers

Answer:

Nuclear Fusion

Explanation:

In nuclear fusion two lighter nuclei combine together in order to form one heavier nucleus.

For example, the energy generated from the Sun is made by nuclear fusion: Two hydrogen (H, atomic number 1) nuclei combine in order to form one helium (He, atomic number 2) nucleus.

Nuclear fission is the opposite reaction, in which one heavier nucleus splits into two lighter nuclei.

In this equation, what should be the coefficients of the reactants and products? I2 + O2 → I4O9

Answers

I am thinking that you are asking for the balanced equation for this chemical reaction. In order to balance this, you have to count each element where the elements in the reactants side and the product side should have equal number of molecules. The balanced reaction is as follows:

2I2 + 9/2O2 → I4O9

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