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Svetlanka [38]
4 years ago
9

Why do scientists use models?

Chemistry
1 answer:
Travka [436]4 years ago
6 0

Answer:

Models make some things easier to understand.

Measurements can be made only on models.

Models help scientists visualize things they can’t see.

Models are perfectly accurate representations of objects.

Scientists can analyze models to make predictions.

Explanation:

Mark as brainliest......

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How many grams are equivalent to 1.80 x 10^-4 tons? (English tons)
konstantin123 [22]

Answer:

163.44 g

Explanation:

We know that one ton is equal to 2000 lbs and one lb is equal to 454 grams.

Solution:

1.80 × 10∧-4 ton× 2000 lb/ton× 454 g/lb

1.80 × 10∧-4 ton× 2× 10³lb/ton× 454 g/lb

1634.4 g/ 10 = 163.44 g

8 0
3 years ago
Calculate Delta n (change in moles of gaseous substances) for each of the following balanced chemical equations...
Lerok [7]
<span>2<span>C6</span><span>H6</span>O(l)+17<span>O2</span>−−>12C<span>O2</span>(g)+12<span>H2</span>O(l)</span>
<span>2S<span>O2</span>(g)+<span>O2</span>(g)−−>2S<span>O3</span>(g)</span>
<span><span>N2</span>(g)+<span>O2</span>(g)−−>2NO(g)</span>
<span>2Na(s)+B<span>r2</span>(l)−−>2NaBr(s)</span><span>
On the 1st 3 I have
12 -17 = -5
2 - 3 = -1
2 - 2 = 0
For the last one:
</span><span>Delta n=0</span><span>
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3 0
3 years ago
What is the meaning of nucleus<br>​
IrinaVladis [17]

the nucleus is an organelle containing the cell's chromosomes

8 0
3 years ago
Select all of the answers that apply. Water _____. has a pH of 0 can dissolve most substances contains dissolved minerals expand
aleksandrvk [35]
<span>Water: *can dissolve most substances * contains dissolved minerals *expands when it freezes</span>
5 0
3 years ago
Read 2 more answers
Discuss whether two products are required for a chemical reaction. (NEED HELP ASAP)
Alex787 [66]

Answer:

Yes.

Explanation:

"These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products."

There is a beginning product, and a reactant is needed in order for something to happen.

For example, according to Newton, something cannot happen until an exterior force comes and stops/pushes it.

Sorry if this is incorrect, I am just 4th grade :(

6 0
3 years ago
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