A 12 foot ladder is leaning against a building. The ladder makes a 45 degree angle with the building. How far up the building does the ladder reach?

Which structure does a plant cell have that an animal cell does not have?

Given the balanced equation representing a reaction: 2CO (g) + O2 (g) 2CO2 (g) What is the mole ratio of CO (g) to CO2 (g) in this reaction? (1) 1:1 (3) 2:1 (2) 1:2 (4) 3:2

How did the planets form? Question 12 options: Gravity pulled small bits of rock and dust together to form a larger mass The planets were instantly created during the big bang Large stars had gravity and brought matter together None of these answers

What type of rock cannot be changed into a metamorphic rock? A) sedimentary B) igneous C) metamorphic D) magma

Is there ny way to predict the exact location of any one marble drop on the target?

A solid substance turns into a liquid. Which best describes this change?

List two things you know about nonrenewable energy

Does a mole of hydrogen have the same mass as a mole of oxygen? explain your answer.

A 0.500-L sample of H₂SO₄ solution was analyzed by taking a 100.0mL aliquot and adding mL of. After the reaction occurred, an excess of ions remained in the solution. The excess base required mL of for neutralization.

Ammonia can be prepared by the reaction of magnesium nitride with water. The products are ammonia and magnesium hydroxide. Write and balance the equation.