3 years ago

SI units is an improved version of MKS system.

Chemistry

1 answer:

Misha Larkins [42]3 years ago

8 0

Answer:

the S.I unit

Explanation:

is the best unite

You might be interested in

Scientist can use the of minerals to tell them apart A.sound B.length C.size D.color

ipn [44]

Answer:

color

Explanation:

Scientists can use the color of minerals to tell them apart.

7 0

3 years ago

An electrical device that slows the flow of charge in a circuit

11Alexandr11 [23.1K]

RESISTOR!!!!!!!!!!!!!!!

7 0

3 years ago

Read 2 more answers

Which type of chemical reaction occurs in Ca+CI2 CaCI2

dimaraw [331]

Ca + Cl2 = CaCl₂

A synthesis <span>reaction.</span>

3 0

4 years ago

How is this model useful?

const2013 [10]

Answer:

A) It shows how electrons are distributed in the Shells of an Iron atom.

Explanation: Took the test on Edge

6 0

3 years ago

A 0.15 m solution of chloroacetic acid has a ph of 1.86. What is the value of ka for this acid?

dem82 [27]

Answer: $1.67\times 10^{-3}$

Explanation:

$ClCH_2COOH\rightarrow ClCH_2COO^-+H^+$

cM 0 0

$c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_a=\frac{(c\alpha)^{2}}{c-c\alpha}$

Given: c = 0.15 M

pH = 1.86

$K_a$ = ?

Putting in the values we get:

Also $pH=-log[H^+]$

$1.86=-log[H^+]$

$[H^+]=0.01$

$[H^+]=c\times \alpha$

$0.01=0.15\times \alpha$

$\alpha=0.06$

As $[H^+]=[ClCH_2COO^-]=0.01$

$K_a=\frac{(0.01)^2}{(0.15-0.15\times 0.06)}$

$K_a=1.67\times 10^{-3]$

Thus the vale of $K_a$ for the acid is $1.67\times 10^{-3}$

4 0

3 years ago