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3 years ago

17. When energy changes from one form to another, it is known as:

Chemistry

1 answer:

andreev551 [17]3 years ago

6 0

Answer:

Energy transformation

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What is the molarity of 10.0 g of NaCl dissolved in water to make 100. mL?

tigry1 [53]

Answer:

= 1.7 M

Explanation:

Molecular mass of NaCl = ( 23+35.5 ) = 58.5g

58.5g of NaCl are weighed by 1 mole of NaCl

10.0g of NaCl will be weighed by ( 10÷58.5 )

 = 0.17 moles of NaCl

100mL = ( 100÷1000)L = 0.1L

0.1L of a solution is occupied by 0.17 moles of NaCl

1L of solution will be occupied by [(1÷0.1)×0.17]

=1.7 M

5 0

4 years ago

An atom with 4 protons, 5 neutrons, and 4 electrons has an atomic mass of _____ amu. (Enter a whole number.)

STatiana [176]

I believe it would be the sum of protons & neutrons which equals 9 amu....

7 0

3 years ago

Read 2 more answers

A gas is contained in a horizontal cylinder with a moveable piston of cross-sectional area 0.33\text{ m}^20.33 m 2 . The region

-BARSIC- [3]

Answer:

0.02 m

Explanation:

∆U = q + w

w = ∆U - q = (1380 - 2040) J = -660 J

w = -p∆V = -pA∆h

∆h = -w/(pA)

p = 1 bar × (100000 Pa/1 bar) = 100000 Pa

∆h = -(-660 J)/(100000 Pa×0.33 m²) = 0.02 m

4 0

3 years ago

Current is created by the movement of what subatomic particle?

Licemer1 [7]

Answer:

I believe the answer is electrons.

Explanation:

Protons can't move and neurons don't have a charge so it would be electrons.

3 0

2 years ago

Milk has a density of 1.04 g/ml. If you have a volume of 510 ml, what is the mass in grams

Law Incorporation [45]

Density is defined as the ratio of mass and volume. The formula of density is:

$density = \frac{mass}{volume}$ -(1)

Density of milk = $1.04 g/mL$ (given)

Volume of milk = $510 mL$ (given)

Substituting the values in formula (1):

$1.04 g/mL = \frac{mass}{510 mL}$

$mass= 1.04 g/mL \times 510 mL$

$mass = 530.4 g$

Hence, the mass of the milk is $530.4 g$ .

4 0

3 years ago