2 years ago

Help with this one too please !

Chemistry

1 answer:

satela [25.4K]2 years ago

4 0

The second one and the 2 last ones

You might be interested in

A sound wave from a jackhammer travels through a section of concrete with a fixed frequency. At the concrete's boundary is mud.

Ira Lisetskai [31]

Answer:

It might be too late now, but the correct answer for the question is B.

Explanation:

According to the graph you can see when it hit the boundary of the mud it curved downward making the direction change; which then the mud probably had a hollow shell, where the speed was moving much faster.

6 0

3 years ago

Read 2 more answers

Ice is actually frozen ______

sergeinik [125]

Answer:

water

Explanation:

or h2o i mean theyre the same thing soo..

8 0

2 years ago

Read 2 more answers

What kind of bond is formed when lithium and fluorine combine to form lithium fluoride?

cupoosta [38]

Answer:

ionic bond

Explanation:

4 0

3 years ago

Read 2 more answers

Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas

Zinaida [17]

Answer: Number of molecules of hydrogen gas $6.32\times 10^{32}$

Explanation:

$2Na+2H_2O\rightarrow 2NaOH+H_2$

Number of moles of sodium = $\frac{\text{mass of sodium}}{\text{molar mass of sodium}}=\frac{48.7 g}{23 g/mol}=2.11mol$

According to reaction , 2 moles of sodium produces 1 mole of hydrogen gas , then 2.11 mol of sodium will= $\frac{1}{2}\times 2.11 mol$ of hydrogen gas that is 1.05 moles of hydrogen gas.