Answer: Compound
Explanation: pure substance that cannot be broken down into simpler substances by chemical or physical means. Each element has unique physical and chemical properties.
Answer:
180 mg
Explanation:
For a first-order reaction, we can calculate the amount of aspirine (A) at a certain time (t) using the following expression.

where,
k: rate constant
A₀: initial amount
If we know the half-life (
) we can calculate the rate constant.

When t = 4 h and A₀ = 400 mg, A is:

Common sense tells me that it is asthma cause i have it and yeah good luck
Answer:
ICMP Echo Request
Explanation:
ICMP Echo Request is a form of probe or message sent by a user to a destination system.