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horsena [70]
3 years ago
6

What is the charge of the nucleus of every atom?

Chemistry
1 answer:
ohaa [14]3 years ago
7 0
The charge is neutral
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Number of neutrons for 9BE4
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2 years ago
(01.01 MC) Which of the following could be considered a scientific statement?
Travka [436]

The correct answer is option C, that is, it appears that ants live in colonies.

The statement, that is, pizza is the best-tasting food on Earth is false, as it cannot be tested. The statement, that is, I believe that there is life on other planets is not a scientific statement, as it is just a belief. The statement, that is, I think nuclear energy is bad is also not a scientific statement as it is just an opinion.  

The statement, that is, it appears that ants live in colonies is a scientific statement as one can observe and test this.  

5 0
2 years ago
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A hot air balloon can have a volume of 2950 cubic meters (2.95 ✕ 106 liters) and operate at temperatures up to 250°F (121°C). As
TiliK225 [7]

Answer:

2.64 × 10⁶ g

Explanation:

We can find the mass of air using the ideal gas equation.

P.V=n.R.T=\frac{m}{M} .R.T

where,

P is the pressure (P = 1.00 atm)

V is the volume (V = 2.95 × 10⁶ L)

n is the number of moles

R is the ideal gas constant (0.08206atm.L/mol.K)

T is the absolute temperature (121°C + 273 = 394 K)

m is the mass

M is the molar mass (28.09 g/mol)

m=\frac{P.V.M}{R.T} =\frac{1.00atm \times 2.95 \times 10^{6} L \times 28.97g/mol}{(0.08206atm.L/mol.K) \times 394 K } =2.64 \times 10^{6} g

7 0
3 years ago
A substance composed of two or more elements in a fixed, definite proportion is.
Arisa [49]

Answer:

Compound

Explanation:

-compound is a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds.

7 0
2 years ago
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