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3 years ago

The first element on the periodic table of elements is carbon. A. True B. False

Chemistry

2 answers:

BabaBlast [244]3 years ago

7 0

b. False

The first element is hydrogen

ololo11 [35]3 years ago

6 0

False because Hydrogen is the first

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A weather balloon was initially at a pressure of 0.900 atm, and its volume was 35.0 L. The pressure decreased to 0.750 atm, with

marusya05 [52]

Boyle's Law

P₁V₁=P₂V₂

0.9 x 35 = 0.75 x V₂

V₂ = 42 L

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2 years ago

In a titration, 4.7 g of an acid (HX) requires 32.6 mL of 0.54 M NaOH(aq) for complete reaction. What is the molar mass of the a

katrin2010 [14]

Answer : The molar mass of an acid is 266.985 g/mole

Explanation : Given,

Mass of an acid (HX) = 4.7 g

Volume of NaOH = 32.6 ml = 0.0326 L

Molarity of NaOH = 0.54 M = 0.54 mole/L

First we have to calculate the moles of NaOH.

$\text{Moles of }NaOH=\text{Molarity of }NaOH\times \text{Volume of solution}=0.54mole/L\times 0.0326L=0.017604mole$

Now we have to calculate the moles of an acid.

In the titration, the moles of an acid will be equal to the moles of NaOH.

Moles of an acid = Moles of NaOH = 0.017604 mole

Now we have to calculate the molar mass of and acid.

$\text{Moles of an acid}=\frac{\text{Mass of an acid}}{\text{Molar mass of an acid}}$

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

$0.017604mole=\frac{4.7g}{\text{Molar mass of an acid}}$

$\text{Molar mass of an acid}=266.985g/mole$

Therefore, the molar mass of an acid is 266.985 g/mole

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3 years ago

Nuclear energy is the heat energy produced during controlled splitting, or ________ , of radioactive isotopes

erma4kov [3.2K]

Answer is: nuclear fission.
Nuclear fission is radioactive decay process in which the nucleus of an atom splits into smaller parts. In this process produces free neutrons and gamma photons and releases a very large amount of energy.
Nuclear fission produces energy for nuclear power and nuclear weapons.

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3 years ago

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Margaret [11]

Here is what Golgi looks like, so that you can look at the picture and describe it.
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Glad I could help, and good luck!
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3 years ago

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lord [1]

Answer:

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Explanation:

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3 years ago

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