3 years ago

What’s the compound name of Ca2N

Chemistry

1 answer:

KIM [24]3 years ago

8 0

Calcium and Nitrogen

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blueberry high fiber muffins contain 51% dietary fiber by mass. if a package with a net weight of 12oz contains six muffins, how

mars1129 [50]

51% of twelve is 6.12

6.12 divided by 6 is 1.02

your answer is 1.02

3 0

3 years ago

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Given that Kw for water is 2.4×10−14 M2 at 37 °C, calculate the pH of a neutral aqueous solution at 37 °C, which is the normal h

Nitella [24]

Answer:

pH = 6.80. The aqueous solution is slightly acid

If pH is 7.00 at 37°C, solution is neutral

Explanation:

2H₂O ⇄ H₃O⁺ + OH⁻ Kw = 2.4×10⁻¹⁴

To determine the pH of a solution, we must consider the [H₃O⁺]

[H₃O⁺] . [OH⁻] = 2.4×10⁻¹⁴

[H₃O⁺] = [OH⁻] → √2.4×10⁻¹⁴ = [H₃O⁺]

1.55×10⁻⁷ = [H₃O⁺]

pH = - log 1.55×10⁻⁷ = 6.80

pH = 7 → neutral

pH < 7 → acid

pH > 7→ basic

6 0

4 years ago

Which of the following are true about a block of ice at -10 degrees Celsius as you continue to apply heat.

LekaFEV [45]

<span>It’s temp will remain at 0 degrees Celsius until all the ice Melts
</span>

5 0

4 years ago

A rug sits in a sunny place on the floor for a long time.

Sophie [7]

Answer:

no clue

Explanation:

but you got this

4 0

4 years ago

A chemical test has determined the concentration of a solution of an unknown substance to be 2.41 M. a 100.0 mL volume of the so

Oksana_A [137]

Answer : The molar mass of unknown substance is, 39.7 g/mol

Explanation : Given,

Mass of unknown substance = 9.56 g

Volume of solution = 100.0 mL

Molarity = 2.41 M

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

$\text{Molarity}=\frac{\text{Mass of unknown substance}\times 1000}{\text{Molar mass of unknown substance}\times \text{Volume of solution (in mL)}}$

Now put all the given values in this formula, we get:

$2.41M=\frac{9.56g\times 1000}{\text{Molar mass of unknown substance}\times 100.0mL}$

$\text{Molar mass of unknown substance}=39.7g/mol$

Therefore, the molar mass of unknown substance is, 39.7 g/mol

5 0

3 years ago