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zhenek [66]
3 years ago
15

HELP PLEASEEEEEEEEEEEEEEEEEE I CANT GO CANRVIL IF I CANT PASS THIS THEY WANNA SEE MY GRADES AND THIS WILL HELP ME GET MY GRADES

UP AND IM DOING ANOTHER QUESTION FOR THE REST OF THE PICS AND 30 POINTS!!! 6.5A Questions 1-6 are from Lesson 1.01. Directions: Identify the models in each picture as an element or a compound. Question 1 (Mandatory) (2 points) Saved Question 1 options: Question 2 (Mandatory) (2 points) Saved Question 2 options: Question 3 (Mandatory) (2 points) Question 3 options: Question 4 (Mandatory) (2 points) Question 4 options: Question 5 (Mandatory) (2 points) Question 5 options: Question 6 (Mandatory) (2 points) Question 6 options: 6.5B Questions 7-10 are from Lesson 1.01. Directions: Label each graph as either: Earth's Atmosphere, Earth's Crust, Earth's Oceans, or Life on Earth. Question 7 (Mandatory) (2 points) Question 7 options: Question 8 (Mandatory) (2 points) Question 8 options: Question 9 (Mandatory) (2 points) Question 9 options: Question 10 (Mandatory) (2 points) Question 10 options: 6.5C Questions 11-15 are from Lesson 1.02. Directions: Use the mnemonic to identify which type of evidence of a possible chemical change is shown. 6.5 Matter and energy. The student knows the difference between elements and compounds. The student is expected to: (C) identify the formation of a new substance by using the evidence of a possible chemical change such as production of a gas, change in temperature, production of a precipitate, or color change. Question 11 (Mandatory) (2 points) Question 11 options: Question 12 (Mandatory) (2 points) Question 12 options: Question 13 (Mandatory) (2 points) Question 13 options: Question 14 (Mandatory) (2 points) Question 14 options: Question 15 (Mandatory) (2 points)

Chemistry
1 answer:
Daniel [21]3 years ago
4 0

Answer:

3,3453 thank me later

Explanation:

1,3433

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Which statement explains why a C–O bond is
Nataly_w [17]

Answer: (3) The difference in electronegativity between  carbon and oxygen is greater than that  between fluorine and oxygen.

Explanation: Polarity of a molecule is due to the difference in electronegativity of the atoms. More is the electronegativity difference, more is the polarity.

Electronegativity of carbon = 2.5

Electronegativity of oxygen = 3.5

Electronegativity of fluorine = 4.0

Thus the difference in electronegativity of carbon and oxygen is=(3.5-2.5)= 1.0

Thus the difference in electronegativity of fluorine and oxygen is=(4.0-3.5)= 0.5.

Thus C-O bond is more polar than F-O bond.

4 0
3 years ago
Read 2 more answers
Which change of phase is most likely occurring in the beaker
solniwko [45]

Answer:

Evaporation

Explanation:

Heat makes molecules move and eventually evaporate.

5 0
3 years ago
Calculate the concentration of hydronium and hydroxide ions in a 0.050 M solution of nitric acid.
Mazyrski [523]

Answer:

[H₃O⁺] = 0.05 M & [OH⁻] = 2.0 x 10⁻¹³.

Explanation:

  • HNO₃ is completely ionized in water as:

<em>HNO₃ + H₂O → H₃O⁺ + NO₃⁻.</em>

  • The concentration of hydronium ion is equal to the concentration of HNO₃:

[H₃O⁺] = 0.05 M.

∵ [H₃O⁺][OH⁻] = 10⁻¹⁴.

<em>∴ [OH⁻] = 10⁻¹⁴/[H₃O⁺] </em>= 10⁻¹⁴/0.05 = <em>2.0 x 10⁻¹³.</em>

3 0
2 years ago
Consider this reaction:
ryzh [129]

Answer:

I think it's 6 moles are produced

3 0
2 years ago
When 551. mg of a certain molecular compound X are dissolved in 100 g of benzonitrile (CH,CN), the freezing point of the solutio
arsen [322]

Answer:

1.12g/mol

Explanation:

The freezing point depression of a solvent for the addition of a solute follows the equation:

ΔT = Kf*m*i

<em>Where ΔT is change in temperature (Benzonitrile freezing point: -12.82°C; Freezing point solution: 13.4°C)</em>

<em>ΔT = 13.4°C - (-12.82) = 26.22°C</em>

<em>m is molality of the solution</em>

<em>Kf is freezing point depression constant of benzonitrile (5.35°Ckgmol⁻¹)</em>

<em>And i is Van't Hoff factor (1 for all solutes in benzonitrile)</em>

Replacing:

26.22°C = 5.35°Ckgmol⁻¹*m*1

4.90mol/kg = molality of the compound X

As the mass of the solvent is 100g = 0.100kg:

4.9mol/kg * 0.100kg = 0.490moles

There are 0.490 moles of X in 551mg = 0.551g, the molar mass (Ratio of grams and moles) is:

0.551g / 0.490mol

= 1.12g/mol

<em>This result has no sense but is the result by using the freezing point of the solution = 13.4°C. Has more sense a value of -13.4°C.</em>

5 0
2 years ago
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