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4 years ago

6

A positively charged particle is placed next to an negatively charged object. In which direction does the positively charged par

ticle move? Explain why.

1 answer:

Arte-miy333 [17]4 years ago

4 0

Answer:

The positively charged particle will go towards the negatively charged particle because opposites attract.

Explanation:

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What is the difference between unconfined aquifers and confined aquifers?

Marta_Voda [28]

Answer:

A

Explanation:

Unconfined aquifers are those into which water seeps from the ground surface directly above the aquifer. Confined aquifers are those in which an impermeable dirt/rock layer exists that prevents water from seeping into the aquifer from the ground surface located directly above.

5 0

3 years ago

Determine the formula of chromic acid.

Katyanochek1 [597]

<u>Answer:</u> The formula of chromic acid is $H_2CrO_4$

<u>Explanation:</u>

We are given an ionic compound named as chromic acid. This acid is formed by the combination of hydrogen ion and chromate ion.

An acid is defined as the substance which releases hydrogen ion when dissolved in water.

Hydrogen is the 1st element of periodic table having electronic configuration of $1s^1$ .

This element will loose 1 electron to form $H^{+}$ ion.

Chromate ion is a polyatomic ion having chemical formula of $CrO_4^{2-}$

By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

So, the chemical formula for the given compound is $H_2CrO_4$

Thus, the formula of chromic acid is $H_2CrO_4$

8 0

3 years ago

Planes X and Y and points C, D, E, and F are shown.

Citrus2011 [14]

Answer:

The line drawn through points D and E.

Explanation:

Y is a horizontal line and D and E are both on the same line. If a line were drawn it would be within the Y plane.

3 0

3 years ago

Read 2 more answers

Iodine-131 is a beta emitter used as a tracer in radio immunoassays in biological systems. It follows first order kinetics. The

allsm [11]

<u>Answer:</u> The amount of Iodine-131 remain after 39 days is 0.278 grams

<u>Explanation:</u>

The equation used to calculate rate constant from given half life for first order kinetics:

$t_{1/2}=\frac{0.693}{k}$

where,

$t_{1/2}$ = half life of the reaction = 8.04 days

Putting values in above equation, we get:

$k=\frac{0.693}{8.04days}=0.0862days^{-1}$

Rate law expression for first order kinetics is given by the equation:

$k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}$

where,

k = rate constant = $0.0862days^{-1}$

t = time taken for decay process = 39 days

$[A_o]$ = initial amount of the sample = 8.0 grams

[A] = amount left after decay process = ?

Putting values in above equation, we get:

$0.0862=\frac{2.303}{39}\log\frac{8.0}{[A]}$

$[A]=0.278g$

Hence, the amount of Iodine-131 remain after 39 days is 0.278 grams

3 0

3 years ago

Which of these describe the orbit of a typical comet? Select all that apply.

scZoUnD [109]

its a, c and e i think. the other guy who answered was incorrect so i dont really know the answer

6 0

3 years ago