Easy Question! Chemistry - Please help! I give thanks - It's the picture - Question 2

Answers

Answer 1

Answer: Volume of a cylinder = $\pi r^(2) h$
r = $(D)/(2)$
  = $(8.4cm)/(2)$
  = 4.2cm

h = 14.5cm
$\pi$ = 3.14

V= (3.14) * ( $(4.2cm)^(2)$ )*  14.5cm
= 803.1 $cm^(3)$

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In addition to resembling one another, what other criteria are required for organisms to be grouped in the same species? A.
They migrate only with one another.

B.
They fight only with one another.

C.
They share food only with one another.

D.
They reproduce only with one another.

Answers

D. They reproduce only with one another.

yeah it is D because I just took the test

Answer number 15 to get 20 points

Answers

corundum because it is hard and glassy

The volume of a gas at 99.0 kPa is 300.0 mL. If the pressure is increased to 188kPa, what will be the new volume?

Answers

Answer:

158.0 mL

Explanation:

We can solve this problem by using Boyle's law, which states that:

"For a fixed mass of a gas kept at constant temperature, the pressure of the gas is inversely proportional to its volume"

Mathematically:

$p\propto (1)/(V)$

where

p is the pressure of the gas

V is its volume

The equation can be rewritten as

$p_1 V_1 = p_2 V_2$

where in this problem:

$p_1=99.0 kPa$ is the initial pressure

$V_1=300.0 mL$ is the initial volume

$p_2=188 kPa$ is the final pressure

Solving for V2, we find the final volume:

$V_2=(p_1 V_1)/(p_2)=((99.0)(300.0))/(188)=158.0$ mL

C,H,O,+ 3HCI → C,HCl, + 3H20
right 5 possible mole ratios

Answers

Answer:

Here's what I get

Explanation:

I think this may be the equation you intended to write:

C₃H₅(OH)₃ + 3HCl ⟶ C₃H₅Cl₃ + 3H₂O

The mole ratios are the ratios of the coefficients in the balanced equation.

Here are some of the possible molar ratios.

C₃H₅(OH)₃:HCl = 1:3
C₃H₅(OH)₃:C₃H₅Cl₃ = 1:1
C₃H₅(OH)₃:H₂O = 1:3
HCl:C₃H₅Cl₃ = 3:1
HCl:H₂O = 3:3
C₃H₅Cl₃:H₂O = 1:3

What happens to the rock along the ridge when new molten material erupts?

Answers

The molten material then spreads out, pushing the older rock to both sides of the ridge. As the molten material cools, it forms a strip of solid rock in the center of the ridge. Then more molten material flows into the crack. The material splits apart the strip of solid rock that formed before, pushing it aside. Hope this helps! (:

Is boiling water a chemical reaction?

Answers

No boiling water is not a chemical change it would be a physical change

no it is a physical change

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