B. False. It is banned worldwide for agricultural uses. The use of DDT is still authorized in small proportions in countries that need it, with support deployed for the alteration to safer and more effective alternatives.

5 0

2 years ago

2. If volume is increased, the number of collisions per second

Archy [21]

Answer:

decreases

Explanation:

4 0

3 years ago

The density of titanium metal is 4.51 g/cm3 at 25 ∘C What mass of titanium displaces 68.6 mL of water at 25 ∘C∘C?

goblinko [34]

Answer:

The mass of titanium displaces 68.6 mL of water is 309.4 g.

Explanation:

Given that:-

$\rho=4.51\ g/cm^3$

$V=68.6\ mL$

Also, 1 $cm^3$ = 1 mL

So, $V=68.6\ cm^3$

The expression for the calculation of density is shown below as:-

$\rho=\frac{m}{V}$

Using the above expression to calculate the mass as:-

$m={\rho}\times V$

Applying the values to calculate the mass as:-

$m=4.51\ g/cm^3\times 68.6\ cm^3=309.4\ g$

The mass of titanium displaces 68.6 mL of water is 309.4 g.

5 0

3 years ago