Which of the following are negative impacts on land resources caused by human activity? Check all that apply. erosion increase due to ocean waves
>>erosion increase due to road construction
>>chemicals used in mining entering the soil
>>desertification caused by deforestation
desertification caused by drought

Balance and in which category does it fit in? single or double displacement or synthesis or decomposition? (a) k2 o → k + o2 (b) na + i2 → nai (c) cu(no3 )2 + naoh → cu(oh)2 + nano3 (d) kclo3 → kcl + o2 (e) ca(no3 )2 + hbr → cabr2 + hno3 (f) sn(oh)2 → sno + h2 o (g) p4 + n2 o → p4 o6 + n2 (h) fe + al2 (so4 )3 → feso4 + al (i) alcl3 + na2 co3 → al2 (co3 )3 + nacl (j) c3 h6 + o2 → co2 + h2 o

In an exothermic reaction, energy may be released to the surroundings in the form of question 4 options: heat light thermal all of the above

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon