3 years ago

What is a good way to study

Chemistry

1 answer:

SOVA2 [1]3 years ago

7 0

Answer:

focus in class and take your time on work and get good grades

<h2>Explanation:you can do better when you understand what you are doing/learning</h2>

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Sulfur is a nonmetalic mineral that has a density of 2 g/cm3. The volume of a sample of sulfur was measured to be 5.0 cm3. what

taurus [48]

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 2 × 5

We have the final answer as

Hope this helps you

8 0

3 years ago

In which biome do plants grow close to each other and close to the ground in order to resist the cold?

Yakvenalex [24]

Answer:tundra

Explanation:

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3 years ago

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Calculate the number of atoms in 4g of bromine molecule.(Br).

KIM [24]

Answer:

$\\ N=n * N_{A}$

We do not have $n$ - the amount of substance.

$n=\frac{m}{M}\\$

The molecular weight ( $M$ ) of Bromine is 80.

$n=\frac{4}{80} = 0.05 \text{ mol}$

$N = 0.05 * 6.02 * 10^{23} = 0.301 * 10^{23}$

3 0

3 years ago

If 14.5 g of MnO4- (permanganate) react with manganese (II) hydroxide how many grams of manganese (IV) oxide will be produced? T

Veronika [31]

Answer:

$m_{MnO_2}=21.2gMnO_2$

Explanation:

Hello,

In this case, given the balanced reaction:

$2MnO_4^-+2Mn(OH)_2\rightarrow 4MnO_2+2OH^-+H_2O$

We can see a 2:4 mole ration between permanganate ion (118.9 g/mol) and manganese (IV) oxide (86.9 g/mol), that is why the resulting mas of this last one turns out:

$m_{MnO_2}=14.5gMnO_4^-*\frac{1molMnO_4^-}{118.9gMnO_4^-}*\frac{4MnO_2}{2molMnO_4^-} *\frac{86.9gMnO_2}{1molMnO_2} \\\\m_{MnO_2}=21.2gMnO_2$

Best regards.

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4 years ago

Determine the approximate mass of the isotope of carbon in the image.

avanturin [10]

The answer is gonna be D I believe

7 0

3 years ago