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4 years ago

Valence electrons are important because these are the only electrons involved with an atom's

1 answer:

3 0

Valence electrons are important because these are the only electrons involved with an atom's chemical reactivity.

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For most answers, you will simply enter your numeric answer directly into the space provided to the right of the equal sign. Ans

katovenus [111]

Answer: The number of dozen of eggs are 12

Explanation:

We are given:

Total number of item = 144

This is equal to 1 gross of iems

Converting the given items into dozens, we use the conversion factor:

1 dozen = 12 items

Converting the items, we get:

$\Rightarrow 144\text{ items}\times (\frac{1\text{ dozen}}{12\text{ items}})=12\text{ dozens}$

Hence, the number of dozen of eggs are 12

7 0

3 years ago

The advantage of a fixed pulley on a flag pole is that it______.

Finger [1]

Your answer would be A for your homework

6 0

3 years ago

Calculate the mass of sodium bromide dihydrate is required to prepare 250 mL of a 0.00600 M solution

ollegr [7]

Answer: The mass of sodium bromide dihydrate is 0.208 grams

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n = moles of solute

$V_s$ = volume of solution in ml = 250 ml

moles of $NaBr.2H_2O$ = $\frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{138.92g/mol}$

Now put all the given values in the formula of molality, we get

$0.00600=\frac{x\times 1000}{138.92\times 250}$

$x=0.208$

Therefore, the mass of sodium bromide dihydrate is 0.208 grams

8 0

3 years ago

38 An aluminum sample has a mass of 80.01 g and a density of 2.70 g/cm3. According to the data, to what number of significant fi

Furkat [3]

The answer is (3) 3. The calculation rule of significant figures is when multiplication and division, the significant figures of result is equal to the least of the numbers involved. The significant figure of 2.70 and 80.01 is 3 and 4.

3 0

3 years ago

Read 2 more answers

During science class, while studying mixtures, you mix together table salt and sand. Your teacher challenges you to separate the

olga2289 [7]

The property to be used is sieving. you get a bowl and a sieve when you pour the sand and salt,the salt being the small particle sieve to the bowl while the sand remain on the sieve as residue

7 0

4 years ago