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konstantin123 [22]
3 years ago
12

Q3. A new pill (Wardine) has been created that reduces the side effects of the common cold! The

Chemistry
1 answer:
shutvik [7]3 years ago
4 0
I think he did 7 or 9
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Which of the following elements belong to the same group/family?
Tema [17]
Answer:
C. C and Pb
Carbon and Lead being in the same group.
5 0
3 years ago
Read 2 more answers
What is the mass of 1.33 moles of Ba3(PO4)2?
Serga [27]

Answer:

801 g

Explanation:

From the question given above, the following data were obtained:

Number of mole of Ba₃(PO₄)₂ = 1.33 moles

Mass of Ba₃(PO₄)₂ =?

Next, we shall determine the molar mass of Ba₃(PO₄)₂. This can be obtained as follow:

Molar mass of Ba₃(PO₄)₂ = (137.3×3) + 2[31 + (4×16)]

= 411.9 + 2[31 + 64]

= 411.9 + 2[95]

= 411.9 + 190

Molar mass of Ba₃(PO₄)₂ = 601.9 g/mol

Finally, we shall determine the mass of Ba₃(PO₄)₂. This can be obtained as follow:

Number of mole of Ba₃(PO₄)₂ = 1.33 moles

Molar mass of Ba₃(PO₄)₂ = 601.9 g/mol

Mass of Ba₃(PO₄)₂ =?

Mole = mass /Molar mass

1.33 = Mass of Ba₃(PO₄)₂ / 601.9

Cross multiply

Mass of Ba₃(PO₄)₂ = 1.33 × 601.9

Mass of Ba₃(PO₄)₂ = 801 g

8 0
3 years ago
A car covers a distance of 22.75 km in 17.04 minutes. Use dimensional analysis to calculate its speed in meters/second. Do not e
kati45 [8]

The speed of the car = 22.25 m/s

<h3>Further explanation</h3>

Given

A distance of 22.75 km

Time = 17.04 minutes

Required

The speed (in m/s)

Solution

Speed is the ratio of distance per time

Can be formulated :

v = d/t  

v= speed, m/s

d=distance=m

t=time,s

Input the value :

\tt v=\dfrac{22.75~km}{17.04~minutes}\times \dfrac{1000~m}{1~km}\times \dfrac{1~minute}{60~second}\\\\v=\boxed{\bold{22.25~m/s}}

3 0
3 years ago
What is the most stable monatomic ion formed from lithium?
s344n2d4d5 [400]

<u>Answer:</u> The ion formed by lithium element is Li^+

<u>Explanation:</u>

Ions are formed when an atom looses or gains electrons.

If an atom gains electrons, it leads to the formation of negative ions known as anions. For Example: Fluorine gains 1 electron to form F^- ions.

If an atom looses electrons, it leads to the formation of positive ions known as cations. For Example: Sodium looses 1 electron to form Na^+ ions.

Lithium is the 3rd element of the periodic table having 3 electrons.

The electronic configuration of lithium element = 1s^22s^1

This element will loose 1 electron to attain stable electronic configuration and will lead to the formation of Li^+ ion.

Hence, the ion formed by lithium element is Li^+

3 0
3 years ago
If you blow dry your wet hair is it a physical or a chemical change
Scilla [17]
Its a physical change
5 0
3 years ago
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