3 years ago

Is mass conserved when you burn wood?

Chemistry

1 answer:

Alex_Xolod [135]3 years ago

7 0

No it is not conserved

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What is the concentration of a solution which is 2g in 150cm3 in g/dm3

Irina-Kira [14]

Answer:

13.33 g/dm³

Explanation:

Concentration (g/dm³)= mass(g) ÷ volume (dm³)

Now you need to convert 150 cm³ to dm³

1000cm³ = 1 dm³

thus, 150 cm3= 150 ÷ 1000

= 15dm³

and you already have mass in grams

so concentration = 2 ÷ 0.15

= 13.33 g/dm³ and there you go.. solved ;)

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2 years ago

What is the mass of a magnesium block that measures 2.00 cm

skad [1K]

Answer:

m = 31.284 grams

Explanation:

Given that,

The dimension of a magnesium block is 2.00 cm x 3.00 cm x 3.00 cm.

The density of magnesium is, d = 1.738 g/cm³

We need to find the mass of the magnesium block. We know that the density of an object is given by its mass per unit its volume. So,

$d=\dfrac{m}{V}\\\\\text{Where m=mass}\\\\m=d\times V\\\\m=1.738\ g/cm^3\times (2\times 3\times 3)\ cm^3\\\\m=31.284\ \text{grams}$

So, the mass of the block is 31.284 grams.

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3 years ago

Put the following steps of specimen preparation and staining in order: I. Application of staining dyes II. Heat fixation III. Sm

MrRissso [65]

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For green plant cells, which are the substances that result from photosynthesis that are used in cellular respiration? A. oxygen

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B. oxygen and glucose

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Oxygen for respiration and glucose for energy utilization

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