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almond37 [142]
3 years ago
11

What is a reliable source ?

Chemistry
1 answer:
gayaneshka [121]3 years ago
5 0
A reliable source is a provider of information that is accurate, unbiased, and experienced. A magazine article is probably not a reliable source, while an encyclopedia is.

You should always check who the authors and verify their experience as it is often a good indication of whether or not something is reliable.
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Calculate the change in the kinetic energy (KE) of the bottle when the mass is increased. Use the formula
DerKrebs [107]

Answer:

1 kg

2 kg

3 kg

4 kg

Explanation:

i did the assignment

8 0
3 years ago
The distance between the nuclei of two iron atoms is about 4 angstroms.a. Trueb. False
vladimir2022 [97]

Answer:

The correct option is b. false

Explanation:

The distance between the nucleus of an atom and it's outermost shell is called is atomic radius. The atomic radius of an Iron atom (Fe) is 0.126 nm or 1.26 angstrom. The distance between the nuclei of two Iron atoms will be 1.26 × 2 = 2.52 angstroms.

Since 2.52 angstroms is lower than 4 angstroms, the correct option is false

8 0
3 years ago
Use the following equation to answer the questions below:
Gala2k [10]

Explanation:

The equation of the reaction is given as;

Be + 2HCl → BeCl2 + H2

What is the mass of beryllium required to produce 25.0g of beryllium chloride?

1 mol of Be produces 1 mol of BeCl2

Converting to mass;

Mass = Molar mass  *  Number of moles

9.01g of Be produces 79.92g of BeCl2

xg of Be produces 25g of BeCl2

Solving for x;

x = 25 * 9.01 / 79.92

x = 2.82 g

What is the mass of hydrochloric acid required to produce 25.0g of beryllium chloride? g

Converting 25.0g of beryllium chloride to moles;

Number of moles = Mass / Molar mass

Number of moles = 25 / 79.92 = 0.3128 mol

2 mol of HCl produces 1 mol of BeCl2

x mol of HCl would produce 0.3128 mol of BeCl2

solving for x;

x = 0.3128 * 2 = 0.6256 mol

Converting to mass;

Mass = 0.6256 * 36.5 = 22.83 g

What is the mass of hydrogen gas produced when 25.0g of beryllium chloride is also produced? g

25g of BeCl2 = 0.3128 mol of BeCl2

From the equation;

1 mol of H2 is produced alongside 1 mol of BeCl2

This means;

0.3128 mol of H2 would also be produced alongside 0.3128 mol of BeCl2

Mass = Number of moles * Molar mass

Mass = 0.3128mol * 2.0159 g/mol = 0.6306 g

3 0
3 years ago
Is krypton a non-reactive, highly reactive, or radioactive?​
Julli [10]

Answer:

Krypton does not react with anything, but it reacts with fluorine gas

Explanation:

7 0
1 year ago
a substance that undergoes a physical change like melting is still the same substance is it true or false​
Juli2301 [7.4K]

the answer would be true

3 0
3 years ago
Read 2 more answers
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