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aev [14]
3 years ago
10

PLS HELPP FIRST TO BE CORRECT WILL GIVE BRANLIEST!!

Chemistry
1 answer:
Setler [38]3 years ago
8 0

Answer:

BaF2 + Na2S → BaS2 + <u>2</u>NaF (balanced equation)

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Lelechka [254]

Answer: heat

Other indicators: color change, odor, gas, temperature change.

3 0
3 years ago
When methane is completely combusted in oxygen forming carbon dioxide and
Goshia [24]

Answer:

The masses of the reactants and products are equal.

Explanation:

Hope this helps.

5 0
3 years ago
Find the no. of atoms present in 40g of nitrogen gas at STP?
nika2105 [10]

Answer:

8.60 * 10^{23} atoms N2

Explanation:

We want to convert grams to moles and then moles to atoms.

First, we convert grams of nitrogen gas (which is N2) to moles. To do so, we need the molar mass of N2, which is just 14.01 * 2 = 28.02 g.

40 g N2 * \frac{1 mol N2}{28.02 g N2} = 1.43 mol N2

Now, we need to convert moles to atoms by using Avogadro's number, which is 6.022*10^{23}:

1.43 mol N2 * \frac{6.022*10^{23} atoms N2 }{1 mol N2} = 8.60 * 10^{23} atoms N2

Thus, the answer is 8.60 * 10^{23} atoms N2.

6 0
3 years ago
How many lobes does a single sp3 hybrid orbital have?
dangina [55]

Two lobes.

The shape of four sp3 hybrid orbitals is part s and part p-each has two lobes but one lobe is much bigger (which is the lobe used for bonding)

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THE ASTHENOSPHERE IS CONSIDERED TO BE A SOFT SOLID.True or False
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Your answer is false
8 0
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