2 years ago

ASAP!!!!!!!!!!!!

Chemistry

1 answer:

dlinn [17]2 years ago

6 0

<span>a. Tall prarie grass burns after being struck by lightning.</span>

You might be interested in

No one believed him b/c he had no

Rainbow [258]

Answer:

Chicken nuggets

hope it helps have a nice day

6 0

2 years ago

Read 2 more answers

Which rule for assigning oxidation numbers IS correct?

Vilka [71]

Answer:

B.) Oxygen is usually -2

Explanation:

Hydrogen is usually +1.

A pure group 1 element is not always +1.

A monoatomic ion can be a range of numbers. However, it must be a charge other than 0.

3 0

1 year ago

A scientist digs up sample of arctic ice that is 458,000 years old. He takes it to his lab and finds that it contains 1.675 gram

Fiesta28 [93]

Answer:

6.70 grams of krypton-81 was present when the ice first formed

Explanation:

Let use the below formula to find the amount of sample

$N= N_0(\frac{1}{2})^n$

where

$n = \frac{t}{t_{\frac{1}{2}}}$

here

t = 458,000 years

$t_{\frac{1}{2}}$ = 229,000

$\frac{t}{t_{\frac{1}{2}}}$ = \ $\frac{ 458,000}{229,000}$

n = $\frac{t}{t_{\frac{1}{2}}}$ = 2.000

Now substituting the values

$1.675 = N_0(\frac{1}{2})^{2.000}}$

$1.675 = N_0\times (0.2500)$

$N_0= \frac{1.675}{0.2500}$

$N_0=6.70$

3 0

2 years ago

Which metals have similar chemical properties? Check all that apply. barium

rodikova [14]

Alkina metals all have the similar proteries

6 0

3 years ago

What is the entropy of a solid based on

NeX [460]

The answer is:

The arrangement of the Atoms

4 0

3 years ago