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iris [78.8K]
3 years ago
6

Two forces are applied to a 17kg box, as shown. The box is on a smooth surface

Chemistry
1 answer:
HACTEHA [7]3 years ago
5 0

Answer:

A. the box accelerated to at 1.0 m/s² to the right because the net force is 17N to the right.

Explanation:

To solve this problem, we need to find the net force acting on the body;

   Net force  = Forward force  - Backward force

  Forward force  = 35N

  Backward force  = 18N

 Net force  = 35N  - 18N = 17N

 So;

   Net force  = mass x acceleration

        17  = 17 x acceleration

        Acceleration  = 1m/s²

Therefore, the body moves in the forward direction with an acceleration of  1m/s²

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Answer:

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Explanation:

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4 0
3 years ago
An unknown compound is found to have a molar mass of 392.16 g/mol. If the empirical formula is C2H5PF2, what is the molecular fo
notsponge [240]

Answer:

C8H20P4F8

Explanation:

Molecular formula is based off a ratio of the molecular formula's molar mass divided by the empirical formula's molar mass.

The molar mass of the empirical formula C2H5PF2 is 98.02g. We find this by adding the molar masses of all elements in the formula, multiplied by their subscripts.

2(12.01) + 5(1.01) + 30.97 + 2(18.99) = 98.02

We then divide the molecular molar mass by the empirical molar mass.

392.16/98.02 = 4

This tells us that the molecular formula has 4 times the mass of the empirical formula. Because mass comes from the elements in the formula, we multiply all the subscripts by 4 to get the molecular formula.

2x4 = 8

5x4 = 20

1x4 = 4

2x4 = 8

So the molecular formula is C8H20P4F8

8 0
2 years ago
Which type of chemical bond involves the sharing of valence electrons between two atoms?
mr_godi [17]
Covalent bond is the type of bond which involves the sharing of valence electrons between two atoms. 
This bond usually arises from the equal attraction of the nuclei of the two atoms for the electrons shared.

Ionic bond, on the other hand, arises due to the transfer of electrons from the valence shell of one atom to the valence shell of the other.
7 0
3 years ago
How can the idea that different minerals are formed in different environments provide evidence for energy and matter cycling?
Drupady [299]

Answer:

The importance of crystal structure. The graphite-diamond mineral pair is an extreme example of the importance of crystal structure. These two very different minerals have exactly the same chemical formula (C), but the crystal structure of the two minerals is very different. In graphite, carbon atoms are bonded together along a flat plane, as shown in Figure 3.

5 0
3 years ago
Which balanced equation represents a redox reaction? a. AgNO3(aq) +NaCl(aq) →AgCl(s) +NaNO3(aq) b. H2CO3(aq) →H2O() + CO2(g) c.
Aleks [24]

Answer : The correct option is, (D) Mg(s)+2HCl(aq)\rightarrow MgCl_2(s)+H_2(g)

Explanation :

(A) AgNO_3(aq)+NaCl(aq)\rightarrow AgCl(s)+NaNO_3(aq)

This reaction is a double displacement reaction in which the cation and anion of two reactants are exchange their places to give two different products.

(B) H_2CO_3(aq)\rightarrow H_2O(l)+CO_2(g)

This reaction is a decomposition reaction in which the larger molecule decomposes to give two or more products.

(C) NaOH(aq)+HCl(aq)\rightarrow NaCl(s)+H_2O(aq)

This reaction is a neutralization reaction in which an acid and a base react to give a salt and water as a product.

(D) Mg(s)+2HCl(aq)\rightarrow MgCl_2(s)+H_2(g)

This reaction is a redox reaction in which the oxidation and reduction reaction occur simultaneously.

Oxidation reaction is the reaction in which a substance looses its electrons. In this oxidation state increases.

Reduction reaction is the reaction in which a substance gains electrons. In this oxidation state decreases.

In this reaction, magnesium shows oxidation due to change in oxidation number from (0) to (+2) and hydrogen shows reduction due to change in oxidation number from (-1) to (0).

Hence, the correct option is, (D)

7 0
3 years ago
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