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3 years ago

If the oh is 6.46(10^-9)M what is the pOH

Chemistry

1 answer:

bagirrra123 [75]3 years ago

3 0

Answer: Thus pOH has value of 8.19

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pOH is calculated by taking negative logarithm of hydroxide ion concentration.

$pOH=-\log [OH^-]$

Putting in the values:

$pOH=-\log[6.46\times 10^{-9}]$

$pOH=8.19$

Thus pOH has value of 8.19

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Select the equations below that represent physical changes.

Ierofanga [76]

Physical changes- any change in the physical properties of the substance is a physical change. Generally physical properties include color, state, size , shape, odour, appearance . In any phyical change, no new substance is formed.

Chemical changes- any change in the chemical properties of the substance is a chemical change. Chemical properties changes only when something new is formed during a reaction.

∴ Part A- 2 H2O(l) → 2 H2(g) + O2(g)

In this, H2 and O2 is produced during the reaction which is different from H20. Thus, it is a chemical change.

Part B- H2O(l) → H2O(s)

In this, only the state of water changes from liquid to solid and no new product is formed. Thus, it is a physical change.

Part C-CO2(s) → CO2(g)

In this also, only the state of CO2 changes from solid to gas and no new product is formed. Thus, it is a physical change.

Part D-H2(g) → 2 H(g)

In this reaction, H2 molecule is dissociated into 2 hydrogen atom leading to formation of new products. Thus, it is a chemical change.

Finally, equations that represent physical changes are - B and C

B. H2O(l) → H2O(s)

C. CO2(s) → CO2(g)

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3 years ago

Gold can undergo transmutation. Which equation could correctly describe this radioactive decay?

drek231 [11]

The answer is B i know this because i just took it

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3 years ago

Read 2 more answers

What was done to the linear parent function, f(x) = x, to get the function g(x) = 1/6 x

s2008m [1.1K]

Answer:

Vertically Shrunk by a factor of 1/6

Explanation:

Parent Formula: f(x) = a(bx - c) + d

a - vertical shrink/stretch and x-reflections

b - horizontal shrink/stretch and y-reflections

c - horizontal movement left/right

d - vertical movement up/down

Since we are only modifying a, we are dealing with vertical shrink/stretch:

Since a < 1 (1/6 < 1), we are dealing with a vertical shrink of 1/6.

Since a > 0 (1/6 > 0), we do not have a reflection over the x-axis.

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3 years ago

How many protons are in Lithium-8 *

DaniilM [7]

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3 years ago

The silver nitrate in 20.00 mL of a certain solution was allowed to react with sodium chloride according to the following equati

valentinak56 [21]

Answer:

The answer to your question is: 0.1 M

Explanation:

data

Volume of AgNO3 = 20.00 ml

1000 ml -------------- 1 l

20 ml --------------- x

x = 20x 1 /1000 = 0.02

AgCl = 0.2867 g

MW of AgCl = 35.45 + 107.9 = 143.35 g

143.35 g -------------- 1 mol

0.2867 g ------------- x

x = 0.2867 x 1 / 143.35 = 0.002 moles of AgCl

From the balance reaction we see that the proportion of AgNO3 to AgCl is 1:1, then

1 mol of AgNO3 -------------------- 1 mol of AgCL

x --------------------- 0.002 moles of AgCl

x = 0.002 moles of AgNO3

This moles of AgNO3 are in 20 ml or 0.02 liters

So, Molarity = # moles/liter

Molarity = 0.002 moles/ 0.02 = 0.1 M

4 0

3 years ago