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3 years ago

I need to know how to do all the levels of the worksheet

Chemistry

1 answer:

soldier1979 [14.2K]3 years ago

6 0

Answer:

xceleExplanatione:

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Help Pls!

Salsk061 [2.6K]

Answer:

d= 50.23 g/cm³

Explanation:

Given data:

radius = 137.9 pm

mass is = 5.5 × 10−22 g

density = ?

Solution:

volume of sphere= 4/3π r³

First of all we calculate the volume:

v= 4/3π r3

v= 1.33× 3.14× (137.9)³

v= 1.33 × 3.14 × 2622362.939 pm³

v= 1.095 × 10∧7 pm³

v= 1.095 × 10∧-23 cm³

Formula:

Density:

d=m/v

d= 5.5 × 10−22 g/ 1.095 × 10∧-23 cm³

d= 5.023 × 10∧+1 g/cm³

d= 50.23 g/cm³

8 0

3 years ago

Explain why an atom has a neutral charge

Vinvika [58]

Answer:

Atoms are neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged). If an atom gains or loses one or more electrons, it becomes an ion.

Explanation:

6 0

3 years ago

Read 2 more answers

Show calculations for determining the mass of sugar in an 8 oz sample of soft drinks.

poizon [28]

Answer:

$m_{sugar}=23.7g\ sugar$

Explanation:

Hello,

In this case, we can first compute the volume of the sample in mL from the ounces:

$8oz*\frac{29.5735mL}{1oz} =236.6mL$

Thus, with the volume of the sample, we can compute the amount of sugar given the 10 g of sugar per 100 mL of soft drink as shown below:

$m_{sugar}=236.6mL*\frac{10g\ sugar}{100mL}\\ \\m_{sugar}=23.7g\ sugar$

Best regards.

7 0

3 years ago

Help me with true or false :)

Ostrovityanka [42]

Answer:

Explanation:

4 is true

3 0

3 years ago

Which of the following best compares how magnetic fields are used in electromagnets and generators? Question 3 options: In an el

Nataly [62]

Answer:

In an electromagnet an electric current is used to produce a magnetic field; in a generator a magnetic field is used to produce an electric current.

Explanation:

An electric current moving through a wire produces a magnetic field (electromagnet), and

Wires moving through a magnetic field generate an electric current (generator).

8 0

3 years ago