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2 years ago

PLease help me I am giving a lot of points for this please help me

Chemistry

2 answers:

umka2103 [35]2 years ago

8 0

Answer:Under unbalanced it’s motion,and after motion it’s speed.Then after speed it’s s=d/t,and d=distance and t=time.Lastly,the last one is graph.

Bond [772]2 years ago

6 0

Answer:

Under balanced its motion under motion its s = d/t under s - d/t is time d = distance s= speed

Explanation:

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A first order reaction has a rate

EleoNora [17]

Answer:

one-half

Explanation:

cuz for a first order reaction is a half life independent of concentration and constant over time

4 0

3 years ago

Burning wood represents a chemical change.<br> True or False?

Strike441 [17]

True
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7 0

3 years ago

Read 2 more answers

How many half-lives would something have gone through if you had 75% daughter product and 25% parent?

levacccp [35]

Answer:

Two Half-lives

Explanation:

Let number of Parent nuclei Initially present be X,

Then, finally $\frac{X}{4}$ Parent nuclei Will remain with $\frac{3X}{4}$ daughter nuclei.

In one half- life , parent nuclei becomes half of initial.

So, starting with X parent nuclei,

After one half-life, it will degrade to $\frac{X}{2}$ .

After another half life , Parent nuclei will become half of $\frac{X}{2}$

Which is equal to $\frac{X}{4}$ .

So, Parent nuclei have to go through Two half-lives.

6 0

3 years ago

A compound is found to contain 7.962 % silicon , 20.10 % chlorine , and 71.94 % iodine by mass. to answer the question, enter th

arlik [135]

Empirical formula is calculated as follows

calculate the moles of each element, that is % composition/ molar mass
molar masses ( Si= 28.09g/mol , Cl= 35.5 g/mol, I=126.9 g/mol)

moles of silicon = 7.962/28.09g/mol= 0.283 moles
moles of chlorine = 20.10 / 35.5g/mol = 0.566 moles
moles of iodine= 71.94 / 126.9 g/mol= 0.567 moles

divide each mole with smallest mole (0.283)
that is silicon = 0.283/0.283= 1 mole
chlorine = 0.566/0.283= 2 mole
Iodine= o.567/0.283= 2 moles
empirical formula is therefore= SiCl2I2

5 0

2 years ago

When a reaction has reached equilibrium... A. Q = K B. The rate of the forward reaction and the rate of the reverse reaction are

grin007 [14]

Answer:

The correct answer is option A.

Explanation:

Equilibrium is a state when rate of forward reaction is equal to the rate of backward reaction. The concentration of reactants and products becomes constant at this state.

The ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric coefficients is termed as Equilibrium constant. It is denoted by $K_{eq}$ .

aA + bB $\rightleftharpoons$ cC

$K_{eq}=\frac{[C]^c}{[A]^a[B]^b}$

4 0

2 years ago