Questions in Grade High-school

Questions in Grade High-school

[Done] What is the result of adding KF to an equilibrium mixture of the weak acid HF? \[ \text{HF(aq) ⇔ H}^+ \text{(aq) + F}^- \text{(aq)} \] A. \(\text{F}^- \) concentration decreases B. The dissociation constant, \( K \), increases C. \(\text{HF} \) concentration decreases D. \(\text{H}^+ \) concentration decreases

[Done] Expand \((c - 2d)^5\). Please explain how one can expand it.

[Done] Which of the following did not contribute significantly to the Industrial Revolution in England in the late 1700s? A. Invention of an efficient steam engine B. Improved communication C. Invention of the automobile D. Better transportation

[Done] Why wasn't the style of Roman temples suitable for Christian worship?

[Done] The scale on a map is 2 cm = 1 km. Express this as a ratio.

[Done] What was Galileo Galilei known for? A. He is considered the founder of modern philosophy and the father of modern mathematics. B. He improved the telescope and proved that Ptolemy's claim that the moon had a smooth, polished surface was wrong. C. He was the first scholar to write that the Earth revolves around the sun. D. He introduced the law of gravitational force that is still used today.

[Done] Alcohol decreases your ability to see at night.

[Done] Which is the best estimate for this? \[ \frac{4}{5}\% \text{ of } 192 \]

[Done] How can I rename 5,400 as hundreds?

[Done] Which attitude towards the colonies was the result of the British embrace of the theory of mercantilism? A. Parliament required colonists to pay taxes in support of the British army in America. B. The British encouraged Americans to export raw goods to Britain. C. The monarch allowed colonists to create a diversified economy. D. English joint-stock companies built factories in America.