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3 years ago

What's the difference between spores and seeds?. PLEASE HELP!!!!!.

1 answer:

4 0

-A seed is larger than a spore.
-A seed is more advanced because it can sustain plant life.
-Found in different locations.
-Seeds can sprout mostly anywhere but spores requires a wet environment in order to germinate.
-Seeds are multicellular whereas spores are unicellular.

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In run 1, you mix 7.9 mL of the 43 g/L MO solution (MO molar mass is 327.33 g/mol), 3.13 mL of the 0.040 M SnCl2 in 2.0 M HCl so

blsea [12.9K]

Answer:

Concentration of H3O⁺ [H3O⁺] = 0.864 M

Explanation:

Given that:

The mass concentration of MO = 43 g/L

The volume of MO = 7.9 mL = 7.9 × 10⁻³ L

Recall that

The mass number of MO = Mass concentration of MO × Volume of MO

The mass number of MO = (43 g/L) * (7.9 × 10⁻³ L)

The mass number of MO = 0.3397 g

number of moles of MO = (mass number of MO) / (molar mass of MO)

number of moles of MO = (0.3397 g) / (327.33 g/mol)

moles of MO = 0.00104 mol

The total volume = 7.9 mL + 3.13 mL + 5.49 mL + 3.43 mL

The total volume = 19.95 mL = 19.95 × 10⁻³ L

Concentration of MO [MO} =(number of moles of MO) / (total volume)

[MO] = 0.00104 mol / 19.95 × 10⁻³ L

[MO] = 5.2130 × 10⁻⁸ M

the number of moles of H3O⁺ = molarity of HCl in the solution × the volume of HCl in solution

the number of moles of H3O⁺ = [(2.0 M) * (3.13 mL)] + [(2.0 M) * (5.49 mL)]

the number of moles of H3O⁺ = 17.24 mmol

Concentration of H3O⁺ [H3O⁺] = (the number of moles of H3O⁺) / (total volume)

Concentration of H3O⁺ [H3O⁺] = (17.24 mmol) / (19.95 mL)

Concentration of H3O⁺ [H3O⁺] = 0.864 M

5 0

3 years ago

If the number of moles of a gas initially contained in a 2.10 l vessel is doubled, what is the final volume of the gas in liters

Anon25 [30]

Avagadro's law gives the relationship between volume of gas and number of moles of the gas. When the temperature and pressure are constant, volume is directly proportional to number of moles of gas.
$\frac{V1}{n1} = \frac{V2}{n2}$
V -volume and n - number of moles of gas.
parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation
initial number of moles n1 - N
n2 - 2N as the number of moles are doubled
V1 - initial volume - 2.10 L
V2 - final volume - V
substituting the values in the equation
$\frac{2.10L}{N} \frac{V}{2N}$
V = 4.20 L
final volume is 4.20 L

7 0

3 years ago

1. A solution at 25 degrees Celsius is 1.0 × 10–5 M H3O+. What is the concentration of OH– in this solution?

Kazeer [188]

1. Answer:

1.0 × 10–9 M OH–

Explanation:

pH = -Log[H+]

pOH = -Log[OH-]

But;

pH + pOH = 14

Therefore;

[H+] + [OH-] = 1.0 × 10^-14 M

Therefore;

[OH-] = 1.0 × 10^-14 M - (1.0 × 10^–5 M)

= 1.0 × 10^-9 M OH–

2. Answer;

pH = 7.28

Explanation;

pH = -Log[H3O+]

Given;

[H3O+] = 5.2 × 10^–8 M

Therefore;

pH = - log [5.2 × 10^–8 M]

= 7.28

The pH is 7.28

3 0

3 years ago

Read 2 more answers

11.

vagabundo [1.1K]

Answer:

1.22 × 10^22 H atoms

Explanation:

From this question, TNT has the chemical formula: C-H5N306. The number of nitrogen atoms in the TNT substance is said to be 7.30 × 10^21 atoms.

The number of hydrogen atoms in the same TNT substance can be got using mole ratio. Based on the chemical formula, the mole ratio of hydrogen to nitrogen is 5:3 i.e. H5N3.

This means that;

Number of atoms of hydrogen = 5/3 of the number of atoms of nitrogen.

Hence, number of H atoms = 5/3 × 7.30 × 10^21

number of H atoms = (7.30 × 5/3) × 10^21

number of H atoms = (36.5/3) × 10^21

number of H atoms = 12.1666 × 10^21

number of H atoms = 1.2166 × 10^22 atoms.

Approximately, number of H atoms in TNT is 1.22 × 10^22 atoms.

8 0

3 years ago

đốt cháy hoàn toàn 9 g một axit cacboxylic no đơn chức mạch hở thu đc 6,72 l CO2 (dktc). Xác định Công thức của Axit

butalik [34]

Answer:

esh eod jod mq'e

Explanation:

uere hi'dh uoi

5 0

3 years ago