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asambeis [7]
2 years ago
15

Observations are made by using one of the five senses (touch, sight, taste, smell, hearing) to gather information.

Chemistry
2 answers:
sergejj [24]2 years ago
5 0
B. The rock is purple.
svp [43]2 years ago
4 0

answer B the rock is purple

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2) The pH of 1x10-1M (HNO3) solution is:<br><br> A)1<br> B) 1.3<br> C)5<br> D)2
nikdorinn [45]

Concentration of H+ ions in HNO3 solution is 10⁻¹ which is equal to 0.1 M

\bf  \: pH \:  =  - log[{h}^{ + }]

putting the value we get

\sf \dashrightarrow  \: pH \:  =  - log \: [ \frac{1}{10}] \\  \\ \sf \dashrightarrow  \: pH \: =   - log \: {10}^{ - 1}  \\  \\ \sf \dashrightarrow  \: pH \: = 1

So, the required option is A) 1

8 0
2 years ago
What is the molarity of 500 ml of a solution containing 85.0g AgNO3? A) 0.5 M B) 1.0 M C) 2.0 M D) 5.0 M
kari74 [83]

Consider the equation for calculating molarity: (no. of mole of solute)÷(volume of solution)

First, let's find the no. of mole of solute in AgNO3. As (no. of mole) = mass / molar mass

no. of mole of 85.0g of AgNO3 = 85.0/(107.9+14.0+16.0x3)

=0.5mol

Since the volume of the solution has to be in dm3, just divide the volume in cm3 by 1000 to get the volume in dm3.

Volume of solution = 500/1000

= 0.5 dm3

Therefore, the molarity is

0.5/0.5

=1.0M

The answer should be B.

3 0
3 years ago
Which is the answer please help
djyliett [7]

Answer:

The outermost energy shell of an atom likes to be full with 8 electons

Explanation:

4 0
3 years ago
Read 2 more answers
Dorothy left a frozen juice pop out on the counter. When she returned, the juice pop had melted into a liquid. Which of the foll
Brums [2.3K]

Answer:

B) The molecules were closer together when the juice pop was frozen.

8 0
3 years ago
What is Keq for the reaction N₂ + 3H2 = 2NH3 if the equilibrium
hram777 [196]

The Keq for the reaction N₂ + 3H2 = 2NH3 if the equilibrium concentrations are Keq = 1.5. The correct option is D.

<h3>What is Keq?</h3>

Keq is the ratio of the concentration of reactant to the concentration of the product.

The balanced equation is

N₂ + 3H₂  = 2NH₃

The equilibrium constant is \rm \dfrac{[NH_3]^2}{[N_2]\; [H_2]^3}

The given concentrations of the compounds have been:

Ammonia = 3 M

Nitrogen = 1 M

Hydrogen = 2 M

\rm \dfrac{9}{1\times 8} = 1.5

Thus, the correct option is D. Keq = 1.5.

Learn more about Keq

brainly.com/question/24059926

#SPJ1

3 0
2 years ago
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