Explain the difference between ionic and covalent bonding using the following term(s)

1(a). What is the solubility of calcium chloride (CaCl2) at 5°C?

In-s [12.5K]

Answer:

60 g/100 g water

Explanation:

Find 5 °C on the horizontal axis.

Draw a line vertically from that point until you reach the solubility curve for CaCl₂.

Then draw a horizontal line from there to the vertical axis.

The solubility of CaCl₂ is 60 g/100 g water.

7 0

3 years ago

Which soil layer is the least similar to the underlying rock

aliina [53]

It would be the top soil. The most dissimilar layer is the uppermost layer.

8 0

3 years ago

Read 2 more answers

What type of glassware is useful for transferring liquids from a big container to a small container?

tatuchka [14]

A beaker? I believe

3 0

4 years ago

Read 2 more answers

31,32 show work plz and help asap

Yakvenalex [24]

Answer: 31 (a) 4 32 (a) 5

(b) 7 (b) 3

(c) 5 (c) 5

(d) 3 (d) 2

Significant Figures (sf) Rules:

1) Trailing zeroes are considered significant ONLY If a decimal point is provided.

2) Zeroes between the decimal point and number are NOT significant unless they are between numbers.

3) All digits in scientific notation are counted (disregard the exponent).

31 (a) 508.0 trailing zero so use rule 1 --> sf = 4

(b) 820,400.0 trailing zero so use rule 1 --> sf = 7

(c) 1.0200 x 10⁵ scientific notation so use rule 3 --> sf = 5

(d) 807,000 no trailing zeroes so use rule 1 --> sf = 3

32 (a) 0.049450 zero between decimal point & #, use rule 2 --> sf = 5

(b) 0.000482 zero between decimal point & #, use rule 2 --> sf = 3

(c) 3.1587 x 10 ⁻⁸ scientific notation so use rule 3 --> sf = 5

(d) 0.0084 zero between decimal point & #, use rule 2 --> sf = 2

7 0

3 years ago

Reaccionan 49 gr de acido nitrico , con 36 gr de hidroxido de calcio , en un proceso donde se obtienen 97 gr de nitrato de calci

yan [13]

Answer:

Balanced reaction: 2HNOc + Ca(OH)₂ → Ca(NO₃)₂ + 2H₂O

Limiting reactant: HNO₃

Produced calcium nitrate + Produced water = 63.8 g+ 14 g = 77.8 g

This will be the theoretical yield, so you could not produce 97 g. Something's wrong.

Explanation:

The reactants are HNO₃ and Ca(OH)₂

The products are: Ca(NO₃) and H₂O

This is a neutralization reaction: 2HNO₃ + Ca(OH)₂ → Ca(NO₃)₂ + 2H₂O

We determine the limting reactant (mass / molar mass, to convert to moles):

49 g / 63 g/mol = 0.778 moles of nitric acid

36 g / 74.08 g/mol = 0.486 moles of hydroxide

1 mol of hydroxide reacts with 2 moles of acid

Then, 0.486 will react with (0.486 . 2) /1 = 0.972 moles of HNO₃

We do not have enough acid, because we need 0.972 moles and we have 0.778 moles, therefore the HNO₃ is the limtiing reactant:

Ratio between the nitric acid and nitrate is 2:1, so let's propose a rule of three:

2 moles of acid can produce 1 mol of nitrate

Then, 0.778 moles of acid will produce (0.778 . 1) /2 = 0.389 moles of nitrate

We convert the moles to mass: 0.389mol . 164.08 g / 1mol = 63.8 g

Ratio between the nitric acid and water is 2:2. For 0.778 moles of acid, I can produce the same amount of water. We convert the moles to mass:

0.778 mol . 18 g/mol = 14 g

Produced calcium nitrate + Produced water = 63.8 g+ 14 g = 77.8 g

This will be the theoretical yield, so you could not produce 97 g. Something's wrong.

Percent yield = (produced yield / theoretical yield) . 100

6 0

3 years ago