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ollegr [7]
3 years ago
9

9. A push or a pull exerted on a body or an object

Chemistry
2 answers:
NikAS [45]3 years ago
7 0

Force is the push or pull exerted on a body

Usimov [2.4K]3 years ago
3 0

Answer:

is it multiple choice?

Explanation:

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Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 1.20 MJ 1
mars1129 [50]

Answer : The mass of liquid sodium needed are, 3.17\times 10^3g

Explanation :

First we have to calculate the number of moles of liquid sodium.

q=n\times c\times (\Delta T)

where,

q = heat absorb = 1.20 MJ = 1.20 × 10⁶ J

n = number of moles of liquid sodium = ?

c = specific heat capacity = 30.8J/mol.K

\Delta T = change in temperature = 10.0^oC=273+10.0=283K

Now put all the given values in the above formula, we get:

1.20\times 10^6J=n\times 30.8J/mol.K\times 283K

n=137.7mol

Now we have to calculate the mass of liquid sodium.

Molar mass of Na = 23 g/mol

\text{Mass of Na}=\text{Moles of Na}\times \text{Molar mass of Na}

\text{Mass of Na}=137.7mol\times 23g/mol=3167.1g=3.17\times 10^3g

Therefore, the mass of liquid sodium needed are, 3.17\times 10^3g

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4 years ago
When a certain isotope such as Pu-239 is hit by a neutron it will always split into the same smaller nuclei.
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What Element is named for the inventor of dynamite
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Nobelium discovered in Berkeley California
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A student performs the following experiment.
dybincka [34]

Answer:

Two different changes have occurred in the beaker. The description of the step 1 suggests that most likely a <u>chemical change</u> has occured while the description of the step 2 correspond to a<u> physical change</u>.

Explanation:

When the mixture of two liquid colorless substances results in the appearance of solid particles you first thing in the appareance of a new substance. If this is the case, it means that the original substances reacted chemically to form a new product, so this is a chemical change.

On the other hand, the second step describes just a physical change as it has been just that the yellow particles settled and then a physical separation by <em>decantation</em>. Decantation does not change the chemical properties of the particles settled, they are jsut separeated from the liquid. During this step both the yellow particles and the liquid in the beaker keep their chemical properties, so this is just a physical change.

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3 years ago
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Binary molecules have
Alborosie

Answer:

C

Explanation:

It is formed as a result of a reaction between two non-metals

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