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gavmur [86]
2 years ago
8

Mn(NO3)2(aq)+2KOH(aq) MN(OH)2(s)+2KNO3(aq)

Chemistry
2 answers:
oee [108]2 years ago
6 0
My name is Jeff alaxender prince the third
valkas [14]2 years ago
3 0
ANSWER:

Step by step explanation:
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Put the following into correct SciNot: 312.5 x 10^20.<br><br>1 point<br><br>Your answer<br><br><br>​
lions [1.4K]
Ans= 3.125*10^22

Solution:
312.5 * 10^20
=3.125 * 10^2 * 10^20
= 3.125 * 10^2+20
= 3.125 *10^22,,
7 0
3 years ago
Which term is defined as the change in the direction of light when it goes from one medium into a different medium?
vovikov84 [41]
The term defined as the change in direction of light when it goes from one medium into a different medium is refraction.

Refraction is the change of direction on the propagation of a beam of light when it passes from a medium to other; this only happens when the light travels at different speeds in both media.

When a beam of light that travels in the air incedes in a slab of glass, part of the beam is reflected (bounces) and part is refracted (it penetrates in the glass and changes the angle).


Also,due to the different speeds of light in air and water, when a beam of light passes from air to water, it refracts.
 
7 0
2 years ago
Which of the following is NOT an
skelet666 [1.2K]
The answer is C. Light because light is a form of energy
8 0
3 years ago
Read 2 more answers
Convert: 950 g to kg
scZoUnD [109]

Answer:your answer is 0.95

Explanation:

Because you put the number down if it is in the hundreds then put into a decimal that it is in the hundredths:)

4 0
2 years ago
What is the mass sample of 0.0500 moles of zinc chloride ?
vlabodo [156]

Answer:

6.82g

0.59moles

Explanation:

1. What is the mass sample of 0.0500 moles of zinc chloride ?

Given parameters:

Number of moles ZnCl₂ = 0.05moles

Unknown:

Mass of the sample  =  ?

Solution:

To find the mass of a substance using the number of moles, it would be pertinent to understand what mole is.

A mole is a substance that contains the avogadro's number of particles.

It relates to the mass using the expression below;

                Mass of a substance  = number of moles x molar mass

Molar mass of  ZnCl₂;

        Atomic mass of Zn  = 65.4g/mol

                                   Cl = 35.5g/mol

Molar mass = 65.4 + 2(35.5)  = 136.4g/mole

Mass of a substance  = 0.05 x 136.4  = 6.82g

2. How many moles of potassium sulfide are in a 65.50g sample?

Given parameters:

Mass of K₂S  = 65.5g

Unknown:

Number of moles  = ?

Solution:

The number of moles of any substance is related to mass using the expression below;

              Number of moles  = \frac{mass}{molar mass}

Molar mass of K₂S  = 2(39) + 32  = 110g/mol

              Number of moles  = \frac{65.5}{110}   = 0.59moles

8 0
3 years ago
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