b. ivy growing around the pole of a fence
c. the angle of the sun changing during the day
d. outside temperature dropping at night
Answer:
CO2,H2S,HALON,FREON that's is the four toxicants that are heavier than air
Metal is most likely to be correct
potassium iodide.
The net ionic equation for the reaction that occurs when solutions of lead(II) nitrate and potassium iodide are combined in a test tube is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
Solutions of lead(II) nitrate and potassium iodide were combined in a test tube. This is a double displacement reaction. The complete ionic equation is:
Pb²⁺(aq) + 2 NO₃⁻(aq) + 2 K⁺(aq) + 2 I⁻(aq) ⇒ 2 K⁺(aq) + 2 NO₃⁻(aq) + PbI₂(s)
Spectator ions are those that appear both in the reactants and in the products. They do not participate in the reaction, so they do not appear in the net ionic equation. The net ionic equation is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
The net ionic equation for the reaction that occurs when solutions of lead(II) nitrate and potassium iodide are combined in a test tube is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
Learn more: brainly.com/question/21883718
Answer:
Explanation: When solutions of potassium iodide and lead nitrate are combined?
The lead nitrate solution contains particles (ions) of lead, and the potassium iodide solution contains particles of iodide. When the solutions mix, the lead particles and iodide particles combine and create two new compounds, a yellow solid called lead iodide and a white solid called potassium nitrate. Chemical Equation Balancer Pb(NO3)2 + KI = KNO3 + PbI2. Potassium iodide and lead(II) nitrate are combined and undergo a double replacement reaction. Potassium iodide reacts with lead(II) nitrate and produces lead(II) iodide and potassium nitrate. Potassium nitrate is water soluble. The reaction is an example of a metathesis reaction, which involves the exchange of ions between the Pb(NO3)2 and KI. The Pb+2 ends up going after the I- resulting in the formation of PbI2, and the K+ ends up combining with the NO3- forming KNO3. NO3- All nitrates are soluble. ... (Many acid phosphates are soluble.)
Answer:
Morphology and phylogenetics revealed by fossils. Perhaps the strongest evidence to support the Cambrian evolutionary explosion of animal forms is the first clear appearance, in the Early Cambrian, of skeletal fossils representing members of many marine bilaterian animal phyla
Explanation:
also pls vote brainliest <3 :)))
The Cambrian era saw significant changes in organisms reflected in the fossil record, including the emergence of complex multicellular life forms and the diversification of species. Fossils such as trilobites and brachiopods provide evidence of this biodiversity and adaptive radiation.
The Cambrian era is known for the rapid diversification of life forms, marked by the appearance of complex multicellular organisms. The fossil record from this era provides evidence of key evolutionary developments such as the emergence of hard-shelled animals, intricate body plans, and the colonization of different ecological niches. For example, the presence of trilobites, brachiopods, and archaeocyathids in the fossil record reflects the incredible biodiversity and adaptive radiation that occurred during the Cambrian.
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means ...
A. copper
B. silver
c. gold
D. tin
Answer:
A im pretty sure
Explanation: