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masya89 [10]
3 years ago
8

In its aqueous solution, 99.9% of a substance dissociates to release hydronium ions. Which of the following is true for the subs

tance? (3 points)
a
It is a weak acid.

b
It is a weak base.

c
It is a strong acid.

d
It is a strong base.
Chemistry
2 answers:
lesantik [10]3 years ago
5 0

Answer:

C

Explanation:

It is a strong acid.

(Took the test!)

olga2289 [7]3 years ago
3 0
The answer is C. It’s a strong acid
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What is the mass of 3.01 x 10^21 atoms of Co
OlgaM077 [116]

Answer:

0.295 g Co

General Formulas and Concepts:

<u>Chemistry - Atomic Structure</u>

  • Reading a Periodic Table
  • Using Dimensional Analysis
  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Explanation:

<u>Step 1: Define</u>

3.01 × 10²¹ atoms Co

<u>Step 2: Identify Conversions</u>

Avogadro's Number

Molar Mass of Co - 58.93 g/mol

<u>Step 3: Convert</u>

<u />3.01 \cdot 10^{21} \ atoms \ Co(\frac{1 \ mol \ Co}{6.022 \cdot 10^{23} \ atoms \ Co} )(\frac{58.93 \ g \ Co}{1 \ mol \ Co} ) = 0.294552 g Co

<u>Step 4: Check</u>

<em>We are given 3 sig figs. Follow sig fig rules and round.</em>

0.294552 g Co ≈ 0.295 g Co

5 0
3 years ago
A mixture of methane and carbon dioxide gases contains methane at a partial pressure of 431 mm Hg and carbon dioxide at a
KatRina [158]

Answer:

XCH₄ = 0.461

XCO₂ = 0.539

Explanation:

Step 1: Given data

  • Partial pressure of methane (pCH₄): 431 mmHg
  • Partial pressure of carbon dioxide (pCO₂): 504 mmHg

Step 2: Calculate the total pressure in the container

We will sum both partial pressures.

P = pCH₄ + pCO₂

P = 431 mmHg + 504 mmHg = 935 mmHg

Step 3: Calculate the mole fraction of each gas

We will use the following expression.

Xi = pi / P

XCH₄ = pCH₄/P = 431 mmHg/935 mmHg = 0.461

XCO₂ = pCO₂/P = 504 mmHg/935 mmHg = 0.539

3 0
3 years ago
How do alpha particles compare to gamma rays?
Fofino [41]

Answer:

Unlike alpha and beta particles, which have both energy and mass, gamma rays are pure energy. Gamma rays are similar to visible light, but have much higher energy. Gamma rays are often emitted along with alpha or beta particles during radioactive decay.

-Radiation basics.

Explanation:

5 0
3 years ago
Read 2 more answers
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iris [78.8K]

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question

mass of block = 5 g

volume = 15 mL

The density of the block is

density =  \frac{5}{15}  =  \frac{1}{3}  \\  = 0.33333333...

We have the final answer as

<h3>0.33 g/mL</h3>

The block will float on water since it's density is less than that of water which is 1 g/mL

Hope this helps you

8 0
4 years ago
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Temka [501]
Mghcl14 + H2 = mghclh 16 work needed to solve this problem
8 0
3 years ago
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