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Semmy [17]
3 years ago
14

What 2 elements are in the same group?

Chemistry
1 answer:
Alex777 [14]3 years ago
6 0

Explanation:

hydrogen and sodium are in same froup

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Which of the following are negative consequences of cobalt mining in the Democratic Republic of Congo? Select the two correct an
Georgia [21]

Some of the negative consequences of cobalt mining are pollution and child trafficking.

<h3>Effects of cobalt mining</h3>

Many young children are made to work in mines generally either due to continued struggle for survival or forced into it by child traffickers.

Apart from that, cobalt mining causes pollution in the environment. Inhalation of dust containing cobalt causes a host of health issues such as lung cancer and damage to human skin.

Other effects include soil degradation and pollution, water pollution due to mine run-offs, etc.

More on the effects of mining can be found here: brainly.com/question/2365629

7 0
2 years ago
45.0 g of Ca(NO3)2 are used to create a 1.3 M solution. What is the volume of the solution
Stells [14]
As we know that Molarity is given as,

                                       M = moles / V 
Solving for V,
                                        V = moles / M ------------------(1)
Also, moles is equal to,
                                       moles = mass / M. mass -------------(2)
puting value of moles from eq. 2 into eq. 1,
                                       V = (mass / M.mass) / M
Putting values,
                                       V = (45 g / 164 g/mol) / 1.3 mol/dm³

                                       V = 0.21 dm³ 
6 0
4 years ago
Why are covalent substances gases and liquid rather than solids?
garri49 [273]

Covalent compounds are held together with an intra molecular attraction which is weaker than metallic bond

hence covalent compounds exist as liquids, gases and soft solids

7 0
3 years ago
<img src="https://tex.z-dn.net/?f=what%20%5C%3A%20is%20%5C%3A%20photosynthesis%3F%3F%3F%20%5C%5C%20anyone%20%5C%3A%20zinda%20%5C
nevsk [136]

Answer:

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar

Explanation:

4 0
3 years ago
Read 2 more answers
Calculate the concentration of H3O⁺ in a solution that contains 1.8 × 10-5 M OH⁻ at 25°C. Identify the solution as acidic, basic
balu736 [363]

Answer:

A. 5.5 × 10⁻¹⁰ M, acidic

Explanation:

Step 1: Given data

Concentration of H₃O⁺: 1.8 10⁻⁵ M

Step 2: Calculate the concentration of OH⁻

We will use the ionic product of water.

Kw = 1.0 × 10⁻¹⁴ = [H₃O⁺] × [OH⁻]

[OH⁻] = 1.0 × 10⁻¹⁴/[H₃O⁺] = 1.0 × 10⁻¹⁴/1.8 10⁻⁵ = 5.5 × 10⁻¹⁰ M

Step 3: Determine if the solution is acidic, basic or neutral

  • If [H₃O⁺] > 10⁻⁷ M, the solution is acidic.
  • If [H₃O⁺] = 10⁻⁷ M, the solution is neutral.
  • If [H₃O⁺] < 10⁻⁷ M, the solution is basic.

Then, the solution is acidic.

8 0
3 years ago
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