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Taya2010 [7]
3 years ago
7

After 4 half-lives 10 grams of uranium remains. How much uranium did you start with?

Chemistry
1 answer:
Free_Kalibri [48]3 years ago
4 0

Answer:

i think 40 grams

Explanation:

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A scientist wrote down the steps to perform a chemical experiment, but they are out of order. Help the scientist by rearranging
ohaa [14]

Answer:

predict what's going to happen

measure 100 million distilled water into two beakers

measure out 0.3 grams each

dissolve each solid in a separate beakers of water

pour both solutions into one containers

watch mixture change

write a science report

make a presentation and share with peers

8 0
3 years ago
_____NaNo3+______PbO-_____Pb(No3)2+__Na2O
klio [65]

Answer:

2NaNO3+1PbO=1Pb(NO3)2+1Na2O

Explanation:

My chem teacher always had us make a T-chart for products and reactants on both sides to help you figure out balancing equations

4 0
3 years ago
When rolling a number cube 500 times, how many times you expect to get a 3?
andreyandreev [35.5K]

Answer:

\frac{250}{3}

Explanation:

you can expect to get a 3 (theoretically) 1 time every 6 times you roll. A 1/6 chance.

Here's the equation:

\frac{1}{6} =\frac{x}{500}

cross multiply (i think that's what it is called)

500=6x

divide by 6 on both sides:

x=\frac{250}{3} or approx 83 times.

Hope this helps! Lmk if u have more questions <3

3 0
3 years ago
PLEASE HELP MEEE I WILL MARK BRAINLIST FOR THIS ITS SUPER SIMPLE....BUT U MUST TYPE EVERYTHING needed ASAP
Ilia_Sergeevich [38]

Answer:

Because when they brought the cows back the Autumn Buttercup began to thrive. They took the cows out of the pasture thinking that the Autumn Buttercup would grow better. They noticed that the Autumn Buttercup was thriving in a field nearby where there were cows grazing.

a.) When the cows ate the grass in the fields, it made the grass shorter that the mice couldn't live there and be safe from their predators.

b.) When the cows walk on the soggy ground it pushes up the soil on the sides of the cow print where the buttercup like to grow and not directly in the soggy soil.

Nature has been developing its habitats for thousands and thousands of years. In time there is a balance where there aren't too many plants and animals, but enough food for each. When there is a change in any habitat and something is taken out or introduces, then it changes the population of different species where it may deplet one type of species and let another type of species overpopulate. It can cause species to extinct. It will take nature hundredsof years to find balance again.

Explanation:

8 0
2 years ago
Read 2 more answers
Which compound is soluble in water PbS BaS Na2S Fe2S3
Dmitry [639]

Answer:

The answer to your question is Na₂S, if you need to choices the other one is BaS

Explanation:

As a general rule, all the compounds that have sulfur, are insoluble in water, but the are some exceptions.

-Molecules with ammonia

-If the molecule has alkali metals is soluble

-If the molecule has Ca⁺², Sr⁺² and Ba⁺² is soluble in water.

From the compounds given, following the rules, the compound that is soluble in is Na₂S and perhaps BaS.

5 0
3 years ago
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