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3 years ago

Question Number 6 of 10 - 8th Grade Science

Chemistry

1 answer:

JulijaS [17]3 years ago

3 0

Answer:

Most likely burning coal produces silver dioxide with can cause acid rain

Explanation:

Only one answer comes with a negative consequence. All the others are either

1. Explaining the benefits of coal, such as it producing more heat

2. Stating that there is more coal than any other natural resource

3. Coal being more convenient

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Elemento arqueologico para determinar la antiguedad de los restos fósiles

gayaneshka [121]

Answer:

La datación potasio-argón o 40K/40Ar es un método de datación radiométrica, surgido en la década de 1960, utilizado en geología y arqueología para datar rocas o cenizas volcánicas

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3 years ago

In chemistry lab student is determining the salinity of seawater using a conductivity meter. The student made standards of NaCl

dimaraw [331]

Answer:

a. is an excel document. i uploaded as an attachment

b. concentration = 0.327

Explanation:

in the graph i uploaded for answer a, the x variable is conductivity, while the y variable is % salinity.

the calculated regression line was calculated using excel =

y = 0.057655X - 0.00891

for answer part b,

we take x = 5.82

when we put this into the y formular

y = 0.057655(5.82) - 0.00891

y = 0.3355521 - 0.00891

y = 0.3266421

this is ≈ 0.327

in conclusion, using the standard curve, the concentration of unknown salt is 0.327. the % salinity = 0.327

6 0

3 years ago

Why dose a small container have more pressure than a large container of both have the same amount of gas in them

Volgvan

Because in a smaller container, there is less room for the gas to exist. the gas much all push together closer to fit in the smaller container. as gas atoms, they have less room to bounce around. in a bigger container, it has more room to more and is less pressurized

4 0

3 years ago

A large mass of moving ice and sown on land that covers much of continent or large island

Sliva [168]

I'm guessing Continental Glacier?

3 0

3 years ago

Calculate the following quantity: volume of 1.403 M copper(II) nitrate that must be diluted with water to prepare 575.2 mL of a

Juliette [100K]

Answer:

328 ml

Explanation:

We have given final volume =575.2 ml=0.575 L

Final concentration = 0.8012 M

We know that moles of copper(II) nitrate = final volume ×final concentration =0.8012×.0575=0.4606 moles

We have to find initial volume

So initial volume $=\frac{moles\ of \ copper(II)\ nitrate}{initial\ concentration}=\frac{0.4606}{1.403}=0.328L=328ml$

6 0

4 years ago