PLEASE HELP I'VE DONE MOST OF THEM BUT THESE I DONT GET ( 30 POINTS)!!! 1. Tin (II) Chloride is mixed with Manganese metal, as shown below. Which of the following compounds will exist afterwards?

SnCl2 + Mn --> ?

Select one or more:
a. SnCl2
b. MnCl2
c. SnCl and MnCl
d. SnMn
e. Cl2

2.What is the oxidation number for Cobalt in the following compound?

CoSO4

Select one or more:
a. 0
b. 1
c. 2
d. 3
e. 4

3. Which of the following compounds will exist after Nickel (II) Oxide is mixed with Calcium as shown below?

NiO + Ca --> ?
Select one or more:
a. O2
b. CaO
c. NiCa
d. CaO2

4. In the following reaction, which element is being reduced?

C2H2 + O2 --> H20 + CO2

Select one or more:
a. O
b. H
c. C
d. C and H

5. When the following two aqueous solutions are mixed, what will happen?

Na3PO4 (aq) + Al(NO3)3 (aq) -->

Select one or more:
a. AlPO4 will appear as a precipitate.
b. PO4NO3 will appear as a precipitate.
c. AlNa3 will appear as a precipitate.
d. NaNO3 will appear as a precipitate.
e. No reaction. The ions will remain dissolved in water.

6. When these aqueous solutions are mixed, which of the following will happen?

AgNO3 (aq) + KI (aq) -->

Select one or more:
a. No reaction. The ions remain in an aqueous state.
b. KNO3
c. INO3
d. AgK
e. AgI

26. of of (aq) by (aq) is . if 50.00 ml of 1.05 m is to 25.00 ml of 1.86 m ,at be? ( no is toina of aof) , h.. (p. ). . .

1. an experiment in your science class lists the materials needed for the lab. it is your job, as a lab partner, to measure out 25 ml of distilled water and 2.5 grams of magnesium. what lab measuring tools would you choose to measure each substance and how would you use each tool to get the correct amounts? be sure to describe the process you would follow step-by-step. (5 points) 2.which of the following is an si base unit for measuring mass? (2 points) ampere gram meter pound 3.which of the following is an si base unit for time? (2 points) decades hours minutes seconds 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer. 5.a pencil beside a metric ruler. the ruler is scaled from 1 centimeter to 10 centimeters, with markings for millimeters between each number. one end of the pencil is beside the 0 on the ruler, and the pencil point is beside the 5. which of the following measurements is accurate but not precise? (2 points) 5 mm 5 cm 50 mm 50 cm 6. which of the following prefixes represents the largest value? (2 points) giga hector kilo milli 7. which of the following types of graphs is best for plotting the percentages of a whole value in a data set? (2 points) bar graph circle graph histogram line graph

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device