0
Still curious? Ask our experts.
Chat with our AI personalities
Lao
Ezra
Vivi
Add your answer:
Earn +20 pts
How does the density of the elements change from silicon to leaf in group 4A?
vcfb dh
What is the dh of the sea water?
'dh' is an unknown property of seawater. If pH (measured value for acidity) is asked for: Seawater pH is limited to the range 7.5 and 8.4: ranging from neutral (7.0) to slightly alkaline (9.0), not acidic.
How us heat included in the equation of an endothermic reaction?
This question is oddly worded, but I am assuming that the author means to ask "in chemical equations for endothermic reactions, is the change in energy (delta H) positive or negative?". For endothermic reactions, heat is absorbed during the reaction, so the energy of the products is higher than the energy of the reactants. Since dH = H(products) - H(reactants). Therefore, dH is positive.
How many protons and electrons does a calcium atom have?
Calcium has 20 protons, 20 electrons and 20 neutrons in its most commonly found isotope.
20 centimeters is what part of a meter?
A meter is 100 centimeters, so 20 centimeters are 20/100ths of a meter, or 1/5th (20%).
