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3 years ago

Select the correct answer.

2 answers:

8 0

Well, this is somewhat difficult, because an electron already creates an electric field. However, I know that when an electron moves it then creates a magnetic field. So, I'm going to safely assume that when an electron moves, it creates an electric, a magnetic, and a gravitational field.

I hope that helps!

spayn [35]3 years ago

3 0

Answer:

Which of the following exists around every object that has mass?

a magnetic field

magnetic poles

a gravitational field

electric charges

Explanation:

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Unlike ionic bonds, covalent bonds involve the

Anvisha [2.4K]

An ionic bond is when the atoms transfer electrons, rather than share electrons. This gives the ionically bonded elements a charge.

Unlike ionic bonds, covalent bonds involve the sharing of electrons between atoms.<span>

Answer: C. </span> sharing of electrons between atoms.<span> </span>

5 0

4 years ago

Calculate the specific heat capacity of the unknown metal given the

Vedmedyk [2.9K]

Answer: The specific heat capacity of the unknown metal given is $0.466 J/g^{o}C$ .

Explanation:

Given: Mass = 225 g

Change in temperature = $13^{o}C$

Heat energy = 1363 J

The formula used to calculate specific heat is as follows.

$q = m \times C \times \Delta T$

where,

q = heat energy

m = mass of substance

C = specific heat

$\Delta T$ = change in temperature

Substitute the values into above formula as follows.

$q = m \times C \times \Delta T\\1363 J = 225 g \times C \times 13^{o}C\\C = \frac{1363 J}{225 g \times 13^{o}C}\\= 0.466 J/g^{o}C$

Thus, we can conclude that the specific heat capacity of the unknown metal given is $0.466 J/g^{o}C$ .

3 0

3 years ago

A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 8.10kg of water at 33.9 degree

Anuta_ua [19.1K]

Answer:

309.1K

Explanation:

Step 1: Convert the flown heat to Joule

We will use the relationship 1 kJ = 1,000 J.

$69.0kJ \times \frac{1,000J}{1kJ} = 69.0 \times 10^{3} J$

Step 2: Convert the mass of water to gram

We will use the relationship 1 kg = 1,000 g.

$8.10 kg \times \frac{1,000g}{1kg} = 8.10 \times 10^{3} g$

Step 3: Convert the initial temperature to Kelvin

We will use the following expression.

K = °C + 273.15 = 33.9°C + 273.15 = 307.1 K

Step 4: Calculate the final temperature

We will use the following expression.

$Q = c \times m \times (T_f - T_i)$

where,

Q: heat

c: specific heat capacity

m: mass

T f: final temperature

T i: initial temperature

$T_f = \frac{Q}{c \times m} + T_i = \frac{69.0 \times 10^{3}J }{4.18J/g.K \times 8.10 \times 10^{3}g} + 307.1K = 309.1K$

3 0

3 years ago

Which is evidence that a chemical reaction has occurred? A) a phase change occurs B) a new gas is observed in the form of bubble

sweet [91]

Answer:

I think A) a phase change occurs

7 0

4 years ago

The following two reactions are important in the blast furnace production of iron metal from iron ore (Fe2O3):2C(s) + O2(g) -&gt

Inga [223]

Answer: A) 67.1 moles

Explanation:

The balanced reaction is :

$2C(s)+O_2(g)\rightarrow 2CO(g)$

$Fe_2O_3+3CO(g)\rightarrow 2Fe+3CO_2$

To calculate the moles, we use the equation:

$\text{Number of moles of iron}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{5.00\times 1000g}{56g/mol}=89.3moles$

According to stoichiometry;

2 moles of iron is produced by 3 moles of carbon monoxide

89.3 moles of iron is produced by= $\frac{3}{2}\times 89.3=134$ moles of carbon monoxide

2 moles of carbon monoxide is produced by = 1 mole of oxygen

Thus 134 moles of carbon monoxide is produced by = $\frac{1}{2}\times 134=67.1$ moles of oxygen

3 0

3 years ago