Many factors influence the composition of Earth's atmosphere. Identify the correct statements about Earth's atmosphere. Click to select the correct answers. Cyanobacteria are early organisms that produced oxygen, increasing oxygen in early Earth's atmosphere. Animals produce carbon dioxide, increasing carbon dioxide in the atmosphere. Industrial activity on Earth reduces the amount of carbon dioxide in the atmosphere. The burning of fossil fuels increase greenhouse gases in the atmosphere. Plants convert carbon dioxide and water into oxygen, decreasing oxygen in the atmosphere. The most abundant gas released into the atmosphere from volcanic systems is water vapor. Sulfur dioxide gas from volcanoes can lead to acid rain and air pollution. Carbon dioxide produced by volcanoes adds to greenhouse gases in the atmosphere. Oxygen concentration in the atmosphere have increased from swamps, rice fields, and ruminant animals.

Cyanobacteria are early organisms that produced oxygen, increasing oxygen in early Earth's atmosphere. Animals produce carbon dioxide, increasing carbon dioxide in the atmosphere.

The burning of fossil fuels increase greenhouse gases in the atmosphere.

The most abundant gas released into the atmosphere from volcanic systems is water vapor.

Sulfur dioxide gas from volcanoes can lead to acid rain and air pollution.

Carbon dioxide produced by volcanoes adds to greenhouse gases in the atmosphere.

when 25.0 ml of 0.700 mol/l naoh was mixed in a calorimeter with 25.0 ml of 0.700 mol/l hcl, both initially at 20.0 °c, the temperature increased to 22.1 °c. the heat capacity of the calorimeter is 279 j/°c.

the equation for the reaction is:

naoh + hcl → nacl + h₂o

moles of hcl = 0.0250 l hcl ×

0.700

mol hcl

1 l hcl = 0.0175 mol hcl

volume of solution = (25.0 + 25.0) ml = 50.0 ml

mass of solution = 50.0 ml soln ×

1.00

ml soln

= 50.0 g soln

δt=t2-t1

= (22.1 – 20.0) °c = 2.1 °c

the heats involved are

heat from neutralization + heat to warm solution + heat to warm calorimeter = 0

q1+q2+q3=0

nδh+mcδt+cδt=0

0.0175 mol ×

δh

+ 50.0 g × 4.184 j·g⁻¹°c⁻¹ × 2.1 °c + 279 j°c⁻¹ × 2.1 °c = 0

0.0175 mol ×

δh

+ 439.32 j + 585.9 j = 0

0.0175 mol ×

δh

= -1025.22 j

δh=1025.22j0.0175 mol= -58 600 j/mol = -58.6 kj/mol

they are made of gases.

they have a spherical shape.

they make energy through fusion.