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Lady_Fox [76]
3 years ago
12

What are 2 indications that a chemical change has occurred?

Chemistry
1 answer:
irakobra [83]3 years ago
8 0

Answer:  The color has changed or the formation of light and heat. Also, the temprature will change as well.

Explanation:

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What is ppm?
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What does ppm mean? This is an abbreviation for "parts per million" and it also can be expressed as milligrams per liter (mg/L). This measurement is the mass of a chemical or contaminate per unit volume of water. Seeing ppm or mg/L on a lab report means the same thing.

that is all i have to say.

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3 years ago
Important of thermometer​
Mama L [17]

Answer:

to see if something or someone has either a low or high temperature

Explanation:

because you wanna know if some has a fever so you dont get the coronna virus

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The word igneous comes from the Latin word for fire. However, the name is inaccurate. The rocks are not created with flames. Ins
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Instead, they are created when magma cools and hardens —> the temperature contributes as the magma would be at extreme heat while it need a cooler temperature to harden and mold
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3 years ago
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How much 6.0M HNO(small 3) is needed to neutralize 39mL of 2 M KOH
Digiron [165]
Equation of reaction 
<span>KOH+HNO3--->KNO3+H2O </span>
<span>CA=6.0M, CB=2.0M, VA=?, VB=39ml, na=1, nb=1 </span>
<span>CAVA/CBVB=na/nb </span>
<span>6*VA/2*39=1/1 </span>
<span>6VA/78=1 </span>
<span>6VA=78 </span>
<span>VA=78/6. VA=13ml. </span>
<span>VA=13ml.</span><span>
Hope this helped!!!!! </span>Don't forget Brainliest!!!!! You can always PM me if you don't want to waste any points!!!!!
8 0
3 years ago
Can someone assist me with this chemistry question please?​
telo118 [61]

Answer:

490 J.

Explanation:

The following data were obtained from the question:

Mass (m) = 5 Kg

Height (h) = 10 m

Acceleration due to gravity (g) = 9.8 m/s²

Potential energy (P.E) =..?

Potential energy is the energy stored in a body by virtue of its location. Mathematically, it can be expressed as:

P.E = mgh

Where:

m is the mass of the object measured in kilograms (Kg).

g is the acceleration due to gravity and the value is 9.8 m/s².

h is the height to which the object is located measured in metre (m)

P.E is the potential energy measured in joule (J).

With the above formula, we can obtain the potential energy possed by the object as follow:

P.E = mgh

P.E = 5 x 9.8 x 10

P.E = 490 J

The,the potential energy possed by the object is 490 J

5 0
3 years ago
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