Answer:
Option D is correct.
Explanation:
Compared to a sample of helium at STP, the same sample of helium at a higher temperature and a lower pressure because any gas at a higher temperature and a lower pressure will behaves like an ideal gas. for eg.
nitrogen at STP show its behavior as an ideal gas.
When pressure of a gas increased & temperature is decreased then the gas does not follow ideal gas law.
Therefore option D is correct.
Round off .00042557 to three significant digits is = 0.000426
<h3>What is round of value ?</h3>
- If 5, 6, 7, 8, or 9 come after the number you are rounding, round it up. For instance, 40 is the result of rounding 38 to the nearest ten.
- If the numbers 0, 1, 2, 3, or 4 come after the number, round it down. If 33 is rounded to the nearest ten, it becomes 30.
- To estimate a certain number in a context, rounding is a process. Look at the next digit in the correct position to determine how to round a number; if it is less than 5, round down, and if it is 5 or more, round up.
Given
The digit of 00042557
Three significant digits is 0.000426
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Answer:
NA + F2 = NAF - Chemical Equation Balancer.
2 Na + F 2 → 2 NaF
Na is a reducing agent, F 2 is an oxidizing agent. ; Pale-yellow to greenish gas with a pungent, irritating odor.
MnO₂(s) + 4 HCl(aq)→ MnCl₂(aq) + 2 H₂O(l) + Cl₂(g)
<u>Explanation:</u>
When aqueous solution of hydrochloric acid (HCl) reacts with solid Manganese(IV)oxide to form manganese(II)chloride in aqueous form, liquid water and then chlorine gas. The equation is given as,
MnO₂(s) + HCl(aq)→ MnCl₂(aq) + H₂O(l) + Cl₂(g)
It can be balanced by writing 2 in front of water and then writing 4 in front of HCl as,
MnO₂(s) + 4 HCl(aq)→ MnCl₂(aq) + 2 H₂O(l) + Cl₂(g)
So the balanced equation was found.