Is it true

In a chemical reaction, the combined molar masses of the reactants is greater than the combined molar masses of the products.

The atomic number of an element is found by counting the of what in an atom

Which of these binary systems is most likely to contain a black hole? A. An x-ray binary containing an O star and another object of equal massB. A binary with an X-ray bursterC. An X-ray binary containing a G star and another object of equal mass

The imaginary line which passes through the North and South Poles, upon which the Earth rotates once every 24 hours is called the Prime Meridian. Correct?

Which circuit has the weakest current 9v battery or 1.5v aa battery

Human activities that do not cause an imbalance in the water cycle and the carbon cycle are considered eco-friendly. The activities that cause an imbalance in the cycles are considered not eco-friendly.

Max (15 kg) and Maya (12 kg) are ice-skating on a frozen pond. At one moment, when Max is skating away from the shore at 8.2 m/s and Maya is skating towards the shore at 4.6 m/s, they collide and bounce off each other without falling.

7. When a wave crosses a surface at an angle from one medium into another, why does it change directions as it moves across the boundary into the new medium? Use 3 - 4 complete sentences in your own words to explain.

Why doesnt the moon get pulled into the sun

One mole of water is equivalent to 18 grams of water. a glass of water has a mass of 200 g. how many moles of water is in this?

A ball is thrown upward and reaches a maximum height of 100m and then returns back to where it was launched. The displacement of the ball is A) 0 m B) 100 m C) 200 m D) more than 200 m