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4 years ago

Can someone please answer this

Chemistry

1 answer:

Lana71 [14]4 years ago

4 0

1 - 8
2 - 13
3 - 20
4 - 19
5 - 19
6 - 22
* protons - Atomic number
electrons - number of electrons is equal to number of protons k-41 is neutral
neutrons - Mass number - Atomic number
= 41 -19
= 22

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Mariulka [41]

Answer : The correct option is B- Towards the left.

Solution : Given,

Force on car in upward direction, $F_1$ = 6000 N

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From the given diagram we conclude that the $F_1$ and $F_2$ are in opposite direction and the force acting on car are same. So, their net force is zero.

And in case of $F_3$ and $F_4$ , the net force will not be zero because force acting on car are different. The car will accelerate towards left direction because $F_4$ is higher than the $F_3$ .

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3 years ago

Identify the limiting reactant when 7.81 g of HCl reacts with 5.24 g of NaOH to produce NaCl and H2O

elena55 [62]

Answer:

NaOH is limiting

Explanation:

Hcl + NaOH ------------ Nacl + H2O

Given 7.81g 5.24g

mol weights 1+35.5 23+16+1

36.5 40

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No of moles = weight/ molecular weight

No of moles of NaOH is lower so it is limiting as according to equation one mole of Hcl requires mole of NaOH so equal number of moles are required. NaOH is 0.131 which is far lower than 0.2139

-------- represents arrow in forward direction in equation

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3 years ago

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antiseptic1488 [7]

Answer:

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An element -

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3 years ago

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Answer:

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2 years ago

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enot [183]

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I hope this helps and please don't report

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3 years ago