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kykrilka [37]
2 years ago
14

A certain ore is 26.9% nickel by mass. How many kilograms of this ore would you need to dig up to have 50.0 g of nickel?

Chemistry
1 answer:
horsena [70]2 years ago
3 0
The answer is 185.87g to 2 decimal places.
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In order to expand agriculture and urban areas to meet increased demand for growing populations, water supplies often have to be
PSYCHO15rus [73]

Answer:

Decrease occur in the amount and flow of water bodies.

Explanation:

There is decrease in the amount and flow of water from water bodies such as rivers and lakes etc occur when the river is diverted from large water bodies because the water flows to the diverted sides and decrease occurs in the amount of water in the rivers and lakes. Those regions from where this river passes can also be negatively affected due to low amount of water they receives for their daily needs or for cultivation of crops so we can say that this diversion has adverse effect on other populations.

4 0
2 years ago
A pan containing 20 grams of water was allowed to cool from temperature of 95 degrees C. If the amount of heat released is 1200
mina [271]

Answer:

81 °C

Explanation:

I don’t know, I just know :)

8 0
2 years ago
Calculate the empirical formula of each of the following substances with the following compositions.
OleMash [197]

Explanation:

Note: Molar masses of elements can be found online or in the periodic table.

Moles of Magnesium

= 3.60g / (24.3g/mol) = 0.148mol.

Moles of Chlorine

= 10.65g / (35.45g/mol) = 0.300mol.

Mole ratio of Magnesium to Chlorine

= 0.148mol : 0.300mol = 1 : 2.

Hence we have the empirical formula MgCl2.

Moles of Lithium

= 9.1g / (6.94g/mol) = 1.311mol.

Moles of Oxygen

= 10.4g / (16g/mol) = 0.650mol.

Moles ratio of Lithium to Oxygen

= 1.311mol : 0.650mol = 2 : 1.

Hence we have the empirical formula Li2O.

7 0
2 years ago
Wind turbines are becoming an increasingly popular method of generating a community’s electricity. In wind turbines, wind is use
Tema [17]
The will not affect the wind. When it is windy the wind turns a turbine. Once the wind has gone through the turbine it is just normal wind, none of the wind is lost when this happened
4 0
3 years ago
Read 2 more answers
24.08 x 10^23 atoms of Boron (B) is equal to how many moles of Boron?
padilas [110]
1 mole ----------- 6.02 x 10²³ atoms
? mole ---------- 24.08 x 10²³ atoms

moles B = ( 24.08 x 10²³) x 1 / 6.02 x 10²³

moles B = 24.08 x 10²³ / 6.02 x 10²³

= 4 moles

Answer B

hope this helps!
5 0
2 years ago
Read 2 more answers
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