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nignag [31]
3 years ago
15

State the atomic number and mass number of the element.

Chemistry
2 answers:
Ymorist [56]3 years ago
5 0

ANSWER:

What they said

Explanation:

ozzi3 years ago
3 0

Answer:

Please give me the Elements and I will help in the comments!

Explanation:

Hope I can help you!

:)

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Which properties are characteristic of metalloids?
Setler [38]
<h2>Answer:</h2>

<u>The right option is</u><u> (C) intermediate conductivity and a high melting point</u>

<h2>Explanation:</h2>

Metalloids usually look like metals but behave largely like nonmetals. Metalloids are shiny, brittle solids with intermediate good electrical conductivity. Their properties lie between metals and non metals. All metalloids exist as solids at room temperature and they have very high melting points. The physical properties of metalloids are more likely to be metallic, but their chemical properties tend to be non-metallic

7 0
3 years ago
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What is <br><br> 114.1 kPa to atm
denis23 [38]

Answer:

1.126 atm

Explanation:

4 0
4 years ago
Why do you think the location surrounding the pacific ocean is known as the ring of fire
snow_tiger [21]
It is on a plate boundary so there are a lot of volcanoes in that area. All the volcanoes form a "ring" around the plate boundary.
6 0
3 years ago
Some one help me please I'm stuck Show using two conversion factors how you would convert from 0.020 kg into mg.
julia-pushkina [17]

Answer:

=2.0x10^4mg

Explanation:

Hello there!

In this case, when performing units conversions involving two proportional factors we need to make sure we first convert to the base unit and then to the target one; thus, since 1 kg = 1000 g and 1 g = 1000 mg, we set up the following expression:

=0.020kg*\frac{1000g}{1kg} *\frac{1000mg}{1g} \\\\=2.0x10^4mg

Best regards!

4 0
3 years ago
If 60 ml of naoh solution neutralizes 40 ml of 0.50 m h2so4, the concentration of the naoh solution is most nearly:
Bad White [126]
<span>The balanced chemical equation for this reaction is:

2NaOH (aq)+H2SO4 (aq) → Na2SO4 (aq)+2H2O (l)

According to question, 60 ml of NaOH solution was used for neutralizing 40 ml of 0.50M H2SO4.

The no. of moles of H2SO4 is calculated using the equation:
mol solute = (molarity) (L soln)

mol H2SO4 = 0.50 M x 0.040 L = 0.02 moles of H2SO4

As per the equation, the number of moles of NaOH used is:

0.02 moles of H2SO4 (2 mol NaOH) (1 mol H2SO4) = 0.04 moles of NaOH

Therefore, using the given volume of NaOH, the concentration or molarity of NaOH can be calculated using the formula :

Molarity = mol solute/L soln = 0.04 mol NaOH/0.06 L = 0.67 M

Therefore, the concentration of NaOH is 0.67 M.</span>
3 0
3 years ago
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