Some studies have found that when a person mimics an angry expression, their temperature actually rises.

What ionic compounds have +2 ions and -3 charge

Vinil7 [7]

Answer:

sodium chloride NaCl

Explanation:

7 0

3 years ago

If 44.7 g of KCI (MM = 74.55 g/mol) are added to a 500.0 mL volumetric flask, and water is added to fill the flask, what is the

navik [9.2K]

1.199 M is the concentration of KCI in the resulting solution.

<h3 /><h3>What are moles?</h3>

A mole is defined as 6.02214076 × $10^{23}$ of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

No.of moles of KCI

$Moles = \frac{mass}{molar \;mass}$

$Moles = \frac{44.7 g}{74.5513 g/mol}$

= 0.599 moles

Vol.of the solution,V= 500 ml

= 0.5 liter

Molarity

$Molality = \frac{Moles \;solute}{Volume \;of \;solution \;in \;litre}$

$Molality = \frac{0.599 moles}{0.5 liter}$

= 1.199 M

Hence, 1.199 M is the concentration of KCI in the resulting solution.

Learn more about moles here:

brainly.com/question/8455949

#SPJ1

6 0

3 years ago

How many protons are in each of the following

Nookie1986 [14]

carbon has 6 protons and hydrogen has 1 proton

6 0

3 years ago

How many different types of aminoacyl trna synthetases are there?

tensa zangetsu [6.8K]

Answer:

there are 20 different types of aminoacyl trna synthetases

Explanation:

aminoacyl trna synthetases also called trna ligase, is an enzyme that attaches the appropriate amino acid onto its tRNA.

in humans, the 20 different types of aa-tRNA are made by the 20 different aminoacyl-tRNA synthetases, one for each amino acids of the genetic code.

7 0

3 years ago

Match each term with its definition. The position of an equilibrium always shifts in such a direction as to relieve a stress app

Lina20 [59]

Answer:

The position of an equilibrium always shifts in such a direction as to relieve a stress applied to the system. - Le Chatelier's principle

A molecule that donates a proton when it encounters a proton acceptor. - Bronsted-Lowry acid

Occurs when a reaction involving an acid and its conjugate base is combined with a second reaction involving a base and its conjugate acid. - Neutralization

It ionizes completely when dissolved in water. - Strong acid

The shift in the position of equilibrium caused by the addition of a participating ion. - Common ion effect

It only partially ionizes when dissolved in water. - Weak electrolyte

It is capable of acting as either an acid or a base depending upon the solute. - Amphoteric solvent

The act of self-ionization of a solvent to produce both a conjugate acid and a conjugate base. - autoprotolysis

A chemical species that bears both positive and negative charges. - zwitter ion

7 0

3 years ago