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Grace [21]
3 years ago
9

The total number of protons and neutrons in the nucleus of an atom is called the___________

Chemistry
1 answer:
Helen [10]3 years ago
6 0
This answer is nucleons
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In order to draw a conclusion, scientists must_______ data from an investigation
Alenkinab [10]
The answer is record
6 0
3 years ago
if a lead can be extrated with 92.5% efficiency,what is the mass of ore required to make a lead sphere with 750%cm radius
Lady_Fox [76]
The mass of ore required is 21 700 t.

r = 750 cm

V = \frac{4}{3}  \pi  r^{3} = \frac{4}{3}  \pi  (750 cm)^{3} = 1.767 × 10⁹ cm³

The density of lead is 11.34 g/cm³.

So mass of lead sphere = 1.767 × 10⁹ cm³ × \frac{11.34 g}{1 cm^{3} } = 2.004 ×10¹⁰ g

2.004 ×10¹⁰ g × \frac{1 kg}{1000 g} = 2.004 × 10⁷ kg

2.004 × 10⁷ kg × \frac{1 t}{1000 kg} = 2.004 × 10⁴ t

92.5% efficiency means 92.5 t Pb per 100 t of ore.

Mass of ore = 2.004 × 10⁴ t Pb ×\frac{100 tore}{92.5 t Pb} = 2.17 × 10⁴ t ore = 21 700 t ore

6 0
3 years ago
A car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car?
Advocard [28]
Speed=distance/time  

D=150km

S=7200s 

Divide the numbers. 

150/7200=0.02km/s <---final answer
5 0
3 years ago
. When a person weighs himself in pounds, which system of measurement is he using?
timama [110]

Answer:

Weight is a 'force' and in the imperial system, it is measured in pounds-force (lbf or lbf). You might hear this term used together with the term 'slug'. A slug has a mass of 32.174049 lb.

Explanation:

8 0
2 years ago
What material was added to powdered rock during tuttle and bowen's experiments?
Rzqust [24]

Answer:

water was added to powdered rock

Explanation:

4 0
2 years ago
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