CHEMISTRY HIGH SCHOOL

A chemist measures 340 grams of sodium acetate. To convert this measurement to kilograms, the chemist should multiply 340 by _.a) 1 kg / 1 g
b) 1000 g / 1 kg
c) 1000 kg / 1000 g
d) 1 kg / 1000 g

Answers

Answer 1
Answer:

Answer:

option d = 1 kg/ 1000 g

Explanation:

Given data:

Mass of sodium acetate = 340 g

Mass of sodium acetate in Kg = ?

Solution:

Gram and kilogram both are units of mass. Kilogram is larger unit while gram is smaller unit. The one kilogram equals to the 1000g. In order to convert the given value into kilogram the value must be multiply with 1 Kg/ 1000g.

340 g × 1 Kg/ 1000g

0.34 Kg

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An Arrhenius base yields which ion as the only negative ion in an aqueous solution?(1) hydride ion (3) hydronium ion
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Answers

An Arrhenius base yields hydroxide ion as the only negative ion in an aqueous solution.

What is an Arrhenius base?

This is defined as a substance which dissociates in water to form hydroxide (OH–) ions.

The hydroxide ion formed from the aqueoussolution is the only negative ion which is why option 4 was chosen.

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Arrhenius bases are substances which produces hydroxide ions in solution. The only negative ion in an aqueous solution is the hydroxide ion. The answer is number 4.

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Answers







a) They are solid at ambient temperatures of 25 ° C and pressure of 1 atm.

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d) When dissolved in water, or pure liquid, carry electrical current due to the existence of ions that move freely and can be attracted by the electrodes, closing the electric circuit.

e) His solvent is water. 

Which of the following occurs when an electron moves from a higher energy shell too a lower energy shell

Answers

A photon is emitted. The energy of the photon is equal to the difference in energy of the two levels.

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True
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Answers

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Answers

The product of an alphadecay of 222/86 Rn is 218/84 Po (option B).

What is an alpha decay?

Alphadecay is a type of radioactive disintegration in which some unstable atomic nuclei dissipate excess energy by spontaneously ejecting an alpha particle.

An alphaparticle is a positively charged nucleus of a helium-4 atom emitted as a result of radioactivity. It has a formula of 4/2 He.

This suggests that when a 222/86 Rn undergoes alphadecay, the product will have mass and atomic number as follows:

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The element with atomic number 84 is Polonium (Po).

Therefore, option B is correct.

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Answers

Answer: 15.0

Explanation:

1) The chemical formula of silver nitrate is AgNO₃

2) The chemical formula of silver chloride is AgCl

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4) Since, there are 15.0 moles of Ag atoms in 15.0 moles of AgNO₃, you conclude, using the 1: 1 ratio, that 15.0 moles of AgCl are produced.
Silver chloride is AgCl, while silver nitrate is AgNO3.  There is the same amount of AgNO3, so the silver from a sample of silver nitrate can produce the same amount of silver chloride.  Therefore, this produces 15.0 moles of silver chloride.
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