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3 years ago

Identify the basic structure of a chemical equation?

Chemistry

1 answer:

antiseptic1488 [7]3 years ago

3 0

It is the crust, the least dense layer.

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7. Which of the following represents the largest mass?

Tamiku [17]

Answer:

10kg = 10 x 1000 = 10,000g

Explanation:

To know the quantity with the largest mass, we have to express all the units in grams:

for: 2 x 10mg = 2 x 10 x 10⁻³ = 0.02g

0.001kg = 0.001 x 1000 = 1g

1 x 10⁵ng = 1 x 10⁵ x 10⁻⁹ = 0.0001g

2 x 10²cg = 2 x 10² x 10⁻² = 2g

10kg = 10 x 1000 = 10,000g

Note:

10⁻ ¹ deci(d)

10⁻² centi(c)

10⁻³ milli(m)

10⁻⁹ nano(n)

10³ kilo(k)

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4 years ago

What is a single celled orginium able to do

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<span>Many life forms consist of a single cell. As well as simple bacteria, there are more complex organisms, known as protoctists. Unlike bacteria, they have complex internal structures, such as nuclei containing organized strands of genetic material called chromosomes. Most are single-celled, but some form colonies, with each cell usually remaining self-sufficient.</span>

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3 years ago

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Strike441 [17]

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3 years ago

Read 2 more answers

A flame test of a colorless solution gives a bright yellow color. When reacted with AgNO3 a white precipitate forms that dissolv

hichkok12 [17]

Answer:

The compound is Na2CO3

Explanation:

A flame test of a colorless solution gives a bright yellow color. The yellow color shows the presence of Sodium.

NaX + AgNO3 → AgX + NaNO3

When reacted with AgNO3 a white precipitate.

AgX + HNO3 → AgNO3 + H2O + CO2

A white precipitate will be formed when AgNO3 reacts with Sodium Chloride (NaCl) or Sodium carbonate(Na2CO3). (Also NaF, Na3PO4 are possible).

When HCL is added to the unknown solution, bubbles form.

Forming bubbles means that there is formed CO2 (and H20)

Na2X + 2HCl → 2NaCl + H2O + CO2

To form CO2 there is carbon needed

This shows that X is CO3 and the compound is Na2CO3

<u>To control:</u>

Na2CO3 + AgNO3 → Ag2CO3 + NaNO3

⇒Ag2Co3 is the white precipitate formed

This precipitate Ag2CO3 + HNO3 will disolve in AgNO3, CO2 and H2O

When Na2CO3 reacts with HCl there is formed NaCL together with bubbles ( which is CO2 and H2O).

The compound is Na2CO3

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4 years ago

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Explanation:

D. The total mass of the reactants equals the total mass of the

products.

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3 years ago