Questions by Parisa

Questions by Parisa

In 1271, Marco Polo departed Venice and traveled to Kublai Khan's court near Beijing, approximately 7900 km away in a direction we will call positive. Assume that the Earth is flat (as some did at the

asked Mar 9, 2020

1 answer

1 vote

183k views

1. Which elements are known as d-block elements? transition metals alkali earth metals halogens alkali metals

asked Feb 24, 2020

2 answers

2 votes

5.7k views

Given CH4+2O2—>CO2+2H2O what mass of oxygen would be needed to form 17 grams of carbon dioxide

asked Feb 14, 2020

1 answer

3 votes

192k views

Plant cells and animal cells were observed under a microscope. The characteristics of two cells are listed below. Cell C: Has a cell membrane Cell D: Has a large vacuole Which statement about the two cells

asked Nov 14, 2019

2 answers

2 votes

205k views

How does the energy in food become available to organisms?

asked Jun 27, 2019

1 answer

4 votes

106k views

Help with this please

asked Apr 7, 2019

1 answer

4 votes

166k views

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