Why does a person's heart rate increase during exercise?

(1) Less oxygen is needed.

(2) More oxygen is needed.

(3) Less carbon dioxide is needed.

(4) More carbon dioxide is needed

Which element has an atom with the chemical configuration 2-8-8-2 a). Mg b). NI c). Ca d). Ge

How many milliliters of 0.200 m fecl3 are needed to react with an excess of na2s to produce 0.345g of fe2s3 if the percent yield for the reaction is 65.0%?

Which term best describes the type of reaction that happens when a single element reacts with a molecule or compound producing a new single element and a new molecule or compound?

Find the volume of 0.100M hydrochloric acid necessary to react completely with 1.51g Al (OH) 3.

What element has 3 valance electrons and 4 energy levels

Four moles of hydrogen chloride (HCl) gas react with one mole of oxygen (O2) gas to produce two moles of chlorine gas (Cl2) and two moles of water gas (H2O).

what noble gas electron configuration is achieved by the bromine atoms in a molecule of BR2, a diatomic element?

What are facts on osmosis?

If a map of temperature displayed stripes parallel to the equator with equal temperatures at equivalent distances north and south of the equator, it would mean that only blank affected temperature.

What is the term for the amount of salts in water? Evaporation Evaporation Salinity Thermocline Density