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netineya [11]
4 years ago
10

I need help on thisall of them plz

Chemistry
1 answer:
yaroslaw [1]4 years ago
6 0
For the first question it would be a unit obtained from the change in velocity per unit of time or m/s^2.

The vf and vi represent the final and initial velocity of the object and or item.

Knowing the formula for acceleration is simply change in velocity divided by time

Vi = 0
Vf = 27 m/s
t = 10 s

Vf = vi + at

27 = 10a

a = 27/10 or 2.7 m/s^2.
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How much heat is required to raise the temperature of 250.0 g of mercury by 52 degrees * C with a specific heat of 4.18
Goryan [66]
Heat required = M * C * (delta T)
= (Mass)*(Specific heat)*(temperature change)
= 250 * 4.18* 52 = 54340Joules.

I solve when unit of specific heat is (J/gC) if have another unit please tell me
5 0
3 years ago
Read 2 more answers
Write the formal charge for each atom ok CH3COOH
Tomtit [17]
The formal charge of an atom is the assigned charge to the atom. Carbon 1 and carbon 2 both have +4 charge, H has a charge of +1, while O is calculated by the equation -1=4+3+4+2x where -1 is the charge of CH3COO and x is the charge of each O atom. Charge of O atom is -6.
6 0
4 years ago
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Calculate the mass of vanadium(V) oxide (V2O5) that contains a billion (1.000e9) vanadium atoms. Be sure your answer has a unit
Finger [1]

Answer:

1.510 × 10⁻¹³ g

Explanation:

Step 1: Given data

Number of atoms of vanadium: 1.000 × 10⁹ atoms

Step 2: Calculate the molecules of V₂O₅ that contain 1.000 × 10⁹ atoms of V

Each molecule of V₂O₅ has 2 atoms of V.

1.000 × 10⁹ atom V × (1 molecule V₂O₅/2 atom V) = 0.5000 × 10⁹ molecule V₂O₅

Step 3: Calculate the moles corresponding to 0.5000 × 10⁹ molecules of V₂O₅

We will use Avogadro's number: there are 6.022 × 10²³ molecules of V₂O₅ in 1 mole of V₂O₅.

0.5000 × 10⁹ molecule × (1 mol/6.022 × 10²³ molecule) = 8.303 × 10⁻¹⁶ mol

Step 4: Calculate the mass corresponding to 8.303 × 10⁻¹⁶ moles of V₂O₅

The molar mass of V₂O₅ is 181.88 g/mol.

8.303 × 10⁻¹⁶ mol × 181.88 g/mol = 1.510 × 10⁻¹³ g

7 0
3 years ago
Which choice best describes the polarity of bri5? view available hint(s) which choice best describes the polarity of ? the molec
solong [7]
Answer:
            T<span>he molecule is polar and has polar bonds.

Explanation:
                     Bromine pentaiodide has polar bonds because the electronegativity of Bromine is greater than Iodine. Hence, Bromine slightly pulls the electron towards itself making the bond slightly polar.
                      Overall molecule is polar because there is no symmetry in the molecule. Below attached figure of Bromine pentaiodide shows that bromine contains a lone pair of electron. Due to this lone pair of electron the molecule becomes asymmetric.</span>

4 0
4 years ago
Why is it necessary for the spins of two electrons that occupy one orbital, to be in the opposite directions? What is that law c
Ivanshal [37]

Answer:

The Pauli Exclusion Principle states that, in an atom or molecule, no two electrons can have the same four electronic quantum numbers. As an orbital can contain a maximum of only two electrons, the two electrons must have opposing spins.

Explanation:

The Pauli Exclusion Principle states that, in an atom or molecule, no two electrons can have the same four electronic quantum numbers. As an orbital can contain a maximum of only two electrons, the two electrons must have opposing spins.

5 0
3 years ago
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